本源码是一个信捷PLC与电脑主机通过COM或485中通讯的程序，界面简单，只做了一个试验，有些功能还没有完善。能读写PLC内部寄存器。-This source is a Nobukatsu PLC and the host computer through the COM or 485 communications program, the interface is simple, only a test, some features not yet perfect. Can read and

一个关于VB到信捷PLC的RS232通信程序。自动生成校验，作为交流用的程序。可作参考-a program about vb to xingetPLC with RS232.with a CRC function.