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

C2C Communication via OPC UA PubSub with SIMATIC S7-1500 on the Basis of UDP
https://support.industry.siemens.com/cs/document/109782455/
The TIA library "LOpcUa" provides you with function blocks for the implementation of OPC UA PubSub for SIMATIC S7-1500 controllers. An exemplary implementation can be found in this application example.
With part 14 of the OPC UA specification, the communication mechanism "PubSub" was introduced. This mechanism is not based on the Client-Server principle as in conventional
OPC UA communication (OPC 10000-4), but instead uses the "Publish/subscribe principle".

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 UDP and use the transport protocol mapping "UADP" for this purpose.

This application example shows you how to use the blocks of the library using C2C communication as an example. Basically, any other communication partner that supports OPC UA PubSub can be used.
OPC UA PubSub with SIMATIC S7-1500 UDP OPC UA PubSub with SIMATIC S7-1500 UDP

OPC UA PubSub with SIMATIC S7-1500 UDP OPC UA PubSub with SIMATIC S7-1500 UDP

OPC UA PubSub via UDP offers you the following advantages:
Requires standard network equipment and no additional software components such as data brokers.
Messaging works directly and offers reduced latency and overhead.
All controllers of the SIMATIC S7-1500 product family support UDP and, therefore, implement OPC UA PubSub.

Documentation and Downloads
https://support.industry.siemens.com/cs/attachments/109782455/109782455_OPC_UA_PubSub_UDP_DOC_V1_1_en.pdf
https://support.industry.siemens.com/cs/attachments/109782455/109782455_OPC_UA_PubSub_UDP_PROJ_V1_1.zip

The Library for OPC UA Communication (LOpcUa) was integrated entirely into the Libraries for Communication for SIMATIC Controllers. You'll find the Libraries for Communication for SIMATIC Controllers in
https://support.industry.siemens.com/cs/document/109780503/

Further Information
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
Download
https://ulozto.net/tamhle/8a0E979irjKx/

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