I E840 E841 E842 E844 E1845 E846 E884 E886 E
Ho~t dqn g:
Giil su uUa tay diEu khitn sang tnii (tay di~u khi~n +K5 - 51) qua bQ mil hOil. tin hi¢u ::-; bit (binary coder) d~ch chuytn dugc dua vao CPU· S7 - 381 qua khoi EB4.
Sau khi xu ly CPU uua fa tin hi¢u dicu khi~n toi bQ bi~n tan cua ca cau di chuy~n chiln de.
Cong tic to' Kl co di~n dong cac tiep diem:
· Kll.2 clla m,!-ch dQng I,!C cap nguon cho bQ bien t~n.
· K15.3 m,!-ch dieu khien phanh di¢n cap cho 7 phanh di~n li:C +P - Yl Mn +P . Y7, gi3.i phong trl:\c dqng ca.
· Neu cac phanh khong colai thl cong tic to' K09 gui tin hi¢u den PLC xU: I)' M cho phep maphanh.
Dong thai khi keo tay dieu khi~n cam dicu khitn xoay lam mle trung gian K805.5 hO'!-t d9ng. Tiep diem KSO rna cat tin hi¢u tai ET200.
Tu)' theo u(l djch chuy~n cua tay dieu khie'n CPU se tiuh loan dieu khien bien tan t';tO fa tan so, di¢n ap wong u-ng vai toc di? d~t.
9.7.3. Cae bao viii
· Bao v¢ qua tdi:
+ Bao v¢ qua tai dt;>ng w truyen uQng chlnh :
D('Ing ca +P - Ml den +P - M7 bj qua tai role Fll • F17 laC dqng nha tiep diem thuang
dong Fll(2.J), F12(2.4), FJ3(3.1), F14(3.4), FlS(4.1), FI6(4.4), FI7(4.8) cat mach dien dong
l,!c Clla d6ng ca.
+ Bao v~ qua tai cho dc)ng ca di¢n phanh thuy ll.rc :
Neu dc)ng cd di¢n phanh thuy Jl!c cd cau quay mam bj qua tai thi rale nhi¢t F51 - F57 ,~e
tac d('lng cat aplomat FSl - }<'57 dAn den toan m';lch d(?ng Juc cua dQng co mal di¢n.
· Bao v¢ IIgall m{lch :
+ Bao v¢ b~ng cau chi co trong aptomat = O+EEI • }<'3: Khi ngan m,~ch xay ra toan bo ca cau di chuyen chan de mat di¢n.
+ Ne'u dqng co phanh thu)' l,!c bj ngan m,!-ch, rale bao ve qua dong trong aptomat hm.lt dQng cat bao v¢ m';tch dqng l,!c cua phanh.
· Bao v¢ qua I1hit/l:
~~d~~~dU~~~d~~~ad~oo_W~~c*
day qua muc d~t thi wle bao v~ co di¢n, tuy theo d¢ng cO nao b~ qua nhi¢t rna fok nhict F511 hay FS12 co di¢n nha tiep di~m rhuemg dong F511 hay F512 gui Mn PLC qua khoi ET 200. PLC xu ly va gui tin hi¢u cat di¢n cong tic w Kl lam loan bQ h¢ thong se bj cat nguon dong thai den d buong dieu khi~n se bao.
9.8. fllEU KHIEN N01 MANG PLC TRONG CAN TR~C TUKAN 9.8.'. Gioi Ihiliiu ehung
Cin trl:\c TIJKAN lil. m('lt trong nhfrng 10,!-1 d.n truc moi nhat cua CHLR Duc ap dl:\ng ky
thuM di~u khitn hi¢n Uf).i. D~ thl;Cc hi¢n di';:u khi~n, can truc su dlJng he th6ng PLC n6i mf).ng theo
chuin Profibus. Dicu nay cho phep tiet ki¢m duqc chi phi va nang cao kM nang dicu khien h¢ thong. d day m~ng Profibus dung d~ ket noi trung W.m dieu khi~n cua PLC vai cac tr~m dieu khi~n pMn tin, cac man hloh hi~n tht va cac bien tAn. D6 thL!c hi¢n nhilng phuang pMp dicu khi6n hi¢n dl,li can phai c6 nhUng thiet bi tuang Iffig. Sau day se giai thi¢u m(.lt so thiet b! st'r dl;lng trong h¢ dieu khi~n ci'la can trl;lc TUKAN.
