Vit chng trnh x l tn hiu o rung ca my nghinlop

Vit chng trnh x l tn hiu o rung ca my nghin Lp: CNKT in-in T C K6

MC LC31CHNG 1: S LC V MY NGHIN CON LN KIU NG

31.1Cu to:

31.2Chc nng ca my nghin

41.3Cu to v thng s k thut ca mt s chi tit ca my nghin

41.3.1Motor chnh

51.3.2Bn nghin

51.3.3Con ln

51.3.4Thit b tch liu

71.3.5H thng thy lc nng h con ln

81.4Nguyn l hot ng ca my nghin con ln

92CHNG 2: RUNG NG.

92.1Bn cht ca rung ng.

92.2nh hng ca s rung ng.

103CHNG 3: GII THIU THIT B

103.1S tng quan.

103.2Tng quan v cc thit b

103.2.1PLC S7-200

103.2.1.1Gii thiu v PLC

123.2.1.2Gii thiu v PLC S7-200 CPU224 AC/DC/RELAY

143.2.2Gii thiu v module EM235.

163.2.2.1Cch ni dy

183.2.2.2Cch iu chnh cu hnh cho EM 235:

193.2.3Cm bin gia tc AS-022.

193.2.3.1nh ngha v nguyn l:

193.2.3.2Thng s:

203.2.4Thit b o rung (Vibrocontrol 1100)

213.2.4.1 Cch u ngun:

213.2.4.2Cch kt ni cm bin vi thit b o rung:

223.2.4.3Kt ni ng ra Analog:

224CHNG 4: THIT K H THNG.

224.1S khi.

234.2S u dy in.

244.3Nguyn l hot ng ca h thng o rung

245CHNG 5: CHNG TRNH X L TN HIU O RUNG BNG PLC S7-200

245.1nh ng vo ra:

255.2Chng trnh chnh:

265.3Cch thc xy dng chng trnh.

285.4Gii thch chng trnh:

T VN Cng ty xi mng Holcim Vit Nam l mt trong nhng cng ty c quy m thuc tm c quc t. Trong nh my xi mng Holcim Hn Chng l mt trong nhng nh my c cng ngh hin i c th p ng cc thit b, my mc phc v cho nghnh sn xut xi mng. Ti nh my xi mng Hn Chng, khu vc my nghin bt sng l mt khu vc v cng quan trng trong dy chuyn sn xut xi mng v cng l mt phn khng th thiu l my nghin bt sng. c im ca loi my nghin ny l s b rung ng mnh khi hot ng, v vy mt h thng gim st rung ng s c s dng cho loi my ny.

Gim st rung ng trong cng nghip l mt phng php o lng c dng xc nh, tin on v ngn nga h hng i vi my mc c thit b xoay. Thc hin gim st rung ca my mc s ci thin c tin cy ca my mc v dn n hiu qu my mc cao hn v gim thiu h hng v in hay c kh. Chng trnh gim st rung c dng khp ni trn th gii trong lnh vc cng nghip pht hin li trong my, ln k hoch sa cha my mc, v gi cho my mc chy ng chc nng, khng h hng trong thi gian lu nht.

Nm c tm quan trong ca vn nn chng em tin hnh nghin cu v h thng gim st rung ng cho my nghin thng qua nhng kin thc hc v s hng dn ca thy. Do thi gian nghin cu v lm n khng di v do kin thc ca chng em cn hn hp nn khng th trnh khi nhng thiu xt, chng em rt mong thy thng cm. Chng em rt mong nhn c nhng kin ng gp ca thy v cc bn.

Chng em xin chn thnh cm n! 1 CHNG 1: S LC V MY NGHIN CON LN KIU NG

1.1 Cu to:

My nghin ti nh my xi mng Hn Chng gm c 3 phn chnh: B phn truyn ng Motor chnh Motor ph Hp s truyn ng B phn nghin Con ln

Bn nghin

Vng chn liu (damring)

Cnh dn hng gi (nozzle ring)

Co liu (scraper)

B phn tch liu

Lng ng separator

Lng tnh separator

Cht hi liu v t separator

M t truynng separator

Ngoi ra cn mt s h thng

H thng phun nc

H thng thu lc nng h con ln

H thng bi trn.

