Type By: Sally Nelson
rtftohtml By: Ed Chapman
The Dyna-Step weight control system consists of the following:
1. CD-/Op Station
2. Weight Control Unit
3. Motor Drive and Feedback Unit
4. Actuators and Stepper Motors
5. Linear Voltage Differential Transducer (LVDT) Feedback Devices
6. Datronics Signal Conditioning Module
The CD-Op Station is the primary operator inferface for the Dyna-Step CD weight control system. The CD-Op Station is used to:
- Enter or change setup data
- Select profiles to be displayed
- Select the systems operating mode
- Request changes to slice positions
- Select target profile
- Select print options
- View alarms and messages
System and process testing is also done at the CD-Op station to obtain information needed to properly tune the Dyna-Step system and for system trouble shooting. This will be covered in the "Process Analysis and Tuning" section.
The Weight Control Unit is the part of the system stat receives basis weight profile updates from the host computer, does all control calculations, and sends output signals to the stepper motor drive modules. The weight controller interfaces with:
- The host computer (through the link)
- The Simul-step Interface Unit
- Output control signals
- LVDT feedback signals
- CD-op Center (through the CD-Net)II. DYNA-STEP ACTUATOR INSTALLATION AND SYSTEM STARTUP
Before starting a Dyna-Step system both electrical and mechanical portions of the system should be thoroughly tested to ensure a smooth startup with satisfactory CD weight control following the startup. This should all be completed before the shutdown to install the Dyne-Step actuators so the shutdown can be properly planned with all equipment which will be needed for the installation. Any faulty components such as the slice lip connectors or apron can be replaced or repaired during the shutdown.
The following procedure is to test the Dyna-Step computer and interface cabinet to be certain all components work properly and there are no wiring errors. This should be completed before the shutdown to install actuators on the headbox.
After starting the Dyna-Step computer and interface cabinet, the internal wiring should be tested. This is best done by connecting a spare Dyne-Step actuator or just a spare stepper motor to the output of each motor controller. Test each drive circuit and repair as needed. If available you can also use an oscilloscope to check for the proper signal at logical locations in each drive circuit. Turn off the bend limits in the SAC board setup data (node 21) before testing the drive circuity.
A thorough test of the internal wiring for LVDT's is very time consuming. It is best to visually check wiring and wait tell the LVDT's are all connected during the shutdown to complete the testing.
You should check the communications between the Daytronic signal conditioning module and the SAC board. If the transmit and receive LED's on the front of the daytronic are oscillating then the two units are communicating. If not, check the wiring between the SAC board and Daytronic. Also this wiring serves as the null modem at termination_______________.
Set-up data must be entered into the Daytronic Signal Conditioning Module before initial system start-up and after changing the central processor/interface card. After starting the Daytronic, setup data concerning communications with the SAC board must be entered. This is all covered in the Service and Installation Manuals and will not be covered here.
Also, the Daytronic must be set up for the LVDT signals and any other signals which it will be receiving. This is done as follows.
The "type" of measurement signal must be identified for each channel. The measurement signal will typically be from an LVDT which uses the "type" designation 24. This establishes the calibration procedure the Signal Conditioning Module must use for the sensor (LVDT) calibration. The channel is the software position which can be assigned to any signal input. On a paper machine with 25 slices, channels 1 to 25 are assigned to LVDTs 1 to 25. To make any set-up changes the EEPROM write protect switch on the front of the central processor/interface card must be on. Enter the following command:
TYP x=v [CR]
Where x is the channel number and v is the "type" designation. {CR} means to press the Carriage Return or Enter key on the key pad. For our LVDTs enter the following command:
TYP 1=24 [CR] for slice 1 LVDT
TYP 2=24 [CR] for slice 2 LVDT and continue for all LVDTs.
To inform the Signal Conditioning Module of the physical "location" of each channel number x relative to the System Conditioning Module's "A Slots" use the following command:
LCT x=w [CR]
Where w is a four digit number. The first digit will always be 1 for the Model 10K1 Signal Conditioning Module. The next two digits represents the "A" card slot number and can be 01 through 20 numbered left to right. The fourth digit assigns the subchannel for each "A" card and can be 1 or 2 for LVDTs. For slices 1 through 5 the "location" is entered as follows:
LCT 1=1011 [CR] for slice 1
LCT 2=1012 [CR] for slice 2
LCT 3=1021 [CR] for slice 3
LCT 4=1022 [CR] for slice 4
LCT 5=1031 [CR] for slice 5
You should zero the readings for the LVDT's by entering zero for all LVDT calibrations. This will allow the Daytronic to have zero as the output for all LVDT positions. Turn on the EEPROM switch and enter the following command for each slice.
EMM 1 = 0.00 for slice 1 scaling factor
EMM 2 = 0.00 for slice 2
EMM 3 = 0.00 for slice 3 etc. for all slices.
BEE 1 = 0 for slice 1 offset
BEE 2 = 0 for slice 2 offset
BEE 3 = 0 for slice 3 offset etc. for all slices.
At least one month before the shutdown to install Dyna-Step actuators the following tests should be performed on the headbox and paper machine process to ensure a smooth installation and ensure good results are obtained from the control after startup. This procedure requires two people.
To test the existing slice lip, slice rods, slice lip to rod connectors, LVDT"s, and actuators; dial indicators must be assembled on a test stand and the slice lip must be levelled. The dial indicator and test stand kits are available from the product support group.
Make certain all the fourdrinier drive equipment and the fan pump are
electrically disabled before beginning any work on the fourdrinier.
It is essential the headbox apron is straight, clean, and in generally good condition. Cleanliness and general condition are visual inspections for any scale buildup, nicks. scratches, dents etc. Straightness can be tested in several different ways. Before starting any test ask the operator to open the slice to about 1.5" to facilitate testing.
The simplest and probably most accurate is by comparing the apron straightness to known straight rulers. You will need a one ft. rule, a two ft. rule, and a three ft rule, preferably all spring tempered steel. Two sets of feeler gauges are used to measure the amount the apron deviates from the rule. The feeler gauges should range form 0.001" or 0.0015" to 0.030".
Simply hold the 3' rule on its edge along the leading edge of the apron and check for any clearance between the rule and the apron. If there are any abrupt changes in clearance of more than 0.0005" per inch of machine width then there is reason for concern. Take careful notes of these measurements across the entire width of the paper machine.
Another method for testing apron straightness is with precision optical level manufactured by Wild Herrbrug. Measurements are accurate to about 0.0015" which is about the dame as the rule and feeler gauges. The optical level also lets you know if there is an overall slope to the apron. The levelness of the breast roll can also be checked.
The general condition of the apron is determined by visually inspecting the headbox with the aid of a good flashlight. Check the apron and slice across the width of the headbox for any scratches. dents, or discoloration. Feel any discolored areas to determine if the surface is rough from scale buildup or corrosion. All surfaces of the apron should be highly polished and very smooth. Scale buildup of 0.002" can cause problems for some light weight fine paper grades. I have seen scale buildup of 0.25".
The slice should be opened to 1.0-1.5" to facilitate testing. Ensure the Plexiglass stand-offs are firmly mounted on the bottom of the test stand to prevent scratching the polished surface of the headbox apron. There should be no sharp corners or screws which may damage the slice lip.
Assemble a single dial indicator on the test stand to measure the slice lip opening. Check several slice openings across the headbox and zero the dial indicator at the approximate average opening. Set all slice openings to this zero or reference point by adjusting the slice screws. A quick first pass should be made across the headbox for all slices and then more precise adjustments for every slice. Keep in mind that an adjustment on any one slice will affect the opening on the adjacent slices.
With the slice lip leveled hold the one ft. rule flat against the slice lip being very careful not to damage the slice lip. Using a good flashlight, inspect the lip to determine if there are any areas where the lip is not fairly straight. Check for any unusual curvatures.
The slice lip to slice rod connections should be tested to ensure that the slice lip responds to any movement of the slice rod. The test stand must be assembled with two dial indicators. One dial indicator is to measure movement of the slice lip and the second dial indicator measures movement of the slice rod. Since the test stand assembly procedure will be different for each headbox, it is not possible for me to provide an assembly procedure for the test stand.
You should start with level slice lip. Ideally, the slice lip will be straight and in a zero strain condition. Mount the test stand to measure slice lip and slice rod movement and set both dial indicators to zero. Rotating the face of the dial will make it a little easier to zero the dial. Test the connector by adjusting the slice down 0.010", back to zero, up 0.010", and back to zero again. Both dials should respond identically to actuator movements and there should be movement of both dial indicators for each adjustment of the slice screw. If neither dial moves while performing this test be careful the dial indicators do not reach the end of the test range. If this happens, no movement of the dial will occur and this may be misinterpreted as faulty slice equipment.
If the existing slice rods are to be use with the Dyna-Step actuator these rods should first be checked for excessive loss of movement. Check as many slice rods as time permits. This lest should be performed in conjunction with the test for the slice rod to lip connectors. Using a 1 to 2 ft. straight edge compare to the slice rod for straightness of the slice rod. Measure the amount the slice rod is nonlinear and record the deformation.
Perform this test in conjunction with the slice lip to rod connector test. Check for straightness of each rod with the slice position at zero, +0.010", and -0.010". A little geometry will tell you the vertical movement loss.
While performing the above "Slice Lip Connection Test Procedure" the slice screw or actuator should be tested for backlash. First determine the amount of adjustment of the actuator required for 0.001" movement at the top of the slice rod. This can be determined either from the gear ratio of the actuator obtained from vendor information or by taking measurement of slice rod movement vs. actuator adjustment. Measured values are more reliable.