* BI) ki~m 50at I*p trlnh
C6 nhi¢m Vl,l ki6m sOlit chlIang trlnh mQt cach tl! dQng thOng qua m~m hlnh hi~n thi TP2?
Bq ki€m soat l<).p trlnh dung d~ kitm smit toan bQ ca cau (ruyen dQng, cac b(.l bien (an, h¢ thong di¢n ap tha:p va bang dieu khien dn trl;lC. &! ki~m soat l<).p trlnh dlIqc noi tai bang di¢n d('lc l~p va ban di~u khi€n dn try.c qua tr~m trung gian ET200.
Cic tfj so co dinh doi Val ca cau truy~n dQng duqc hi€n th! bting bQ dieu khien ky thu~t
so. Tri s6 co djnh duqc giai h~n, phong toa ho~c truyen baa do bQ ki€m saM truac khi chung duqc chuyen m~ch vao cac co cau tuang .m.g qua dan vi dau ra tuang dong.
Kit:!:m smit (rung tam cung nhu thu th<).p cac 16i dan Ie va hien thi chung tren milO hlnh van bim trong cabin dieu khi~n.
Nhim M nang cao tfnh an toan ho,:!t d¢ng, cac 10i gay ra ng~t ml,lch cuang buc cac truyen dQng dUQc dua vao bQ ki~m soat PLC va duqc ch<;ly qua PLC, lam nhu the de dam bao dlIQc dng trang trub'ng hqp hOng PLC, cac thiet bi truyen d(lng sc dUng l~i .
.. Tr~m trung gian ET200 co nhi¢m vy. truy~n dii li¢u giiia CPU va m<;lch dicu khi€n clla cac co cau nha cac kh6i in - out.
• B.;l bien tan 68E70 la bQ bie"n tan gian tiep, tan s6 ra clla b¢ bie'n tan duqc dieu khi€n thay dOi bing cach dich tay dieu khi€n. Tu)' thea d¢ djch chuy~n cua tay dieu khi~n rna tin hi¢u tif CPU gui den M dieu khi~n bien tan dh!u che thea d¢ r¢ng xung PWM.
*Tay dieu khi~n cua dn truc TUKAN khtmg pMi la tay trang dan thuill d6ng rna bang cac tiep di~m ma tay dieu khien dung Encoder th6ng qua b() giai ma tit dQ dich chuy~n cua tay di~u khi€n sang tin hi¢u nhi pMn 8 bit phl!-c Vl,l cho di~u chinh toc d¢ ci'la ca cau luang tffig vai 256 cap toc dQ cho moi chieu chuyen d(.lng.
Truac day cac c6ng tac to -mle duqc dung lam phan tii dieu khien chinh trang m~ch clla cac co cau. Con vai can tn!c TUKAN phan tir dieu khi6n chinh trong m~ch III cac kh6i in - out. Khoi dau vao nh~n cac tin hi¢u vao sau khi qua bQ ph~n xu 19 tin hi¢u se dua ra khoi dau ra va ta duqc tin hi¢u dieu khi€n.
Vai cach thi€t ke nhu tren nen so d6 dieu khi~n, m,!ch d(.lng lI!c dan gian, g<m nh/,\ vi¢c dieu chinh laC dQ lang han nhieu so vm. dn tfl,lC dieu khi€n sir dl:mg cong tac ta - ralc. Do kh6ng su dung cac cong de to a m~ch d¢ng 11Jc rna dung b(.l bi€n tan nen traoh duqc nhilng phUc tap do tia lua di¢n gAy ra do dong rna cac ti€p diem.
