ABB IRC5 Operating Manual page 410

5 Troubleshooting by event log
5.9 9 xxxx
Continued
Probable causes
One or more of the red emergency stop buttons have been
activated.
Recommended actions
Isolate the Emergency Stop button that was opened. Reset the
button.
90235, Immediate Auto Stop
Description
The Auto Stop circuits have been broken.
Consequences
The system goes directly to status Guard Stop.
Probable causes
One or more of the safety device switches in the Auto Stop
circuit have been opened.
Recommended actions
Isolate the safety device that was opened. Reset the device
switch.
90236, Immediate General Stop
Description
The General Stop circuits have been broken.
Consequences
The system goes directly to status Guard Stop.
Probable causes
One or more of the safety device switches in the General Stop
circuit have been opened.
Recommended actions
Isolate the safety device that was opened. Reset the device
switch.
90237, Immediate Superior Stop
Description
The Superior Stop circuits have been broken.
Consequences
The system goes directly to status Guard Stop.
Probable causes
One or more of the safety device switches in the Superior Stop
circuit have been opened.
Recommended actions
Isolate the safety device that was opened. Reset the device
switch.
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410
90238, Delayed Superior Stop due to circuit
imbalance
Description
The system has detected an imbalance in the two parallel
Superior Stop circuits.
Consequences
The system goes to status Guard Stop after approximately 1
sec.
Probable causes
The contact pair in any of the safety devices connected to the
Superior Stop circuit is not working correctly.
Recommended actions
Isolate the safety device causing the conflict. Make sure the
device used is a two-channel device. Check the contact pair.
Make sure all connections are tight. Replace the device if
required.
90240, Conflict between ENABLE signals
Description
A switch in only one of the two enable chains was affected,
without the other chain being affected.
Consequences
The system goes to status SYS HALT.
Probable causes
There may be a loose signal connection on the safety system.
The enable chain is described in the Trouble Shooting Manual
and Circuit Diagram.
Recommended actions
Check cables and connections. Make sure all signal connectors
on the safety system are securely connected. If there is no
loose connection, replace the faulty board.
90241, Operating mode conflict
Description
There is a conflict between the operating mode selected on the
operating mode selector on the controller cabinet front and the
actual operating mode as detected by the axis computer.
Consequences
The system goes to status SYS HALT.
Probable causes
There may be a hardware fault in the operating mode selector
or its cabling to the safety system.
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Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA