【摘要】 针对PLC控制系统输入/输出端口略不足的情况,从外部硬件扩展、内部软件编程、系统设计思路等方面提出低成本扩充PLC输出触点的10种办法,有效减少了输出触点数量.更多还原

【Abstract】 For the slightly insufficient conditions of input/output ports of PLC controlling system,ten methods to expand programmable logic controllers’(PLC) output contacts in a low cost are presented,which are based on external hardware expansion,internal software programming and system design etc,these reduce effectively output contacts.更多还原