本文主要介绍Modbus RTU 规约,及在VB6.0 编程环境下通过RS-485 串口实现主控台PC 机与智能仪表间基与该规约通信的具体实现方法。关键词:Modbus RTU;通信协议;RS-485;CRC 校验Abstract:This article focus on the protocol of Modbus RTU ,and just introduce the method to realize the communication between PC and the intelligent instrument based on the Modbus protocol.And the aim is realized through the VB6.0 and used the RS-485 serial port.Key Words: Modbus RTU; communication protocol ; RS-485;CRC justment
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