Practice proves that the full PLC has carried out all monitoring functions taking PLC as the core, and overall application of bus technique.

The paper describes safety PLC and analyzes of safety & reliability in the safety PLC related system according to the international standard EN/ISO 13849-1.

In BIW(Body in White) welding line,applying multi-PLC in hardware structure to divide up the control task of the whole line,using multilevel field-bus network to assign specific mission to PLC and robots,and using safety PLC to collect and operate a mass of safe signals can improve the standardization and modularization of the robot welding line greatly.

The application of PLC and configure software in minitype automated storage system is introduced in this paper,citing the FX-2N series programmable controller.

The programmable controller and the technique of software isolate mask the wrong input information and ensure the experiment platform running safely, and system will hint or alarm when information is input.

Choice of type,I/O module,Programmable controller and outer device,and control system structure and way is introduced in Programmable control system;System is designed to achieve low cost,high reliability, simple protection so that it can satisfy need automatic control system.

PLC(programmable logic controller) is an important method and basic equipment in industrial control.

Key words: PLC(Programmable Logic Controller); touching screen; twisting;controllingprocedureAbstract: In this article, a simple and convenient controlling measure with PLC andtouching screen is introduced, which is about the twisting procedure of thefiber glass.

The application of PLC(Programmable Logic Controller)and touch-sensitive screen technology to the control system of rubber dam is described,and then a remote automatic control system of the dam is designed;for which the composing structure,working process and the control process of PLC ladder diagram with the design of the touch-sensitive screen human-computer interface are analyzed as well.

In view of CaC2 furnace system with coupled three-phase current and the control feature of PLC,a fuzzy-control method based on programmable logic controller(PLC) is proposed.

This article introduce the configuration and characteristic of OMRON minitype Programmable Logic Controller(PLC),and put forward the control system to demand the control of Packaging and food machinery and Water chiller,and introduce the function of software.

A new advanced scheme for power,which can be remote controlled and data collected by microcomputer,real time controlled by programmable logic controller(PLC) technology,and exactitude adjusted b.

Lathe performance is improved by using full-digital DC speed regulating device and programmable logic controller.

THIS PAPER PRESENTS THE PROGRAMMABLE LOGIC CONTROLLER (PLC) USED IN CONVERTER FIRST DUST CATCHER FAN MOTOR AND COAL GAS CALLBACK SYSTEM,ANALYSIS AND STUDY ON THE PROBLEMS OCCURRED DURING THE TEST AND PRODUCING COURSE ARE MADE,SUGGESTION FOR IMPROVEMENT ARE PROPOSED.

For insuring the safely running of axial compressors,an independent monitoring and control system is designed which is composed of a programmable logic controller,an intelligent controller,regulative valve and measuring instruments.