需要使用完整连接的零调制解调器电缆实现两台冗余 WinCC 服务器之间的串行连接。下面的管脚必须连接到一起:
连接器1 |
连接器2 |
|||
管脚 | 定义 | Coection | 管脚 | 定义 |
1 6 |
DCD (Carrier Detect) DSR (Data Set Ready) |
with | 4 | DTR (Data Terminal Ready) |
2 | RxD (Receive Data) | with | 3 | TxD (Transmit Data) |
3 | TxD (Transmit Data) | with | 2 | RxD (Receive Data) |
4 | DTR (Data Terminal Ready) | with | 6 1 |
DCD (Carrier Detect) DSR (Data Set Ready) |
5 | GND (Ground) | with | 5 | GND (Signal Ground) |
7 | RTS (Request to Send) | with | 8 | CTS (Clear to Send) |
8 | CTS (Clear to Send) | with | 7 | RTS (Request to Send) |
表1: Sub-D型母连接器(9针)
这根电缆可以使用后面的 MLFB 号订货:6ES7902-1AC00-0AA0。
注意
确认两台计算机上的 COM口的参数(波特率,数据位,奇偶校验,停止位和流控制)一致。可以根据需要选择上述参数。
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