Luan Van Tot Nghiep

n tt nghip GVHD: TS.L QUANG C

TRNG I HC GIAO THNG VN TI TP. H CH MINHKHOA IN IN T VIN THNGB MN T NG HA-----o0o-----

LUN VN TT NGHIP

TI:IU KHIN BM N NH MCDNG PLC V BIN TN

GVHD:SVTH:TS. L QUANG CV TRUNG CANNG XUN HU08510500050851050025

TP. H CH MINH 09/2012

NHIM V N TT NGHIP

BN NHN XT N TT NGHIPBN NHN XT N TT NGHIP

LI CM N t c thnh qu ngy hm nay, chng em xin chn thnh cm n su sc n ton th thy (c) khoa in in t vin thng ,c bit l cc thy (c) b mn T ng Ha ca Trng i Hc Giao Thng Vn Ti Thnh Ph H Ch Minh tn tnh ch dy chng em trong sut qu trnh hc tp ti trng . l nhng kin thc qu bu lm nn tng cho chng em hon thnh lun vn ny ng thi l nn mng vng chc sau ny chng em tip tc hc tp v lao ng ngoi x hi .Xin chn thnh cm n thy L Quang c l ngi hng dn chnh cng l ngi tn tnh ch bo, gp v nh hng cho chng em trong sut thi gian lm lun vn.Xin chn thnh cm n c on Dim Vng gp v to iu kin thun li cho chng em hon thnh lun vn ny.Xin gi li cm n n tt c bn b, ngi thn ng vin, ng h chng em trong thi gian lm lun vn.Cui cng v kinh nghim v kin thc cn hn ch, kh nng tip thu vn cn gii hn nn khng th trch c nhng sai st, chng em mong nhn c s quan tm gip ca cc thy (c) lun vn ny c y v hon thin hn. Chng em xin chn thnh cm n! Ngi vit ng xun Hu V Trung Can TM TT

Trong lun vn ny chng em vn dng cc kin thc c bn c hc ti trng ng dng vo vic xy dng cc h thng ngoi thc t, nhm chn bi ton n nh mc nc trong bn cha cng nghip qua va cng c kin thc va tm hiu, thit k v thi cng h thng vi nhng mc tiu sau: Tng kt v phn tch cc ng dng v gii php thc t vn iu khin mc nc ca bn cha trong cng nghip. Gii php tit kim nng lng. Tm hiu giao thc USS xy dng truyn thng gia PLC S7-200 v bin tn qua c th ci t, gim st hot ng ca h thng. Tnh ton, la chn cc thit b ng lc v iu khin Tm hiu bin tn MM420 ca Siemens, s dng chc nng iu khin PI trong bin tn n nh mc nc, tin hnh vic ci t cc thng s ph hp vi h thng bm n nh mc. H thng hot ng n nh, tin cy, m bo cc yu cu k thut. Xy dng h thng SCADA trn phn mm Wincc vi cc chc nng iu khin, gim st cc thng s k thut nh mc nc, tc ng c, dng in, in pXut bo co hot ng ca h thng hng tun, hng thng.v lu tr d liu. To mt Database ty theo gii v truy cp mt cch ch ng. iu khin gim st thng qua mng LAN.

