Allen-Bradley 2080-LC20-20AWB, Руководство пользователя

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Rockwell Automation Publication 2080-UM005E-EN-E - March 2018
181
PID Function Blocks Appendix D
IPIDCONTROLLER Function
Block
This function block diagram shows the arguments in the IPIDCONTROLLER
function block.
The following table explains the arguments used in this function block.
IPIDCONTROLLER Arguments
Parameter Parameter
Type
Data Type Description
EN Input BOOL Function block enable
TRUE = Execute function.
FALSE = Do not execute function.
Applicable to Ladder Diagram programs.
Process Input REAL Process value, which is the value measured from the
process output.
SetPoint Input REAL The set point value for the process.
Feedback Input REAL Feedback signal, which is the value of the control
variable applied to the process.
For example, the feedback can be IPIDCONTROLLER
output.
Auto Input BOOL Operating modes of PID controller:
TRUE = Normal operation of PID.
FALSE = Output tracks Feedback.
Initialize Input 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.
Gains Input GAIN_PID Gains PID for IPIDCONTROLLER.
Use the GAIN_PID data type to define the parameters
for the Gains input.
AutoTune Input BOOL TRUE = When AutoTune is TRUE, and Auto and
Initialize are FALSE, the AutoTune sequence is
started.
FALSE = Do not start AutoTune.
ATParameters Input AT_Param AutoTune parameters
Use AT_Param data type to define the parameters for
the ATParameters input.
Output Output Real Output value from the controller.
AbsoluteError Output Real Absolute error (Process - SetPoint) from the controller.
IPIDCONTROLLER IPIDCONTROLLER
Process
ENO
Output
AbsoluteError SetPoint
FeedBack
Auto
Initialize
Gains
AutoTune
ATParameters
ATWarning
OutGains
EN