By analyzing the technology transform demands and control principle of the air compressor station,a detailed design plot of air compressor station control system based on FX serial PLC,inverter and MODBUS communication is introduced,including hardware design,program design,and communication realization,etc.

The paper proposed a design scheme of Modbus RTU communication based on CP341,gave the selection and configuration of hardware and software,and introduced the design of data communication program between CP341 and intelligent sensor.

Design on the serial communication of the measuring and controlling systems for the hydraulic pressure and rotate speed in the friction welding machine;

Implementation of serial communication between personal computer and C8051F000 in sampling of heart sound;

Parameter setting of DSP-based servo system via serial communication;

The thermal parameters monitoring system of industrial mini-steam turbine was developed, which was based on serial port communication.

0 to design the serial port communication program.

Then it discusses in detail the steps of realization and part of functions of developing the serial port communication program under eMbedded Visual C++4.

The program design of series communication between PLC and computer;

The system uses communication interface such as RS-232 to accomplish series communication between PC and data acquisition machine,which realizes real-time acquisition and supervision of the motion parameters of vehicle and data analysis under support of the database system in order to achieve the evaluation of auto-braking performance.

Power Builder is one excellent toolkit of establishing application system of database, but it did not provide the command, function and control of series communication.