BENTLY 3500/45

主营产品，备件供应，充足库存

Foxboro（福克斯波罗）：I/A Series系统，FBM全系列（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。

Westinghouse（西屋）：1C31系列DCS系统、CPU、OVATION系统、WDPF系统、

WEStation系统备件。

Triconex（英维思）:冗余容错控制系统、基于三重模件冗余（TMR）结构的现代化的容错控制器。

EMERSON（艾默生）:模块、卡件、驱动器等各类备件。

Some of the communication, PLC in the use of some of the most customer complaints, PLC communication generally has a serial port (RS232, RS485), Ethernet, and industrial field bus network port. Because most of these communication methods come from personal computers, many standard communication interface standards are not very suitable for industrial field, such as voltage level, fault tolerance rate and so on. Therefore, the communication port presents the probability comparison of the problem. From the perspective of product planning, it is a very challenging task that how to enhance the adaptability of communication port to the outside world through the planning of software and hardware, and how to reduce the external interference to PLC internal communication through adopting various anti-interference methods. What's more, since it's communication, it must involve protocol issues, and it will also involve the other party of communication, such as computer, human-machine interface, other PLC, frequency converter, field intelligent instrument or intelligent equipment, etc. many communication failures are caused by the problem of communication object or communication parameter setting, rather than the real failure of PLC, This is to test the level and experience of the technicians who are responsible for debugging in the device and use of PLC.
Although the proportion of connector in the cost of PLC is not very large, it is the component that often presents fault in the process of using PLC. Poor touch is the most common phenomenon. Even if the terminal of PLC is well planned, if the user is not very careful in wiring, it will also present the problem of poor touch. If the identification of the terminal is not very clear and eye-catching, maybe the wiring personnel will be distracted, and the wrong line will be connected. If the strong current is connected to the signal terminal, the damage of PLC will be formed immediately.
From the aspect of planning, the planning of PLC terminals is also very careful. Not only the terminals with outstanding touch function should be selected, but also the use status of industrial site, the durability of terminals, and the convenience of connecting terminals in installation, debugging and repair should be considered. In addition, the identification of terminals is often ignored by many PLC manufacturers. How to think about the identification of terminals humanely is to test the psychological common sense level of PLC planners.