PLC有一路232连接人机界面，一路485-RTU连接变频器，如何可以同时监控PLC
可以 去看看https://blog.csdn.net/olklj/article/details/132021088?csdn_share_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22132021088%22%2C%22source%22%3A%22olklj%22%7D