1.2 Chc nng ca my nghin

Trong nghnh sn xut xi mng, to ra xi mng phi tri qua nhiu giai on khc nhau. Nh khai thc nguyn liu, nghin bt sng, nung clinker, trong cc giai on th nung clinker l giai on quan trong nht. Ngoi ra nghin bt sng cng khng km phn quan trng, n nh hng n cht lng ca vic nung clinker, v mn v thnh phn ho l yu t quan trng quyt nh cht lng nung clinker. Cho nn la chn cng ngh nghin phi lin quan cc yu t sau.

Yu cu v mn

c tnh ca vt liu

Cng ngh nghin

Gi tr u t

My nghin con ln kiu ng p ng c nhng yu cu trn, v vyc a vo dy chuyn sn xut ti nh my xi mng Hn Chng, ng thi c cc u im so vi my nghin bi nh sau:

Tiu tn nng lng t hn

Hiu sut nghin cao

mn tng i cao

Cng sut nghin cao Chc nng chnh ca my nghin xi mng ti nh my xi mng Hn Chng:

Nghin liu

Sy liu

Tch liu

Vn chuyn liu

1.3 Cu to v thng s k thut ca mt s chi tit ca my nghin1.3.1 Motor chnh

Loi motor: 3 pha roto dy qun

Cng sut t a: 2850 Kw

Vn tc quay: 980 rpm

Khi ng cng vi in tr nc.1.3.2 Bn nghin

Bn nghin gm 12 tm thp c ghp li vi nhau to thnh mt khi, trong qu trnh hot ng bn nghin c th b mn, khi b mn th ta hn gia c li. bn nghin mn nhiu nht v tr ng nghin (ch m con ln, bn nghin v liu tip xc vi nhau). Thng s k thut ca bn nghinBN NGHINTHNG S

ng knh bn nghin4.6 m

ng knh ng nghin3.95 m

Tc bn nghin25.68 rpm

Khi lng9 tn

Vt liuNi - hard 4

Khi lng mi mn ng nghin2.1 g/t

Khi lng mi mn bn nghin5.3 g/t

1.3.3 Con ln

L 1 khi hnh cone gm nhiu chi tit ghp li vi nhau. Mi my nghin gm c 4 con ln t i din nhau.

Cu to gm: bnh, bc n, trc C kh nng chng mi mn tt, ta nng h con ln bng h thng thu lc. Thng s k thut ca con lnCON LNTHNG S

S con ln04

Vt liucromodur

ng knh con ln02 m

Khi lng con ln18.7 tn

Tui th con ln7000 gi

mi mn phn ng nghin3.4 g/t

mi mn tng cng ca con ln8.5 g/t

1.3.4 Thit b tch liu

Lng ng (roto) gm 120 cnh hn thnh lng hnh tr, lng ng chuyn ng bng m t 3 pha, vn tc quay gii hn t 0 98 vng/ pht.

Lng tnh gm c 40 cnh l nhng cnh hn c nh vi thn my nghin, v c th thay i gc trong khi cn chnh cc cnh nysau hn c nh (t 18 20o).

Cht hi liu v t separator v tm bn nghin, c dng hnh conev c bao ph bn ngoi bng mt lp btng chng mi mn.

1.3.5 H thng thy lc nng h con ln

Chc nng ca h thng thy lc:

H thng thy lc dng h tr lc nghin trong qu trnh nghin vi.

Gi con ln mt v tr trong sut qu trnh nghin.

Dng nng v h con ln.

Thay i lc nghin khi hot ng.

Thay i p i trong mch.

Gim chn ng v rung my nghin.

Hn ch h hng thit b.

