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Note that the 'Sparkplug IDs' are 'My MQTT Group/Edge Node c3420b' in this example.  These exact values will be used for the EFM Emerson ROC connection Sparkplug parameters to tell the EFM Emerson ROC which MQTT Transmission Transmitter configuration to use and, in turn, which MQTT connection to use to send the alarm data on. So, to match the Transmitter configuration in this example, we must set the Sparkplug IDs in the Emerson ROC driver instance as shown below:. Note the Group ID and Sparkplug ID are defined in the MQTT Transmission Transmitter configuration. The Device ID is being picked up from the Ignition default Tag Provider tag tree.

Next the MQTT Transmission server configuration must be modified to point to the Central Ignition Gateway we set up earlier.  To do so, in the Ignition Gateway Web UI browse to the Configure tab on the top and then to MQTT Transmission Settings in the lower left as shown below.

In the MQTT Transmission Settings configuration, click the Servers tab.  Then click 'edit' on the Chariot SCADA MQTT Server definition.  Modify the URL to match the URL of the Central Ignition Gateway.  In this example, MQTT Distributor is installed on a Central Ignition Gateway at the IP address of 192.168.1.2.  Once the URL is modified to match the configuration, there should be a '1 of 1' in the Connected column as shown below.

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The next step is configuring the EFM Emerson ROC module.  This is done as described in the Emerson ROC Configuration manual.  In going through the basic setup and configuration for Alarm configuration the following steps must be performed:

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