用C++写的modbus串口通讯程序，供大家学习参考-C wrote Modbus serial communication program for all learning reference

可用于测试MODBUS 设备，透过MODBUS的协定和其他的设备交换资料-For Test Modbus equipment

PLC通信调试模拟器，有接口文件，调用接口文件可以对PLC通信、模拟编程(PLC communication debugging simulator, with interface file, calling interface file can communicate with PLC and simulate programming)