Configure A Pid Instruction; Specify Tuning - Allen-Bradley Logix5000 Reference Manual

Chapter 13 Special Instructions (FBC, DDT, DTR, PID)

Configure a PID Instruction

In this field
Setpoint (SP)
Set output %
Output bias
Proportional gain (K
Integral gain (K
Derivative time (K
Manual mode
516
After you enter the PID instruction and specify the PID structure, you use the
configuration tabs to specify how the PID instruction should function.

Specify Tuning

Select the Tuning tab. Changes take affect as soon as you click on another field,
click OK, click Apply, or press Enter.
Specify
Enter a setpoint value (.SP).
Enter a set output percentage (.SO).
In software manual mode, this value is used for the output.
In auto mode, this value displays the output %.
Enter an output bias percentage (.BIAS).
) Enter the proportional gain (.KP).
p
For independent gains, it's the proportional gain (unitless).
For dependent gains, it's the controller gain (unitless).
) Enter the integral gain (.KI).
i
For independent gains, it's the integral gain (1/sec).
For dependent gains, it's the reset time (minutes per repeat).
) Enter the derivative gain (.KD).
d
For independent gains, it's the derivative gain (seconds).
For dependent gains, it's the rate time minutes).
Select either manual (.MO) or software manual (.SWM).
Manual mode overrides software manual mode if both are selected.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Click here to configure the PID
instruction