MODBUS TCP/IP ERRORs

Hello

I am using EMC2 and classic ladded to talk to a GE-30 PLC over modbus TCP/IP. I can write to the registers. My problem is that i keep getting a Modbus error screen with no information from classic ladder and sometimes will loose my communication all together until i restart emc. Everything worked great talking to the modbus PLC simulator.....

Can anyone help?

John

I determined that the problems came from the cross over from the PLC simulator to the 90-30. I did not have the 1st modbus element loaded with the correct number

Could you describe exactly how you use TCP ?
I could never get it to work.

Yes i would be more than happy to help you... could you send me and example of what you are trying to connect to

Well Classicladder actually can be set up as a slave.
But A modbus simulator would be good too.

I am working on putting a little doc together for you

Here is a PDF i put together to help you out. Let me know if you need anything else.

hmm didnt work. i can email it to you