Rockwell Automation GV3000/SE AC Gen. Purpose and Vector Drive Software Start-Up and Ref. Manual - Manual (Page 217)

Using the Terminal Strip Analog Input G-7
G.4.1.2 Start Threshold Range
The default value of the start threshold is 33 A/D counts, which corresponds to 0.33
VDC (nominal).
The start threshold minimum value is 0 counts. The start threshold maximum value is
2000 counts.
G.4.2 Using the Level Sense Start Enable Feature and the Analog Input
Start/Stop Feature
The level sense start enable feature, configured with parameter P.054 (Level Sense
Start Enable), can be used with the analog input start/stop feature.
If the drive is configured for edge sense start (P.054 = 0), then the analog input must
transition from the off state to the on state while all permissive conditions are met to
start the drive.
If the drive is configured for level sense start (P.054=1), the drive will start whenever
the analog input is in the on state and all permissive conditions are met. Note,
however, that pressing the STOP key on the keypad/display will require a subsequent
off-state to on-state transition on the analog input to restart the drive.
Regardless of the value in P.054 (Level Sense Start Enable), if the analog input is in
the off state, the drive will stop and remain stopped.