Set bias drive command, A.2 pressure/force control ascii commands, A.2.1 set bias drive command – Delta RMC101 User Manual
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Appendix A: Command Reference
A-47
0xDC
220
Dead Band
Eliminator
Compensation Window
(2)
Invalid command
0xDD
221
In Position Window
In Position Window (2)
Invalid command
0xDE
222
Following Error
Window
Following Error Window
(2)
Invalid command
0xDF
223
Auto Stop Error
Mask
Auto Stop Error Mask (2)
Invalid command
1. Changing these parameters on-the-fly requires firmware 20000913 or later.
2. Changing these parameters on-the-fly requires firmware 20001204 or later.
3. Changing these parameters on-the-fly requires firmware 20020426 or later.
4. Setting the scale on-the-fly requires that the axis be in open loop.
You will notice that some parameters cannot be changed on the fly. They can be changed by
stopping the axis, writing the parameters, and issuing a Set Parameters command.
Warning:
Changing any of the gains or feed forwards generates a drive discontinuity in most cases.
A.2 Pressure/Force Control ASCII Commands
A.2.1 Set Bias Drive Command
Character: B
Decimal: 66
Hexadecimal: 0x42
Command Value: Requested Bias Drive in Millivolts
At times it may be necessary to apply an extra amount of drive if you know the system tends to
lag at a particular time in a pressure ramp. This command can be used to add an additional
amount of drive while regulating pressure.
Note:
This command should only be used as a last resort. In most cases the Feed Forward or
Drive Transfer Percent fields will give the desired results with greater consistency.
This command uses the Mode, Pressure Set A, Pressure Set B and Command Value fields
different from their usual uses:
Pressure Set A and Pressure Set B:
These fields are used to give the rate that the Bias Drive is increased and decreased. Pressure
Set A is used when the Bias Drive is being moved away from 0 volts. Pressure Set B is used to
control the rate that the Bias Drive moves back toward 0 volts. See the description of the Mode
field below for details on the units used by these fields.
Mode:
The Mode field is used to specify the units of the Pressure Set A and Pressure Set B fields during