Delta RMC101 User Manual download pdf (Page 558)

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101

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

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