D. ROLE THOI GIAN (TIMER)
7. La dong dieu ch1nh khe ha
4.2. Nguyen ly ho�t d(;ng
Loi thep h1nh chlf U, ben phai quan cu9n day (1), ben trai la ong dong ngan m?ch. Khi d- a di$n ap vao 2 dau cu9n day t9o nen tu' thong <I> trong m9ch sinh ra h/c tu' va nap (3) d- c;,c hut ch�t vao phan cam lam h$ thong tiep diem(6) d- c;,c dong 19i.
Khi cu9n day mat di$n, tu' thong <I> giam dan ve 0. Trang ong dong xuat hi$n dong di$n cam Cmg t9o nen tu' thong chong 19i slf giam cua tu' thong <I> ban dau. Ket qua la tu' thong t6ng trong m9-ch khong b! tri$t tieu ngay sau khi mat di$n.
Do tu' thong trong m9ch van con nen tiep diem van duy tr1 tr9ng thai dong them 1 khoang thdi gian nCra m6i mo ra.
Vft (5) dung dieu ch1nh d9 cang cua lo xo, la dong mong (7) dung dieu ch1nh khe ho giCra nap va phan cam. Hai b9 ph,fm nay deu co tac d[:1ng dieu ch1nh thdi gian tac d9ng cua Role.
❖ On-delay: Tri hoan thcsi gian dong m�ch (hinh 4-13).
H1nh 4.1 2. M9t so d,;mg On-delay cua hang ANL Y - 0ai Loan
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tinJdng Tilp ai.im Tiner
H1nh 4.1 3. Sd do dau day Timer On-delay hang ANL Y - 0ai Loan
Tom tiit nguyen ly lam vi�c cua Timer On-delay:
- Khi d�t vao cu9n day cua Timer On-delay (Board m9ch di$n ta. Chan 2 va Chan
7, h1nh 4.13) m9t di$n ap dlnh muc:
+ Cac tiep diem th- dng ( 1-3 va 1-4, h1nh 4.13) cua Timer thay d6i tr9ng thai tuc thdi (giong tiep diem cua role di$n tu'), 1-3 dong 19i va 1-4 mo ra.
+ Cac tiep diem Timer (8-5 va 8-6, h1nh 4.13) sau m9t khoang thdi gian (bang khoang thdi gian ch1nh d!nh ch9n tr- 6c, tfnh tu' luc cu9n day co di$n) m6i thay d6i tr9ng thai, 8-5 mo ra va 8-6 dong 19i.
Sau khi cac tiep diem Timer da chuyen tr9ng thai, h$ thong ho9t d9ng b1nh th- dng.
- Khi ta ng- ng cap di$n cho cu9n day Timer. Cac tiep diem l?P tCtc trd ve tr�mg thai ban dau (nh- h1nh 4.13).
Cach kiim tra Timer:
- Ch1nh Timer 1 Os.
- Cho di$n ap djnh mCtc vao 2 dau cu9n day, tren Timer c6 1 den LED sang: + Dung VOM do thong m9ch:
• Oo 2 chan 8-5 (keu) va 2 chan 8-6 (khong keu): Ch- a ket lu?n.
• Neu ng- gc 19i 8-5 (khong keu), 8-6 (keu) ho?c 8-5 (keu), 8-6 (keu) ho?C 8-5 (khong keu), 8-6 (khong keu): H- .
+ Sau 1 Os (tren Timer se c6 2 LED sang), dung thong m9ch do 19i, neu: • 8-5 (keu), 8-6 (khong keu): H- .
• 8-5 (khong keu), 8-6 (keu): Tot.
❖ Off-delay: Tr1 hoan thdi gian md m9ch (h1nh 4-15).
,:uu."I' . t ::f 1Jii1At .; .J. T i r•a r;,,- .tu; =��- ·•- -· .,,,._:: :!'r:i" � .• ;m ... u: .a:. . ......... �,. nip dldm lhu�n 9 nfp di6m 1mr.1 r Ngoon Hlnh 4.14. M9t so dc;ing Off-delay
cua hang ANLY- Dai loan Off-delay cua hang ANLY- Dai loan Hlnh 4.15. Sd do dau day Timer
T6m tat nguyen ly lam vi$c cua Timer Off-delay:
- Khi d?t vao cu9n day cua Timer On-delay (Board m9ch di$n tU'. Chan 2 va 7, h1nh 4.15) m9t di$n ap djnh mCtc:
+ Cac tiep diem th- dng (1-3 va 1-4, h1nh 4.15) cua Timer thay d6i tr9ng thai tCtc thdi (gi6ng tiep diem cua rdle di$n tu'), 1-3 dong 19i va 1-4 md ra.
+ Cac tiep diem Timer (8-5 va 8-6, h1nh 4.15) thay d6i tr9ng thai tCtc thdi, 8-5 mb ra va 8-6 d6ng 19i. Timer ho9t d9ng b1nh th- dng.
- Khi ta ng- ng cap di$n cho cu9n day Timer. Cac tiep diem th- dng (1-3 va 1-4) l?P tCtc trb ve tr9ng thai ban dau nh- ng cac tiep diem Timer van d tr9ng thai lam vi$c m9t khoang thdi gian bang chfnh thdi gian ch1nh djnh mdi trd ve tr9ng thai ban dau (nh- h1nh 4.15).
❖ Ky hi$u:
C uc;in d4y Ondelay C uc;in d4y Offdelay
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I A2 I A2
Tigp diefm Ondelay T igp d ief m Off delay
Mdl nhanh 06ng nhanh Mdl ch�m
Li�n dc}ng Li�n dc}ng
4.3. Tinh ch9n rdle thcsi gian:
Khi ch9n llfa role thoi gian ta can chu y cac diem sau: - 0i$n ap djnh mu'c: udm role = um(lng
- Dong di$n d!nh mCic: lam role > ltt
Ott la dong di$n cua m9-ch dieu khien. Hi$n nay tren thj tr- c)ng ta th- c)ng g;[ip I09-i role c6 dong di$n dinh mCic SA va 7 A, di$n ap 220v va 250V)
- Thoi gian tre (c6 cac I09-i 10s, 30s, 60s va 15; 30; 60 phut...) - Lo9-i role On-delay hay Off-delay.
Sau cung can cu' vao m1:1c dfch sll' di:Jng de ch9n I09-i role thfch hc;,p.
4.4. Hu' hong va cac nguyen nhan gay hu' hong:
Khi sll' d1:1ng ta thuong g� p die hu hong sau:
+ H- hong cac tiep diem th-ong va cac tiep diem thc)i gian do bi ngan m9-ch phfa sau role
+ Gae tiep diem thoi gian ho9-t d9ng khong dung (vf di:J Tiep diem thoi gian th- ong mo 8-6 khong dong sau thoi gian ta dieu ch1nh m;[ic du da d- a di$n ap dinh mCic vao hai dau cu9n day role ... ) do bj n6 dcrt day noi tu' Board m9-ch di$n ta den cac chan ra ho;[ic do h hong Board m9-ch di$n tll'.
4.5. Sua chu'a rdle thcsi gian:
0oi voi role thoi gian c6 cau t9-o phCic t9-p nen khi c6 cac tr-ong hc;,p h- hong ta ch1 c6 the sll'a chG'a d- c;,c tr- ong hc;,p bi dcrt day noi tu' Board m9-ch di$n tll' den cac dau chan role bang each han noi l�i.