After the slice has been adjusted to +0.010 inch the person adjusting the slice screw should monitor the amount of adjustment in the reverse direction before the slice rod dial indicator begins moving. He should also note if movement at the slice rod stops at any time during the adjustment from +0.010 inch to -0.010 inch. Either type of movement loss (directional backlash or slop in the slice screw) should be corrected if it more than 0.001 inch.
Any movement of a slice will cause a slight movement of the adjacent slices, but this should be minimized by using a slice lip which is very flexible in the vertical direction. A slice lip which is excessively rigid will result in excessive movement of adjacent slices, loss of movement in the slice rod, flexing of the connection at the bottom of the slice rod, excessive wear at the slice lip connection assembly, and excessive wear of the slice actuators.
Movement of the slice lip for the adjacent slice should never be over 30% of the slice lip movement for the slice adjusted. This can be measured using the slice lip test kit. Assemble the test stand with two or three dial indicators are used to measure slice movement of the two adjacent slices. Adjust the slice screw while monitoring all three dial indicators. Record the results an repeat for several slice positions.
The general condition of the headbox is very important for good CD weight control. Any disturbances in the approach piping to the headbox or anything which may affect the flow pattern inside the headbox can effect CD weight control. Pay close attention for any vibrations in the piping from the fan pump to the headbox. Rectifier rolls and showers in air padded headboxes can cause flow disturbances. Simply watching the flow exiting the headbox can give some insight of what may be causing excessive MD or CD variability.
Poor weight profiles can also result from anything which can cause nonuniform drainage on the fourdrinier. This can result from a poor delivery on the forming board, a worn wire, worn or dirty foils, pluggage in a vacuum drainage unit, etc. However, the dry weight profile is set when the sheet reaches the wet line on the fourdrinier. If you have trouble finding the wet line ask the machine tender.
Installation of the Dyna-Step system requires mechanical installation and testing, and electrical installation and testing.
The mechanical installation of the Dyna-Step actuators which must be completed during a shutdown includes the following:
Remove the old actuators and slice, and carefully inspect the slice. Replace the slice if needed.
Thoroughly clean any surfaces on the headbox for installation of new equipment.
Install the Dyna-Step actuators and slice lip.
Level the slice lip to the apron.
Zero the dial indicators.
The Dyna-Step hardware installation procedure below is a general procedure. Follow manufacturer's recommended procedures to complement the procedures found below. Slice removal, installation, and levelling procedures vary depending on headbox design. For a given headbox manufacturer and design the slice leveling procedure may vary depending on date of manufacture, width of the headbox, and possibly machine speed
Extreme caution should always be exercised when working on the customer's headbox to prevent damaging the equipment. In the stock delivery section of the headbox even a scratch to a wetted surface is considered damage.
The old actuators must first be removed from the headbox. Before beginning work be sure to lock out all fourdrinier drive motors and the fan pump motor, Lay some press felt over the headbox apron to prevent accidental damage. Remove slice lip and place on felt or other soft surface to prevent damaging. Remove all old slice screws, rods etc. necessary to install the new Dyna-Step actuators.
Thoroughly inspect the slice being careful not to damage the slice or be cut by the slice. Check for corrosion or other damage to surfaces which may affect the flow from the slice or vertical movement of the slice. Check the slice for straightness by comparing to a precision straight edge. Thoroughly clean the slice to remove any deposits.
All slice control equipment on the headbox which will be reused should be thoroughly cleaned and inspected.
A light film of lubricant should be applied to the back of the slice before installation.
Usually it is easiest to install 4-8 slice actuators and slice lip connectors first, to mount the slice lip to these slice lip connectors. Level the lip at each of these slice actuators and then install all remaining actuators. Adjust the rod length as close as possible y adjusting the slice connector to rod threads. Additional rod length adjustment will also be needed by adjusting the handwheel on the slice actuator but this will result in a small loss of actuator control range.
Refer to the headbox manufacturer for specifics for headbox conditions for levelling the slice. A few which I am familiar with are provided below.
Sulzcher Escher Wyss Step diffuser headbox. Set water recirculation temperatures approximately equal to the room temperature at least one hour before levelling.
Voith W type headbox. Maintain automatic anti-deflection controller setpoint the same as while the paper machine was running. When levelling the slice lip if there id a difference in slice opening between the center and the two ends then adjust the zero point of the anti-deflection controller. The anti-deflection controller automatically controls the water recirculation temperature to maintain a flat slice.
Beloit Converflow. There are no controls.
After levelling the slice lip to the apron all dial indicators must be zeroed before any additional adjustment to any handwheels are made. Loosen the clamp around the base of the dial indicator and adjust the dial indicator to zero. Retighten the clamp and replace the cover over the dial indicator.
Complete the electrical connections of LVDT's and stepper motors to the interface cabinet.
Calibrate LVDT's and check for proper working order.
Check the setup data in Dyna-Step computer. Use the attached preliminary setup data.
Test all stepper motors for proper working order. If pre-startup electrical check has been performed any wiring errors will be between the motor controllers and the stepper motors. A spare stepper motor with connectors to check at the headbox, at the terminations leaving the interface cabinet, and at the motor controllers will prove very valuable to determine the reason for any malfunctions.
Connect the air purge.
Check the order of the wiring compared to the electrical drawings for one complete LVDT and stepper motor circuit, then compare all other LVDT and stepper motor circuits to the one verified. The LVDT circuits are especially important since they can be wired several ways and still work. Stability and accuracy of the LVDT will be poor if not wired correctly and future trouble shooting will be difficult.
CALIBRATION OF SENSORS
Calibration data must now be entered for each channel. If the central processor/interface card was replaced the previous calibration data should be recorded before removing the old. The existing calibration constants, scaling factor (EMM) and offset (BEE) can be viewed as follows:
EMM x [CR]
BEE x [CR]
These values can be entered as follows:
EMM x=m [CR] for a scaling factor
BEE x=b [CR] for an offset b
For a new system start-up or to level the slice and zero the LVDT's, all LVDT's must be zeroed (ZRO) then forced (FRC) to read the desired measurement after adjusting the LVDT's. This can be accomplished as followed:
1. Adjust all slices from the headbox to read zero at the dial micrometers.
2. Zero each slice at the Signal Conditioning Module by entering the following command for each slice or channel:
ZRO x [CR]
ZRO 3 [CR] for slice 3
Or zero a group consecutive slices or channels as follows:
ZRO x TO y [CR] for slices 1 through 25:
ZRO 1 to 25 [CR]
3. Adjust all slices from the headbox to read 20 mils at the dial micrometer.
4. Force each slice to read 20 mils at the Signal Conditioning Module by entering the following command:
FRC x=20.00 [CR]
FRC 3=20.00 [CR] for slice 3
Or force a group of consecutive slices to all read 20 mils by entering the following command:
FRC x TO y=20.00 [CR]
FRC 1 TO 25=20.00 [CR] for slices 1 through 25
EEPROM WRITE PROTECT SWITCH
The EEPROM write protect switch must be ON before making any set-up changes to the Signal Conditioning Module. AFTER COMPLETING SET-UP CHANGES THE EEPROM SWITCH SHOULD BE TURNED OFF. If the EEPROM is on during a power failure the set-up will likely be erased and then must be re-entered.
The LVDT's should now all be tested for proper working order. Adjust all actuators at the headbox and check the signal conditioning module (Daytronic) to be certain all LVDT's are working correctly. If any do not work correctly simply try swapping two LVDT connections at the actuator and recheck. Next try swapping two Daytronic conditions cards and recheck. Next carefully inspect all wiring terminations especially the connectors at the actuator. Any problem will probably be a loose wire, next suspect the conditioner card, and least likely is the LVDT.
From the CDOp station or the maintenance panel check each slice position for proper movement to the actuator. If the pre-startup electrical checkout has been performed, any wiring errors will be between the motor controllers and the stepper motors. A spare stepper motor with connectors to check at the headbox, at the terminations leaving the interface cabinet, and at the motor controllers will prove very valuable to determine the reason for any malfunctions.
It is unlikely to have any problems with stepper motors or with motor controllers. Wiring mistakes are almost always the cause for malfunctions in the drive circuit.
Tuning the Dyna-Step CD weight consists of mapping the measurement scanner to the slice actuators, optimizing CD slice position smoothing, optimizing edge control, selecting weight ranges for automatic grade selections, determining any target profiles needed, and training the operator how the system works and what process variable affect CD weight control.
Proper alignment or mapping of the weight measurement data is critical to good control. once the alignment has been established it should not be changed unless the measurement scan parameters have changed. Alignment is simply matching measurement data to the proper position across the width of the paper and is not a tuning parameter to be adjusted back and forth using trial and error trying to improve the profile.
First the outside scan limits of the measurement vendor is established and second, the process weight response to slice moves across the width of the paper machine is determined and the scan data is mapped to the responses.
This procedure provides a good starting point for the alignment before beginning response tests. This information should be obtained before the shutdown to install the Dyna-Step actuators.
Determine the outside scan limits for the center of the weight gauge window. Make a permanent inscription on the scanner frame for each outer edge scan limit. This provides an easy reference for when the measurement vendor changes the scan parameters causing poor CD control.
Measure the scan width and measure the sheet width. Measure the distance from scan edge to sheet edge for both edges.
Measure the sheet width at the couch and determine the sheet shrinkage from the couch to the scanner.
This procedure is existing in manual written by Creighton.
