Example: How To Add A Udfb To A Pid Program - Allen-Bradley Micro800 General Instructions Manual

Programmable controllers

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Proportional Integral Derivative (PID) instruction

IPIDController with a feedback loop

The following function block diagram includes a feedback loop for the

manipulated value that prevents excessive overshooting by providing a minimum

and maximum value for the MV.

Example: How to add a UDFB to a PID program

You can add UDFBs outside the main program to perform specialized functions

such as converting units or transferring values.

Transfer the auto-tune gain value

This UDFB transfers the Autotune gain value to My_GainTransfer so it can be

used by the controller.

Rockwell Automation Publication 2080-RM001D-EN-E - February 2015