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Tag Relays

The Tag Relays category contains the two components that share tags between Profinity instances, so a head office can watch many sites, vehicles, or installations from one central instance. Both require the Data Relay licensed feature on the instance they run on, as described in Licensing. For what a relay is, how tags are mounted, collision rules and known limitations, refer to the Tag relay concept page.

  • Tag Relay Sender runs on the site instance that owns the tags and sends a snapshot of the tags in selected collections at a fixed interval.
  • Tag Relay Receiver runs on the central instance and mounts the incoming tags as read-only tags under a prefix that identifies the sending site.
  • Set up a tag relay connects a first sender and receiver over HTTPS or Message Queuing Telemetry Transport (MQTT).

Tag Relay works between Profinity instances only and does not use Sparkplug. If the other end is a third-party Sparkplug B source, use the MQTT Subscriber instead.