Description of IM5 taken from a Profibus document:
IM5 is mandatory if the PROFINET device contains a separate communication module with its own hardware/firmware. The IM5 data provides information about the communication module of a field device, comparable to an electronic nameplate.
A differentiation can thus be made between the HW/FW versions of the communication module and the actual device. The actual device reports its HW/FW versions via IM0.
Description of IM5 taken from a Profibus document:
IM5 is mandatory if the PROFINET device contains a separate communication module with its own hardware/firmware. The IM5 data provides information about the communication module of a field device, comparable to an electronic nameplate.
A differentiation can thus be made between the HW/FW versions of the communication module and the actual device. The actual device reports its HW/FW versions via IM0.