6
troubleshooting
6-1
1. Alarm groups
Alarms on this controller are one of the following 5 groups.
Group
Description
Message alarm
Error messages involving data editing or operation commands sent as data.
Operation alarm
Alarm that appears when operation ends due to an error.
Error alarm (internal cause)
Alarm that occurs due to internal causes. To resume operation after eliminating the cause of the
problem, you must reset the alarm or turn the power off and back on again. An alarm description
is stored in the alarm history.
Error alarm (external cause)
Alarm that occurs due to external causes. Alarm occurs when safety circuit is triggered.
Operation can resume after eliminating the cause.
Warning alarm
Alarm that is displayed as a warning. (This does not directly affect operation.)