4 TAG VU 58 TAG VU
3.3.1.1.QUI TAC LAP TRINH:
■L Hang ddu tien su" dung nhdp mdi ndi ngudn. 4o Hang cudi cung dung xdc djnh cdc dadng ndi. -i- Cdc hang chdn (tuf 2 den 12 ) Id cdc budc .
^ Cdc hang le (tuf 3 den 13) Id cdc di/dng chuyen tiep. 4 Mdi bi/dc difdc ddnh so tuf 0 den 127 .
-4 Co the co vdi gidn do dude bieu dien trong cung mot trang. ItflHls! £\ §1^1 1^1 a|Hi ^1^1 vI
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("End of proportioning")
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("Initial step")
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HINH 3.2 : Hinh dqng cua trang chinh cua gidn do GRAFCET trong chUohg trinh PL7- PRO.V3.
3.3.1.2. CHON LlM THUf TU VA CHAM DLTT THLf TU CHON LUA:
4 So budc chuyen theo hudng len hay xudng khi sd dung gidn do theo phUdng phdp OR hoi tu hay OR phdn ky khong vuat qua 11 budc.
-4 So thuf tu cdc budc chuyen co the lap theo hudng tU trdi sang phdi.
Trong hinh 5.3 ta cd mot thi du cho su chon lua thuf tu cdc budc trong lap trinh Grafcet.
Cjiao Tfilnh lEQl @Iut&*ig. 03 Trang: 26 ^ Mot each tong quat, mot chuoi thuf tu ede khdu lap trinh chon li/a phdi bao gom trqng thai chdm duft cho mot chudi ede khdu lap trinh.
■i- Cho phep xoa vdi trqng thai chuyen tufc thdi , ede dieu kien chuyen trqng thai lien ket phdi dude Iqai truf.
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5.3.1.3. TAG DONG VA DL/NG lAc DONG TLTC THdl CAP KHAU LAP TRINH:
4 So budc di xudng cua tdc dqng tufc thi (AND phdn ky) hay so bade di len cua su" dOfng tdc dong tuTc thi (AND hoi tu) khdng vUdc qua 11 khdu.
-■L Mot each tdng qudt, nhdng bade tdc dqng tufc thi phdi dadc ket thuc bdng ede khdu dufng tdc dqng tufc thi.
4- Cdc khdu tdc dqng tufc thi ludn luon bieu dien tuf trdi sang phdi. ^ Cdc khdu dufng tdc dqng tufc thi luon ludn bieu dien tuf phdi sang trdi.
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41 42 □ □ □ 43 □ □ □ 44 □ C c 45 □ C □ 46 □ □ □ 47 □ □ □ 48 □ a a 49 S -□ -□ -□ -□ -□ 50 □ □ □ 51 □ 52 □ n 53 □ c 54 S. 55 □ □ □ 56 □ □ □ u 57 n 58 ri HINH 3.4
3.3.1.4. SUf DUNG CAC MOI NOI (CONNECTOR): (adsbygoogle = window.adsbygoogle || []).push({});
Muc tieu cua cdc md'i nd'i de dam bdo si/ lien tuc cho gidn do GRAFCET khi lien ket tn/c tiep tren cung mot trang hay giila hai trang ke tiep nhau . Si/ lien tuc nay dude qui djnh bdng cdc md'i nd'i djnh trudc cd quan he den cdc md'i nd'i nguon.
-4 Gidn do cd the tqo trd Iqi thdnh vdng kin do si/ su1 dung cdc md'i nd'i (xel vdng kin tuf budc 18 den bade 0 trong hinh 5.5.
Cjitio Mtj-p, Tfiitdi fpjQfd jEO dim&ng, 03 Trang: 27 ■i- Mot chuoi ode khdu lap trinh co the di/dc bdt dau trd Iqi bdng each stf dung ede moi ndi (thi du bu'dc 10 den bade 1, hay bade 8 den budc 2..).
■i- Cdc md'i ndi du'dc sQ dung khi nhdnh gidn do ddi hdn trang (thi du tuf budc 9 den budc 10).
3.3.1.5. CAC LIEN KET VA CHAM Din CHUOI LAP TRINH CHO TRLfdC :
^ Vdi mot chudi lap trinh cho trudc, su chuyen vj tri vd xdc djnh cdc lien ket phdi dUdc ddt vdo trong cung mot trang chUdng trinh (Xem hinh 5.6 a).
4- Vdi mot ket thuc chudi cdc budc chUdng trinh chon trudc, cdc lien ket ngudn phdi dUdc ddt vdo cung trang nhu budc den (xem hinh 5.6a).
-■ Vdi mot ket thuc chudi cdc budc chon trudc , md theo sau cdc budc nay Id mot lien ket; phdi cd cung mot so cdc lien ket ngudn cung nhu cdc budc trudc khi ket thuc chudi cdc budc chUdhg trinh (xem hinh 5.6 b)
PL7 PRO : thu - [GRAFCET: MAST - Sequential CHART] ! ; ' File Edit Utilities View Tools PLC Debug Options Window ?
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10 Y_ 10 y 9 X 10 11 12 3 □ □ □ 4 □ □ □ 5 □ □ o 6 □ □ □ 7 18 13 14 15 1E 17 jj u ^ i i rr a. Ready HINH 3.5
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Cjifio Tfilnh Mqip. ^Ji'inh lEQl 03 Trang: 28 IfriPL? PRO : thu - [GRAFCET: MAST - Sequential - CHART] .-J.ffJxj
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J 25 43 □ □ □ 45 □ □ □ 48 30 T 35 1 37 50 30 X 30 35 X 35 37 X 37 43 X 50 HINH 5.6 a HINH 5.6 b u ITiJ
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3.3.1.6. CAC NO I TRaC TIER:
4- Cdc noi tri/c tiep lien ket mot bi/dc chUdng trinh den mot bade chuyen hay mot bUdc chuyen den bade chadng trinh. Cdc ndi nay cd the ve theo phaang ngang hay phaang thdng ddng.
^kr Cdc ndi trac tiep cd the:
□ Ve theo phaang ngang (vj tri 1 trong hinh 5.7) khi ndi khdc loai. □ Diem giao (vj tri 2 trong hinh 5.7) khi chung cung loai.
(jido Tfilnh Mq-ql jEO @Iut&*ig. 03 Trang: 29 ± Noi khong the bang ngang qua ode bifdc tdc dong tufc thdi hay ode budc ngOrng tdc dong tdc thdi.
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