Siemens SIMATIC S7-1500 System Manual page 125

Figure 9-1
You use a control data record you have programmed to notify the CPU/interface module as
to which modules in a station option are missing or located on different slots in the real
installation as compared to the station master. The configuration control does not have an
impact on the parameter assignment of the modules.
The configuration control enables you to vary the central/distributed configuration flexibly.
This is only possible if the station option can be derived from the station master.
Note
With the S7-1500, configuration control is possible both with central plugged modules and
also with distributed I/O devices via PROFINET IO.
Automation system
System Manual, 12/2014, A5E03461182-AC
Operating principle of configuration control
Flexible automation concepts
9.2 Configuration control
125