四层杂物电梯plc控制外文翻译-plc设计(编辑修改稿)

四层杂物电梯plc控制外文翻译-plc设计(编辑修改稿)内容摘要：

he use of modern largescale integrated circuit technology, strict production process, the internal circuit adopts advanced anti interference technology, has very high reliability. Such as the Mitsubishi F series produced by PLC MTBF is high up to 300000 hours. Some use of redundant CPU PLC MTTF mean time to failure is longer. From the PLC machine circuit, the use of PLC control system, and the same scale relay systems, electrical wiring and switch contacts have been reduced to hundreds or even thousands of fault, also reduced greatly. In addition, PLC with hardware fault self testing function, failure can be timely warning information. In the application software, applications can also be incorporated into the peripheral device fault diagnosis program in the system, except PLC circuit and equipment were also obtained self diagnosis of fault protection. Thus, the entire system with high reliability is also not surprising. Two, matching plete, perfect function Applicability of PLC development today, has formed a large, small scale, in various series of products. Can be used for various scale industrial control occasions. In addition to the logic processing function, modern PLC mostly with plete data operation ability, can be used for various digital control field. In recent years the function of PLC cells in large numbers, the PLC perated into the position control, temperature control, CNC and other kinds of industrial control. With PLC munication and enhance the ability of manmachine interface technology, using PLC posed of various control system has bee very easy. In three, easy to learn and use, by the engineering and technical personnel are wele to PLC as general industrial control puter, is the industrial and mining enterprises in the industrial equipment It interfaces easily, easy programming language for engineering and technical personnel to accept. Ladder diagram language symbols and expressions and relay circuit diagram are quite close, only a small amount of PLC switching logic control instructions can conveniently realize the function of relay circuit. To be familiar with electronic circuits, not understand puter principle and assembly language people use puter in industrial control opened convenient ways. Four, system design, build small workload, convenient maintenance, easy to modify PLC memory logic instead of logical connection, greatly reducing the control equipment external connection, so that the control system design and construction period is shortened greatly, at the same time also bees easy maintenance. It is more important that the same equipment after changing the program changes in the production process as possible. It is suitable for many varieties, small batch production. In five, small volume, light weight, low energy consumption to ultra small PLC for example, recent production of varieties is smaller than100mm, the weight is less than 150g, only a few watts of power. Because of the small size easily loaded into internal machinery, is realizes the integration of machinery control equipment. Debris elevator is introduced Service in the specified floor ( generally highest at eight layer below the fixed lifting equipment ). It has a car, its size and structure, the car is not allowed。