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• Not Licensed
• The connection status of each MQTT Client with the MQTT Server in the format number of connected clients of total number of clients

The configuration sections available are Main, TLS, Advanced and RPC Client Connection

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• Client ID

  • Optional MQTT client ID to use.  If specified this will be used in the MQTT Transmission connect packet when connecting to the server.  If left blank, a random client ID will be create of the form 'MT-xxxxxxxx-xxxx-xxxx'.

    Warning
    Caution: MQTT Clients IDs must be unique and if two clients attempt to connect with the same client ID, one will be forcefully disconnected from the server to allow the other client to connect.

    
    

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  Keep Alive Keep Alive

  Keep Alive
  • The maximum interval in seconds (5-65,535) between any two MQTT protocol control packets sent by the client to the server.
  • The minimum Keep Alive for MQTT Transmission is 5.
  • If the client is idle and has no control packets to send, it will send PINGREQ protocol packet and the server is required to respond with a PINGRESP packet. If no response is received from the server within 1.5 times the Keep Alive, the client will close the connection.

  • If the server does not receive, at minimum, a PINGREQ message from a client within 1.5 times the Keep Alive, it will terminate the connection and send the client's LWT if it has been definedSparkplug NDEATH message to denote the client is now offline.

  • For MQTT Transmission, this is an DEATH message.

• Random Startup Delay
  • A clients variable delay between reconnect delay attempts in milliseconds - not configured by default
  • Entered in the format of 'min-max' where min is the low end and max is the high end of the random range. e.g. '10-1000'
  • Used to minimise "NBIRTH message storms" on reconnect from Edge nodes with many clients 
• Reconnect Delay
  • A clients fixed delay between reconnect delay attempts in milliseconds with a default of 1000
• Subscribe to Legacy STATE Topic
  
  • Allow the Transmission Client to subscribe to a legacy state topic (eg. STATE/IamHost) for primary host ID notifications (available from release 4.0.16)
  • Review Changes to the STATE messages in the Sparkplug v3.0.0 Specification
• Data Format Type
  • The format of the data to send
  • Default is Sparkplug_B_v1_0_Protobuf and should be used when the subscribing client is Sparkplug aware such as MQTT Engine 
  • Sparkplug_B_v1_0_JSON should only be used when the subscribing client is not Sparkplug aware and requires the payload in a JSON format. For example some AWS IoT Core consumers.

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SetsMain SetsMain

Sets - Main

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• Name
  • This is the friendly name of the set used to easily identify it.
• Description
  • This is a friendly description of the set.
    

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  PrimaryHost PrimaryHost

  Primary Host ID
  
  • The primary host ID to use for 'state' notifications.
  • If configured, MQTT Transmission will subscribe on 'state' notification topics. If MQTT Transmission is notified that the primary backend application has gone 'offline', it will close it's client connection with the MQTT server and walk to the next MQTT server defined in the set.  If the primary host ID is not set, MQTT Transmission will not subscribe on the notification topics and not receive any 'state' notifications.
  • This must contain only letters, numbers, or any of the following special characters: . $ % @ ! - _ ^ *
• Randomize Server Connections (added 4.0.28)
  • Whether or not to randomly connect to each server in the set. If enabled, the server to connect to will be randomly selected. Otherwise, a connection will be made to the next server in the list.

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SetsRPCClient SetsRPCClient

Sets - RPC Client

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• Alarm Event Enable

  • When enabled and alarms are enabled on tags, the contents of the triggered alarms will be transmitted via Sparkplug to MQTT Engine and will be inserted into the Ignition Alarm Journal on the server where MQTT Engine is installed.

