大家好，我是新手，我有一問題請教大家，海泰克觸摸屏PWS6700T與三菱PLC連機有問題，出通訊COM1異常，這是怎么回事，請教，，
是連線問題吧，我制作一條線，25母觸摸屏端   TXD 14------------2  RXD   PLC端三菱FX1N8針 公
                                                                                       TXD15 -------------1 RXD
                                                                                        RXD16--------------7 TXD
                                                                                       RXD17---------------4TXD
                                                                           17與21相連            3 SG