Siemens SIMATIC ET 200AL, System Manual

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OPC UA communication
9.4 Using the S7-1500 CPU as an OPC UA client
Communication
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Function Manual, 05/2021, A5E03735815-AJ
OPC UA instruction Maximum number for
CPU 1510SP (F)
CPU 1511 (C/F/T/TF)
CPU 1512C
CPU 1512SP (F)
CPU 1513 (F) Maximum number for
CPU 1505
(S/SP/SP F/SP T/SP TF)
CPU 1515 (F/T/TF)
CPU 1515 SP PC (F/T/TF)
CPU 1516 (F/T/TF)
Maximum number for
CPU 1507S (F)
CPU 1517 (F/T/TF)
CPU 1518 (F)
OPC_UA_WriteList 20 in total (max. 5 per
connection, see
OPC_UA_Connect)
50 in total (max. 5 per
connection, see
OPC_UA_Connect)
200 in total (max. 5 per con-
nection, see OPC_UA_Connect)
OPC_UA_MethodCall 20 in total (max. 5 per
connection, see
OPC_UA_Connect)
50 in total (max. 5 per
connection, see
OPC_UA_Connect)
200 in total (max. 5 per con-
nection, see OPC_UA_Connect)
OPC_UA_NodeReleaseHandleLi
st
4* 10* 40*
OPC_UA_MethodReleaseHandl
eList
4* 10* 40*
OPC_UA_Disconnect 4* 10* 40*
OPC_UA_ConnectionGetStatus 4* 10* 40*
* maximum 1 per connection
Maximum number of usable OPC UA client interfaces
If you create OPC UA client interfaces using the connection parameter assignment, the
number of client interfaces is limited to 40.
Create the OPC UA client interfaces by double-clicking the "Add new client interface" symbol
in the project tree of the "OPC UA communication" area.
The maximum number of OPC UA client interfaces is independent of whether you also use
the CPU as OPC UA server.
9.4.4 Example configuration for OPC UA
The following sections describe how you can use the client interfaces editor and the
connection parameter assignment.
The description is based on a specific example: Two S7-1500 CPUs operate in the system: One
CPU serves as the OPC UA client and the other as the OPC UA server.
You can, of course, also use controllers, sensors and IT systems of other manufacturers as
OPC UA clients or servers. In particular, the data exchange between different systems
(interoperability) is a major advantage of OPC UA.