Rockwell Automation 20M LPM15 Liquid-Cooled Adjustable Frequency AC Drive FRN 2.xxx - Manual (Page 117)

Application Notes D-7
The drive must be running for the PI loop to be enabled. The loop will be
disabled when the drive is ramping to a stop (unless “Stop Mode” is
configured in [PI Configuration]), jogging or the signal loss protection for
the analog input(s) is sensing a loss of signal.
If a digital input has been configured to “PI Enable,” two events are required
to enable the loop: the digital input must be closed AND bit 0 of the PI
Control parameter must be = 1.
If no digital input is configured to “PI Enable,” then only the Bit 0 = 1
condition must be met. If the bit is permanently set to a “1”, then the loop
will become enabled as soon as the drive goes into “run.”
PI Enabled
Spd Cmd
PI Output
PI Pre-load Value
PI Pre-load Value = 0 PI Pre-load Value > 0
Pre-load to Command Speed
PI Enabled
Spd Cmd
PI Output
Start at Spd Cmd
-100.0 -75.0 -50.0 -25.0 0.0 25.0 50.0 75.0 100.0
Normalized Feedback
Nor
maliz
ed SQR
T(F
eedbac
k)
-100.0
-75.0
-50.0
-25.0
0.0
25.0
50.0
75.0
100.0