OPC UA communication
9.4 Using the S7-1500 CPU as an OPC UA client
Communication
260 Function Manual, 11/2019, A5E03735815-AH
Consistency check
Finally, check the consistency of the read/write list or method list.
1. Select the list that you want to check.
2. Click the "Consistency check" button above the "OPC UA client interface" area.
A green check mark indicates an error-free assignment of the tags or methods to the
corresponding elements of the server interface.
You can assume that the data exchange between client and server and method calls operate
without problem in runtime.
In the event of an error a list appears in the Inspector window. From this list you can jump to
the respective error.
During the consistency check, STEP 7 checks:
● Whether all elements that you use in the respective list are also present in the server.
● Do the data types used match?
● For methods: Do the number, name, order, and data types of method arguments match?
9.4.6 Determine server interface online
With STEP 7 (TIA Portal) you can determine the interface of an OPC UA server online. This
provides information on which tags of a connected OPC UA server you can read or set
(write) with OPC UA clients. It also provides information on which server methods of the
OPC UA server are available for OPC UA clients.
If you are work offline you can create the interface of the OPC UA server by means of an
OPC UA XML file. The address space of the server is described in the OPC UA XML file,
see: Export OPC UA XML file (Page 174).
Determine online server interfaces
To determine a server interface online, follow these steps:
1. In the STEP 7 project tree, select the CPU which is configured as OPC UA client
(Supervisor in the example).
2. Select the client interface (in the example, OPC UA Communication > Client interfaces >
Productionline).
If no client interface has been created, double-click "Add new client interface".
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