Delta RMC101 User Manual
Page 220
RMC100 and RMCWin User Manual
4-34
• If the axis is force control:
Enter the following information:
• Maximum gauge reading
• Actuator Type
• Cylinder Dimensions
• Desired Force Units
• Desired Force Direction
This information allows the Actual Pressure in the Status area of the main screen to
display the net force on the cylinder.
• Click Apply or Done when you are finished.
2. Assign the Pressure Axis to a Position Axis
The RMC performs pressure control using two or more inputs from transducers and one drive output
to the hydraulic valve. Any position axis with analog drive output (not stepper output) can be used to
provide the drive output and position input. To enable pressure control on this position axis, you must
assign a pressure-enabled analog axis to the position axis. In this configuration, the analog inputs—
whether using two transducers monitoring differential force, or a single transducer monitoring single-
ended pressure—are then used together with the position axis to control both position and pressure.
To assign a pressure axis to a position axis:
a. Double-click the Config Word for the position axis. This will open the Config Word dialog
box.
b. In the Pressure Axis field, click the desired Pressure Axis.
c. Click OK.
d. Issue a Set Parameters (P) command to cause these bits to take effect.
e. If you want the axis assignment to be remembered after the RMC power is cycled, then
issue an Update Flash (U) command
. This needs to be done only once.
3. Set Up the Event Step Table
Setting up and tuning position/pressure control requires issuing multiple commands numerous times.
Doing this from a PLC or by typing commands in RMCWin is very awkward. To simplify the process,
Event Steps in RMCWin should be used for setting up and tuning position/pressure control.
To perform position/pressure control, the following steps must be set up in the Event Step
Table:
1. Issue a P command so the axis will hold position.
2. Issue a Set Null Drive to Integral Drive (n) command. This updates the null drive (drive
needed to hold position), which is critical for pressure control.