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Transmission Info

NameData TypeDescription
Redundancy RoleStringThe redundancy configuration of the Ignition system that MQTT Transmission is installed on. Options are Independent, Master and Backup
Redundancy StateStringThe redundancy status of the Ignition system that MQTT Transmission is installed on. Options are Active or Cold
Refresh RequiredBooleanA tag indicating that new tags have been identified by Transmission and a refresh is required. The refresh can be accomplished with a full refresh of Transmission or by refreshing the individual Edge Node affected
VersionStringThe version MQTT Transmission currently installed

Transmitters

For each Transmitter, a tag tree will be created with the tag path of TransmitterName > Tag Path > GroupID > EdgeNodeID

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History Store

NameData TypeDescription
Disk UsedLong

Created if the History Store type is Disk_Backed and shows the memory used since last module restart. This parameter will never go to zero for the following reasons:

  • The initial config of the DB will contain empty seeded tables based on the number of edge nodes and devices (table per edge node and per device) and at least one metadata table.

  • Flushed rows are marked for deletion and will actually be deleted from the DB on its internal schedule. This is to minimize the writes on a flash/SSD drive.

Memory UsedLongCreated if the History Store type is In_Memory and shows the memory used since last module restart

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For each Transmitter, a tag tree will be created with the tag path of HistoryStoreName > GroupID > EdgeID  and/or > DeviceID

NameData TypeDescription
Metrics Percentage UsedFloatNumber of Edge Node or Device level tag change events stored as a percentage or the configured Edge Node or Device Tag Capacity
Metrics StoredLongNumber of Edge Node or Device level tag change events stored
Records Percentage UsedFloat
Records StoredLongNumber of Edge Node or Device level records stored

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