According to the operation of RS485 communication net and computer real time control to multi purpose monitoring system,this paper analyses the structure design of high speed shock durability test system on auto alternator and describes the characteristics of operation mode in Windows 98 platform.

PC monitoring system on RS485 communication;

Universal multifunction and multiport serial card MOXA CP-134U Series V2 is used in this system based on RS485 communication.

The frequency-variable speed regulation system for glass strand winders is described,and the use of RS485 communication of PLC to control Danfoss inverters discussed.

KTC5 type network communication control devices on the coal face;

Research on technologies of network communication and control between NC machines of economical type;

Software design of network communication system for medical video under embedded platform;

The article explains the control system and realization on Baotou Steel seamless steel pipe 180mm heat treatment production line water quenching equipment, includes equipment constitution, process flow, control system model selection, HMI human-computer interface, net communication etc contents.

The data communication function between the NC machine and the computer was realized via RS-232 serial interface in this net communication system of NC machine.