Page History

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• Name
  • Default Transmitter
• Enabled
  • Whether the Default Transmitter is enabled
• Tag Provider
  
  • The name of the tag provider that Transmission will monitor.  By default this is the Ignition 'default' provider.
• Tag Path
  • A path to the root folder where the tag tree starts (optional)
• Tag Pacing Period
  
  • The buffer period for outgoing Transmission messages in milliseconds.  The default is 1000ms.  This means when a tag change event is detected 1000ms will elapse before an MQTT message is sent.  This allows additional tag change events to be buffered and put into the message and in turn reduce the number of generated MQTT messages.
• Set
  • The Set that the default MQTT Transmission client will connect to.
• Discovery Delay
  • An optional startup delay, in milliseconds, to wait before scanning for Tags to monitor. This is useful when Tags are dynamically created on initial startup, as is the case when using the MQTT Engine module.
• Aliased Tags
  • Whether to use aliases for tag names when published data messages as tag values change.  This is used to optimize payload size when publishing data.
• Compression
  • The algorithm to use to compress payloads before they are published to the MQTT Server.  If 'NONE' is selected then compression is disabled.
• Block Commands
  
  • Whether to block commands and tag writes received as messages from the MQTT server.
• Convert UDTs
  • Whether to convert UDT members to normal Tags before publishing.  If enabled the Tags representing the UDT member will retain their member path prefixed by the UDT Instance name.
• Publish UDT Definitions
  • Whether to publish UDT Definitions in BIRTH

History Settings

Note: Store and Forward does not guarantee all data is stored and forwarded. There are some edge cases that are not currently handled with regard to data loss in the event of connection failures related to MQTT keep alive timeouts. This window of potential missed data can be reduced by decreasing MQTT Transmission and MQTT Engine configurable keep alive timeouts.

• History Store
  • The MQTT Transmission History Store to use with the Default Transmitter.
• Enable History Storage by Default
  • Whether or not store and forward should be enabled by default on all tags. The custom tag property 'CL Store Forward Enabled' can be used to override this default. (default: true)
• In-Order History
  • Flush history in-order (synchronously) before live data resumes. (default: false)

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