hello people...i am new here, i am working on a project where i have to controll subsea pump with the help of siemens plc by establishing modbus communication....we have got new cpu 315-2 dp from siemens with integrated ethernet module ... but problem is that when i download hardware from S7 to CPU it gives connection error...same when i download program to cpu it says that "incompatible adapter version or wrong adapter type connected", i think that Pc adapter i have is older and is not compatible with this new cpu....has anybody any answer to it? should i buy new adapter or what?