论文部分内容阅读
在自由口模式下,用户可以自己定义用于通信的指令格式。本文以自由端口模式下PC与S7-200型PLC之间的通信为例,介绍了如何用Visual Basic编程来实现读/写指令的发送。
In Freeport mode, users can define their own command format for communication. This article takes the communication between PC and S7-200 PLC in Freeport mode as an example to show how to use Visual Basic programming to realize the sending of read / write commands.