现在有一个PC通过232/485转换器连接到485总线,总线串了6个PLC的PPI接口,当前通讯速率为19.2k.
我想提高速率到187.5k,但是STEP WIN提示
you are downloading a system block that will change the plc baud rate that is not supported by the attached device. ...
网上查了下说PPI也是支持187.5k通讯的,但是可能电缆不支持,我不太明白电缆支持速率PLC也能知道?
请高手解惑。