GE AF-650 GP PROFINET Operating Instructions Manual page 59

Troubleshooting PROFINET Operating Instruction
10.1.6 Warning and Alarm Messages
There is a clear distinction between alarms and warnings.
When there is an alarm, the frequency converter will enter a
fault condition. After the cause for the alarm has been
cleared, the master will have to acknowledge the alarm
message before the frequency converter can start operating
again. A warning, on the other hand, may come when a
warning condition appears, then disappear when conditions
return to normal, without interfering with the process.
Warnings
Warnings within the frequency converter are represented by
a single bit within a warning word. Bit status FALSE [0] means
no warning, while bit status TRUE [1] means warning. Any bit
change in the warning word will be notified by a change of
bit 7 in the status word.
Alarms
Following an alarm message the frequency converter will
enter Fault condition. Only after the fault has been alleviated
and the controller has acknowledged the alarm message by
setting bit 7 in the control word, the frequency converter will
resume operation. Alarms within the frequency converter are
represented by a single bit within an alarm word. Bit status
FALSE [0] means no fault, while bit status TRUE [1] means
fault.
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