AC110 modbus connection to AC800M
In our project,we have one AC110 ABB controller and one AC800M controller.I want connecto to controller via modbus.I have installed CI532V02 card on AC110 and I have cofigured all data base elements related to this card(MVI,MVC,MVN,MVB data blocks).I connect to contoller toghter via to modem westermo MD-12,and i created logic of modbus connection in AC800M.Now function block(MBconnect and MBread) indicate that connection is valid,but I don't received any data.Please help us.
Go through the manuals for both the AC110 and the AC800M Modbus programming. You've probably missed something simple but not obvious.
Verify all your speed, parity, stop bit, protocol settings etc.
Check the various transmit and receive lights on both the AC800M and the AC110.
If you have some transmit and receive activity on the link then use a modbus message simulator and troubleshooting tool like ModSim or modbus tools