单台微机通过RS-485网络控制多台PLC的实现

To Control Multiple PLC With A Computer by The Net of RS-485

介绍了H -系列PLC与上位机的通讯方法 ,控制命令及应答格式。利用VB6 .

The paper introduced the method of communication between H-series PLC and a computer ,control command style and style of response to superior machines control command.