tp170a與fx1s的通信電纜圖
hmi設(shè)備                          fx1s PLC
3(TXD+) ---------------------------------------------------2(RXD+) 
8(TXD-) ----------------------------------------------------1(RXD-) 
5(GND) ----------------------------------------------------3(GND) 
4(RXD+) ---------------------------------------------------7(TXD+) 
9(RXD-) ----------------------------------------------------4(TXD- )