9.8.2. Cau true eua mc;m9 di<!u khiiln eOn tr~e TUKAN
au truc ci'la m;:tng dieu khien dn trl!-C TUKAN duqc mioh hO<;l tren hlnh 9.23. Qic thanh phAn co ban clla h~ thong g6m :
+ CPU: Khoi di~u khi~n trung tAm c6 nhi¢m v\l thu th~p va xu 1)" thong tin ella toan h¢ thong qua Profibus.
+ TP27 : Man hlnh hi€n thi. C6 hai man hlnh hi€n thi dUQc d~t b hai vi trf, man hlnh tbtl nhat d~r q.i cabin di~u khi~n, man hloh tM hai dUQc di;lt t;:ti bu6ng di¢n. cac man hlnh nay duqc dung M kiem tra giam sat va xac nh~n loi.
+ ET200 : La cac tr;:tm trung gian, k€t hQ'p voi CPU va bien tAn M dieu khi€n ho;:tt dc>ng clla d.c co cau.
+ eRP (Communication Board Profibus) : Khoi giao di¢n thOng tin (khoi giao tiep) clla bien {'in dung de: ket noi bien litn v6i m;:tng Profibus.
Ho~t dc)ng chung cpa cac kh6j nhu sau :
Khoi dieu khi6n trung tam CPU dLCqc ket noi voi man hlnh hien thi TP27 va cac khoi PLC clla h¢ thong qua m;:tng Profibus.
De dieu khien ho;:tt d9ng clla cac co diu tin hi¢u dtn;1c dua tu bQ xu I)" trung tAm tai dau
va~ clla d.c tr;:tm philn tan cua PLC, tr~m ph:1n tan cua PLC thu nMn tin hi¢u va thl!C hi¢n di~u
khie:n ho;:tt dQng cua h¢ thong.
Ngoai ra dc dAu van clla dc tr;:tm philn tan con dLCQC ket noi vai h¢ thong bAo v¢ bang role de dam bao an toan cho v~n hanh clla he th6ng. Trang tnrang hQ'p xuy ra SlJ c6 dc rale nay tac dQng va truyen tin hi¢u den dAu va~ cua kh6i PLC. PLC thu nh~n thong tin va ra I¢nh dieu khien dimg ho~t dong eua co du.
Vi¢c xac bUo 16i clla h¢ th6ng dUQe hien thi tren man hlnh TP27 giup eho nguai dieu khien xac djnh nhanh va cbinh xac noi xiiy ra sl! co d€ thu~n ti¢n cho vi¢c sua chua, bao dLC6'ng va nhanh ch6ng dua co du van lam vi~c phl:lC V\l siin xua't. Co hai man hinh TP27 d~t t;:ti cabin di~u
khien (driver's cabin) va bu6ng dien di~u khien ehfnh (electric container).
Khi xiiy ra sl! co tin hi¢:u dUQc truyen ve CPU va bao loi tren TP27 d~t t<:Li cabin dieu khien. NguOi. dieu khien xae nh~n !oi va xem c6 the tiep tl:lC eho h~ thong h0i.lt dQng hay khong. Neu loi kh6ng nghiem trQng thl nguai dieu khien tae dQng vao nut An xac nh~n 16i ben tay phiii clla ban dieu khien de bO qua 16i do va tiep t\le dua h¢ thong vao lam vi¢:c.
s 2' , o <:~, ;:;@ ,,', ~ "! g: If,f.+ ~~B ,,'w"; -<: ~ ~ < " ::l ;t 9: B' .;l.",3:;:: "",,«,2
Hlnh 9.23 . Sdd6 ("(fll true nU;lIlg PLC ("[10 eei'll InlC
9.8.3. Cau true chung cua cae khoi trong mQ"9 Profibus cua can tr~c TUKAN