ABB IRC5 Operating Manual page 146

5 Troubleshooting by event log
5.4 2 xxxx
Continued
20473, SC arg Dual Computer mismatch
Description
Safety Controller (SC) arg have had conflicting values for a
Safety Output for too long.
Consequences
The Safety Controller has entered a Safe State and issue an
error after 10 minutes of internal mismatch, if recommended
actions are not performed.
Probable causes
The mechanical unit have been parked at a position on, or close
to, a supervised or monitored function limit for too long time.
Internal computation error in Safety Controller.
Recommended actions
Move all mechanical units' axes and tools well inside or outside
monitored and supervised function limits.
20474, SC arg I/O Supply Failure
Description
I/O supply voltage level for Safety Controller (SC) arg is out of
range.
Probable causes
Either the voltage is out of limits or the voltage is missing.
Recommended actions
Connect 24V supply with correct voltage level to I/O supply
terminals. Restart robot controller.
20475, SC arg Synchronization rejected
Description
Safety Controller (SC) arg is not correctly configured for
synchronization.
Probable causes
Safety configuration PIN is not set or is incorrect. Safety
configuration is empty. Safety configuration is corrupt or
missing. Safety Controller connected to the wrong SMB bus.
I/O power supply missing.
Recommended actions
Verify and check possible causes.
20476, SC arg Disabled
Description
Safety Controller (SC) arg is disabled.
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Consequences
All safety supervision has been disabled in the Safety Controller.
Risk for safety hazards.
Recommended actions
Download a safety configuration to the Safety Controller.
20477, SC arg SMB Communication Failure
Description
Safety Controller (SC) arg failed to communicate with serial
measurement board (SMB).
Recommended actions
Make sure that the cabling from SMB to Safety Controller is
connected to the right SMB connector and functional. Restart
the robot controller.
20478, SC arg Main Supply Failure
Description
The main power supply voltage for Safety Controller (SC) arg
is out of range.
Probable causes
Either the voltage is out of limit or the voltage is missing.
Recommended actions
Check Safety Controller cabling. Check voltage from power
supply. Restart robot controller.
20479, SC arg Additional Axis missing
Description
An additional axis that is supervised by Safety Controller (SC)
arg is no longer present in the system configuration.
Recommended actions
Reinstall the supervised additional axis, or download a safety
configuration without supervision of the additional axis.
20480, SC arg SST violation
Description
Safe Stand Still (SST) arg in Safety Controller (SC) is violated
on mechanical unit arg axis arg.
Recommended actions
Verify RAPID program. Verify process equipment. Check that
movement is not ongoing when SST is active. Check previous
event messages.
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Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA