ABB ACSM1 - Page 152

Parameters and firmware blocks
152
22.08 SPEED TRIPMARGIN FW block: SPEED FEEDBACK (see above)
Defines, together with 20.01 MAXIMUM SPEED and 20.02 MINIMUM SPEED, the maximum allowed
speed of the motor (overspeed protection). If the actual speed (1.01 SPEED ACT) exceeds the speed
limit defined by parameter 20.01 or 20.02 by more than 22.08 SPEED TRIPMARGIN, the drive trips
on fault OVERSPEED.
Example: If the maximum speed is 1420 rpm and speed trip margin is 300 rpm, the drive trips at
1720 rpm.
0…10000 rpm Speed trip margin.
22.09 SPEED FB FAULT FW block: SPEED FEEDBACK (see above)
Selects the action in case of speed feedback data loss.
Note: If this parameter is set to (1) Warning or (2) No, a loss of feedback will cause an internal faulted
state. To clear the internal fault and to reactivate speed feedback, use parameter 90.10 ENC PAR
REFRESH.
(0) Fault Drive trips on a fault (OPTION COMM LOSS, ENCODER 1/2,
ENCODER 1/2 CABLE or SPEED FEEDBACK depending on the type
of problem).
(1) Warning Drive continues operation with open loop control and generates an
alarm (OPTION COMM LOSS, ENCODER 1/2 FAILURE, ENCODER
1/2 CABLE or SPEED FEEDBACK depending on the type of
problem).
(2) No Drive continues operation with open loop control. No faults or alarms
are generated. The encoder speed is zero until encoder operation is
reactivated with parameter 90.10 ENC PAR REFRESH.
t
20.01 MAXIMUM SPEED
20.02 MINIMUM SPEED
22.08 SPEED TRIPMARGIN
22.08 SPEED TRIPMARGIN
Speed