I am facing an issue here :(

I have 400h redundant system. I am using only one CPU with two CP.

I am using both the CP as Server Mosdbus and the second I am using as Client Modbus.

The server is working fine. But the Client is not working. In the n/w connection it shows green but if i check the status i recieve an error A0FF. 

I checked the hw address called in OB1 and OB100. I checked the comm. Cycle time 

My CP is 443-1EX30-0XE0. The firmware version also seems to be fine.I have attached the program and the photos. Please help 

I went accross other siemens help page but still no solution

I have attached the details related to my program in following link

https://drive.google.com/open?id=1Z8eBvOF0VUo2lHpGQ-wj3PDvl7oP1Cr0

I am using the NW3 of OB1 and OB100 for the client config parameters calling. Then there is also one Modbus Nodes [ FC901] I am using.

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Split from Modbus TCP, in MB_REDCL i see w#16#a0ff.

I think it was wrong parameterization while trying to connect through modsim.

But very shocking the address of CP [slave address is 4] but in Modsim it is connecting with slave id 1 not 4. i dont know why

any ways it is working but i have a new issue 

i am not able to read the coils from the modsim.

i am able to read the input status , input register but not coils.

Anyone!1 some one!! please help

Thanks a lot Mr. Duris,

I have been able to simulate all signals via Modsim to my PLC and as of now it working fine. There was a Write_Read bit which I had to set to true to be able to write to coils and it worked.

[snip]

New question published by Auto-max is split to a separate thread with the subject When both our system communicate it is not working - A0FF error is coming .

Best regards
Jen_Moderator