可編程控制器西門子S7-300/400PLC實踐與應(yīng)用整理ppt序號指令分類LAD說明1位邏輯命令—||—常開觸點(地址)2—|/|—常閉觸點(地址)3—|NOT|—信號流反向4—()結(jié)果輸出/賦值5—(#)—中間輸出6—(R)復(fù)位7—(S)置位8RS復(fù)位置位觸發(fā)器9SR置位復(fù)位觸發(fā)器10—(N)—RLO下降沿檢測11—(P)—RLO上升沿檢測12—(SAVE)—將RLO存入BR存儲器13NEG地址下降沿檢測14POS地址上升沿檢測常開和常閉觸點，傳感器和符號輸入端

的信號

狀態(tài)檢查信號狀態(tài)“1”符號/指令檢查

結(jié)果檢查信號狀態(tài)“0”符號/指令檢查

結(jié)果有輸入端

有電壓嗎?無有無101Yes1LAD:

常開觸點0&FBD:AIx.ySTL:ANIx.ySTL:&FBD:LAD:常閉觸點

No0

Yes1

No0

No0

Yes1

Yes1

No0過程PLC程序中的解釋動作不動作傳感器

是...動作不動作常開

觸點傳感器

是...常閉

觸點

L1(Q4.0)S1(I0.0)S2(I0.1)

L2(Q4.1)電路圖基本邏輯指令：與,或I0.2I0.3>=1=Q4.2O I0.2O I0.3= Q4.2I0.0I0.1Q4.0Q4.1LAD=Q4.0&I0.0I0.1=Q4.1FBDA I0.0A I0.1= Q4.0= Q4.1STLI0.2I0.3Q4.2L3(Q4.2)S3(I0.2)S4(I0.3)ORAND基本邏輯指令：異或(XOR)X I0.4X I0.5= Q4.0I0.4I0.5XOR=Q4.0I0.4I0.5I0.4I0.5Q4.0LAD

>=1=Q4.0&I0.4I0.5&I0.4I0.5FBDSTLA I0.4AN I0.5OAN I0.4A I0.5= Q4.0賦值，置位，復(fù)位(S)Q4.1I1.2I1.3I1.2&SQ4.1I1.3AI1.2

AI1.3

SQ4.1置位(R)Q4.1I1.4I1.4>=1RQ4.1I1.5OI1.4

OI1.5

RQ4.1復(fù)位I1.5()Q4.0I1.0I1.1I1.0&=Q4.0I1.1AI1.0

AI1.1

=Q4.0賦值LADFBDSTL觸發(fā)器的置位/復(fù)位SRRQSI1.2I1.3M0.0=Q5.3復(fù)位

優(yōu)先SRSQRI1.2I1.3M0.0Q5.3AI1.2

SM0.0

AI1.3

RM0.0

AM0.0

=Q5.3RSSQRI1.3I1.2M0.0=Q5.3置位

優(yōu)先RSRQSI1.3I1.2M0.0Q5.3AI1.3

RM0.0

AI1.2

SM0.0

AM0.0

=Q5.3LADFBDSTL連接器LADI1.0I1.1()M0.0I2.0I2.1()M1.1NOT()Q4.0A I 1.0A I 1.1= M 0.0A M 0.0A I 2.0A I 2.1NOT= M 1.1A M 1.1= Q 4.0STLI1.0I1.1&&I2.0I2.1M0.0M1.1Q4.0=FBD主控繼電器功能MCR<&A0.0MCRAS&A0.4Q8.0MCR>&=M5.5M69.0I2.7MCRD&=A0.7Q4.5M0.6=FBDMCRA //激活A(yù)I0.0 //允許

MCRMCR( //打開

MCRAI0.7 //NO觸點=Q4.5 //輸出線圈=M0.6 //輸出線圈AI0.4 //NO觸點SQ8.0 //置位輸出

)MCR //關(guān)閉

MCRANM5.5 //緊急觸點ANI2.7 //緊急觸點=M69.0 //輸出線圈MCRD //取消STLLAD(MCRA)I0.7(

)Q4.5(

)M0.6I0.4(S

)Q8.0(

)M69.0

I2.7M5.5(MCR<)(MCRD)(MCR>)I0.0無條件跳轉(zhuǎn)(不依賴于

RLO)(JMP)NEW1Network1Network2::::NetworkxNEW1(

)M69.0I2.7M5.5LADNEW1JMP....NEW1&M5.5I2.7=M69.0Network1Network2::::NetworkxFBDNetwork1

JUNEW1Network2::::NetworkxNEW1: ANM5.5 ANI2.7 =M69.0STL條件跳轉(zhuǎn)(依賴于

RLO)AI0.0AI0.1JCNEW1NEW1I0.0I0.1&I0.0I0.1JMPNEW1(JMP)如果RLO=1

就跳轉(zhuǎn)AI0.2AI0.3JCNNEW2JMPNI0.2I0.3NEW2NEW2I0.2I0.3如果RLO=0

就跳轉(zhuǎn)(JMPN)&LADFBDSTLRLO-邊沿檢測PI1.0I1.1M1.0M8.0NI1.0I1.1M1.1M8.1LADI1.0I1.1P=&M1.0M8.0I1.0I1.1N=&M1.1M8.1FBD

A I1.0 A I1.1 FP M1.0 = M8.0

A I1.0

A I1.1

FN M1.1

= M8.1

STLI1.0I1.1RLOM1.0M8.0M8.1M1.1OB1-循環(huán)例如信號-邊沿檢測I1.1=M8.0POSM_BITM1.0&I1.0I1.1=M8.1NEGM_BITM1.1&I1.0FBD

A I1.0 A ( A I1.1 FP M1.0 )