Siemens SIMATIC ET 200AL System Manual page 70

Configuration control (option handling)
7.2 Configuring
Required steps
Enable the "Allow to reconfigure the device via the user program" parameter when
configuring the interface module.
• The parameter "Enable reconfiguration of device via user program" is located in the
properties of the interface module under "Module parameters" > "Configuration control".
Figure 7-2 Enabling configuration control using the IM 157-1 PN as an example
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Distributed I/O system
System Manual, 08/2021, A5E31861578-AJ