Rockwell Automation 22C PowerFlex 400 AC Drive FRN 1.xx - 7.xx - Manual (Page 184)

D-8 Application Notes
PowerFlex 400 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22C-UM001I-EN-P
PID Preload
The value set in A159 [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
A150 [PID Trim Hi] and A151 [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