廈門市泰尼電器有限公司
主營產(chǎn)品: AB模塊PLC |
廈門市泰尼電器有限公司
主營產(chǎn)品: AB模塊PLC |
參考價(jià) | 面議 |
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更新時(shí)間:2018-05-28 20:53:40瀏覽次數(shù):283
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IC697ACC720-+-+-IC697ACC720
-+-+-
R端由0變?yōu)?時(shí),T4被復(fù)位并停止計(jì)時(shí)。復(fù)位后Q4.5變?yōu)?,當(dāng)前時(shí)間和計(jì)時(shí)預(yù)置值均清0。
定時(shí)器指令還有簡化形式。
延時(shí)通定時(shí)器指令簡化形式 :張亮(工程師) 專線: |
例:用S7-300控制指示燈HL1,當(dāng)控制按鈕SB1按下時(shí),HL1以2s熄滅、1s亮交替閃爍。設(shè)計(jì)相應(yīng)的PLC程序。
解:①分配控制系統(tǒng)編程元件:按鈕SB1—I0.0;指示燈HL1—Q4.0;延時(shí)通定時(shí)器T1—計(jì)時(shí)預(yù)置值為1s;延時(shí)通定時(shí)器T2—計(jì)時(shí)預(yù)置值為2s。
②采用延時(shí)通定時(shí)器簡化指令,其梯形圖和語句指令程序見圖。
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