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Scope: Core (OPC-10000-*) All specs

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OPC-30060 – OPC UA for Tobacco Machine Communication

11.28 MessageType Structure

MessageType Structure The MessageType provides a uniquely identified localised text. The MessageType structure is defined in the following table. Table 228 - MessageType Structure Name Type Description MessageType Structure Subtype
OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings

7.1.2.2 Message Header

Table 73 . Table 73 - OPC UA Connection Protocol Message header Name Type Description MessageType Byte [3] A three byte ASCII code that identifies the Message type. The following values ... Byte [1] Ignored. shall be set to the ASCII codes for 'F' if the MessageType is one of the values supported by the OPC UA Connection Protocol. MessageSize UInt32
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.2 MessageTypes

events. The defined MessageTypes are listed in Table 151 . Table 151 - PubSub MessageTypes MessageType Description DataSetMessage Application data or events supplied by the Publisher as DataSet . DataSetMetaData Discovery message with ... WriterGroups and DataSetWriters for Actions. Each message mapping defines the structure of each supported MessageType . The mechanism for identifying the MessageType associated with a NetworkMessage is specific to the message
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.4.1 Message content

presence of the value depends on the setting in the JsonDataSetMessageContentMask . For the DataSetMessage MessageType "ua-keepalive", the sequence number provides the next expected sequence number ... Table 35 . The presence of the value depends on the setting in the JsonDataSetMessageContentMask . MessageType String Possible values are "ua-keyframe", "ua-deltaframe", "ua-event
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.5.2 DataSetMetaData

DataSetMessage are used to correlate a DataSetMessage with a DataSetMetaData. A NetworkMessage with MessageType DataSetMetaData is a JSON object with the fields defined in Table 188 . Table 188 - JSON DataSetMetaData ... Description MessageId String A globally unique identifier for the message. This value is mandatory. MessageType String This value shall be "ua-metadata". This value is mandatory. PublisherId String
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.5.3 ApplicationDescription

ApplicationDescription A NetworkMessage with MessageType ApplicationDescription is a JSON object with the fields defined in Table 189 . All fields are encoded using CompactEncoding OPC UA JSON Data Encoding defined ... Description MessageId String A globally unique identifier for the message. This value is mandatory. MessageType String This value shall be "ua-application". This value is mandatory. PublisherId String
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.5.4 ServerEndpoints

ServerEndpoints A NetworkMessage with MessageType ServerEndpoints is a JSON object with the fields defined in Table 190 . All fields are encoded using CompactEncoding OPC UA JSON Data Encoding defined ... Description MessageId String A globally unique identifier for the message. This value is mandatory. MessageType String This value shall be "ua-endpoints". This value is mandatory. PublisherId String
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.5.5 Status

Status A NetworkMessage with MessageType Status is a JSON object with the fields defined in Table 191 . Table 191 - JSON Status definition Name Type Description MessageId String A globally unique ... identifier for the message. This value is mandatory. MessageType String This value shall be "ua-status". This value is mandatory. PublisherId String The Publisher that sent the message
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.5.6 PubSubConnection

PubSubConnection A NetworkMessage with MessageType PubSubConnection is a JSON object with the fields defined in Table 192 . All fields are encoded using CompactEncoding OPC UA JSON Data Encoding defined ... Description MessageId String A globally unique identifier for the message. This value is mandatory. MessageType String This value shall be "ua-connection". This value is mandatory. PublisherId String
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.5.7 ActionMetaData

ActionMetaData A NetworkMessage with MessageType ActionMetaData is a JSON object with the fields defined in Table 193 . All fields are encoded using CompactEncoding OPC UA JSON Data Encoding defined ... Description MessageId String A globally unique identifier for the message. This value is mandatory. MessageType String This value shall be "ua-action-metadata". This value is mandatory. PublisherId
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.5.8 ActionResponder

ActionResponder A NetworkMessage with MessageType ActionResponder is a JSON object with the fields defined in Table 193 . All fields are encoded using CompactEncoding OPC UA JSON Data Encoding defined ... Description MessageId String A globally unique identifier for the message. This value is mandatory. MessageType String This value shall be "ua-action-responder". This value is mandatory. PublisherId
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.6.2 ActionRequest

ActionRequest A NetworkMessage with MessageType "ua-action-request" contains a JSON array with ActionRequest messages. A ActionRequest message is a JSON object with the fields defined in Table ... created . The presence of the value depends on the setting in the JsonDataSetMessageContentMask . MessageType String "ua-action-request" The presence of the value depends on the setting
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.2.5.6.3 ActionResponse

ActionResponse A NetworkMessage with MessageType "ua-action-response" contains a JSON array with ActionResponse messages. An ActionResponse message is a JSON object with the fields defined in Table ... Status StatusCode The overall result of the Action Response. The value shall be present. MessageType String "ua-action-response". The presence of the value depends on the setting
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

7.3.4.7.2 MessageType mapping

MessageType mapping <MqttMessageType> Topic levels exist for each MessageType defined in 7.2.2 . Additional information like requirements for RETAIN for each Topic level is provided in Table ... topic access permissions are defined in Table 205 . Table 204 - MQTT Topic level MessageType mapping MessageType MqttMessageType RETAIN Required Specification Reference DataSetMessage data False Yes Defined in 7.3.4.7.3 . A system
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

A.3.3.4 Configuration parameters

SequenceNumber = 1 Bit 3: Timestamp = 1 Bit 4: Status = 1 Bit 5: MessageType configurable (default is 0) Bit 6: DataSetWriterName configurable (default is 0) Bit 7: FieldEncoding1 ... DataSetFieldContentMask Configurable (default is 0) The value shall be 0 or 0x20 if the MessageType is "ua-event". KeyFrameCount Configurable If the KeyFrameCount is not 1, the MessageType
OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub

A.3.4.4 Configuration parameters

Status = 1 The Status is omitted for ActionRequest messages. Bit 5: MessageType configurable (default is 0) Bit 6: DataSetWriterName configurable (default is 0) Bit 7: FieldEncoding1 = 0 Bit 8: PublisherId ... event". KeyFrameCount Configurable If the KeyFrameCount is not 1, the MessageType bit shall be true