F3406a

在线咨询买家必读:

一、店铺所有价格均不是实价，如需了解产品价格，请联系在线客服。

二、现货付款当日发货；期货从付款日起开始计算时间，货期不含国内外节假日。

三、买家通过快递或物流签收货物后，若有异议，请在收到货物当天内提出。

1、下单前，买家需向卖家确认价格和货期；若买家单方面下单，则订单视为无效；

2、下单后,买家不得更改产品品牌，规格型号以及数量、单价等，因买家提供产品规格型号错误而造成错误订货的，卖家不负责更换货品、退货、退款等，也不承担因此造成的损失；

3、下单后，若无质量问题，不接受无理由退/换货、退款;

4、因此产品生产厂家停产、升级无3C、涨价、受限制造成无法订货，则订单取消，卖家不承担任何相关法律责任；

5、因自然天气、运输货运、政法政治原因等非卖方所能控制之客观因素导致货期延误，卖家不承担任何相关法律责任，由买卖双方协商订单是否依旧生效。

请各位买家知悉相关条款，如有异议，请咨询解决相关疑问！

As for the power supply, the power supply of PLC not only supplies power to PLC itself, but also supplies power to external instruments. In addition, the number of I / O modules (or expanded I / O modules) of PLC itself changes, so the change of load is relatively large. In terms of planning, we can only think according to the biggest consideration. However, because the power supply is a power equipment, it is easy to heat up. The temperature rise of the power equipment will further affect the functions of other surrounding equipment, especially when the over-current or over-voltage condition exists, it will burn out the components. However, if the margin is too large, the cost will be added a lot, Power supply module is a relatively easy to show some of the fault. In general, the problem to be solved is not only to select high-quality equipment, but also to consider a large enough margin in terms of planning at the expense of some costs.

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.