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Alarming on MQTT Tags on the Central Gateway

Alarm & MQTT Engine Module Configuration

As stated previously, configuring alarms on MQTT Tags is no different than creating alarms on any other Ignition tag. However, when creating alarms on MQTT Engine tags, one must consider the following:

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The following two sections will provide details around the considerations above.

Alarm Configuration Persistence

Deleting an MQTT Engine tag will result in a loss of alarm configuration. Deleting MQTT Engine tags can be required in certain cases. One example is if UDTs are being propagated from the Edge and the UDT definition on the Edge has been updated. This requires one to delete all instances of the UDT under MQTT Engine and delete the corresponding UDT definition so that it can be recreated/updated at MQTT Engine for the Edge side changes to take affect. There are two options for persisting alarm configuration in this case and they are as follows:

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