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<== Date ==> | <== Thread ==> |
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Subject: | Modbus alarms question |
From: | John Dobbins via Tech-talk <tech-talk at aps.anl.gov> |
To: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
Date: | Wed, 8 Jul 2020 16:54:14 +0000 |
All,
We have a PLC from which data is read by an IOC via Modbus (R2-11). The PLC was turned off and while the PLC was off the IOC generated a stream of alarm messages from the Alarm Server (BEAST) while the PVs toggled between
SEVERITY: INVALID STATUS: READ_ALARM
and
SEVERITY: INVALID STATUS: TIMEOUT_ALARM
Aside from configuring these alarms to be latching in the Alarm Server configuration is there some other way to make it so this state (loss of modbus communication) doesn't generate a stream of alarms?
Regards,
John Dobbins
Research Support Specialist
Cornell High Energy Synchrotron Source
Cornell University
www.chess.cornell.edu
|