Tng hiu qu lm vic my nghin

Nguyn l lm vic:

H thng thu lc nng c nguyn l hot ng ch yu ph thuc vo cc van dn hng, van iu khin lu lng, van mt chiu. B sinh cng chnh cho ton mch l bm thu lc c truyn ng nh mt in 3 pha, sau khi mt truyn ng cho bm hot ng th du thu lc t bn vo cng ht ca bm ri nn du li( bng cch thay i th tch du) ri x bng cng x bm ra cung cp du cho ton mch thu lc hot ng, thng qua cc van ta s iu khin hng ca du. Tu theo mc ch s dng m ta ng m cc van hp l cho my nghin hot ng hiu qu khi vn hnh cng nh bo dng sa cha.

H thng thy lc ca con ln c chia lm hai nhnh khc nhau, mi nhnh tng ng vi hai con ln. H thng khng bm du thu lc bm lin tc, khi p lm vic khng th bm hot ng m bo p sut phi t yu cu.

t bit l h thng ny cn lp t cc bnh nit gim chn(b p) cho con ln khi lp liu cao1.4 Nguyn l hot ng ca my nghin con ln My nghin ng Loesche s dng p lc t con ln, liu cp vo tm bn nghin, khi xy ra s ch st gia con ln v bn nghin gim kch thc liu. dy lp liu ph thuc lng liu cp vo v chiu cao ca Damring. Qu trnh nghin xy ra s c liu tun hon trong v tun hon ngoi.

2 CHNG 2: RUNG NG.2.1 Bn cht ca rung ng.

rung ca mt i tng l mt trng thi chuyn ng qua li ca i tng quanh mt v tr cn bng. Trong cng nghip quan tm n rung kim tra tnh n nh my.

Gim st rung l mt phn quan trng trong k thut gim st tnh trng thit b rung ng mang tnh dy chuyn. Ta c th ni rng s rung ng ny chnh l nguyn nhn dn n s rung ng khc. Chnh v vy vic pht hin v ngn nga rung ng l mt cng vic ht sc quan trng v c ngha v cng to ln trong cng tc chun on v phng nga h hng.

Thng thng rung ng ca mt chi tit, mt b phn c kh mang tnh ly tin. Do vy vic gim st, theo di s tin trin ca rung ng l hon ton c th nu nh chng ta c thit b v thc hin ng phng php.

p dng k thut gim st rung ng s gip cho ta xc nh mt cch kh chnh xc thi im xy ra h hng, hay ni mt cch khc l thi im m chi tit hoc thit b mt kh nng lm vic. t chng ta s trnh c cc h hng ngu nhin, cc h hng ngoi mun. V thng thng cc h hng loi ny s phi tr mt chi ph rt ln, nht l i vi cc chi tit, cc cm my quan trng i vi sn sut.

Ngoi ra, k thut gim st rung ng s gip ko di tui th ca thit b nh : trc, roto, ... v cc chi tit c chuyn ng quay khc.2.2 nh hng ca s rung ng.nh hng ca s rung ng thng nghim trng. N cn phi loi b trong lc my vn hnh, trong qu trnh truyn ng t ng. Trong mt vi trng hp tn s v mc ca s rung ng c th lm thit hi bn trog vt th. My mc c th b thit hi bi s rung ng. Nu s rung ng xy ra khi c s cng hng tn s th n c th lm nt hoc gy mt vi phn nh l ai c, bulong. Ting n chnh l kt qu t s rung ng, thng vn ny rt nghim trng v c th nguy him n ngi chi tc dng t n trong chu k di. i vi con ngi, nu b chn ng nh vy trong mt thi gian di s c th b m mt, mt cn bng, tai v lm vic km hiu qu. V s rt nghim trng nu iu ny xy ra i vi ngi vn hnh my, ti x, phi cng. S rung ng khng c cch ly th n truyn qua bt k vt rn no tip xc vi n nh l sn nh, tng, ng, ng dn in, v bt k c cu thanh c trong my. y c l l nguyn nhn bt k vt no tip xc vi n u gy ra rung ng. N c th l nguyn nhn nghim trng gy ra thit hi n trc trong vng ln cn, v vy n rt l quan trng nn chng ta phi o v kim tra s rung ng.3 CHNG 3: GII THIU THIT B3.1 S tng quan.

