S7-300PLC控制ACS800变频器程序，通过Profibus-DP协议实现变频器的控制，包括常用的调速、启停数据传输，远程监控等功能-S7-300PLC ACS800 drive control program for control of the inverter via Profibus-DP protocol, including the commonly used speed, start and stop data transmission, remote monitoring

TCP -传输控制协议,提供的是面向连接、可靠的字节流服务 UDP -用户数据报协议，是一个简单的面向数据报的运输层协议.-TCP - Transmission Control Protocol, provided that the connection-oriented, reliable byte stream service UDP - User Datagram Protocol, is a simple datagram-oriented transport layer protoc