ABB IRC5 Operating Manual page 425

Probable causes
One or more mechanical units exceeded the unsynchronized
mode speed limit.
Recommended actions
Jog all axes slowly to the synchronization position, and perform
a synchronization of the safety controller.
90518, Safety Controller Emergency Stop
triggered
Description
Emergency Stop arg has been triggered in the safety controller.
Consequences
The safety controller will stop all robot movements.
Probable causes
An emergency stop request has been received by the safety
controller.
Recommended actions
Deactivate the emergency stop and restart the program.
90519, Safety Controller Input/Output Mismatch
Description
Different inputs/outputs reported by the two channels in the
safety controller for drive module arg. The mismatch type was
arg.
Type 1: Input.
Type 2: Output.
Consequences
The safety controller will stop all robot movements. No full
speed operation is possible until the mismatch has ceased.
Probable causes
Error in the cabling to the safety controller. Dual channel
mismatch in the safety supervision, due to limited numerical
accuracy.
Recommended actions
Check the safety controller cabling. Check if one or more axes,
points, or volumes are close to a zone or range border.
90520, Safety Controller Result Mismatch
Description
Different supervision results reported for the two channels in
the safety controller for drive module arg.
Consequences
The safety controller will stop all robot movements. No full
speed operation is possible until the mismatch has ceased.
Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
Probable causes
One or more axes, points, or volumes are close to a zone or
range border.
Recommended actions
In manual mode, jog away from the zone or range border.
90521, Safety Controller Brake Test violation
Description
Movement detected during Brake test for drive module arg, axis
arg.
Probable causes
The brake test failed or was interrupted.
Recommended actions
Perform a new brake test. If the problem persists, replace the
brake.
90522, Safety Controller External power supply
error
Description
Incorrect feedback from the external power supply contactors
was detected by the safety controller.
Consequences
The safety controller will deactivate the external power supply.
Probable causes
The contactors or the cable harness may be defect.
Recommended actions
Check the connections to the external power supply.
90523, Safety Controller Protective Stop triggered
Description
Protective Stop arg has been triggered in the safety controller.
Consequences
The safety controller will stop all robot movements.
Probable causes
A protective stop request has been received by the safety
controller.
Recommended actions
Deactivate the protective stop and restart the program.
90524, Safety Controller configuration error
Description
The Safety Controller failed to load the safety configuration file
arg.
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5 Troubleshooting by event log
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