OPC UA communication
9.3 Using the S7-1500 as an OPC UA server
Communication
Function Manual, 11/2019, A5E03735815-AH
159
9.3 Using the S7-1500 as an OPC UA server
9.3.1 Interesting information about the OPC UA server of the S7-1500 CPUs
9.3.1.1 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 via 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 CPs under the following conditions:
● Configuration with TIA Portal Version V16 or higher
● S7-1500 CPU firmware version 2.8 or higher and CP 1543-1 firmware version V2.2 or
higher
For configuration, see Access to OPC UA applications (Page 131).
Direct access to the OPC UA server of the CPU over the backplane bus of the automation
system is not possible via CMs.
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 165)). 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 Useful information about server methods (Page 227).
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