Rockwell Automation 22B PowerFlex 40 FRN 1.xx - 6.xx - Manual (Page 145)

PowerFlex 40 Adjustable Frequency AC Drive FRN 1.xx - 6.xx User Manual
Publication 22B-UM001H-EN-E
Appendix
F
PID Set Up
PID Loop
The PowerFlex 40 has a built-in PID (proportional, integral, differential)
control loop. The PID loop is used to maintain a process feedback (such
as pressure, flow or tension) at a desired set point. The PID loop works
by subtracting the PID feedback from a reference and generating an error
value. The PID loop reacts to the error, based on the PID Gains, and
outputs a frequency to try to reduce the error value to 0. To enable the
PID loop, parameter A132 [PID Ref Sel] must be set to an option other
than 0 “PID Disabled”.
Exclusive Control and Trim Control are two basic configurations where
the PID loop may be used.
22B-UM001.book Page 1 Wednesday, January 22, 2014 11:04 AM