The most accurate method for alignment of weight measurement data to slice actuators is matching the weight response to movement of slice actuators. Because of random errors in each response test 20 to 40 response tests are required for an accurate alignment. Much care should be exercised to minimize deteriorating profiles while performing response tests. Selecting areas of the sheet with high weight and moving the slice down or low sheet weight and moving the slice up will allow you to obtain the data required for an accurate alignment while not causing any reject production.
Set the scan count to 7, MD filter to 0.4, and the delta displacement clamp to 6 mils.
Place the control in "LOCAL".
Select one or two slices to move. If two, the slices should be at least 10 slices or 60 inches apart.
With one scan to go on the scan count, move the slices for the response test about 3.0 mils.
Once the scan count gets to 4 scans to go, check the weight response, Note the data boxes showing the response and estimate the center point of the response. Record the center point of the response. If the response is to small then make larger slice moves for the next test.
To evaluate the data, think of the data boxes as a unit of linear measure to estimate the data box positioning and record the data box position. The method for estimating the center point of the response in data box position is described below.
data boxes : 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8 : 9 :
refer to no. below 1 234 5 6 7
Viewing the scale on the CDOp station to determine the data box position it should be determined for the above examples 1-7 as follows:
1. Position 1.0
2. Position 1.5
3. Position 1.75
4. Position 2.0
5. Position 2.5
6. Position 3.25
7. Position 4.0
Repeat the response test when at one scan to go until there is sufficient data to adjust the alignment. Adjust the scan width and center line off set so the center of the weight responses are centered over the slices moved.
The purpose of slice smoothing and CD position filtering is to avoid over-controlling slices and creating a sawtooth in the slice position profile and the weight profile. (For additional discussion on the causes of sawtooth refer to the Dyna-Step Troubleshooting Guide.) There are three types of CD filtering in the Dyna-Step control; slice smoothing, first order CD slice position filtering, and first order CD weight error filtering.
Slice smoothing is a type of CD slice position filtering which averages the position of the slice with the position of each adjacent slice and compensates the requested slice move Based on this filtering. The purpose is to cause the slice position to be close to the position of the adjacent slices. The amount of smoothing can vary with the standard deviation of the weight profile. Smoothing can be exempted from any number of slices on either edge to obtain the desired edge control.
The best amount of slice smoothing is determined by trial and error. However, the following guidelines should provide some starting points for setup data.
WEIGHT RANGE OF PAPER { # PER 3000 }15-40 40-65 65-95 95+
SMOOTHING K .01-.05 .04-.12 10-.16 10-.16
STD. DEV. .08-.1 .08-.12 10-.14 12-.30
POWER M .75 .75 1.0 1.0
Cross direction slice position filtering is a first order filter applied to the slice position filtering and smoothing is very small the affect of smoothing and CD position filtering is nearly the same. The only differences in how the two affect control is:
1. Smoothing can be exempted from any number of slices at either edge.
2. Smoothing varies with the CD weight variability. The better the CD weight profile the less smoothing which is applied depending tuning parameters.
Smoothing and CD position filtering can be used jointly to apply a base load of CD filtering to all slices and a variable amount of smoothing to all but a few slices on each edge. This combined with reducing the gain at the edges and modifying the alignment using logical widths at the edges is a very effective method to obtain excellent edge control.
Double filtering is a cross direction weight error filter. This is a first order filter applied both to the left and to the right of each slice. This is usually not used.
The machine direction filter is a first order filter applied for each databox of incoming data from the link, An MD filter of 0.3-0.4 is typically used to adequately filter out noise and short term MD variations which change too rapidly to be controlled by manipulating slices. The scan count should also be changed when a change is made to the MD filter. It is desirable, but not always possible, to receive an unfiltered profile over the link.
To determine the number of scans between control moves (scan count) the MD filter should first be selected based on MD and CD variability. The number of scans should allow two scans for transport lag for the control move to be made and for the paper from the control move to reach the scanner and be measured. Additional scans are needed for the MD filter to filter the new data to at least 70 percent new data before making another control move. The following table provides the number of scans needed with different values of MD filter to obtain the desired fraction of new data in the composite for each control move. This assumes two scans are required for transport lag.
Fraction of new data in the filtered profile for a control move when the scan count reaches zero.
MD FILTER
No. Scans:
.15 .20 .25 .30 .35 .40 .45 .50
3 .15 .20 .25 .30 .35 .40 .45 .50
4 .28 .36 .44 .51 .58 .64 .70 .75
5 .39 .49 .58 .66 .73 .78 .83 .88
6 .47 .59 .68 .76 .82 .87 .91 .94
7 .56 .67 .76 .83 .88 .92 .95 .97
8 .62 .74 .82 .88 .92 .95 .97 .98
9 .68 .79 .87 .92 .95 .97 .98 .99
10 .73 .83 .90 .94 .97 .98 .99 .99
11 .77 .87 .93 .96 .98 .99 .99 1.00
12 .80 .89 .94 .97 .99 .99 1.00 1.00
Logical slice groups are used primarily to adjust the alignment at the edges of the sheet to compensate for edge affects on the fourdrinier. It is easiest if you avoid adjusting the very edge slices as this causes alignment of all slices to shift making the adjustment somewhat difficult. To determine how to adjust the edge slice alignment response tests are needed at the sheet edges to determine how the process responds to slice moves. Next, operate these slices in manual to determine the best slice-to-weight control.
The logical widths are then used to adjust alignment so the automatic control closely matches the control which works best in manual.
The slaving and gain reduction control is used to provide flexible slice control for the edge slices. The setup is explained on the CDOp station or PC. The options are listed below:
1. Reduced gain for either edge.
2. Slave the edge slices to another slice for control moves.
3. Reduce the gain by some fractional value for either edge.
4. Any number of slices at either edge can be grouped together for control.
5. Each edge is set up independent of the opposite edge.
Before one begins to try to troubleshoot a problem that has been portrayed as a Dyna-Step control problem is actually CD profile related, or is actually inherent in the MD variations. This determination could save the technician many hours of fruitless effort in trying to find a problem that really is not there.
It is most easily established which of the two machine variations is contributing to the control problem by obtaining a profile printout from the host system in intervals of about two minutes over a time period of 30 minutes (15 profiles) with the Weight Control system in manual control.
If, upon examination of the printout, the profiles differ significantly over the time period of 5 to 10 minutes, the problem is with the MD variation. If there is no significant difference in the profiles, it is important to emphasize that no conclusion should be drawn about the location of the problem until the following procedure is executed:
1. Note the Standard Deviation as displayed by the Impact System CD operator station.
2. Then change the value of the MD filter constant in the set up data from 0.3 - 0.4 to 0.1.
3. Observe the value of the Standard Deviation again.
4. If the value of the Standard Deviation is reduced by 30% or more, then the control problem is with the MD variations and not the CD variations.
Numerous areas of a paper machine from the stock prep area to the headbox can be identified as a source of MD variations. Here are but a few of them:
1. Headbox deflection controls.
2. Cavitation in any stock lines near the headbox. Check for line vibration.
3. Poor level control of the wire pit silo.
4. Poor pressure control of the air pad for an air padded headbox.
5. Unstable fan pump speed or unstable stream flow valve.
6. Surging of the stuff box.
7. Unstable thick stock flow.
8. Unstable consistency control after the machine chest. Eliminate this control loop if possible.
9. Poor level control in the stock preparation system.
10. Poor mixing of any stock into the white at the fan pump suction.
11. Poor mixing of any additives or fillers into the white water or stock. (Especially pay attention to retention or drainage aids).
12. Anything that can cause an instability in fiber flow, water flow, or additive flow to the headbox.
13. Anything that can cause a pressure change in the headbox.
14. Headbox rectifier rolls.
Do not merely look at the trend plots on the host system and conclude the system is stable. an oscillation with a 5 second duration will average out over a 30 to 60 second scan time.
Possible sources of trouble include the following:
1. Over-control creating a sawtooth shaped weight and slice position profile.
2. Edge control problems from the deckle.
3. Nonuniform CD drainage from dirty foils, worn drainage elements, or a worn wire.
4. Mechanical problems at or near the headbox slice.
To isolate between the various possible sources of trouble, follow this procedures:
1. Eliminate the possibility of over controlling by creating a sawtooth profile by significantly increasing the amount of smoothing and/or double filtering. Then let the system make several control moves.
2. Talk to the Machine Tender and find out what he knows about his machine. Ask if they ever clean the foils and if they ever cleaned the foils before the automatic CD control was installed. How old is the wire? Was the worsening in performance gradual or sudden? Has the measurement system vendor performed any work recently that could change alignment.
3. Get the mill to clean the foils.
4. Perform about 10-20 bump tests to characterize the weight response. Is the mapping correct based on response tests? How wide is each response? Do you always get a response?
5. If the mapping is not correct then adjust the scan width, shrinkage, or offset as needed. Check the host system scan limits to be sure they are the same as when the system was first installed.
6. Heavy weight paper, such as linerboard, will have a very wide response of as wide as 5-6 ft. This requires significant CD weight error filtering (0.5-0.7) and CD position filtering.
7. Light paper usually requires no CD weight error filtering and moderate CD position filtering.
8. If you get no response to a slice move, be certain that the actuator dial indicator reading has confirmed a slice position change. Physically check the actuator and all actuators for proper operation.
9. If the actuators work and no weight response is shown, then repeat the bump test of say 4 mils until you get a response.
If once you get a response and the magnitude is typical of this paper machine then this position has slop between the actuator and slice lip. If once you get a response it is several times what you expected then the there is binding at the connections from the slice rod to the slice lip.
