1784-CP6

1784-CP6

1784-CP6

尽管梯形图与继电器电路图在结构形式、元件符号及逻辑控制功能等方面相类似，但它们又有许多不同之处，梯形图具有自己的编程规则。

1）每一逻辑行总是起于左母线，然后是触点的连接，最后终止于线圈或右母线（右母线可以不画出）。注意：左母线与线圈之间一定要有触点，而线圈与右母线之间则不能有任何触点。

2）梯形图中的触点可以任意串联或并联，但继电器线圈只能并联而不能串联。

3）触点的使用次数不受限制。

4）一般情况下，在梯形图中同一线圈只能出现一次。如果在程序中，同一线圈使用了两次或多次，称为“双线圈输出”。对于“双线圈输出”，有些PLC将其视为语法错误，绝对不允许；有些PLC则将前面的输出视为无效，只有最后一次输出有效；而有些PLC，在含有跳转指令或步进指令的梯形图中允许双线圈输出。

现货，现货，降降降，火火火，火火火……

现货，现货，降降降，火火火，火火火……

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◆ 企业名称：厦门泰尼电气有限公司

◆ 联系人： 小廖（女士）

◆ 电话：0592-6539066
   
◆ 手机：18965113601 

◆ 传真：0592-6890859

◆ QQ:1490371370

诚信经营，质量为首，服务至上，厦门泰尼小廖竭诚为您服务！！！

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