The Opc Ua Server Of The S7-1500 Cpus - Siemens SIMATIC ET 200AL System Manual

OPC UA communication
9.1 What you need to know about OPC UA
9.1.5

The OPC UA server of the S7-1500 CPUs

The S7-1500 CPUs as of firmware V2.0 are equipped with an OPC UA server. Apart from
the Standard-S7-1500 CPUs this applies to the variants S7-1500F, S7-1500T, S7-1500C,
S7-1500pro CPUs, ET 200SP CPUs, SIMATIC S7-1500 SW controllers and PLCSIM
Advanced.
Convention: "S7-1500 CPUs" also includes the above-mentioned CPU variants.
S7-1500 CPU OPC UA server basics
Access to the OPC UA server of the CPU is possible over all integrated PROFINET
interfaces of the S7-1500 CPU.
Direct access to the OPC UA server of the CPU over the backplane bus of the automation
system is not possible via a CP or CM.
For access by clients, the server saves the enabled PLC tags and other information in the
form of nodes (see Configuring access to PLC tags (Page 157)). These nodes are
interconnected and form a network. OPC UA defines access points to this network (well-
known nodes) that enable navigation to subordinate nodes.
With an OPC UA client you can read, observe or write values of tags of the PLC program as
well as call methods that are available to the server. As of firmware version 2.5 you can
implement methods, see Server methods (Page 180).
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Communication