NODE 29 SETUP DATE:
SETUP: 29 :PATH COUNT **< 1 >**
SETUP: 29 :PATH A **< 000 >**
SETUP: 29 :INPUT FLT SCALE **< 01.000 >**
SETUP: 29 :DW REL. DEV. **< 1.0000 >**
SETUP: 29 :SYSTEM GAIN **< 004.000 >**
SETUP: 29 :SCAN LEFT BOX **< 060 >**
SETUP: 29 :SCAN RIGHT BOX **< 001 >**
SETUP: 29 :RS SCAN WIDTH **< 00263.000 >**
SETUP: 29 :SCAN DATA BOXES **< 060 >**
SETUP: 29 :WANT AUTOMATIC CLASS SELECTION **< 1 >**
SETUP: 29 :NUMBER OF CLASSES **< 3 >**
SETUP: 29 :CURRENT CLASS **< 0 >**
SETUP: 29 :WANT SMOOTHING **< 1 >**
SETUP: 29 :NUM LEFT ZONES W/O SMOOTH **< 00 >**
SETUP: 29 :NUM RIGHT ZONES W/O SMOOTH **< 00 >**
SETUP: 29 :CAMERA EDGE DETECT? **< 0 >**
SETUP: 29 :ACT WAIT SECS **< 0030 >**
SETUP: 29 :MINUTES BTWN SCANS **< 0005 >**
SETUP: 29 :REMOTE OVER-RIDE **< 0 >**
SETUP: 29 :WANT COMPOSITE POSITION **< 1 >**
SETUP: 29 :WANT DBLFLT OUT **< 0 >**
SETUP: 29 :WANT ERROR SMOOTHING **< 0 >**
SETUP: 29 :RESTART SCANS **< 02 >**
SETUP: 29 :BAL. CORRECTION **< 0.20 >**
SETUP: 29 :D-BAND INTEG. FAC **< 0.00 >**
SETUP: 29 :WANT PK-PK AVG? **< 0 >**
SETUP: 29 :WANT FLT DRY WT? **< 1 >**
SETUP: 29 :DISPLAY SCANS TO GO? **< 1 >**
SETUP: 29 :A: K-SHR **< 0.961 >**
SETUP: 29 :A: CLASS-TGT **< 026.000 >**
SETUP: 29 :A: CLASS DELTA **< 15.000 >**
SETUP: 29 :A: CLASS SCANS **< 06 >**
SETUP: 29 :A: MD FILTER **< 0.350 >**
SETUP: 29 :A: DBL FLT FAC **< 0.990 >**
SETUP: 29 :A: CENTR OFFST **< 0003.000 >**
SETUP: 29 :A: SMOOTHING K **< 000.0100 >**
SETUP: 29 :A: STD DEV O **< 0.100 >**
SETUP: 29 :A: POWER M **< 00.750 >**
SETUP: 29 :A: GAIN **< 00.400 >**
SETUP: 29 :A: MATRIX C1 **< 0.000 >**
SETUP: 29 :A: MATRIX C2 **< 0.000 >**
SETUP: 29 :A: MATRIX C3 **< 0.000 >**
SETUP: 29 :A: MATRIX C4 **< 0.000 >**
SETUP: 29 :A: MATRIX C5 **< 0.000 >**
SETUP: 29 :A: NUM LOG GROUPS **< 5 >**
SETUP: 29 :A: END SLICE ZONE **< 01 >**
SETUP: 29 :A: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :A: GROUP OFFSET **< 0000.000 >**
SETUP: 29 :A: END SLICE ZONE **< 03 >**
SETUP: 29 :A: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :A: GROUP OFFSET **< -0001.000 >**
SETUP: 29 :A: END SLICE ZONE **< 48 >**
SETUP: 29 :A: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :A: GROUP OFFSET **< 0000.000 >**
SETUP: 29 :A: END SLICE ZONE **< 50 >**
SETUP: 29 :A: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :A: GROUP OFFSET **< 0000.000 >**
SETUP: 29 :A: END SLICE ZONE **< 51 >**
SETUP: 29 :A: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :A: GROUP OFFSET **< 0000.000 >**
SETUP: 29 :A: WANT MST BIASING **< 0 >**
SETUP: 29 :A: MOIST SCALE **< 1.000 >**
SETUP: 29 :A: WANT SLAVING/GAIN REDUCTION **< 6 >**
SETUP: 29 :A: NBR OF SLAVED LEFT ZONES **< 01 >**
SETUP: 29 :A: LEFT FRACTION **< 0.300 >**
SETUP: 29 :A: NBR OF SLAVED RIGHT ZONES **< 01 >**
SETUP: 29 :A: RIGHT FRACTION **< 0.300 >**
SETUP: 29 :B: K-SHR **< 0.961 >**
SETUP: 29 :B: CLASS-TGT **< 045.000 >**
SETUP: 29 :B: CLASS DELTA **< 04.200 >**
SETUP: 29 :B: CLASS SCANS **< 06 >**
SETUP: 29 :B: MD FILTER **< 0.350 >**
SETUP: 29 :B: DBL FLT FAC **< 0.990 >**
SETUP: 29 :B: CENTR OFFST **< 0003.000 >**
SETUP: 29 :B: SMOOTHING K **< 000.0100 >**
SETUP: 29 :B: STD DEV O **< 0.100 >**
SETUP: 29 :B: POWER M **< 00.750 >**
SETUP: 29 :B: GAIN **< 00.400 >**
SETUP: 29 :B: MATRIX C1 **< 0.000 >**
SETUP: 29 :B: MATRIX C2 **< 0.000 >**
SETUP: 29 :B: MATRIX C3 **< 0.000 >**
SETUP: 29 :B: MATRIX C4 **< 0.000 >**
SETUP: 29 :B: MATRIX C5 **< 0.000 >**
SETUP: 29 :B: NUM LOG GROUPS **< 3 >**
SETUP: 29 :B: END SLICE ZONE **< 01 >**
SETUP: 29 :B: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :B: GROUP OFFSET **< 0000.000 >**
SETUP: 29 :B: END SLICE ZONE **< 03 >**
SETUP: 29 :B: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :B: GROUP OFFSET **< -0001.500 >**
SETUP: 29 :B: END SLICE ZONE **< 51 >**
SETUP: 29 :B: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :B: GROUP OFFSET **< 0000.000 >**
SETUP: 29 :B: WANT MST BIASING **< 0 >**
SETUP: 29 :B: MOIST SCALE **< 1.000 >**
SETUP: 29 :B: WANT SLAVING/GAIN REDUCTION **< 6 >**
SETUP: 29 :B: NBR OF SLAVED LEFT ZONES **< 01 >**
SETUP: 29 :B: LEFT FRACTION **< 0.300 >**
SETUP: 29 :B: NBR OF SLAVED RIGHT ZONES **< 01 >**
SETUP: 29 :B: RIGHT FRACTION **< 0.300 >**
SETUP: 29 :C: K-SHR **< 0.961 >**
SETUP: 29 :C: CLASS-TGT **< 053.000 >**
SETUP: 29 :C: CLASS DELTA **< 05.000 >**
SETUP: 29 :C: CLASS SCANS **< 06 >**
SETUP: 29 :C: MD FILTER **< 0.350 >**
SETUP: 29 :C: DBL FLT FAC **< 0.990 >**
SETUP: 29 :C: CENTR OFFST **< 0003.000 >**
SETUP: 29 :C: SMOOTHING K **< 000.0100 >**
SETUP: 29 :C: STD DEV O **< 0.100 >**
SETUP: 29 :C: POWER M **< 00.750 >**
SETUP: 29 :C: GAIN **< 00.400 >**
SETUP: 29 :C: MATRIX C1 **< 0.000 >**
SETUP: 29 :C: MATRIX C2 **< 0.000 >**
SETUP: 29 :C: MATRIX C3 **< 0.000 >**
SETUP: 29 :C: MATRIX C4 **< 0.000 >**
SETUP: 29 :C: MATRIX C5 **< 0.000 >**
SETUP: 29 :C: NUM LOG GROUPS **< 3 >**
SETUP: 29 :C: END SLICE ZONE **< 01 >**
SETUP: 29 :C: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :C: GROUP OFFSET **< 0000.000 >**
SETUP: 29 :C: END SLICE ZONE **< 03 >**
SETUP: 29 :C: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :C: GROUP OFFSET **< -0001.500 >**
SETUP: 29 :C: END SLICE ZONE **< 51 >**
SETUP: 29 :C: LOG WIDTH DELTA **< 000.0 >**
SETUP: 29 :C: GROUP OFFSET **< 0000.000 >**
SETUP: 29 :C: WANT MST BIASING **< 0 >**
SETUP: 29 :C: MOIST SCALE **< 1.000 >**
SETUP: 29 :C: WANT SLAVING/GAIN REDUCTION **< 6 >**
SETUP: 29 :C: NBR OF SLAVED LEFT ZONES **< 01 >**
SETUP: 29 :C: LEFT FRACTION **< 0.300 >**
SETUP: 29 :C: NBR OF SLAVED RIGHT ZONES **< 01 >**
SETUP: 29 :C: RIGHT FRACTION **< 0.300 >**
This document describes the operation of the user interfaces to the basis weight controller. The principles of operation are described. The operation of the monitor port as well as the basis weight screens on the CD-OpCenter is outlined. A list of the setup data items appear in appendix G.
