communication with control logix

hi everybody
can any one tell me the procedure how to communicate wincc flex 6.0 with control logix using opc .ch i am getting problem to communicate with wincc can any one gude me the procedure how to link winncc with opc.ch.thank u

First of all, naked CLX does not support OPC communication. For this you need an additional gateway like RSLinx which exchanges data with the CLX and provides the OPC server. With this one in place you can access every controller scope tag via OPC. There are different solutions, how complex is your system?