PLC在处理模拟量、数字运算等各方面能力都已大幅提升,成为工业控制领域的主流控制设备,在各行各业发挥着越来越大的作用,而采用PLC可编程控制程序的综合保护装置,它能够为自动化控制应用提供安全可靠和比较完善的解决方案,适合于当前电力行业对自动化的需要,目前,PLC在国内外已广泛应用于钢铁、化工、电力、机械制造、交通运输等各个行业。 PLC in dealing with analog, digital computing and other aspects have greatly improved their capabilities to become the mainstream of industrial control field control equipment, in all walks of life to play an increasingly important role, and the PLC programmable control program integrated protection device , Which can provide safe, reliable and perfect solutions for automation and control applications. It is suitable for the current automation needs of the power industry. At present, PLC has been widely used in various fields such as steel, chemical, electric power, machinery manufacturing, transportation, etc. industry.