Opc Ua Communication; What You Need To Know About Opc Ua; Opc Ua And Industrie 4.0; Structure Of The Description - Siemens SIMATIC ET 200AL System Manual

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OPC UA communication

Uniform standard for data exchange

Industry 4.0 stands for the intensive utilization, evaluation and analysis of the large volumes

of data from production in IT systems at the enterprise level. With Industry 4.0, data

exchange between the production and enterprise levels is rapidly increasing. However, a

prerequisite for success is a uniform standard for data exchange.

The OPC UA (OPC Unified Architecture) standard is particularly suitable for data exchange

across different levels thanks to its independence from specific operating systems, its secure

transfer procedures and the semantic description of data. OPC UA makes not only data but

also information about the data (data types) available, making machine-interpretable access

to the data possible.

In OPC UA, one system operates as a server and provides data and methods to other

systems (clients).

OPC UA clients have read and write access to data on an OPC UA server. OPC UA clients

call methods on the OPC UA server.

A system can be both a client and a server.

OPC UA server of the S7-1500 CPU

As of firmware version 2.0, an S7-1500 CPU is equipped with an OPC UA server.

The following sections describe how you configure the OPC UA server of the S7-1500 CPU

to make data and methods available for OPC UA clients so that clients have read or write

access to PLC tags on the CPU and can call server methods.

The following sections also set out how to integrate companion specifications into the

address space of the OPC UA server.

Function Manual, 12/2017, A5E03735815-AF

Communication

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