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