SORRY MY ENGLISH NO IS GOOD BUT I TRY TO COMUNICATION WITH US, I HAVE TWO PROBLEMS THE FIRTS IS IT, WHEN I EREASE ONE SLAVES OF THE NET DP IN THE CPU APPEAR ALARM DVS HOW EREASE THIS ALARM AND THE SECOND PROBLEM I BUY A ONE LAPTOP BUT DON´T BRING SERIAL CONECTION FOR TO COMUNICATION WITH MY PLC S5 THE ANSWER IS IT, HOW CAN I COMUNICATION OR WHAT MUST I BUY FOR COMUNICATION, SOMEONE HELP ME, THANKS ALL US.