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valz · Member 3 Joined: 26 Jul 2015 Posts: 771

OPC UA PubSub with SIMATIC S7-1500 based on MQTT/JSON
https://support.industry.siemens.com/cs/document/109814033/
OPC UA PubSub is not based on the client-server principle as in conventional OPC UA communication, but instead uses the "Publish/subscribe principle". This entry shows you the implementation of OPC UA PubSub using JSON encoding for controllers of the type SIMATIC S7-1500.
The following scenarios arise when using OPC UA PubSub:
Configurable peer-to-peer communication between controller and PLC or HMIs: The stations are not directly connected with each other and a configuration in order to make the stations known to each other is not necessary. It can be a point-to-point connection or data distribution to many receivers (multicast).
Logging on numeroase systems: Sensors or actuators can write logs into a monitoring system, an HMI, an archive system for later retrieval.
OPC UA Servers that represent services or devices can stream data to applications hosted in the cloud. For example, back-end servers, big data analysis for system optimization, and predictive maintenance.
With the TIA library "LOpcUa", Siemens provides function blocks for the implementation of
OPC UA PubSub for SIMATIC S7-1500 controllers. Both the Publish and Subscribe blocks of this library implement PubSub via MQTT and use the transport protocol mapping "JSON" for this purpose.
This application example shows you how to use the blocks of the library. Basically, any other communication partner that supports
OPC UA PubSub via MQTT/JSON can be used.

The library "LOpcUa" is part of the "Library for communication"
https://support.industry.siemens.com/cs/document/109780503/
OPC UA PubSub with SIMATIC S7-1500 based on MQTT/JSON OPC UA PubSub with SIMATIC S7-1500 based on MQTT/JSON

OPC UA PubSub with SIMATIC S7-1500 based on MQTT/JSON OPC UA PubSub with SIMATIC S7-1500 based on MQTT/JSON

Downloads TIA V17
https://support.industry.siemens.com/cs/attachments/109814033/109814033_OPC_UA_PubSub_MQTT_JSON_DOC_V1_0_en.pdf
https://support.industry.siemens.com/cs/attachments/109814033/109814033_OPC_UA_PubSub_MQTT_JSON_PROJ_V1_0.zip

Further Information
https://support.industry.siemens.com/cs/document/109782455/c2c-communication-via-opc-ua-pubsub-with-simatic-s7-1500-on-the-basis-of-udp
https://support.industry.siemens.com/cs/document/109797826/opc-ua-pubsub-with-simatic-s7-1500-based-on-mqtt
https://support.industry.siemens.com/cs/document/109770435/opc-ua-%e2%80%93-an-overview-of-the-most-important-entries-and-links

https://ulozto.net/tamhle/PkOpMjN0Rvlt/

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