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PLC(Programmable Logic Controller可编程逻辑控制器)是摸仿原继电器控制原理发展起来的,并在近几年逐步取代传统继电器控制装置,在各类工业自动化控制中得到广泛应用,具有良好的发展态势。它的主要优点是使用方便,可靠性高,故障率低,但购买成本比较高,一旦发生故障,原因不容易直观判断,导致修理人员往往无从下手,或判断失误导致问题扩大化。针对上述情况,介绍了可编程逻辑控制器在汽车式、塔式、龙门式起重机控制系统中的应用情况及原理。重点分析了可编程逻辑控制器故障实例的处理方法和思路。经过实际修理中的实践和总结,所介绍的方法能够有效解决电力起重机械PLC的电源系统、CPU系统及I/O模块系统等常见故障,力求为读者在实际机械修理过程中提供科学的参考依据和技术支持。可推广到其它由PLC控制的机械和设备。
PLC (Programmable Logic Controller) is to imitate the original relay control principle developed, and in recent years gradually replace the traditional relay control device, in various industrial automation and control has been widely used, has a good momentum of development . Its main advantage is easy to use, high reliability, low failure rate, but the purchase cost is relatively high, in the event of failure, the reason is not easy to judge intuitively, resulting in repair personnel often unable to start, or misjudgment caused the problem to enlarge. In view of the above situation, introduced the programmable logic controller in the car, tower, gantry crane control system applications and principles. Focus on analysis of programmable logic controller failure examples of treatment methods and ideas. After the practice and summary in the actual repair, the presented method can effectively solve the common faults such as power system, CPU system and I / O module system of PLC, and strive to provide readers with scientific reference in the actual mechanical repair process. Basis and technical support. Can be extended to other PLC-controlled machinery and equipment.