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Acknowledging alarms

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  • Acknowledging alarms

    How can PLCs know when alarms are acknowledged? Is there a tag that turns on/off based on whether alarms are acknowledged or not?


  • #2
    Do you mean in an HMI? If so, which one?

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    • #3
      I have same question, specific to EA9 panels.

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      • #4
        most people program the alarms as bits in the PLC, and it's the HMI that sees the alarm, but every situation is different.

        You can have the alarm turn on a PLC bit, then have it turn off when the alarm is acknowledged. Use Event Manager in C-More.

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