The CD-OpCenter has a total of five screens of which three are available to the operator and two are available to the process control engineer. The operator can access the Bone Dry Wt. Profile and the Slice Position Profile by pressing the basis weight system hard-key located in the lower left hand corner of the CD-OpCenter. In general, these are the only screens that the operator will need to preform his duties. However, a Computer requested Slice Move screen can be accessed to verify that the controller is working correctly. In addition, on the upper screen of the CD-OpCenter is a information line indicating the number of scans needed to be received before the next control move will be made. Information on system mode (remote / local) current grade class and cursor zone are displayed on each of the screens.
This screen displays the bone dry weight profile with an arrow cursor to indicate that it is a 'read-only' screen. The only data that can be entered is a valid cursor position to move the cursor. By positioning the cursor to any zone a readout of the dry wt. by that zone can be obtained. From this screen, the 'Slice Position Profile' and the 'Computer Requested Slice Move' profiles can be accessed.
This screen displays the current position of the slice lip. A box cursor can contain one to all of the actuator zones (slices); by entering in values at the 'KYBD :' prompt, a request is made to move the zones within the cursor to the entered value position. The result is to have all of the zones within the cursor's range to move to the same position level. Another method to change the value of the position within the cursor is to press either the up or down arrow. In this case, the value of all actuators will change in the direction of the arrow by the same incremental amount: thus all of the actuators keep their relative position with respect to each other within cursor's range.
Soft keys allow the cursor to be frozen zones to be placed in automatic or manual operation, the system to be placed in either local or remote mode, the cursor to be moved to a particular zone, and the entering of the trim / squirt positions.
The basis weight system can either operate in a local or remote mode. In local mode all of the zones respond only to operator input and not to the remote (computer) input. This has the effect of placing all of the zones into manual operation. While the system is in local mode. The position of the slice lip can be altered from the CD-OpCenter.
Individual slice actuators can be placed into automatic or manual operation. Manual operation can be viewed as forcing the selected zones to be in local system mode: that is, the selected zones will not respond to remote (computer) input. If the zones are in automatic operation mode then they will follow the input of the remote. The position of the slice lip of the cursor zones which are in manual operation can be altered from the CD-OpCenter.
When the trim / squirt position soft-key has been pressed, the 'LTRIM:' prompt is displayed in the keyboard window a left trim / squirt position can be entered: immediately, the 'RTRIM:' prompt is displayed. From the key-pad a right trim / squirt position can be entered. Upon having entered both values, the default keyboard window is displayed. Pressing the recall-status hard-key will display the left and right trim momentarily on the upper screen right after displaying the standard deviation of the last control move dry wt profile and before displaying the number of scans to go.
When the number of 'scans to go' becomes zero, the basis weight controller calculates another control move and sends this as a request to the basis weight actuator controller. The request is in the form of a profile containing desired movement of actuators. The CD-OpCenter also receives the profile and displays it. The purpose of this screen is allow comparison of requested computer actuator moves to the bone dry weight profile: one can easily determine if the requested moves are trying to correct the high and low places of weight.
This screen is 'read-only'; thus, it has an arrow cursor. By entering an integer of a valid cursor zone via the key-pad: the value appears in the keyboard window at the 'goto :' prompt. Pressing the hard-key 'enter' will cause the cursor to move to the selected zone. See appendix A.
'Bone Dry Wt. Target Profile' displays the current target profile and permits editing of any of the possible target profiles. Possible target profiles include the current target profile and any of the grade class target profiles. The current target profile resides in RAM (random access memory which is volatile memory) and is the target that the basis weight controller will use for control. However, the grade class target profiles are stored in EEPROM (electrically erasable programmable read only memory) which is non-volatile memory.
The current target will be requested whenever the 'Bone Dry St. Target Profile' screen is displayed (i.e. the bone dry wt. profile soft-key is pressed). A 'WAITING FOR PROFILE MESSAGE...' is displayed on the center line exis while the CD-OpCenter waits for the current target profile to be received: when it is received, the profile is graphed and the message disappears. The current target can also be requested by pressing the 'Get Current Target' soft-key on the 'Bone Dry Wt. Target Profile'.
Grade class (permanent) targets can be requested from the basis wt. controller by pressing the 'Get Permanent Target' soft-key. When the soft-key is pressed. a message is flashed on the upper screen to enter a target number: also, the prompt in the keyboard window changes to 'TGT :'. If the entered target number is valid then the system requests the permanent grade class target from the basis wt. controller: on the other hand, if it is not a valid target number then an error message of 'INVALID INPUT' is flashed on the upper screen and the keyboard window prompt changes back to 'KYBD :'. For a description of a valid target see appendix D.
In order to make the displayed profile the current target, the operator must press the "Save To Current Target' soft-key. When pressed, the CD-OpCenter sends the target to the basis wt controller to be used temporarily as the target for control. This target will be used until a grade change occurs.
Similarly, to save the displayed profile to one of the permanent grade class targets, the operator must press the 'Save To Permanent Target' soft-key. Again, a message to enter the target number is flashed on the upper screen and the keyboard window prompt is changed to 'TGT :'. Upon entering a valid grade class target number, the displayed target is sent to the basis wt. controller and is saved permanently in the EEPROM. Whenever a grade change occurs, the permanent target for the new grade class is copied to the current target. Saving the displayed target to the same permanent grade class target as the grade class that is being controlled will not cause it to be copied to the current grade target.
Other soft-keys are 'Move Cursor To Zone' (see appendix A), 'Cursor Freeze / All / One' (see Appendix C, and Process Control (see appendix B).
In general, listing internal or external arrays can be done by typing in the two identifying with an optional index and count parameter.
Example: bwc> ip [index] [count]<CR>
If no parameters follow the identifier then the default values for index (1) and count (10) are used; the array values with indices from 1 to 10 are listed in tabular form. However, if only one parameter is specified then it is taken to be an index. In this case, array values are listed from that index to the end of the array inclusively. When both parameters are listed, the array is listed from the index to for count indices. Now when a non-existent index is entered, the default index and count are used. If an invalid count is entered then it will act as if none was given at all (see above).
List variables, setup data, and golden copy identifiers
Commands in this group list the state of various internal variables. The "va" lists many of the current variables for the current grade class. Setup data can be displayed by entering the command "sd"; the command without any parameters gives a summary of the setup date currently being used. However, if an integer is entered as a parameter, e.g. bwc> sd 1, then the setup data for the particular grade class will be displayed. In the case where the grade doesn't coincide with a valid grade class, the message "Grade class does not exist". appears on the screen, see appendix D. Golden copy identifiers are the integers associated with information passed in the network that concerns the basis wt. controller, see appendix E.
The diagnostic commands aid in determining alignment and viewing the operation of the controller. In order to check on the alignment, three commands are provided; they are MA (map analysis), LW (logical widths), and DW (databox widths). Map analysis does an independent calculation of the weight that is supposed to be in a particular databox and compares it to the value that results from the mapping function. Logical widths and databox widths can be used to visualize the effects of using logical widths.
The remaining functions allow the setting of breakpoints, using BP, of tasks, listed by TS, which can be singled stepped using the SS command. All breakpoints can be cleared or set with the BA command. A GO command will cause execution until the next breakpoint is encountered. To reset the task list execution, as RE command can be executed.
Tracking of errors can be done one of two ways; the first is to logical them in a history array; The AG command (auto grade) lists the history, by time and date, of grade changes and the manner in which the change took place. Secondly the arrays can be dumped to a printer on every control move using the DP, dump to printer, and the PD command, print dump. The difference between the two of these commands is the format in which the dump of arrays to the monitor port is performed, the print dump will print the arrays in a tabular format and the dump print command will print the data in a quattro (r format.
A detailed description which is an excerpt from the CD Net2 specification is provided in appendix I.
In this group the commands of plotting a profile, listing CD-OpCenter basis wt options, getting help. and exiting the interface, An example of the plotting command is given in appendix F. The command that lists the CD-OpCenter options produces a print-out of all the commands that can be issued from the CD-OpCenter. Appendix F also has such a listing. If the EX command is given them the basis wt. diagnostic interface ends and a "$" prompt reappears. Of course, the HE command lists all of the possible commands that will be accept from the monitor port.
On some screens the keyboard box has a "goto :" prompt which will accept key-pad numerical entry to specify the zone to move the cursor. On other screens, a soft-key must be pressed to get the "goto :" prompt appear. If enter is pressed without entering a valid zone number then the cursor will stay at it present location and either keep the goto-prompt as in the first case or it will replace it with the default keyboard. If a non-existent zone is specified than the cursor will not move and a "INVALID ENTRY" message will flash on the upper screen of the CD-OpCenter. However, when a valid zone number is entered, the cursor will move to the specified zone and update all of the zone information under the screen.
Pressing the "Process Control Access" soft-key causes the "process Control Access" screen to appear with a prompt to enter in the access code. The access code is always the version number of the CD-OpCenter software. If the number is entered correctly, then the screens available to the process control personnel can be accessed. Currently, the screens to the "Bone Dry Wt. Target Profile" and "Slice Position Change Profile" can be accessed. Additionally, the current grade class can be changed from a soft-key selection, The "Process Control Access" screen also displays the currant grade class in use.
If the screen is either the "Bone Dry Wt. Target Profile" or the "Slice Position Change Profile" then pressing the "Process Control" soft-key will return the process control engineer to the "Process Control" screen.
If the screen has a box cursor then it has the ability to be "frozen". When a cursor is frozen, by pressing the soft-key once, it can be expanded to cover more than one zone; also, the zone numbers of the left and right sides are displayed. As the cursor expands around the current zone, via pressing the left and right arrow keys. To rapidly collapse the cursor to one zone, press the soft-key once more after it has been expanded to cover all the zones.
