MK14A-X020
MK14A-X020
MK14A-X020
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）每一逻辑行是起于左母线，然后是触点的连接，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，不允许；有些PLC则将前面的输出视为无效，只有后一次输出有效；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。
◆ 企业名称：厦门泰尼电气有限公司
◆ 主营业务：DCS,PLC
◆ 经营模式： 贸易
◆ 贸易地区：
◆ 联系人： 小黄《女士》
◆ 电话：
◆手机：
◆ QQ:2917675397
◆ 传真： （备注“01006”收）
◆ E-mail： 2917675397@qq.com
GIDDINGS & LEWIS TRUEVIEW 3390TH
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Expedited shipping available
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Expedited shipping available
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Expedited shipping available
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871-20695-01
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