基于VB和三菱编程口协议的PLC工控系统通信设计  

The communication design of PLC industrial control system based on VB and Mitsubishi programming interface protocol

作　　者：王希望[1] 孙小华[2] 王福顺[1] 

机构地区：[1]河北农业大学信息科学与技术学院,河北保定071001 [2]河北软件职业技术学院数字传媒系,河北保定071000

出　　处：《河北农业大学学报》2013年第4期115-119,共5页Journal of Hebei Agricultural University

基　　金：河北省科技计划项目(11212144);保定市科学技术研究与发展计划项目(12ZN020)

摘　　要：通过分析目前被广泛应用的PC机+触摸屏+PLC的监控系统的串行通讯设计,提出了一种基于VB6.0和三菱编程口协议的串行通讯的实现方案。该方案不需外加三菱的专用通信板,实现了简单硬件连接下的快速稳定的串行通讯,而且不需对PLC的D8120进行设置,简化了PLC程序;在三菱通讯口协议下应用VB6.0编写的串行通讯程序适应于FX全系列PLC,使PC机可直接对PLC的软设备进行读/写、强制置/复操作,在实际应用中无论通讯的准确性和稳定性均达到工控系统要求。By analyzing the current serial communication, used in a popular monitor system composed of PC, GOT and PLC, a new design and implementation plan of serial communica- tion was introduced based on VB and programming interface protocol. The system achieved the efficient, stable and reliable communication under simple attachment without any Mitsubishirs special communication board. The communication applied Mitsubishi FX series PLC program- ming interface protocol, no longer need to set up the D8120, simplified the PLC program; Un- der this protocol and based on VB6.0 development environment, the serial communication pro- gram adapted to FX full series, and the program made the PC read/write the PLC soft equip- ment and forced ON/OFF directly. In the actual application, both accuracy and stability of communication reached the requirements of industrial control system.

关 键 词：串行通讯 三菱编程口协议 VB6 0 PLC 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]