Note - PLC choice

to first choose PLC according to the technological requirements of party a and lovely girl, as much as possible to ensure smooth operation, reliable, safe and practical, convenient debugging, easy to maintain. I give a few need to pay attention to the places, the hope can help you

1 PLC controller manufacturers choose

the father have what demand of party a, the designers of different brand familiarity, the unity of form a complete set of equipment

2 input/output point estimate ( Digital and analog)

according to party a's dad give control equipment combined with twenty percent 30即可，流出点富余量，给甲方爸爸突发奇想的空间

　　3程序的存储量

　　程序卡的内存，尽量大点，其他钱都花了，这点钱也不算什么，当然别太邪乎了，大个一个等级就行了

　　4通讯模块的选择

　　点对点，现场总线，工业以太网

　　5机型的选择

　　如西门子300，400，s1200，s1500，根据你现场的控制难易程度，响应时间和现场环境决定

　　6模块的选择

　　这个主要是看你控制的什么设备，温度，流量，液位等等不同需要，安装不同的模块，这个要看工艺要求了

　　7一般性原则

　　A方便性，根据现场要求选择PLC模块，比如西门子输出模块有继电器型和晶体管，晶闸管型，选择正常的模块，可以减少其他电气配件

　　B通用性，在满足工艺要求，尽可能跟现场其他设备所使用的PLC同步，减少后期备件存储量，而且可以提高故障出现时的可替换性

　　C兼容性，如需要和其他PLC进行通讯，尽量选择一致性设备，减少转换模块的使用，每多增加一个模块就是故障率的升高和成本的增加。

As a entrepreneur, being trapped in a company under multiple quality problems never appealed to Shenzhen Coolmay Technology Co., Ltd. .
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While the productivity and efficiency benefits of automation are unequivocal for manufacturing plc manufacturers, the need for skilled humans to operate, utilize and advance technologies is equally unmistakable.