Siemens Simatic PCS 7 Function Manual page 144

Advantages of high availability components
5.4 Distributed I/O
3. Place the "HART field device" in the detail view of the redundant module.
In the example, module 6 on ET 200M station with PROFIBUS address 6.
4. Select the menu command Station > Save.
The settings are saved.
5. Double-click the added HART field device in one of the ET 200M stations.
SIMATIC PDM will open.
6. Make the necessary settings for the HART field device.
Retrospect implementation of the module redundancy for HART devices
There are no mechanisms set aside to implement a module redundancy for HART devices in
PCS 7.
Additional information
Operating Manual
144
Process Control System PCS 7; SIMATIC PDM
High Availability Process Control Systems (V9.0)
Function Manual, 05/2017, A5E39221836-AA