The hardware of the PLC controller itself adopts a building block structure,and the product structure of each manufacturer is similar.Taking Japan’s Omron C200HE as an example,it is a bus template frame structure.The basic frame(CPU motherboard)is equipped with a CPU template,and other slots are equipped with I/O templates;The O expansion cable is connected to the I/O expansion motherboard,and the I/O module is installed on it;another method is to equip the remote I/O slave station,etc.All of these show that PLC manufacturers develop all hardware components to users,which is convenient for users to choose and configure them into PLCs of different scales,and the openness of this hardware configuration is beneficial for manufacturers,distributors(agents),and system integrators.,The end user brings a lot of convenience,and it brings a lot of convenience to the marketing supply chain,which is a great success experience.
PLC控制器本身的硬件采用积木式结构,各厂家产品结构大同小异。以日本欧姆龙C200HE为例,为总线模板框式结构,基本框架(CPU母板)上装有CPU模板,其它槽位装有I/O模板;如果I/O模板多时,可由CPU母板经I/O扩展电缆连接I/O扩展母板,在其上装I/O模板;另一种方法是配备远程I/O从站等。这些都说明了PLC厂家将硬件各部件均向用户开发,便于用户选用,配置成规模不等的PLC,而且这种硬件配置的开放性,为制造商、分销商(代理商)、系统集成商、最终用户带来很多方便,为营销供应链带来很大便利,这是一大成功经验。
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