MY NGHINCM BIN GIA TC B O RUNG

N BOPLC S7-200 MODULE EM235MT S THIT B C DNG: PLC S7-200

MODULE EM235

Cm bin gia tc AS-022

B o rung ( vibrocontrol 1100)

n bo.3.2 Tng quan v cc thit b

3.2.1 PLC S7-2003.2.1.1 Gii thiu v PLC

PLC ( Programmable Logic Controller ): B iu khin lp trnh, PLC c xp vo trong h my tnh, c s dng trong cc ng dng cng nghip v thng mi.

PLC t bit s dng trong cc ng dng hot ng logic iu khin chui s kin

PLC c y chc nng v tnh ton nh vi x l. Ngoi ra, PLC c tch hp thm mt s hm chuyn dng nh b iu khin PID, dch chuyn khi d liu, khi truyn thng,

PLC c nhng u im: C kch thc nh, c thit k v tng bn chu c rung ng, nhit, m v ting n, ng tin cy.

R tin i vi cc ng dng iu khin cho h thng phc tp.

D dng v nhanh chng thay i cu trc ca mch iu khin.

PLC c cc chc nng kim tra li, chn on li.

C th nhn i cc ng dng nhanh v t tn km.

Cu trc bn trong ca PLC

Mt h thng lp trnh c bn phi gm c 2 phn: Khi x l trung tm (CPU: Central Processing Unit) v h thng giao tip vo/ra ( I/O)3.2.1.2 Gii thiu v PLC S7-200 CPU224 AC/DC/RELAY

Vi ti ny em s dng PLC S7-200 CPU224 AC/DC/RELAY

Thng tin: Ngun cp: 85-264VAC. 47-63Hz

Kch tht: 120.5mm x 80mm x 62mm

Dung lng b nh chng trnh: 4096 words

Dung lng b nh d liu: 2560 words

B nh loi EEFROM

C 14 cng vo, 10 cng ra.

C th thm vo 14 module m rng k c module Analog.

Tc x l mt lnh logic Boolean 0.37s

C 256 timer , 256 counter, cc hm s hc trn s nguyn v s thc.

C 6 b m tc cao, tn s m 20 KHz

C 2 b iu chnh tng t.

Cc ngt: phn cng, theo thi gian, truyn thng,

ng h thi gian thc.

Chng trnh c bo v bng Password.

Ton b dung lng nh khng b mt d liu 190 gi khi PLC b mt in.

Xut s: Siemens Germany CPU c cp ngun 220VAC.Tch hp 14 ng vo s (mc 1 l 24Vdc, mc 0 l 0Vdc). 10 ng ra dng relay.

M t cc n bo trn S7-200: SF (n ): n SF bo hiu khi PLC c hng hc.

RUN (n xanh): n xanh sng bo hiu PLC ang ch lm vic v thc hin chng trnh np trong my.

STOP (n vng): n vng sng bo hiu PLC ang ch dng, khng thc hin chng trnh hin c.

Ix.x (n xanh)ch trng thi logic tc thi ca cng Ix.x. n sng tng ng mc logic l 1.

Qx.x (n xanh): ch trng thi logic tc thi ca cng Qx.x. n sng tng ng mc logic l 1.Cch u ni ng vo ra PLC:

Cch u ni S7-200 v cc module m rng:S7-200 v module vo/ra m rng c ni vi nhau bng dy ni. Hai u dy ni c bo v bn trong PLC v module.Chng ta c th kt ni PLC v module st nhau bo v hon ton dy ni. CPU224 cho php m rng ti a 7 module.

3.2.2 Gii thiu v module EM235.

Vi ti ny chng em s dung module EM 235.

Mt s thng s ca module EM235:

SIMANTIC S7-200, ANALOG I/O

EM 235, FOR S7-22X CPU ONLY

4AI , 1AQ , 12 BIT CONVERTER

Xut s: Manufacturer: Siemens / GermanyEM 235 l mt module tng t gm c 4AI v 1AO 12 bit ( c tch hp cc b chuyn i A/D v D/A 12 bit bn trong).

