Hello all,

For the first time I'm using a MM420.

I want to set up a network over profibus with a CPU 315 2DP-PN, A TP177 and a MM420 with a profibusmodule 6SE6400-1PB00-0AA0.

I'm setting up thewiring and from the moment I plug the profibusplug in the MM420,
the DP network fails (In the online modus of Step7, I can not see the CPU or TP177 anymore)
I double checked the wires but they're all OK.
Can any-one tell me what I'm doing wrong please?

Thanks,

Bob