电气化区段PLC站内移频轨道电电码化于1996年12月通过了铁路局技术鉴定。该设备采用PLC可编程控制器作为装置的核心,由电子开关单无、移频机车信号、移频轨道电路、自动转换电路、故障报警显示单元等组成。该装置控制可靠,抗干扰能力强,并有自诊断和掉电保护功能,当电源临时掉电时不会打断运行前的程序;使用梯形图语言,编制程 Electrified section of PLC station frequency shift track electric code in December 1996 passed the Railway Bureau of technical appraisal. The device uses PLC programmable logic controller as the core of the device by the electronic switch single, frequency shift locomotive signals, frequency track circuit, automatic conversion circuit, fault alarm display unit. The device is reliable control, anti-interference ability, and self-diagnosis and power-down protection function, when the power temporary power-down will not interrupt the program before running; using ladder language, programming