The principle and logic program of railway special line computer interlocking system made of PLC are introduced in the paper, the safty of the system is also analyzed.
介绍由PLC构成的铁路专用线车站联锁系统的原理和逻辑编程步骤，并分析了系统的安全性。
Starting speed is unsmoothed in the traditional electrical drive system, which causes the belt off tracking or split and even safty accident.
由于传统带式输送机电气系统的启动加速度不平稳，容易引起皮带跑偏甚至撕裂皮带，造成安全事故，影响生产。
Precise time-service is the safty insurance in the military, electric power, communications, transportation and other industry security system operation.
高精度授时是军事、电力、通信、交通等各行业系统运行的安全保障。
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