Siemens SIMATIC ET 200AL System Manual page 1713

Functions
5.2 Intelligent IO devices (I-devices)
You disable the I-device function with the instruction "D_ACT_DP":
• Via the symbolic name or the hardware identification of the I-device of the respective
PROFINET interface as LADDR parameter, in the example, HW identification 260
• Via the MODE parameter = 2
Figure 5-23 Example: I-device system constants
Result: The goal has been accomplished: The CPU with disabled I-device function is no longer
available for the data exchange with a higher-level IO controller. The higher-level IO
controller can be reached again when the I-device function was enabled in the user program
of the I-device CPU.
When an I-device that has been active on an IO controller disables itself, all application
relations (ARs) that were set up between the I-device and the IO controller in the network are
terminated. An IO device failure is signaled at the IO controller end. In the diagnostic buffer
of the I-device CPU, "IO device user disable" is displayed with information on the associated
PROFINET interface or the name of the IO controller.
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PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL