Number Of Client Instructions That Can Be Used Simultaneously - Siemens SIMATIC ET 200AL System Manual

Information about the client instructions
The client instructions are described in detail in the help to the Instructions > Communication
> OPC UA > OPC UA client.
Application example in Online Support
This application example (https://support.industry.siemens.com/cs/ww/en/view/109762770)
provides you with an S7 user block "OpcUaClient" that summarizes the most important
functions of the OPC UA instructions, accelerates the implementation for you and simplifies
the programming. The OPC UA server in the example is an S7-1500 controller with a simple
simulation program for process values.
The S7 user block performs the following:
• Establishment and termination of the connection to the server
• Diagnostics of the connection and automatic reconnection after connection terminations
• Registered Read
• Registered Write
• Registered Method Call
9.4.3

Number of client instructions that can be used simultaneously

SIMATIC error codes for OPC UA client instructions
The following limits apply to the simultaneous use of OPC UA client instructions (up-to-date
technical specifications of the CPUs can be found on the Internet
(https://support.industry.siemens.com/cs/ww/en/ps/td)):
Table 9- 5 Quantity structures for OPC UA client instructions
OPC UA instruction
OPC_UA_Connect
OPC_UA_NamespaceGetIndexLi
st
OPC_UA_NodeGetHandleList
OPC_UA_MethodGetHandleList 4*
OPC_UA_TranslatePathList
OPC_UA_ReadList
Communication
Function Manual, 05/2021, A5E03735815-AJ
Maximum number for
CPU 1510SP (F)
CPU 1511 (C/F/T/TF)
CPU 1512C
CPU 1512SP (F)
CPU 1513 (F)
4
4*
4*
4*
20 in total (max. 5 per
connection, see
OPC_UA_Connect)
9.4 Using the S7-1500 CPU as an OPC UA client
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)
10
10*
10*
10*
10*
50 in total (max. 5 per
connection, see
OPC_UA_Connect)
OPC UA communication
Maximum number for
CPU 1507S (F)
CPU 1517 (F/T/TF)
CPU 1518 (F)
40
40*
40*
40*
40*
200 in total (max. 5 per con-
nection, see OPC_UA_Connect)
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