Siemens SIMATIC PCS 7 - CP 443-1 for Plant B with Standard as

Time synchronization
Activate time synchronization for both CPs in the SIMATIC mode.
6.3.2 CP 443-1 for plant B with standard AS
Connecting the plant bus
Enter the correct MAC address and establish the connection to the plant bus.
Note
A MAC address can only be used once on a plant bus operated with the ISO protocol.
Configuration of the hardware (AS and I/O)
6.3 Settings for CP443-1 as a plant bus interface
Compendium Part A - Configuration Guidelines (V8.2)
Configuration Manual, 08/2016, A5E38166869-AA 101