BENTLY 330780-50-00

【主营产品】prefix = "o" ns = "urn:schemas-microsoft-com:office:office"

主营：世界知名品牌的PLC、DCS系统备件 模块

①Allen-Bradley(美国AB)系列产品》

②Schneider(施耐德电气)系列产品》

③General electric(通用电气)系列产品》

④Westinghouse（美国西屋）系列产品》

⑤SIEMENS(西门子系列产品)》

⑥销售ABB Robots. FANUC Robots、YASKAWA Robots、KUKA Robots、

Mitsubishi Robots、OTC Robots、Panasonic Robots、MOTOMAN

Robots。

⑦estinghouse（西屋）： OVATION系统、WDPF系统、MAX1000系统备件

。

⑧Invensys Foxboro（福克斯波罗）：I/A Series系统，FBM（现场输入

/输出模块）顺序控制、梯形 逻辑控制、事故追忆处理、数模转换、输入/

输出信号处理、数据通信及处理等。Invensys Triconex: 冗余容错控制

系统、基于三重模件冗余（TMR）结构的zui现代化的容错控制器。

⑨Siemens(西门子)：Siemens MOORE， Siemens Simatic C1，Siemens

数控系统等。

⑩Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动

模块等。

◆Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。

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The mechanical structure of PLC is mainly shell and bottom plate. Not only the connection and fixation of internal circuit board, communication interface and terminal, but also the heat dissipation of PLC, the prevention of external dust, water vapor and impact, and the shielding of oscillation and even electromagnetic interference should be considered. In addition, structure planning is the primary manifestation of product appearance. Therefore, product structure planning not only needs to understand all kinds of electrical and mechanical knowledge, but also needs to consider the usage habits of on-site users, and also needs to have enough artistic accomplishment.
Software, from the perspective of development, to complete all the functions of PLC has been a very huge system engineering, and some of these jobs in the entire PLC system software planning and programming, originally only a small part of all the workload. Others, mostly around the reliability aspect, software planning and programming. Software reliability planning, first of all to think about PLC in normal operation of various possible emergencies, to carry out fault-tolerant planning. Because PLC directly deals with all kinds of hardware, including CPU address, data, register, cache, and external input and output control, and many hardware will have different changes due to various influences. Therefore, the internal fault-tolerant processing is already a large workload, and there are no certain rules and precedents to follow in these aspects of programming, It all depends on experience. In addition, there are some external environmental impacts, such as electromagnetic interference, temperature change, signal fault, communication fault, overrun change of all kinds of signals, and human operation faults, such as programming fault, wiring fault and operation fault; We must carry out the necessary fault-tolerant planning, which depends on the accumulation of experience.