Siemens SIMATIC ET 200SP Function Manual

OPC UA communication
9.1 What you need to know about OPC UA
Communication
136 Function Manual, 11/2019, A5E03735815-AH
Identifier
The Identifier corresponds to the name of the PLC tag in quotation marks. The quotation
mark is the only sign that is not permitted as part of a name in STEP 7. Quotation marks
avoid naming conflicts.
The following example reads the value of the "StartTimer" tag:
The Identifier can consist of several components. The individual components are then
separated by a dot.
The following example reads the "MyDB" array data block completely. This data block
contains an array with ten integer values. All ten values should be read in one pass.
Therefore, "0:9" is entered at the array range.
Example of NodeIds, identifiers and namespaces
The following figure illustrates the relation between NodeIds, identifiers and namespaces: It
is no problem if two nodes have the same identifiers but belong to different namespaces.
STEP 7 (TIA Portal) allows you to easily import namespaces via a server interface.

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