• Alarm Journal Name - added in release 4.0.30
  • The pre-configured Ignition Alarm Journal name to use for alarm reconciliation

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TransmittersSparkplugSettings TransmittersSparkplugSettings

Transmitters - Sparkplug Settings

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TransmittersAdvancedSettings TransmittersAdvancedSettings

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• Filtered Properties
  • A semicolon delimited list of Tag properties to filter/block from being published

  • By default the filtered properties list contains: 

    Code Block

    accessRights;clampMode;deadband;deadbandMode;formatString;historicalDeadband;historicalDeadbandMode;historicalDeadbandStyle;historyEnabled;historyMaxAge;historyMaxAgeUnits;historyProvider;historySampleRate;historySampleRateUnits;historyTagGroup;historyTimeDeadband;historyTimeDeadbandUnits;opcItemPath;opcServer;permissionModel;rawHigh;rawLow;sampleMode;scaleFactor;scaleMode;scaledHigh;scaledLow;tagGroup;valueSource;expression;expressionType;ConfiguredTagPath;eventScripts;readPermissions;writePermissions;eventScripts;parentEnabled;sourceTagPath

    
    

  • Tag properties are only published if different from the default Ignition tag property settings and are only published in BIRTH messages.
• Rebirth Debounce Delay
  • The amount of time, in milliseconds, to delay before processing Rebirth NCMD requests after one has been processed. Default of 5000 milliseconds.
• Reconciliation Window - added in release 4.0.30
  • The amount of time to perform tag/metric reconciliation during birth publish events (in milliseconds)
  • Default is 5000
• Include Sparkplug DataTypes
  • Whether or not to include Sparkplug DataTypes for Metrics in Sparkplug DATA payloads
  • Enabled by default

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• Use Cirrus Link Encoder - added in release 4.0.30
  • Whether or not to use the Cirrus Link encoder for Sparkplug payloads. This is not Sparkplug compliant but will properly encode Ignition properties such as Dataset, Document and Array types.
  • Enabled by default

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unstransmitter unstransmitter

UNS Transmitters

The UNS Transmitter is an agent the monitors tags and publishes them as MQTT Messages with a JSON payload to an MQTT Server.

The UNS Transmitter will

• publishes a single data message for each tag when QualifiedValue of the tag changes 
• publishes a single properties message is published for each tag on every client connection
• publishes the leaf tags of Ignition UDTs and the structure of the UDT (i.e. UDT name itself and folders in the UDT) become topic tokens.
  

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• Send All Properties
  • Send all properties, including default properties, in .props messages
  • A single UNS Properties Message is published for each tag on every client connection
• Filtered Properties
  • Tag properties are only published included if different from the default Ignition tag property settings unless Send All Properties is True
  • A semicolon delimited list of Tag properties to filter/block from being published

  • By default the filtered properties list contains: 

    accessRights;clampMode;deadband;deadbandMode;formatString;historicalDeadband;historicalDeadbandMode;historicalDeadbandStyle;historyEnabled;historyMaxAge;historyMaxAgeUnits;historyProvider;historySampleRate;historySampleRateUnits;historyTagGroup;historyTimeDeadband;historyTimeDeadbandUnits;opcItemPath;opcServer;permissionModel;rawHigh;rawLow;sampleMode;scaleFactor;scaleMode;scaledHigh;scaledLow;tagGroup;valueSource;expression;expressionType;ConfiguredTagPath;eventScripts;readPermissions;writePermissions;eventScripts;parentEnabled;sourceTagPath

    
    

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HistoryMain HistoryMain

History - Main

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• Name
  • The name of the History Store.
• Enabled
  
  • Checkbox to enable/disable the History Store. Not selected by default.
• Type
  • The type of History Store.
  • Data stored in an In-Memory History Store will not be persisted across a module configuration change, module disable/enable, module restart or power loss. 
  • Data stored in a Disk-Backed History Store will persist across a module configuration change, module disable/enable, module restart or power loss.
• History Max Size
  • Maximum number of megabytes history can use before dropping the data
  • An In-Memory History store will use the Ignition Java Heap memory
• History Max Age
  
  • Maximum number of minutes to store history before dropping the data.
• Flush Quantity
  • The maximum number of tags to publish in a single message upon reestablishing communication.
  • Default is 40,000
• Flush Period
  • The period to wait in milliseconds between acquisition and publishing of the historical data when flushing messages upon re-establishing communication
  • MQTT Transmission queries the history store and builds up a publish, and publishes it, and then delays by the Flush Period.
    The actual message publish frequency is not deterministic as the time to gather the publish from the history store can vary depending on the frequency tag change events occurring, disk speed, CPU availability, etc. For example, if it takes 5s to gather up and publish that payload, the actual message publish frequency will be it will be 5s + the flush period

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