Rockwell Automation 22B PowerFlex 40 FRN 1.xx - 6.xx - Manual (Page 151)

PID Set Up F-7
PowerFlex 40 Adjustable Frequency AC Drive FRN 1.xx - 6.xx User Manual
Publication 22B-UM001H-EN-E
PID Preload
The value set in A139 [PID Preload], in Hertz, will be pre-loaded into
the integral component of the PID at any start or enable. This will cause
the drive’s frequency command to initially jump to that preload
frequency, and the PID loop starts regulating from there.
PID Limits
A130 [PID Trim Hi] and A131 [PID Trim Lo] are used to limit the PID
output and are only used in trim mode. [PID Trim Hi] sets the maximum
frequency for the PID output in trim mode. [PID Trim Lo] sets the
reverse frequency limit for the PID output in trim mode. Note that when
the PID reaches the Hi or Lo limit, the PID regulator stops integrating so
that windup does not occur.
PID Enabled
Freq Cmd
PID Output
PID Pre-load Value
PID Pre-load Value > 0
22B-UM001.book Page 7 Wednesday, January 22, 2014 11:04 AM