Siemens SIMATIC S7-1500 System Manual page 146

Flexible automation concepts
9.2 Configuration control (option handling)
Required steps
Enable the "Allow to reconfigure the device via the user program" parameter when
configuring the CPU/interface module.
● For an S7-1500 CPU, you can find the "Allow to reconfigure the device via the user
program" parameter in the "Configuration control" area.
● For an IM 155-5 PN interface module, you can find the "Allow to reconfigure the device
via the user program" parameter in the "Configuration control" field under
"General">"Module parameters".
Figure 9-2 Enabling configuration control using an S7-1500 CPU as an example
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Automation system
System Manual, 09/2016, A5E03461182-AD