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用通讯网络代替以往的硬电缆连接,在国内很多时候被认为不好维护的方式。因为一旦发生故障,常规工人会不知如何下手,而要求电气维护人员具备的不仅是常规电气知识,还必须具有自动化知识和网络知识。
1756-DMD30 AB PLC
但网络的优点是无可比拟的,系统越大越体现出网络的优势:
1.设计简单,减少设计时间和设计出错的可能性;
2.减少现场控制柜之间的控制电缆数量,使施工变得简单;
3.减少了柜间控制电缆的校对工作,使调试过程大大缩短;
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