A Valid grade class/target is determined by the number of grade classes entered into the basis weight controller when it was being setup. Grade class A corresponds to a value of 0, grade class B corresponds to a value of 1, etc; there fore, if there are three grade classes then values of 0, 1, and 2 only are possible valid for a grade class/target.
Moisture system
LINK SLICE 10001 moisture profile from the link.
Basis weight actuator
controller
BW_NUM_SLOS_ID 2000 number of slice rods
BW_SLC_WDTH_ID 2001 array of float slice widths
BW_CMPTER_BTAT 2002 condition of actuator computer
BW_SLC_STAT_ID 2003 array of condition of each slice
BW_MANUAL_ID 2004 auto/manual array received
BW_MODE_ID 2005 local/remote
BW_DELTA_SETPT 2006 computer delta displacement setpts
BW_POS_SPT_ID 2007 operator abs. displacement setpts
BW_WIRE_SPD 2008 measured wire speed
BW_DEADBAND 2009 not used
BW_TOTAL_HEAD 2010 measured total head
BW_SLC_OPENING 2011 measured slice opening
BW_JET_SPEED 2012 measured jet speed
BW_UNITS 2013 metric in use
BW_LANGUAGE 2014 language type
Basis weight controller
BW006 12000 bw_slices, rec'd from the link
B_LINK_SLICE 12001 weight profile received from link
BW_BOXES 12002 data boxes after calc_dry_wt()
BW_ZONES 12003 dry weight profile at slice rods
BW_CURRENT_TUN 12005 current control tuning constants
BW_CTUNING 12006 a set of tuning constants
BW_SEL_TUNING 12007 current selected tuning constant
BW_CURRENT_TGT 12008 current used CD target profile
BW_CTARGET 12009 a set of CD target profiles
BW_SEL_TARGET 12010 currently selected target profile
BW_L_SLICE 12012 weight alignment left slice
BW_R_SLICE 12013 weight alignment right slice
BW_OFFSET 12014 weight alignment offset
BW_TSW 12015 weight alignment total slice width
BW_SCANS 12016 scans received
BW_STD_DEV 12017 standard deviation
BW_OPTIONS 12018 option e.g. list options
BW_NET_OLS 12019 current cls & number of grade cls
BW_LOGICAL WDTH 12020 logical slice widths for the CD-Op
BW_SQUIRT 12021 edge squirt (trim) locations
BW_POSCHG 12022 position change profile
BW_NET_GRADE 12023 network grade id
BW_MD_TGT 12024 network MD target
Listing of Internal & External Arrays :---------------------
IF items <CR> -- Input Profiles
AD items <CR> -- all ARrays
HA items <CR> -- all History Arrays
HM items <CR> -- Headbox Mapping arrays
ER items <CR> -- output ERror arrays
OW items <CR> -- OUtput decoupled array
PO items <CR> -- POsition change output
DO items <CR> -- output decoupled array vs. dblo_val array
MI items <CR> -- Matrix Inverted
MC <CR> -- Matrix Co-efficients
List Variables, Setup Data, & Golden Copy ID;s :------------
VA <CR> -- lists current target VAriables of most interest
SD [1] <CR> -- print Setup Data, '1' :print long form
ID <CR> -- print all I>D>s associated with this mode.
Diagnostics :-----------------------------------------------
MA zone <CR> -- Map Analysis
LW items <CR> -- Logical Widths
DW items <CR> -- Databox Widths
RV <CR> -- ReceiVed moisture & basis wt flags set
FI <CR> -- FI11 moisture & basis wt input arrays
BA 1:set all |0:clear all <CR> -- Break point All set/clear
BP [number 1|0] <CR> -- BreakPoint number 1:set|0:cleared
SS <CR> -- Single Step
RE 1:hist:|2:array <CR> -- REset: task, main_prog is active
GO <CR> -- GO after breakpoint
TS <CR> -- Task State
Tracking Errors :-------------------------------------------
AG [<CR>|1 <CR>] -- Auto Grade history, '1' resets history
TI [<CR>|1 <CR>] -- print TIme | print local/remote history
DA <CR> -- Dump Arrays to printer (calls print_dump() now)
PD number 1:on|0:off <CR> -- Printer Dump toggle
DP number 1:on|0:off <CR> -- DiagnosticPrinter toggle
Network Functions :-----------------------------------------
DU <CR> -- Dumps this mode's Session
LI mode <CR> -- LIsts ID's common to this mode & "MODE"
NO <CR> -- lists the NOdes currently on the net
PA <CR> -- list the PAths with connections to this mode
ST <CR> -- STops the read function
WH <CR> -- print WHich mode this is
RD id index count rate <CR> -- ReaDs id index, for count items, at rate/sec
Miscellaneous :---------------------------------------------
PL[screen_no] <CR> -- PLot the screen
LO <CR> -- List Options
HE <CR> -- HElp lists this menu
EX <CR> -- EXits from the diagnostic
Fill Input array example:
bw=\ fi<CR>
FI requires a 0 to 13 parameter
FI 0 clear the input arrays
FI 1 fill the actuator position array
FI 2 set the machine down timer
FI 3 clear the automatic fill function.
FI 4 set auto_fill on: grade_tgt = 40.5
FI 5 set auto_fill on: grade_tgt = 54.5
FI 6 set auto_fill on: grade_tgt = 63.5
FI 7 set auto_fill on: grade_tgt = 72.5
FI 8 set auto_fill on: grade_tgt = 84.0
FI 9 set suto_fill on: grade_tgt = 125.0
FI 10 fill bw_slices & mst_slices arrays with approx. 54.5
FI 11 fill bw_slices & mst_slices arrays with approx. 72.5
FI 12 fill/map the bw_slices & mst_slices with approx. 54.5
FI 13 fill/map the bw_slices & mst_slices with approx. 72.5
1: Local / Remote history: 'TI 1'
2: List Variables: 'VA'
3: Output Arraya: 'OU 1' dry_arr_gain[], hd_zn_dp[], ppp[], decoup_disp[], actuator_pos[]
4: Output Position: 'PO 1' test_output[], oldd_pos[], pos_chg[], auto/man[]
5: Output Error: 'ER 1' map_output[], dry_err_gain{}, error_avg{}, comp_pos[], d_zn_dp[]
6: List Setup Data: 'SD'
7: Print all of the I.D.s associated with this mode
8: List Inverted Matrix: 'MI items'
9: List Matrix Ccefficients: 'MC'
10: Turn OFF|ON Print Dump: 'PD 011'
11: Auto Grade Selection Failure Log: 'AG'
20: Print diagnostic S-type message for DRY_WT_BOX[].
21: Print diagnostic S-type message for POSITION[].
22: Print diagnostic S-type message for DRY_WT[] & POSITION[]
23: Fill act_pos[] and the input arrays. Do 'RV' cmd to fill Dry_Wt[]
24: Fill act_pos[] and the input arrays and does 'RV' cmd to fill Dry_WT[].
25: Set statreg.diag_prnt
26: Clear statreg.diag_prnt
30: Plot Bone Dry Wt. Profile
31: Plot Slice Position Profile
32: Plot Computer Requested Move Profile
33: Plot Actuator Position Change Profile
99: List Options: 'LO'
Plot example (1):
bwc> PL<CR>
PL 0 Plot the Bone Dry Wt. Profile
PL 1 Plot the Slice Position Profile
PL 2 Plot the Computer Rewuested Move Profile
PL 3 Plot the Actuator Position Change Profile
PL 1 Plot the Dry Wt. by Databox Profile
This value scales the profiles received from the link. For example, 80# paper profiles received from the link typically have an average value of 545 for raw stock basis weight and 23 for moisture. A typical value for the input filter scaling is 0.1 which when multiplied by the profile values produces values of 54.5 and 2.3 for raw stock basis weight and moisture, respectively.
This number is the maximum absolute percentage that the calculated dry weight of a zone can vary from the average before it is considered invalid. In such an unlikely event. the deviant zone is set to the average of the two adjacent zones.
System gain is the amount of movement of a slice rod actuator to produce a change in the dry weight.
The scanner's left data box is the data box under zone 1 (first slice rod) of the head box. This tells the system the alignment of the scanner to the head box on the left side.
The scanner's right data box is the data box under the right most zone (last slice rod) of the head box. This tells the system the alignment of the scanner to the head box on the right side.
Scanner width is the total length of the scanner in either inches or centi-meters (metric units must be set in the basis wt. actuator controller for centi-meters to be metered). This is the length of the total number of scanner data boxes.
The total number of data boxes of the scanner that comprise the scanner width.
Entering a 1 enables this option and causes the system not to prompt for a selected grade class because it will automatically select the grade class. If a 0 is entered then automatic grade class selection is disabled and the class to be used will be entered in later.
A maximum of five grade classes can be entered. Each grade class will have its own set of setup data for tuning the system for that particular class requirements.
Entering a 1 enables the error profile to be smoothed through filtering entering a 0 will disable smoothing.
If smoothing is selected, then setup data prompts for any zones that are to be exempt from smoothing at the left edge (the one near zone 1).
If smoothing is selected, then setup data prompts for any zones that are to be exempt from smoothing at the right edge (the one near the last zone on the right side of the bead box).
The class coefficient of shrinkage is the percentage amount that the sheet shrinks between the couch roll and the scanner.
The class target is the targeted average of the basis wt profile received from the link after scaling.
