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数据采集系统中Modbus协议的实现
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2009-06-16
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本文主要介绍了Modbus 通信协议。给出了单片机RS-485 通信电路的设计方案。阐述了在VB6.0 编程环境下通过RS-485 总线实现主控台PC 机对智能仪表的控制。并且指出了在软件设计方面需要注意的问题。
关键词：Modbus 协议；RS-485；串行通信;智能仪表
Abstract:This paper represents Modbus Protocol. The design of Rs-485 interface circuit is presented too.The methods of how to control the intelligent instrument by pc using RS-485 serial port is described through the VB6.0.And it also points out the questions which should be paied attention to in sofeware design.
Keywords: Modbus Protocol;Rs485;serial communication；intelligent instrument
关键词：Modbus 协议；RS-485；串行通信;智能仪表
Abstract:This paper represents Modbus Protocol. The design of Rs-485 interface circuit is presented too.The methods of how to control the intelligent instrument by pc using RS-485 serial port is described through the VB6.0.And it also points out the questions which should be paied attention to in sofeware design.
Keywords: Modbus Protocol;Rs485;serial communication；intelligent instrument
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