Siemens SIMATIC ET 200SP Function Manual

OPC UA communication
9.4 Using the S7-1500 CPU as an OPC UA client
Communication
Function Manual, 11/2019, A5E03735815-AH
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Order of the OPC UA instructions
The following figure shows the order in which the OPC UA instructions are called in a user
program in order to use these instructions to read or write PLC tags:
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
The "OPC_UA_NodeReleaseHandleList" instruction can be omitted if "OPC_UA_Disconnect" is
called immediately afterwards.
Figure 9-71 Call sequence for write and read operations
STEP 7 (TIA Portal) automatically supplies the parameters of these instructions if you are
using a client interface and a configured connection to an OPC UA server.
The procedure is shown in the following section.
Using a client interface and configured connection
To use a configured OPC UA connection, follow these steps:
1. Open your user program in the TIA Portal.
2. Using drag-and-drop, move the "UA_Connect" instruction into the program editor.
You will find the instruction under "Instructions > Communication > OPC UA" in the TIA
Portal.

Siemens SIMATIC ET 200SP Specifications

General

System Type	Distributed I/O System
Mounting	DIN Rail
Communication Protocol	PROFINET, PROFIBUS
IP Rating	IP20
Category	I/O Systems
Supply Voltage	24 V DC
Modularity	Yes
Hot Swapping	Yes
Storage Temperature	-40°C to +70°C
Digital Inputs	Yes
Digital Outputs	Yes
Analog Inputs	Yes
Analog Outputs	Yes
Communication Interface	PROFINET, PROFIBUS
Number of Modules	Up to 64
Relative Humidity	5 to 95% (non-condensing)
Operating Temperature	-25°C to +60°C