Cc thnh phn ca module analog EM 235:

3.2.2.1 Cch ni dy

u vo tng t: vi thit b o u ra kiu in p :

vi thit b o tn hiu u ra dng in :

u ra tng t :

Cp ngun cho module :

Tng qut cch ni dy :

3.2.2.2 Cch iu chnh cu hnh cho EM 235:

Trnh t thit lp v cn chnh cho module Analog:

hy tt ngun cung cp cho module

gt switch chn di o u vo

bt ngun cho CPU v module. module n nh trong vng 15 pht.

S dng cc b truyn, ngun p, hoc ngun dng, cp gi tr 0 n mt trong nhng u vo. c gi tr nhn c trong CPU

Cn c vo gi tr hy chnh OFFSET a gi tr v 0 ( cn chnh im 0), hoc gi tr s cn thit k

Sau ni mt trong nhng u vo vi gi tr ln nht ca di o

c gi tr nhn c trong CPU

Cn c vo gi tr hy chnh GAIN c c gi tr l 32000, hoc gi tr s cn thit k

Lp li cc bc chnh OFFSET v GAIN nu cn thit.

Ch :

Phi chc chn ngun cung cp cho cm bin phi c loi b nhiu v phi n nh.

Dy dn tn hiu phi c lp bo v chng nhiu.

Cc u vo Analog khng s dng phi c ni ngn mch ( v d A+ ni vi A- )

vi yu cu ca ti, ta s cu hnh cho module EM 235 nh sau:

s dng tnh hiu input 0 20 mA , phn gii 5A

3.2.3 Cm bin gia tc AS-022.3.2.3.1 nh ngha v nguyn l:Cm bin c nh ngha nh mt thit b dng bin i cc i lng vt l v cc i lng khng in cn o thnh cc i lng c th o c ( nh dng in, in th, in dung, tr khng). N l thnh phn quan trng nht trong mt thit b o hay mt h thng iu khin t ng.

Nguyn l lm vic chung ca cc loi cm bin gia tc l da trn c s bin dng n hi ca cc phn t nhy cm vi s rung ng. S bin dng n hi s lm di chuyn mt b phn c hc t dn n s thay i ca in tr, in dung hay in p.

Vi ti ny ta s dng cm bin gia tc AS-022 o rung ca thn my nghin.

Cm bin gia tc AS-022.3.2.3.2 Thng s: Di o rung : 0 ~ 50mm/s nhy : 100 mV/g 5 %

10.2 mV/m/s2 5 % nh hng ca nhit n nhy : - 22 C ( - 7.6 F) - 3 %

+ 22 C ( 71.6 F) 0 %

+ 65 C (149 F) + 2,5 %

+ 120 C (248 F) + 5,5 % Nhit hot ng :

- 50 C (-58 F) ... + 125 C (257 F) Di tn s :

4 ... 10 000 Hz ( 0,5 dB)

1,5 ... 15 000 Hz ( 3 dB) in p hot ng :

-24 V (-18 V...-30 V) Cp kt ni :

cp PVDE, di 5.3m. Thn v thp khng g

Mu sc dy tn hiu :

-UB

red

Signal

yellow

0 V

white

Shield

yellow/black Xut x : B&K Germany.3.2.4 Thit b o rung (Vibrocontrol 1100)

VIBROCONTROL 1100 l mt thit b dng o lng v gim st cc rung ng ca cc thit b v my mc.

Vibrocontrol 1100

Thng s v chc nng ca vibrocontrol 1100 : S knh o rung : 2 Kt ni cm bin : cm bin gia tc, v d: AS-022, AS-062, ASA-022....

cm bin vn tc, v d: VS-068, VS-069, VS-0168, VS0169... Ngun cm bin : -24 VDC (max 30 mA) hoc 4 mACm bin tc : khng s dng in p.

