Rockwell Automation 1771-PD PID MODULE (+DU) User Manual

Page 132

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Programming

Chapter 3

3Ć89

Word W38

Bit 17 = 1 if using two loops.

Download this data to the module using the load/enter sequence. The
module initializes and waits for PID control parameters. If not, refer to
error codes in W60.

Add PID control parameters by a single load/enter sequence using the
module’s soft fault mode. We recommend using this method when your
PID module is connected to a live process because you can load data table
files in advance, and download them in one operation.

Reset to 0 the module’s soft fault reset bit, W01 B10.
Place the processor in program mode.
Load PID control parameters into the data table.
Set to 1 the module’s soft fault reset bit, W01 B10.
Put the processor in run or run/program mode.
Initiate the load/enter sequence.

You may also add PID control parameters one word at a time in run mode
using on-line data change. We recommend using this method when your
PID module is not connected to a live process because the PID module
operates with partial data until configuration is complete. Refer to the
Programming and Operations Manual of your processor for the procedure
to change data on-line.

Once you have downloaded PID control parameters to the PID module,
use on-line data change to adjust or tune existing loops.

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