Hello.

Im having big issues while trying to communicate between a S7400 and 3 ET200MP with Step7 and via Profinet.

The hardware is correct and the versions are ok, but when I upload them the PLC goes to STOP and if im online I cant see the ETs status. Every single module just keeps blinking while im here having a stress attack.

I have tried to disconnect 2 of them and im trying to watch and connect only the first ET, but it stays the same.

Can anyone help me?

Hello

do you have searched in forum for other topics to this task:

https://support.industry.siemens.com/forum/de/en/posts/s7-400-h-with-et200-mp-io-systems/259655

perhaps it helps

Bye Murof

Conclusion:

The problem was the profinet names given to the devices via proneta. I set the names from proneta, and when I told Step 7 classic to find whatever was in that net it found the devices, took those names and added prefixes and sufixes, but on Stepp 7 you only saw the raw names. 

For example, if I named a device "ET200MP" on PRONETA, on Step 7 classic it was naming it "xdET200MPfhc", but being displayed as "ET200MP".

In order to see the real name you need to access to STEP 7 manager, click on "Sistemas de destino" (in english something like "Destination systems"?), then click on "Editar estaciones ethernet" (in english something like "Edit Ethernet stations").

There click on "Search", select your device and at bottom will be displayed the profinet name given and you´ll be able to change it.

Hope this helps someone.