Allen-Bradley 2080-LC20-20QWB User Manual page 165

Rockwell Automation Publication 2080-UM005B-EN-E - March 2015
IPID Function Block
This function block diagram shows the arguments in the IPIDCONTROLLER
function block.
IPIDCONTROLLER IPIDCONTROLLER
EN
Process
SetPoint
FeedBack
Auto
Initialize
Gains
AutoTune
ATParameters
The following table explains the arguments used in this function block.
IPIDCONTROLLER Arguments
Parameter Parameter
Type
EN Input
Process Input
SetPoint Input
Feedback Input
Auto Input
Initialize Input
Gains Input
AutoTune Input
ENO
Output
AbsoluteError
ATWarning
OutGains
Data Type Description
BOOL Function block enable
When EN = TRUE, execute function.
When EN = FALSE, do not execute function.
Only applicable to LD, EN is not required in FBD
programming.
REAL Process value, measured from the output of controlled
process.
REAL Set point value for desired process
REAL Feedback signal, measured from control input to a
process.
BOOL Operating modes of PID controller:
• TRUE —controller runs in normal mode
• FALSE — controller out value equals to
feedback value
BOOL A change in value (True to False or FALSE to TRUE)
causes the controller to eliminate any proportional
gain during that cycle. It Also initializes AutoTune
sequences.
GAIN_PID Gains for IPIDCONTROLLER
See GAIN_PID Data type
BOOL Start AutoTune sequence
D
Appendix
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