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How often is a SNVT in a Lon device polled if an alarm monitors that variable?


How often is a SNVT in a Lon device polled if an StruxureWare Building Operation alarm monitors that variable? What happens if a shunt variable is used - is the polling rate still the same?


Lon Device

StruxureWare Building Operation


Alarms are to monitor SNVTs in a Lon device put polling may overload the network.


An alarm monitoring a SNVT will be polled every 100 ms. If a shunt variable is then activated the pollrate will drop to 5 000 000 ms. This can be seen in the variable manager:

  • Go to Server 1/System/Modules/RuntimeDBManager/VariableManager/Variables in Workstation
  • Locate the variable in question and ensure that the Imposed Pollrate column is shown.
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‎2018-09-06 09:50 AM
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