Ipidcontroller - Allen-Bradley Micro800 General Instructions Manual

Chapter 20
Proportional Integral Derivative (PID) instruction

IPIDCONTROLLER

Parameter Parameter type
EN Input
Process Input
SetPoint Input
FeedBack Input
Auto Input
Initialize Input
Gains Input
AutoTune Input
ATParameters Input
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IPIDCONTROLLER is used for proportional integral-derivative (PID) logic,
which controls physical properties such as temperature, pressure, liquid level, or
flow rate using process loops.
Arguments
Data type Description
BOOL Function block enable.
When EN = TRUE, execute function.
When EN = FALSE, do not execute function.
Applies only to LD programs.
REAL Process value, which is the value measured from the process output.
REAL Set point.
REAL Feedback signal, which is the value of the control variable applied to the process.
For example, the feedback can be IPIDCONTROLLER output.
BOOL The operation mode of the PID controller:
• TRUE - controller runs in normal mode.
• FALSE - controller causes reset R to track (F-GE).
BOOL A change in value (TRUE to FALSE or FALSE to TRUE) causes the controller to eliminate any
proportional gain during that cycle. Also initializes AutoTune sequences.
GAIN_PID Gains PID for IPIDController.
See GAIN_PID data type
BOOL When set to TRUE and Auto and Initialize are FALSE, the AutoTune sequence is started.
AT_Param Auto Tune Parameters.
See AT_Param data type
Rockwell Automation Publication 2080-RM001D-EN-E - February 2015
on page 566.
on page 566.