Telegram 390 between S7-1200 / CU305PN

Hi,

I'm programming 3 drives S110 with CU-305 PN, control by a S7-1200 PLC.

The problem is, I didn't take enough inputs/outputs modules on my PLC, so I want to use these that are on the CU.

I tried to use telegram 390, I put it in Starter in "Communication -> Telegram configuration" on "CU", then I downloaded the library with this telegram in Tia Portal V13, put it in data types then in DB.

After that I used DPRD_DAT and DPWR_DAT to establish the communication bewteen Starter & Tia. "RET_VAL" showed "0" so there was no error, and when I checked in my visualization table, I've seen some "TRUE" in my receive branch but when I tried to force some inputs/outputs to "1" in Starter, nothing changed in Tia.

I've searched for some documentation and explicit help to parameter correctly this telegram but I didn't find.

Can someone please help me ? 

(Excuse me for eventual faults in grammar,... etc, English isn't my native language.)

Edit : I've removed everything and went to an older save of my program TIA because of another problem, then I wanted to continue trying to set Telegram 390, but now I can't put in anymore in "Communication -> Telegram configuration", message in the picture.

Thanks for your quick response. 

I've made screens to show in a clearer way how I made the communication, because I think my post wasn't explicit enough (it's my first).

Each capture have a number as name, I'll use them to develop step by step :

1 : I put telegram 390 in my PLC data types with the sinamics telegram library.

2 : I create a DB block, which contains the telegram 390.

3 : I add in my device config the telegram 390, like I had to do with telegram 111 (this last is working perfectly), but in "DO Control Unit", not in "Servo"

4 : I note the hardware identifier for the next step.

5 : I create a network, the same as I did for telegram 111 for my X-axis.
I can use the telegram 111, everything is working etc.. It's only now, after a few weeks of programming that I realised I needed more inputs/outputs.

I can see that the RET_VAL is 0, so everything should be ok.. but it isn't.

6 : I can see that I receive information from my CU, but from now I don't know what to do, I tried to force to "1" Inputs/outputs on Starter and it doesn't change in Tia Portal, and reciprocally.

Starter 1 : all I did in Starter was to put "Telegram 390" instead of "Free", like you can see.

I hope that I've been more clear now, and that you can help me to make it work.

Thanks in advance ! :)