The class delta is the absolute variance from the class target that a received profile's average can vary and still be considered within the grade class. This is the change, plus or minus, that establishes the range over which a grade class spans.
The class scans is the number of scans to wait before making another control move.
A double filter factor controls the amount of filtering which removes high frequency components from the profile. A large filter factor gives little filtering whereas a small filter factor causes a lot of filtering to occur; filter factors can be in the range of 0 to 1.
The class offset is the amount that the scanner is shifted, left or right, from the head box. A positive offset means that the scanner has been shifted to the left; a negative offset indicates a shift to the right. This is the amount of shifting in relation to a reference line that runs through the centers of both the head box and the scanner.
This is the smoothing constant K that is used in the smoothing filter.
This is the variable M that is used in the smoothing filter. Mis used as an exponential and therefore is titled Power M.
The class gain is the gain factor that scales the system gain for a particular grade class.
Class matrix coefficients are used in the decoupling matrix. They represent the slice to slice interaction. This is the default configuration.
The head box can be logically viewed as being composed of many smaller head boxes or groups of zones; in fact, the head box can be decomposed into as many as five groups and as few as one. Each group will have its own offset.
Group slice width delta is the amount that distance between slice rods can be logically changed (made larger or smaller); therefore, the delta can be either positive or negative. The value entered is a delta and thus must be only the amount the distance is changed and not the final distance that the slice rods are to be spaced apart.
The class group offset is the amount that each group can be logically shifted either to the right or left.
This setup data item allows the controlling of the dry weight by allowing some portion of the moisture profile as dry weight. Generally, this is not desired.
Each class can select whether basis weight or dry weight is being received from the link. If the factor is a 1 then the link is assumed to be sending basis weight profiles; if the factor is a 0 then dry weight profiles is assumed. A factor between 0 and 1 means that the profile received from the link is a mixture of dry weight and basis weight. Generally, this value will always be a 1.
One of nine possible entries can be made here; however, there are two distinct types of choices. The first is whether to slave a zone or group of zones to another zone and the second is whether to just move the end zones as a percentage of the calculated move. This selection option is prompted as want slaving/gain reduction because the first case is one where some zones are slaved to others and in the second case, moving the zones a fractional part of the calculated move is the same as reducing the gain for those zones.
Entering a zero disables any slaving or gain reduction. If a 1 or 2 is entered then either the left or right zones(s), respectively, only are slaved: entering a 3 causes slaving at both ends. However if a 4 or 5 is entered then gain reduction is occurs at the left or right end zones, respectively and entering a 6 causes gain reduction to occur at both ends. To get a mix of slaving or gain reduction enter either a 7 which causes the left end to be gain reduced while the right end is slaved and entering an 8 causes just the opposite.
If the slaving/gain reduction was selected (a non-zero entered) then the fractional part of the slaved or gain reduced zone(s) must be entered here.
In case slaving/gain reduction has been selected, the number from each end is to be entered; this imp[lies that the slaved/gain reduced zones are contiguous from the vary end zone on either side.
A fractional part of the class slaved to zones' output move becomes the output for the slaved zone(s). In other words, if zones X and Y are slaved 50% of zone Z's output move than X and y's output move will be half of Z's output move.
The maximum time to wait for the actuators to move after an move output to them is specified by the actuator wait seconds. With Dyna-Step, the actuators will complete all of their moves within a few seconds therefore a time limit of 30 seconds should be sufficient.
In the case where a profile has not been received within the minutes between scans time limit. The controller will reset the number of scans to the maximum limit and wait for those scans to be received before making another control move.
This is a safety feature that will prevent the controller from making any control moves regardless of the state of the ones (whether the zones are in auto or manual mode) and regardless of the state of the system (whether the system is local or remote). An example of when this feature might come into play is when new software has been installed and the Impact engineers want to verify that it is working correctly before allowing it to actually make control moves. In that case the over-ride will be enabled (a 1 entered ) thus preventing the operator, who might be unaware of the reason that the system is in local, from putting the system into remote. When in over-ride mode an alarm message is posted on the CD-OpCenter.
INPUT FLT SCALE
"ENTER THE INPUT FILTER SCALING FACTOR.",
"THIS IS THE SCALING FACTOR TO FILTER THE INPUT PROFILE.",
"USED IN FUNCTION FIRST-ORDER-FILTER",
"THE 'SCALING' IN:",
" E(N) = (1 - K) * E(N-1) + K * SCALING * INPUT",
"VALUES BETWEEN -99 AND 99 ACCEPTED.",
"DW REL. DEV.",
"ENTER THE DRY WEIGHT RELATIVE DEVIATION LIMIT.",
"BACK DATA BOX IS COMPARED TO THE RELATIVE DEVIATION"
" LIMIT: IF THE DEVIATION IS TOO LARGE THEN THE DRY WEIGHT"
" OF THE DATA BOX IS SET TO THE AVERAGE OF THE TWO"
" ADJACENT CHANNELS. THIS IS A FRACTIONAL PART OF THE AVERAGE.",
"VALUES BETWEEN 0 AND 1.00 ACCEPTED.",
"SYSTEM GAIN",
"ENTER THE SYSTEM GAIN."
"THE GAIN MUST BE BETWEEN -100 AND =100.",
"SCAN LEFT BOX".
"ENTER THE LEFT RS SCANNER BATA BOX.",
"THIS IS THE DATABOX ON THE LEFT OF THE RS SCANNER",
" WHICH IS UNDER THE FIRST ZONE (SLICE ROD ACTUATOR).",
"THIS IS USED TO MAP RS SCANNER DATABOXES TO THE HEADBOX ZONES.",
"VALUES BETWEEN 1 AND 256 ACCEPTED.",
"SCAN RIGHT BOX",
"ENTER THE RIGHT RS SCANNER DATA BOX.",
"THIS IS THE DATABOX ON THE RIGHT OF THE RS SCANNER",
" WHICH IS UNDER THE LAST ZONE (SLICE ROD ACTUATOR).",
"THIS IS USED TO MAP RS SCANNER DATABOXES TO THE HEADBOX ZONES.",
"VALUES BETWEEN 1 AND 256 ACCEPTED.",
"RS SCAN WIDTH",
"ENTER THE RS SCANNER WIDTH.",
"THIS IS THE LENGTH OF THE RS SCANNER.",
"VALUES BETWEEN 1 AND 10000 ACCEPTED.",
"SCAN DATA BOXES",
"ENTER THE NUMBER OF RS SCANNER DATA BOXES.",
"THIS IS THE NUMBER OF RS SCANNER DATA BOXES.",
"VALUES BETWEEN 1 AND 256 ACCEPTED.",
"WANT AUTOMATIC CLASS SELECTION",
"SELECT WHETHER AUTOMATIC CLASS SELECTION IS DESIRED.",
"IF THIS OPTION IS ENABLED THEN A VALUE FOR THE CLASS DELTA",
" IS PROMPTED, OTHERWISE, VALUES FOR MANUALLY SELECTED",
" GRADE CLASS ARE USED.",
"0: NO AUTOMATIC CLASS SELECTION.",
"1: AUTOMATIC CLASS SELECTION ENABLED.",
"NUMBER OF CLASSES",
"ENTER THE NUMBER OF GRADE CLASSES.",
"VALUES BETWEEN 1 AND 5 ACCEPTED.",
"CURRENT CLASS",
"ENTER THE NUMBER WHICH INDICATES THE CURRENT GRADE CLASS.",
"0: CLASS A",
"1: CLASS B",
"2: CLASS C",
"3: CLASS D",
"4: CLASS E",
"VALUES BETWEEN 0 AND 4 ACCEPTED.",
"WANT SMOOTHING",
"BASIS WT SMOOTHING DESIRED.",
"IF THIS OPTION IS ENABLED THEN THE SMOOTHING",
" TRANSFORMATION IS PERFORMED AS FOLLOWS:",
" ??????_?????? + K * P''",
"0: NO SMOOTHING.",
"1: SMOOTHING PERFORMED.",
"NUM LEFT ZONES W/O SMOOTH",
"BASIS WT NUMBER OF ZONES ON THE LEFT TO EXEMPT FROM SMOOTHING.",
"ENTER THE NUMBER OF ZONES ON THE LEFT TO EXEMPT F/ SMOOTHING.",
"VALUES BETWEEN 0 AND 70 ACCEPTED.",
"NUM RIGHT ZONES W/O SMOOTH",
"BASIS WT NUMBER OF ZONES ON THE RIGHT TO EXEMPT F/ SMOOTHING.",
"ENTER THE NUMBER OF ZONES ON THE RIGHT TO EXEMPT F/ SMOOTHING.",
"VALUES BETWEEN 0 AND 70 ACCEPTED.",
"A: K-SHR",
"ENTER THE CLASS-A COEFFICIENT OF SHRINKAGE.",
"THIS IS THE CLASS-A SHRINKAGE FACTOR.",
"VALUES BETWEEN -1 AND 1 ACCEPTED.",
"A: CLASS-TGT",
"ENTER THE CLASS-A BASIS WEIGHT TARGET.",
"THIS IS THE CLASS-A BASIS WEIGHT TARGET.",
"VALUES BETWEEN 1 AND 999.999 ACCEPTED.",
"A: CLASS DELTA",
"ENTER CLASS A: ALLOWABLE DELTA AROUND THE SELECTED TARGET.",
"THE DELTA MUST BE BETWEEN 1.000 AND 9.999.",
"A: CLASS SCANS",
"ENTER THE NUMBER OF CLASS-A DRY WEIGHT SCANS.",
"THIS IS THE NUMBER OF CLASS-A DRY WEIGHT PROFILES (SCANS)",
" RECEIVED BEFORE A CONTROL MOVE IS TAKEN.",
"THE NUMBER MUST BE BETWEEN 0 AND 20.",
"A: DBL FLT FAC"
"ENTER THE CLASS-A DOUBLE FILTER FACTOR.",
"THE 'K' IN:",
" E(N) = (1 - K) * E(N-1) + K * INPUT",
"THE FILTER CONSTANT MUST BE BETWEEN 0 AND 1.",
"NOTE: THE 'N-1' IS THE ARRAY'S PREVIOUS INDEX.",
"A: CENTR OFFST",
"ENTER THE CLASS-A CENTER OF PAPER OFFSET.",
"THE OFFSET MUST BE BETWEEN -1000 AND +1000.",
"A: SMOOTHING K",
"ENTER THE CLASS-A SMOOTHING CONSTANT K.",
"THIS IS THE CLASS-A SMOOTHING CONSTANT K.",
"VALUES BETWEEN 0 AND 100 ACCEPTED.",
"A: POWER M",
"ENTER THE CLASS-A POWER M.",
"THIS IS THE CLASS-A POWER M.",
"VALUES BETWEEN 0 AND 10 ACCEPTED.",
"A: GAIN"
"ENTER THE CLASS-A GAIN.",
"THIS IS THE CLASS A GAIN FACTOR.",
"VALUES BETWEEN -100 AND 100 ACCEPTED.",
"A: MATRIX C1",
"ENTER THE CLASS-A MATRIX COEFFICIENT C1.",
"CLASS-A COEFFECIENT C1.",
"VALUES BETWEEN -1 AND 1 ACCEPTED.",
"A: NUM LOG WIDTHS",
"ENTER THE CLASS-A NUMBER OF LOGICAL WIDTHS.",
"THIS IS THE CLASS-A NUMBER OF LOGICAL WIDTHS.",
"VALUES BETWEEN 1 AND 5 ACCEPTED.",
"A: LOG WIDTH DELTA",
"ENTER THE CLASS-A LOGICAL SLICE WIDTH DELTA.",
"THIS IS THE CLASS-A LOGICAL SLICE WIDTH DELTA.",
"VALUES BETWEEN -100 AND 100 ACCEPTED.",
"A: END SLICE ZONE",
"ENTER THE CLASS-A END SLICE ZONE.",
"THIS IS THE CLASS-A END SLICE ZONE.",
"VALUES BETWEEN 1 AND 72 ACCEPTED.",
"A: GROUP OFFSET"".
