Siemens SIMATIC ET 200AL System Manual page 1097

Functions
5.3 Shared device
5. Assign the module parameters.
In particular, the following settings for the CPU are necessary in the area of the
PROFINET interface [X1]:
– Enable the "IO device" option in the "Operating mode" area.
– Configure the transfer areas in the "Operating mode" > "I-device configuration" area.
Figure 5-27 Changing the address type for the transfer area
150
The "Address in IO controller" column remains empty because no IO controller is
assigned.
Note: To change an input area to an output area, and vice versa, you must navigate to
the area of the corresponding transfer area.
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH