Siemens SIMATIC ET 200SP System Manual page 139

Configuring
7.2 Configuring the CPU
Hardware identifier
STEP 7 automatically assigns a hardware identifier to identify and address modules and
submodules. You use the hardware identifier in the case of diagnostic messages or
operations, for example, to identify a defective module or the module addressed.
Figure 7-6
In the "System constants" tab, you will find all hardware identifiers and their symbolic names
(of the hardware identifier) for the selected module.
You can also find the hardware identifiers and names for all modules of a device in the
default tag table of the "System constants" tab.
Figure 7-7
138
Example of a hardware identifier from STEP 7
Example of an excerpt from a default tag table in STEP 7
Distributed I/O system
System Manual, 09/2019, A5E03576849-AJ