Di tn s hot ng :

1 Hz ~ 10 kHZ Ng ra Analog : c th s dng tn hiu dng 0/4...20 mA hoc tn hiu p

0...10 V.

in p hot ng :

230/115 VAC, 50/60 Hz

iu kin mi trng : nhit hot ng:

0C+50C

Khong nhit lu tr: -20C...+70C3.2.4.1 Cch u ngun:

3.2.4.2 Cch kt ni cm bin vi thit b o rung:

S kt ni cm bin gia tc v cm bin vn tc

rt = , ws = trng, sw = en, ge = vng, br = nu, ge/sw = vng/en.

3.2.4.3 Kt ni ng ra Analog:

C th s dng tn hiu dng 0/4...20 mA hoc tn hiu p 0...10V ng ra Analog. C hai ng ra Analog l c lp v c chc nng nh nhau. Chc nng chng c ph thuc vo cch chng c cu hnh.V d : cu hnh ng ra Analog 1 l tn hiu 4...20mA, s dng ng vo l knh B, nh vy cc thng s thit lp cho knh B l: Thng s o

J04:v (vn tc rung)

n v

J06:mm / s (hoc ips) s

Pht hin tn hiu

J08:rms

Thng s o ln nhtJ10:50.0Vi cch thit lp ny c ngha l khi tn hiu u ra l 4mA th s tng ng vi mc rung l 0mm/s, khi tn hiu u ra l 20mA th tng ng vi mc rung cao nht l 50mm/s4 CHNG 4: THIT K H THNG.4.1 S khi.

4.2 S u dy in.

4.3 Nguyn l hot ng ca h thng o rung

Khi my nghin hot ng s to ra s rung ng, da vo s rung ng m ta c th kim tra c tnh trng hot ng ca my nghin.

o c rung ng ca my nghin ta s dng mt cm bin o rung ( cm bin gia tc), cm bin ny c gn c nh trn thn ca my nghin, v vy khi my nghin hot ng, thn my nghin v cm bin s cng rung ng vi cng nh nhau.

Khi cm bin rung ng s tr v mt tn hiu tn s, tn hiu ny s lin tc thay i theo cng rung. B o rung Vibrocontrol hay cn gi l transmitter s nhn tn hiu tn s tr v t cm bin v chuyn i tn hiu ny sang tn hiu dng in 4...20mA.

Tn hiu dng 4...20 mA t b o rung l tn hiu tng t (Analog), PLC S7-200 khng c kh nng x l tn hiu Analog, v vy ta s dng thm mt module EM 235 nhn tn hiu ny v gii m sang tn hiu s ( Digital) sau a vo PLC S7-200. Nhim v ca PLC l x l tn hiu ny v a ra cc mc cnh bo cho ngi vn hnh.Cc mc cnh bo v hot ng ca my nghin c chia thnh 4 mc:

Mc thp : L

Mc cc thp : LL

Mc cao : H

Mc cc cao : HH

Tng ng vi 4 mc cnh bo l 4 n cnh bo cho ngi vn hnh bit, t ngi vn hnh s gii quyt theo tng trng c th.5 CHNG 5: CHNG TRNH X L TN HIU O RUNG BNG PLC S7-2005.1 nh ng vo ra:a chChc nng

AIW0u vo Analog

Q0.0n bo mc cc thp

Q0.1n bo mc thp

Q0.2n bo mc cao

Q0.3n bo mc cc cao

5.2 Chng trnh chnh:

5.3 Cch thc xy dng chng trnh.Ta chn cc chn switch ca EM235 ch fulscale 0-20 mA. Nh vy gi tr s nguyn tng ng vi 0-20 mA s l 0-32000. Cm bin o rung c di o v thang gi tr l 0-50mm/s tng ng vi 4-20mA. Nh vy lm php tnh tam sut chng ta s c 0-50mm/s s tng ng vi 6400 32000. Vi thang gi tr trn ta s tnh c thng s rung hin ti tng ng vi gi tr s nguyn c vo AIW0. hiu c cch xy dng cng thc tnh ton, ta s v th nh sau:

Vi th ny, trc tung Y biu th cho gi tr t 0-32000 ca EM235, trc honh X biu th cho rung 0-50mm/s.

