Communication between two FM458 via P-Bus

Usually with S7 CPUsyou use Data Records and SFC58-59 to read/writethose over P-Bus.
Here is some description from the manual:
[quote user="FM458-1User_Manual"]

The FM 458-1 DP has a RAM memory (128 Kbytes) which can be used

to connect it to a P bus. Data can be exchanged with one SIMATIC S7-

CPU via this P-bus memory.

The FM 458-1 DP is passive on the P bus, i.e. the FM 458-1 DP cannot

directly access other modules of the SIMATIC station.

There are 3 ways to transfer data to the SIMATIC CPU:

• 4 bytes can be received from the SIMATIC-CPU using a process

interrupt

• 128 bytes can be sent and received via SIMATIC I/O accesses

• extremely large data quantities can be sent and received using data

blocks/sets

Your FM is part of Simadyn T/400 system and I am not sure if this conference addresses this product relatedquestions.
Maybe the moderator will place this post under an appropriate conference topic if does existonefor Simadyn systems.