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XXXXX. XXXXX. 知识点八 LDP 、 LDF 、 ANDP 、 ORP 、 ORF 指令指令. 知识点八 LDP 、 LDF 、 ANDP 、 ORP 、 ORF 指令指令. LDP 、 LDF 、 ANDP 、 ANDF 、 ORP 、 ORF 指令. 1. 指令格式. 2 .指令说明. LDP 、 ANDP 、 ORP 指令是进行上升沿检出的触点指令,仅在指定位元件的上升沿时( OFF → ON 变化时)接通一个扫描周期。.

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  1. XXXXX XXXXX 知识点八 LDP、LDF、ANDP、ORP、ORF指令指令

  2. 知识点八 LDP、LDF、ANDP、ORP、ORF指令指令 LDP、LDF、ANDP、ANDF、ORP、ORF指令 1. 指令格式

  3. 2.指令说明 LDP、ANDP、ORP指令是进行上升沿检出的触点指令,仅在指定位元件的上升沿时(OFF→ON变化时)接通一个扫描周期。 LDF、ANDF、ORF指令是进行下降沿检出的触点指令,仅在指定位元件的下降沿时(ON→OFF变化时)接通一个扫描周期。

  4. 3. 应用举例 X000-X002由OFF→ON变化或由ON→OFF变化时,M0或M1仅接通一个扫描周期。需要指出的是这些指令的功能有时与脉冲指令的功能相同,另外,在将辅助继电器M指定为这些指令的软元件时,软元件编号范围不同,会造成动作上的差异。

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