计算机指令发送到PLC、以什么样的格式进行通信、该如何进行通讯、以及设置的通信语言

利用MSComm 控件进行通信程序设计主要包括初始化程序、和校验函数、发送和接收数据三个部分-Computer commands sent to the PLC, what kind of format to communicate, how to communicate, as well as the communication language setting controls the use of MSComm communication programming including initialization procedures, and calibration functions, send and receive data in three parts