本文介紹了以松下FP1 小型機系列PLC 為對象的模擬仿真軟件的設計與實現(xiàn)，提出采用面向對象和多線程運行機制的系統(tǒng)實現(xiàn)方法。在單臺電腦上，能模擬PLC 編程、實際運行和外部信號輸入控制，并動態(tài)監(jiān)視運行情況。編程環(huán)境使用C++ Builder，應用軟件界面采用松下PLC 編程軟件界面，并與windows界面相一致，方便用戶操作，極大地方便了PLC 教學實驗和PLC 的離線調(diào)試。對其它類似PLC 模擬系統(tǒng)的設計也具有參考價值。
關鍵詞：松下PLC；模擬仿真；C++ Builder；多線程；面向對象

Abstract: software for simulation and emulation of Matsushita FP1 series PLC is developed.
Advanced a realization method of object oriented and multi-thread running. On single personal computer，simulating input-signal control and monitoring of programming, debugging， and running of PLC are realized. The programming environment is C++ Builder, and the interface of application software is compatible with Matsushita programming software and Microsoft windows. It is convenient to teaching, experiment and offline debug of the PLC. Besides, it has reference value to similar problems.
Key words：Matsushita PLC, Simulation, C++ Builder, multi-thread, object –orient