Adding a delay to BAD_ACTIVE for alarm

I have a number of modules with BAD_ACTIVE alarms that chatter. I want to add an "on delay" using an OND block and switch the alarm from BAD_ACTIVE to the OUT_D of the delay block. But it doesn't appear that BAD_ACTIVE is Boolean. Does anyone have any thoughts about how I might apply a delay like this to BAD_ACTIVE? It doesn't appear that direct-wiring BAD_ACTIVE (e.g., using an "internal reference") is going to work - or will it?

• Alarm Tuning

John Rezabek

• 1 Jul 2015 7:30 PM
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2 Replies

• Matt Stoner

  

  • 1 Jul 2015 7:48 PM

  John,
  
  Your method should work but I would just add a condition block with the expression '^/BAD_ACTIVE.CV' = TRUE, configure the TIME_DURATION parameter on the condition block to the amount of delay you want and then change the module alarm to use the OUT_D parameter of this condition block instead of BAD_ACTIVE.

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• Alfred Pol

  

  • 1 Jul 2015 7:49 PM

  You can either use an Internal Read Parameter with an Internal Reference to the BAD_ACTIVE parameter and feed that to the OND functionblock, or use a CND block with expression '^/BAD_ACTIVE.CV' = TRUE and set the TIME_DURATION.
  
  (BAD_ACTIVE is a boolean type parameter.)

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