对于Modbus通讯来说，怎么样方便的测试通讯很有价值。用自己写的代码很麻烦。这个测试软件，基本上解决了一般的Modbus通讯的测试问题。值得推广。-Modbus communication for example, how to facilitate the testing of communication very valuable. Write their own code is cumbersome. The test software is basically to solve the