6
Operation
Axis module fault
Operating Instructions – MOVIDRIVE
®
modular
191
6.5.22 Fault 28 FCB drive functions
Subfault: 28.1
Description: FCB 12 – Timeout while searching zero pulse
Response: Emergency stop + output stage inhibit
Cause Measure
Failed to find zero pulse of encoder's C track within specified
search time during reference travel
Check encoder wiring.
Subfault: 28.2
Description: FCB 12 – Hardware limit switch before reference cam
Response: Emergency stop + output stage inhibit
Cause Measure
The hardware limit switch was reached during reference travel.
The reference cam was not detected.
Make sure that the reference cam is not installed behind the
hardware limit switch.
Subfault: 28.3
Description: FCB 12 – Hardware limit switch and reference cam not flush
Response: Emergency stop + output stage inhibit
Cause Measure
Hardware limit switch and reference cam not mounted properly Make sure that reference cam and hardware limit switch are in-
stalled so they overlap.
Subfault: 28.4
Description: FCB 12 – Reference offset error
Response: Emergency stop + output stage inhibit
Cause Measure
Error while determining reference offset. – Make sure that the reference offset is not set to a larger value
than the "Modulo max." limit value.
– When using a single-turn absolute encoder, make sure that
the reference offset is not set to a larger value than one en-
coder revolution.
Subfault: 28.5
Description: FCB 12 – Referencing not possible
Response: Emergency stop + output stage inhibit
Cause Measure
In active drive train, "Actual position source" parameter is set to
"No encoder"
Assign "Actual position source", or do not perform referencing.
Subfault: 28.6
Description: FCB 12 – Limit switch/reference cam not flush/overlapping with fixed stop
Response: Emergency stop + output stage inhibit
Cause Measure
A hardware limit switch or reference cam that was not selected
was hit during reference travel to fixed stop.
Check whether the parameters set for reference travel are cor-
rect.
During reference travel to fixed stop with selected hardware
limit switch or reference cam, the fixed stop was reached
without hitting the hardware limit switch or reference cam.
Check whether the parameters set for reference travel are cor-
rect.
Subfault: 28.7
Description: FCB 21 – Test torque greater than maximum torque at motor shaft
Response: Output stage inhibit
Cause Measure
The required test torque for the brake test is higher than the
maximum torque. It cannot be generated by the motor/inverter
combination.
Reduce the test torque.
Subfault: 28.8
Description: FCB 21 – Test torque not reached
Response: Output stage inhibit
Cause Measure
Test torque required for brake test exceeds valid limit values – Reduce the test torque.
– Check limit values.
24748536/EN – 11/2017
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