Alarming:LoLo:Acknowledgement Type Property (DSC Module)

LabVIEW 2013 Datalogging and Supervisory Control Module Help

Edition Date: June 2013

Part Number: 371618J-01

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Property of SharedVariableIO.

Gets or sets how the LO_LO alarm for a shared variable with a numeric data type is acknowledged. Contains the following options:

  • Auto (default) indicates that LabVIEW acknowledges the alarm when the shared variable value returns to a normal state.
  • User indicates that LabVIEW does not acknowledge an alarm until you acknowledge the alarm regardless of the alarm state. LabVIEW does not generate any new alarm instance before you acknowledge the existing alarm instance.
  • Each Occurrence indicates that LabVIEW does not acknowledge an alarm until you acknowledge the alarm. LabVIEW generates a new alarm instance whenever the alarm changes from a normal state to an abnormal state.
Note Note
  • You can enable alarming only for network-published shared variables.
  • If you specify Each Occurrence for this property, LabVIEW may generate a large number of alarm instances before you acknowledge them.

This property is similar to the Ack Type option on the Alarming page of the Shared Variable Properties dialog box.


The following table lists the characteristics of this property.

Settable when the VI is runningYes
Need to authenticate before useNo
Loads the block diagram into memoryNo
Remote access disallowedYes
Loads the front panel into memoryNo
Must wait until user interface is idleNo
Available with control VIsNo
Available with global VIsNo
Available with strict type definitionsNo
Available with polymorphic VIsNo
Available in Run-Time EngineYes
Available in Real-Time Operating SystemNo


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