Siemens SIMATIC ET 200AL, System Manual

Page: 66 / 2255

Distributed I/O system
64
System Manual, 08/2021, A5E31861578-AJ
Configuration control (option handling)
7
7.1 Configuration control
Introduction
With configuration control (option handling), you handle various standard machine
configuration levels in one project without having to change the hardware configuration or
user program.
Operating principle of configuration control
You can use configuration control to operate different standard machine configurations with
a single configuration of the ET 200AL distributed I/O system.
•
A station master (maximum configuration) is configured in a project. The station master
comprises all modules needed for all possible equipment components of a modular
standard machine.
• Provision is made in the user program of the project for various station options for the
different configuration levels of the standard machine and for selection of a station
option. A station option uses, for example, only some of the modules of the station
master and these modules are not inserted in the configured order.
• Manufacturers of standard machines select a station option for a configuration level of the
standard machine. They do not have change the project or download the modified
configuration.
You use a control data record you have programmed to notify the CPU/interface module as to
which modules are missing or located on different slots in a station option as compared to
the station master. If a module with the configuration control is moved to another slot, it
retains its parameter assignment.
The configuration control allows you to flexibly vary the centralized/distributed configuration.
As a precondition for this, the station option must be able to be derived from the station
master.