Dear all,

We are having S7-400H system. We want to communicate to a wireless system via Modbus TCP. Using Modbus TCP wizard we created the Parameter DB and Data DB. Connection created in Netpro using Port 502 and its status is showing established. In CFC used a REDCLI block for reading the data from modbus. But error A0FF is coming. Kindly help.

We are using CP443-1 for Modbus TCP communication.

Regards

Surendhar M

Dear Sir,

I have checked in Netpro. Connection is showing Established.

Route is IP address of CP and Partner's IP address

Address of Local is 2000 Remote is 502.

We are not using Scalance. CP and Wireless gateway are connected in a common D Link Switch

Dear Sir,

I have attached the status for your reference. I think i have done it correctly. Maybe some mistake. Please check and suggest.

Dear Sir,

I have made some correction in Length in MB_REDCL block. Now data is fetching. I gave modbus start address as 90 and end address as 100. But even by changing the end address i cannot access value at address 112. Is there any limitation of address when using without license? I have not licensed yet.

Regards

Surendhar M