本人最近为了实现电脑与Delta VFD-M变频器通讯，特意用VB6.0编了一个Modbus协议通讯软件，不过这只是一个测试版，但Modbus的ASCii协议和RTU协议都已经实现。-Recently I had a computer in order to achieve Delta VFD-M inverter communications, specially prepared using VB6.0 a Modbus protocol communications software, but it is only a test version, but the Ascii Modbus protocols and RTU agreement has been achieved.