Gi tr 0-20mA a vo EM235 s tng ng vi gi tr 0-32000 m module c th gii m. Nhng y, tn hiu u vo ta s dng l 4-20mA tng ng vi gi tr s nguyn 6400-32000.0--------->20mA 4-------->20mA0--------->32000 x-------->32000Ta c

Nh vy :

4mA--------------6400------------0mm/s

20mA------------32000-----------50mm/s

V d ta c hai im A,B. Ta im A(0;6400) v ta im B(50;32000). K ng thng i qua hai im A,B, phng trnh ng thng i qua hai im c dng Y=AX+B (1). Ta ln lt thay hai im A,B vo phng trnh.

Thay A(0;6400) vo phng trnh (1): 6400 = A.0 + B => B = 6400.

Thay B(50;32000) vo phng trnh (1): 32000 = A.50 + 6400 =>

Ta thay gi tr hai im A,B va tm c vo phng trnh:

Gi tr cui cng ta cn tm l X tc l gi tr o rung, v vy ta c:

*Bin Y c gi tr t 6400-32000 tng ng vi tn hiu u vo 4-20mA, bin X chnh l gi tr o rung cn tm (0-50mm/s) , nhp phng trnh * vo chng trnh PLC ta s bit c gi tr X, gi tr ny s thay i theo Y, ta s dng gi tr X ny nhn bit c mc rung ng ca my nghin t a ra cc mc cnh bo cho ngi vn hnh bit.5.4 Gii thch chng trnh:

AIW0 l u vo Analog c gi tr t 6400-32000 tng ng vi 4-20mA, u tin gi tr AIW0 s c chuyn sang kiu d liu double integer (DI) v a vo vng nh VD0, tip theo chuyn vng nh VD0 sang kiu s thc (R) v a vo vng nh VD10 ( hu ht x l cc tn hiu Analog th cc gi tr s nguyn phi c chuyn sang kiu s thc tnh ton mt cch chnh xc, nu khng sai s s ln). Sau khi chuyn sang kiu s thc, ta ly vng nh VD10 tr cho 6400, chuyn gi tr va tnh c sang vng nh VD20, cui cng ta ly vng nh VD20 chia cho 512 c gi tr cui cng chuyn vo vng nh VD45, vng nh ny chnh l bin X phng trnh * khi ny. Ta s dng vng nh VD45 nhn bit mc rung v a ra cc mc cnh bo.

my nghin s c 4 mc cnh bo:

Mc cc thp :LL( 0mm/s VD45 4mm/s ) Mc thp:L( 4mm/s < VD45 8mm/s )

Mc cao:H( 8mm/s < VD45 12mm/s )

Mc cc cao:HH( 12mm/s < VD45 )

Khi 0mm/s VD45 4mm/s : xut ng ra Q0.0 ln mc 1 cho n bo LL sngKhi 4mm/s < VD45 8mm/s : xut ng ra Q0.1 ln mc 1 cho n bo L sng

Khi 8mm/s < VD45 12mm/s : xut ng ra Q0.2 ln mc 1 cho n bo H sng

Khi 12mm/s < VD45 : xut ng ra Q0.3 ln mc 1 cho n bo HH sng

B phn truyn ng

B phn tch liu

B phn nghin

ng liu ra

Phu hi liu

Cng cp liu

Co liu

Ca gi

Vng chn liu

ng phun nc

V my nghin

Hp iu chnh tc

Xylanh thy lc

Bn nghin

L vo kh nng

Tm lt

Trc con ln

Vnh ai bnh rng

Cn trung tm

Cnh dn hng

Bung phn ly

Trc dn ng

LNG NG SEPARATOR

LNG TNH SEPARATOR

PHU HI LIU

Con ln

ng nghin

Pittong thy lc

Bnh ni t

Trc con ln

Co liu

Vng tun hon trong

Vng tun hon ngoi

ON

OFF

6

5

1

2

3

4

MY NGHIN

CM BIN

VIBROCONTROL

EM 235

PLC 27-200

N BO

Y

X (mm/s)

050

32000

6400

A

B

Y=AX+B

GVHD: Nguyn Anh Dng

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