ABB IRC5 Operating Manual page 406

5 Troubleshooting by event log
5.9 9 xxxx
Continued
90206, General Stop open
Description
The General Mode Safeguarded Stop circuit has been broken.
Consequences
The system goes to the General Stop status.
Probable causes
One or more of the switch connected in series with the General
Mode Safeguarded Stop circuit have been opened, which may
be causes by a large number of faults. This is possible in any
operational mode. The General Mode Safeguarded Stop circuit
is described in the Trouble Shooting Manual.
Recommended actions
Locate the switch, reset it and restart the controller. Check
cables and connections.
90208, Chain switches open
Description
A safety chain, other than Auto Stop and General Stop, has
been broken.
Consequences
The system goes to the Guard Stop status.
Probable causes
One or more of the switch connected in series with the run
chain top circuit have been opened, which may be causes by
a large number of faults. The run chain top is described in the
Trouble Shooting Manual and Circuit Diagram.
Recommended actions
Check other error messages for primary fault reason. Locate
the switch, reset it and restart the controller. Check cables and
connections.
90209, External Contactor open
Description
An external contactor has been opened.
Consequences
The system goes from the Motors OFF status to SYS HALT
when attempting to start.
Probable causes
The run chain of external equipment has been broken, which
may be caused by the external contactor auxiliary contacts or,
if used, any PLC, controlling it. The external contactor supplies
power to a piece of external equipment, equivalently to how the
RUN contactor supplies a robot. This fault may occur when
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attempting to go to the Motors ON mode only. The run chain is
described in the Trouble Shooting Manual and Circuit Diagram.
Recommended actions
Locate the switch, reset it and restart the controller. Check
cables and connections. Check the external contactor auxiliary
contacts. If used, check any PLC equipment controlling the
external contactor.
90211, Two channel fault, Enable Chain
Description
A switch in only one of the two enable chains was briefly
affected, opening the chain and then reclosing it, without the
other chain being affected.
Consequences
The system goes to status SYS HALT.
Probable causes
There may be a loose signal connection on either the axis
computer or 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 axis computer board and the safety system are securely
connected. If there is no loose connection, replace the faulty
board.
90212, Two channel fault, Run Chain
Description
Only one of the two run chains was closed.
Consequences
The system goes to status SYS HALT.
Probable causes
Any of the switches connected to the run chain may be faulty
or not correctly connected, causing only one channel to close.
The run chain is described in the Trouble Shooting Manual,
IRC5.
Recommended actions
Check cables and connections. Check other event messages
occurring at the same time to determine which switch caused
the fault. Make sure all switches are working correctly. To assist
in returning the chains to a defined status, first pressing, then
resetting the Emergency Stop. If there is no loose connection,
replace the faulty switch.
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Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA