西門子6SN1123-1AB00-0HA1自動化設備

6SN1123-1AB00-0HA1

6SN1123-1AB00-0HA1

6SN1123-1AB00-0HA1

S7-200中SM0.0的用法：

1、SM0.0在程序運行時始終為ON。

2、SM0.0是一個無條件的常閉觸點，用來啟動無條件運行的指令。

只要上電，SM0.0必然是“1”。因此程序中那些不受任何條件限制，必須要執(zhí)行的指令就用它作為觸發(fā)觸點。

3、問：程序有時要在指令前加ＳＭ０.０，為什么不直接連在母線上，不是一樣嗎？

因為，S7-200的指令是不能直接連在“母線”上的，這不符合語法要求。

IC693PWR321 IC693PCM301RR IC693PWR321RR IC693MSC301RR IC693PCM301LT

IC693PWR321LT IC693PCM311

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3HAC022033-004 IMDSI13 INICI03-SCIH IISAC01 IMMFC04 DSDI130 DSQC238 DSQC344 YYE109A DSQC354

3HAC022033-005 IMDSI14 INICI03-SCIL NDIS01 NFAN01 DSDO130 DSQC239 YYT102C DSQC602

3HAC022033-007 IMDSI15 INIIL02-H NDLS02 NFAN02 DSDX110 DSQC241 DSQC345B YYT102D DSQC603

3HAC022034-001 IMDSO14 INIIL02-L NLBS01 NIAO01 DSDXB001 DSQC243 DSQC345C YYT102E DSQC652

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