Delta RMC101 - Manual (Page 558)

RMC100 and RMCWin User Manual
6-14
Using Analog Channels as Differential Force Inputs
6.1.7.3 Using Analog Channels as Pressure Inputs
Analog channels may be configured to be used as one of three pressure input types. All three
modes require the Pressure Control firmware option:
• Pressure Control
The input is used with the corresponding drive output (in this mode, analog modules without drive
outputs cannot be used for pressure control) for closed-loop, pressure control. See Controlling
Solely Position, Pressure, or Force for details.
• Auxiliary Pressure
The input does not have its own drive output. However, pressure control is achieved by sharing a
drive output of another input. This is used in applications where an axis switches between closed-
loop position control and closed-loop pressure control. See Transitioning from Position to
Auxiliary Pressure/Force Control for details.
• Pressure Reference
The input is used without the drive output. Because no drive output is used, the axis cannot do
closed-loop control. This is most often used in cases where the user wishes to have an outside
source (such as a joystick or PLC) control the target pressure, in which case another axis will be
slaved to the pressure reference input. See Using an External Target Generator for details.
All fields are used as described in the pressure/force status, command, and parameter field
topics, except when pressure reference mode is used. In this mode on all parameters are ignored
except for Configuration word, Scale A, and Offset A.
Step 1: Assign Analog Channel(s) to be Pressure Input(s)
To assign analog channels as pressure inputs, do the following:
1. On the Tools menu, click Module Configuration.
2. In the Slots list, click an analog module.
3. Click Slot options.
4. In the Analog Channel Assignment dialog box, click the tab of the channel pair (0-1 or 2-3) you
wish to assign.
5. Click the option button of a channel assignment that designates one or more channels as
Pressure Control, Auxiliary Pressure, and/or Pressure Reference. The assignment selected
depends on how you intend to use the all channels.
6. Click Update RMC.
7. The Update Module Configuration dialog box will be displayed to indicate the progress. If the
RMC could not be reset automatically, you may be prompted to reset it manually.
8. In the RMC Configuration dialog box, click Close.
The following general steps are necessary for setting up pressure inputs:
Step 2: Configure the Analog Transducer Type for the Pressure Inputs
Refer to Configuring the Analog Transducer Type for details on selecting a voltage or current input