Sub_Only Write Change Value

Description
This counter indicates whether the
FactoryTalk Linx Gateway
 MQTT subscriber writes data to the
FactoryTalk
 destinations only when the data has changed.
FactoryTalk
 destinations can be controllers connected through
FactoryTalk Linx
, OPC UA servers connected through
FactoryTalk Linx
 OPC UA Connector,
FactoryTalk® View Site Edition (SE)
 Tag Services connected through an OPC DA server.
  • Yes: The subscriber updates the
    FactoryTalk
     destinations only when there are modifications.
  • No: The subscriber writes all data values, regardless of changes.
TIP: You can configure this setting in
FactoryTalk Linx Gateway
 Configuration > MQTT > MQTT Client > MQTT Dataset (subscriber)> Subscriber Properties > Tag Write Configuration
.
Location
  • FactoryTalk Diagnostics Counter Monitor > System Diagnostics > localhost >
    FactoryTalk Linx Gateway
     MQTT Server > [Client ID] > [Dataset Name]
Value
  • Type: Boolean
  • Source: This value is generated by the
    FactoryTalk Linx Gateway
     MQTT service.
  • Updates: This value updates when the MQTT configuration changes.
  • Reset: This value resets when you reset the service or restart the computer.
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