"ENTER THE CLASS-A GROUP OFFSET.",
"THIS IS THE CLASS-A GROUP OFFSET.",
"THE OFFSET MUST BE BETWEEN -1000 AND +1000.",
"A: WANT MST BIASING",
"CLASS a: SELECT IF MOISTURE BIASING IS DESIRED.",
"O: MOISTURE BIASING IS DISABLED.",
"1: MOISTURE BIASING IS ENABLED.",
"A: MOIST BIAS",
"CLASS-A: ENTER THE MOISTURE BIAS FACTOR.",
"THIS IS THE FRACTIONAL PART OF MOISTURE PROFILE TO BE USED TO",
" CONTROL THE BASIS WEIGHT. EXAMPLE: A BIAS OF O.O MEANS THAT",
" ALL OF THE MOISTURE PROFILE WILL BE USED SOLELY FOR CONTROL:",
" A BIAS OF 1.0 MEANS THAT THE CALCULATED BEY WT. PROFILE WILL
" BE USED SOLELY FOR THE CONTROL.",
"VALUES BETWEEN 0.0 AND 1.0 ACCEPTED.",
"A: MOIST SCALE",
"CLASS A: ENTER THE MOISTURE SCALE FACTOR.",
"THIS IS THE FRACTIONAL PART OF MOISTURE TO BE USED AS MOISTURE",
" AND NOT AS DRY WEIGHT. EXAMPLE: A SCALE OF 0.0 MEANS THAT"
" ALL OF THE BASIS WT. PROFILE WILL TO BE TREATED AS DRY WT.",
" A SCALE OF 1.0 MEANS THAT THE BASIS WT. PROFILE CONTAINS
" 100% OF THE AMOUNT OF MOISTURE INDICATED BY THE MOISTURE
" PROFILE.",
"VALUES BETWEEN 0.0 AND 1.0 ACCEPTED.",
"A: WANT SLAVING/GAIN REDUCTION",
"CLASS A: SELECT SLAVING/GAIN REDUCTION TO LEFT/RIGHT ZONES.",
"IF ENABLED THEN LEFT/RIGHT ZONE(S) WILL BE MOVED A FRACTION"
"O: FRACTIONAL MOVE IS DISABLED. NON-ZERO VALUE ENABLES.",
"?: LEFT ZONES ONLY SLAVED. 5: RIGHT ZONES ONLY PERCENTAGE",
"?: RIGHT ZONES ONLY SLAVED. 5: LEFT & RIGHT ZONES PERCENTAGE",
"?: RIGHT AND LEFT ZONES SLAVED. 7: LEFT PCT & RIGHT SLAVED.",
"?: LEFT ZONES ONLY PERCENTAGE. 8: LEFT SLAVED & RIGHT PCT.",
"A: LEFT FRACTION",
"CLASS-A: ENTER LEFT ZONE FRACTION.",
"THE VALUE ENTERED WILL BE THE FRACTION",
" THAT THE NUMBER OF SLAVED LEFT ZONES WILL BE MOVED.",
"VALUES BETWEEN -1 AND 1 ACCEPTED.",
"A: RIGHT FRACTION",
"CLASS-A: ENTER RIGHT ZONE FRACTION.",
"THE VALUE ENTERED WILL BE THE FRACTION",
" THAT THE NUMBER OF SLAVED RIGHT ZONES WILL BE MOVED.",
"VALUES BETWEEN -1 AND 1 ACCEPTED.",
"A: NUMBER OF SLAVED LEFT ZONES",
"CLASS-A: ENTER NUMBER OF LEFT ACTUATORS TO BE SLAVED TOGETHER.",
"THIS IS THE NUMBER OF ZONES ON THE LEFT WHICH WILL BE SLAVED",
" TO A FRACTION OF THE SELECTED LEFT ZONE.",
"VALUES BETWEEN 1 AND 72 ACCEPTED.",
"A: NUMBER OF SLAVED RIGHT ZONES",
"CLASS-A: ENTER NUMBER OF RIGHT SLICES TO BE SLAVED TOGETHER.",
"THIS IS THE NUMBER OF ZONES ON THE RIGHT WHICH WILL BE SLAVED",
" TO A FRACTION OF THE SELECTED RIGHT ZONE.",
"VALUES BETWEEN 1 AND 72 ACCEPTED.",
"A: LEFT ZONE(S) SLAVED TO",
"CLASS-A: LEFT ZONE OF WHICH A FRACTIONAL PART WILL BE TAKEN.",
"THIS IS THE ZONE NUMBER WHICH WILL HAVE A FRACTION OF ITS",
" VALUE ASSIGNED TO THE NUMBER OF LEFT ZONES.",
"VALUES BETWEEN 2 AND 71 ACCEPTED.",
"A: RIGHT ZONE(S) SLAVED TO",
"CLASS-A: RIGHT ZONE OF WHICH A FRACTIONAL PART WILL BE TAKEN.",
"THIS IS THE ZONE NUMBER WHICH WILL HAVE A FRACTION OF ITS",
" VALUE ASSIGNED TO THE NUMBER OF RIGHT ZONES.",
"VALUES BETWEEN 2 AND 71 ACCEPTED.",
"ACT WAIT SECS",
"ENTER THE MAX NUMBER OF SECS TO WAIT FOR ACTUATOR MOVEMENT.",
"THIS IS THE MAXIMUM NUMBER OF SECONDS TO WAIT BEFORE",
" ? WITH CONTROL. THIS IS A WATCHDOG TIMER.",
"THE NUMBER MUST BE BETWEEN 1 AND 650.",
"MINUTES BTWN SCANS",
"ENTER THE MAXIMUM NUMBER OF MINUTES TO WAIT BETWEEN SCANS.",
"THIS IS THE MAXIMUM NUMBER OF MINUTES TO WAIT BETWEEN SCANS",
" BEFORE CLEARING THE HISTORY ARRAYS AND ZEROING THE SCAN",
" COUNT. THIS IS A WATCHDOG TIMER.",
"THE NUMBER MUST BE BETWEEN 0 AND 650.",
"ENTERING ZERO DISABLES THE TIMER.",
"REMOTE OVER-RIDE",
"BASIS WT REMOTE MODE OVER-RIDE.",
"IF THIS OPTION IS ENABLED THEN NO ACTUATOR MOVEMENTS ARE",
" ARE REQUESTED OF THE BASIS WT ACTUATOR COMPUTER.",
"?: NO REMOTE MODE OVER-RIDE: MOVEMENT REQUESTS WILL BE MADE.",
"?: REMOTE OVER-RIDE ENABLED: NO MOVEMENT REQUESTS MADE.",
This note assumes a knowledge of Impact's net architecture and the serial monitor interface on each mode.
A useful diagnostic interface is available from the monitor port. At the $ prompt type A or a and <return> to drop into the diagnostics mode. This mode is indicated by the ** prompt. Information displayed at the terminal is data from within the mode to which the terminal is attached; it is not possible to directly access other modes across the net. The following commends are available.
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