基于三菱FXPLC的感应淬火机床与PC机的串行通信实现

The realization of serial communication between PC and induction quenching machine based on MITSUBISHI FXPLC

针对感应淬火机床工作,以PC机和三菱PLC构成监控系统,介绍了三菱FX3UPLC的一种通信协议,在无需PLC编写通信指令的前提下,用C#编程实现PC机直接读写PLC的数据寄存器D区。设计了一个通信流程,实现了写电源参数、修改工艺参数、采集PLC数据。经过实际测试,通信方式稳定可靠,采集频率快,有效地减少编程工作量,满足了感应淬火机床的要求。

In view of the induction quenching machine work,the monitoring system consists of the PC and MITSUBISHI PLC. This paper introduces a communication protocol of MITSUBISHI FX3UPLC,on the premise that PLC is required to write instructions,using C# programming to achieve PC directly reading and PLC＇s D memory writing. This communication process makes it possible to realize the power supply parameters,modify the process parameters and acquire PLC data. After practical test,it proved that the communication method was stable and reliable,with faster acquisition frequency,effectively reduced the workload of programming so that can meet the requirements of induction quenching machine.