1320Modbus通讯协议中校验码的计算方法

The Algorithm of The Mobus Communication Contract's Checking Codes

简介了Modbus通讯协议的基本内容,详细论述了两种冗余校验:循环冗余校验（CRC）和纵向冗余校验（LRC）码的计算方法,并给出了以MCS-51单片机为例的汇编语言源程序。

The article introduced the basic content of the Modbus communication contract. It describes in detail two redundancy check: circle redundancy check and longitudinal redundancy check. It also provides the flow char and program based on MCS-51 chip microcomputer.