ABB ACS880 Firmware Manual page 267

Code Fault
(hex)
71A2 Mechanical brake
closing failed
Programmable fault:
Brake fault function
71A3 Mechanical brake
opening failed
Programmable fault:
Brake fault function
71A5 Mechanical brake
opening not allowed
Programmable fault:
Brake fault function
7301 Motor speed feedback
Programmable fault:
Motor feedback fault
7310 Overspeed
7380 Encoder internal
7381 Encoder 1
7391 Encoder 2
Cause
Mechanical brake control fault.
Activated eg. if brake
acknowledgement is not as
44.17
expected during brake closing.
Mechanical brake control fault.
Activated eg. if brake
acknowledgement is not as
44.17
expected during brake
opening.
Open conditions of mechanical
brake cannot be fulfilled (for
example, brake has been
44.17
prevented from opening by
parameter 44.11 Keep brake
closed).
No motor speed feedback
received.
90.45
Motor is turning faster than
highest allowed speed due to
incorrectly set
minimum/maximum speed,
insufficient braking torque or
changes in load when using
torque reference.
Internal fault.
Encoder 1 feedback fault.
Encoder 2 feedback fault.
Fault tracing 267
What to do
Check mechanical brake connection.
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake connection.
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake settings in
parameter group 44 Mechanical brake
control (especially 44.11 Keep brake
closed).
Check that acknowledgement signal (if
used) matches actual status of brake.
Check the setting of parameter
Motor feedback selection, and the actual
source selected.
Check minimum/maximum speed
settings, parameters 30.11 Minimum
speed and 30.12 Maximum
Check adequacy of motor braking torque.
Check applicability of torque control.
Check need for brake chopper and
resistor(s).
Contact your local ABB representative.
If fault appears during first start-up before
encoder feedback is used:
- Check cable between encoder and
encoder interface module (FEN-xx) and
order of connector signal wires at both
ends of cable.
If fault appears after encoder feedback
has already been used or during drive :
- Check that encoder connection wiring
or encoder is not damaged.
- Check that encoder interface module
(FEN-xx) connection or module is not
damaged.
- Check earthings (when disturbances
are detected in communication between
encoder interface module and encoder).
For more information on encoders, see
parameter groups 90 Feedback
selection, 91 Encoder module
92 Encoder 1 configuration
Encoder 2 configuration.
Check the event log for an auxiliary code.
See appropriate actions for each code at
warning A7E1 Encoder 1
See fault 7381.
90.41
speed.
settings,
and 93
(page 259).