Pi control setup and activation, Wire for pi control, Program for pi control – Rockwell Automation 160 SSC Series C FRN 7.xx User Manual

Page 55: Pi control setup and activation -17, Wire for pi control -17 program for pi control -17

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Parameters and Programming

5-17

PI Control Setup and Activation

The Analog Signal Follower model provides for closed loop process control
(PI control) where PI regulator output is used to drive the process to a desired
set point.

Wire For PI Control

1. Connect input and output power to the drive.

Follow the instructions provided in Section 2, Installation and Wiring.

2. Connect control wiring (see Chapter 2, Figure 2.17). A contact closure on

terminals 6 and 7 is required for the drive to respond to a Start/Run command.

3. Select an external frequency command source. See Table 5.B.

4. Connect feedback device to TB3-2 and TB3-3 for 0 – 10V feedback or to

TB3-3 and TB3-4 for 4 – 20 mA feedback.

5. Verify polarity of feedback. That is, increasing feedback signal requires

increasing output frequency.

Program for PI Control

1. Set P56 - [Reset Functions] to 1 to reset the drive to defaults.

An F48 - Reprogram Fault will occur which must be cleared by cycling the Stop
input to the drive.

2. Users of Firmware Version 7.06: Set P46 - [Input Mode] to the desired setting.

Users of Firmware Version 7.05 and earlier: Set P46 - [Input Mode] to 9.

Table 5.B describes how to reference the external frequency command source
for each P46 - [Input Mode] setting.

Parameter 46 Settings and Frequency Source Selection

Table 5.B

3. Cycle power or set P56 - [Reset Functions] to 2 for the change made at Step 2 to

take effect.

4. Set P72 - [Slip Compensation] to 0.

P46 Setting

Reference External Frequency Command Source

Firmware Version