Parker ac890 - Page 494

Programming D-98
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
OVER SPEED TRIP
SETUP::TRIPS::OVER SPEED TRIP
Designed for SENSORLESS VEC and CLOSED-LOOP VEC Motor Control Modes.
The over speed trip operates by looking at speed feedback and comparing it against THRESHOLD.
If the feedback exceeds this threshold for a period greater than DELAY, then a trip is triggered. The trip is only active while
the drive is operating in Closed-Loop or Sensorless Vector Control.
Parameter Descriptions
INHIBIT
PREF: 123.01
Default: FALSE
Range: FALSE / TRUE
Set this parameter to TRUE to disable the over speed trip.
THRESHOLD
PREF: 123.02
Default: 150.00 %
Range: 0.00 to 300.00 %
Sets a threshold below which th
e trip will not operate. The value of THRESHOLD is compared to the value of SPEED
FEEDBACK (from the SPEED LOOP function block).
DELAY
PREF: 123.03
Default: 0.10 %
Range: 0.00 to 10.00 s
Sets the time the trip must be present for before a trip is trigger
ed.
TRIPPED
PREF: 123.04
Default: FALSE
Range: FALSE / TRUE
This is a diagnostic output indicating the current state of the over speed trip.