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For each connected Edge Node, a Node Control and Node Info folder containing tags is created along with a Device Info folder for each connected device.
The tables below describes describe these tags.
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The tags below are general information tags with respect to Sparkplug Edge Nodes. These are created, managed and updated by MQTT Engine based on messages arriving from each given Edge Node.
| Name | Data Type | Description |
|---|---|---|
| bdSeq | Long | The last bdSeq number sent by the Edge Node in an NBIRTH message |
Birth Count | Long | The number of NBIRTH messages since the last time the info metrics were reset via the Node Info/Reset Info tag |
| Current Server | String | The current MQTT Server the Edge Node is connected to |
| Data Latency (ms) | Long | The time in milliseconds between MQTT Engine receiving of the last message and the payload's reported time. Note: For this to be very accurate the edge node's clock and the system clock running MQTT Engine should be synced |
| Death Count | Long | The number of NDEATH messages since the last time the info metrics were reset via the Node Info/Reset Info tag |
| Message Schema | String | The schema associated with the Edge Node (e.g. Sparkplug B) |
| Offline DateTime | DateTime | The time at which the last NDEATH message was received by MQTT Engine |
| Online | Boolean | Whether or not the Edge Node is online. This is determined by whether the last lifecycle message was an NBIRTH or NDEATH |
| Online DateTime | DateTime | The time at which the last NBIRTH message was received by MQTT Engine |
| Reset Info | Boolean | Writable tag to 'reset' the Node Info metrics |
| seq | Long | The last Sparkplug seq number received from the Edge Node |
| Total Bytes Recvd (bytes) | Long | The number of bytes received from the Edge Node since the last time the info metrics were reset via the Node Info/Reset Info tag |
| Total Bytes Xmit (bytes) | Long | The number of bytes sent to the Edge Node since the last time the info metrics were reset via the Node Info/Reset Info tag |
| Transmission Version | String | The version of MQTT Transmission installed at the Edge Node |
Device Info
The tags below are general information tags with respect to Sparkplug Devices. These are created, managed and updated by MQTT Engine based on messages arriving from each given Device.
| Name | Data Type | Description |
|---|---|---|
| Birth Count | Long | The number of DBIRTH messages since the last time the info metrics were reset via the Device Info/Reset Info tag |
| Data Message Count | Long | The number of DDATA messages since the last time the info metrics were reset via the Device Info/Reset Info tag |
| Death Count | Long | The number of DDEATH messages since the last time the info metrics were reset via the Device Info/Reset Info tag |
| Last Command Size (bytes) | Long | The size in bytes of the last DCMD that was sent from MQTT Engine |
| Last Data Message Size (bytes) | Long | The size in bytes of the last DDATA that was received from the Device |
| Offline DateTime | DateTime | The time at which the last DDEATH message was received by MQTT Engine |
| Online | Boolean | Whether or not the Device is online. This is determined by whether the last lifecycle message was an DBIRTH or NBIRTH |
| Online DateTime | DateTime | The time at which the last DBIRTH message was received by MQTT Engine |
| Reset Info | Boolean | Writable tag to 'reset' the Device Info metrics |
Engine Control
Primary Host
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| Name | Data Type | Description |
|---|---|---|
| Redundancy Role | String | The redundancy configuration of the Ignition system that MQTT engine is installed on. Options are Independent, Master and Backup |
| Redundancy State | String | The redundancy status of the Ignition system that MQTT engine is installed on. Options are Active or Cold |
| System-Wide Reset Info | Boolean | Writeable tag to 'reset' all Engine metrics |
| Total Bytes Recvd (bytes) | Integer | The number of bytes received by Engine since the last time the info metrics were reset via the System-Wide Reset Info tag |
| Total Bytes Xmit (bytes) | Integer | The number of bytes sent from Engine since the last time the info metrics were reset via the System-Wide Reset Info tag |
| Total Data Mesg Count | Integer | The number of messages received by Engine since the last time the info metrics were reset via the System-Wide Reset Info tag |
| Version | String | The version MQTT Engine currently installed |
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