OPC UA communication
9.4 Using the S7-1500 CPU as an OPC UA client
Communication
Function Manual, 05/2021, A5E03735815-AJ
317
Overview
To use the editor and the connection parameter assignment, follow these steps:
1.
First, specify a client interface. Add to this the PLC tags and PLC methods interface that you
want to access ("First step (Page 322)").
2.
Next, configure the connection to the OPC UA server (Second step (Page 339)).
3.
Finally, use the configured connection for the OPC UA client instructions (Third step
(Page 348)).
9.4.2
Useful information about the client instructions
With the standardized OPC UA client instructions you are able to control communication for
the following tasks with the S7-1500 CPU as an OPC UA client:
•
Read/write tags of the OPC UA server
•
Call methods in the OPC UA server
Optional instructions can be used to determine the following information:
•
The status of the connection between the OPC UA client and OPC UA server
•
Node IDs of nodes with known hierarchy of the address space
Standardized sequence of OPC UA communication
The sequence of the communication, and thus the order of the instructions, follows a pattern
that is illustrated in the following.
①
Instructions for preparation of read and write operations
②
Read and write instructions
③
Instructions for "clean-up" after a completed read or write operation
Figure 9-58 Run sequence for a read or write operation
Summary of Contents for SIMATIC ET 200AL
Page 2: ......
Page 143: ......
Page 218: ......
Page 250: ......
Page 296: ......
Page 337: ......
Page 365: ......
Page 392: ......
Page 419: ......
Page 451: ......
Page 483: ......
Page 597: ......
Page 648: ......
Page 702: ......
Page 739: ......
Page 781: ......
Page 804: ......
Page 828: ......
Page 853: ......
Page 880: ......
Page 906: ......
Page 996: ...Diagnostics ...
Page 1121: ......
Page 1565: ......