MC LC

NHIM V N TT NGHIPiiiBN NHN XT N TT NGHIPivBN NHN XT N TT NGHIPvLI CM NviTM TTviiMC LCviiiDANH SCH HNH VxiiiDANH SCH BNG BIUxviDANH SCH CNG THCxviiCHNG 1: GII THIU TNG QUAN V TI11.1.t vn 11.2.Tm hiu v i tng21.2.1.ng dng21.2.2.Gii php cng ngh ang c s dng31.3.La chn gii php v nhim v ti41.3.1.La chn gii php41.3.2.Nhim v ti7CHNG 2: TNG QUAN L THUYT82.1.Nhim v ti82.1.1.Gii thiu chung v bn nc82.1.2.Bn nc s dng trong ti92.2.ng c khng ng b ba pha102.2.1.Cu to102.2.2.Nguyn l hot ng112.3.Cm bin o mc122.4.Gii thut PID132.4.1.iu khin bng khu t l P132.4.2.iu khin bng khu vi phn t l PD132.4.3.iu khin bng khu t l tch phn PI152.4.4.iu khin bng khu vi tch phn t l PID162.4.5.ng dng iu khin PI trong bin tn17CHNG 3: GII PHP TIT KIM NNG LNG193.1.Vn iu khin lu lng ca bm193.1.1.iu khin theo kiu truyn thng193.1.2.iu khin bng bin tn193.2.c tnh ca bm213.3.im lm vic ca ti bm213.3.1.Dng van tit lu iu chnh lu lng223.3.2.Dng bin tn thay i tc ng c233.4.Tnh ton cng sut bm233.5.So snh dng van v dung bin tn24CHNG 4: GIAO THC USS254.1.Tng quan v giao thc USS254.2.Cu trc bc in254.2.1.Tng th254.2.2.Vng s liu PKW274.2.3.Vng x l d liu PZD304.3.S dng cc lnh trong th vin USS334.3.1.Lnh USS_INIT334.3.2.Lnh USS_CTRL344.3.3.Lnh USS_RPM_x37CHNG 5: CI T BIN TN.425.1.Ci t nhanh thng s ng c425.2.Nhp thng s bin tn v bo v qu ti ng c435.3.Ci t bo v bin tn v ng c445.5.Ci t cho php khi ng li455.6.Ti u ha c tnh tng, gim tc465.7.Ci t chc nng gim st moment465.8.Ci t u vo tng t ADC475.9.n nh mc vi chc nng PI485.10.Ci t giao thc USS50CHNG 6: PHT HIN V KHC PHC S C526.1.S c ngun in ngn hn526.2.S c ngun cp nc, ng ng, trn bn.536.2.1.S c ngun cp nc536.2.2.S c ng ng546.2.3.S c trn bn556.3.S c truyn thng556.3.1.S c trong chng trnh556.3.2.S c h bin tn, PLC, cm bin566.4.S c h hng thit b truyn thng56CHNG 7: GII THUT CHNG TRNH577.1.S tng qut h thng577.1.1.Giao tip gia PC v PLC577.1.2.Giao tip PLC v bin tn587.1.3.Cm bin p sut v bin tn587.2.Gii thut chng trnh59CHNG 8: LA CHN THIT B V THI CNG H THNG618.1.La chn thit b618.1.1.La chn thit b ng lc618.1.2.La chn thit b mch iu khin648.2.Thit k h thng658.2.1.Thit k phn c kh658.2.2.Thit k h thng in668.3.Thi cng h thng67CHNG 9: THIT K H THNG SCADA CHO H THNG689.1.Gii thiu chung v cc chc nng s dng trong WinCC689.1.1.WinCC689.1.2.c trng c bn699.1.3.C s d liu ODBC/SQL699.1.4.Cc chc nng s dng trong WinCC719.2.Thit k giao din SCADA trong n799.2.1.Giao din iu khin trung tm799.2.3.Giao din c ghi thng s bin tn849.2.4.Giao din Alarm859.2.5.Giao din Report859.2.6.Giao din Trend/ Table879.3.iu khin gim st qua mng LAN939.3.1.Gii thiu v mng LAN939.3.2.Thit lp kt ni959.3.3.ng dng vo ti97CHNG 10: KT QU THC HIN V HNG PHT TRIN TI9910.1.Kt qu thc hin9910.2.Nhng kh khn gp phi10110.3.Hn ch ti10110.4.Hng pht trin ti101PH LC104I.PLC S7-200, CPU 224XP.(nh km)104II.CU TO V NGUYN L HOT NG CHUNG CA BIN TN()104III.SCADA V PHN MM WINCC..(nh km)104IV.PHN MM STEP7 MICROWIN...(nh km)104V.PHN MM PC ACCESS(nh km)104VI.CHNG TRNH STEP7(nh km)104

DANH SCH HNH VTrangHnh 1.1: h thng bm nc cho chung c cao tng3Hnh 2.1: Bn kn s dng trong cng nghip8Hnh 2.2: Bn h s dng trong cng nghip.9Hnh 2.3: Bn nc s dng trong n10Hnh 2.4: p ng ra ca iu khin bng khu t l (P)13Hnh 2.5: p ng ra ca iu khin bng khu vi phn t l (PD) vi P = 114Hnh 2.6: p ng ra ca iu khin bng khu vi phn t l (PI) vi P = 115Hnh 2.7: S iu khin s dng b iu khin PID17Hnh 3.1 H ng cong c tnh bm21Hnh 3.2 im lm vic ca bm dng van tit lu22Hnh 3.3 Cng sut tn hao vi h thng dng van tit lu22Hnh3.4 im lm vic ca bm dng bin tn23Hnh 4.1 Cu trc tng th bc in26Hnh 4.2 Cu to khi d liu26Hnh 4.3 Cu trc PKE27Hnh 4.4: Cu trc lnh USS_INIT33Hnh 4.5: S dng lnh USS_INT trong ti34Hnh 4.6: Cu trc lnh USS_CTRL34Hnh 4.7: S dng lnh USS_CTRL trong ti37Hnh 4.8: Cu trc lnh USS_RPM_x37Hnh 4.9: S dng lnh USS_RPM_R c gi tr dng in ng c39Hnh 4.10: Cu trc lnh USS_WPM_x39Hnh 4.11: S dng lnh USS_WPM_R thay i gi tr Kp trong iu khin PI41Hnh 7.1: S tng qut h thng57Hnh 8.2 Bn v thit k c kh h thng65Hnh 8.3 Bn v h thng in66Hnh 8.4: M hnh h thng sau khi hon thnh67Hnh 9.1: To mt chng trnh WinCC69Hnh 9.2: Mn hnh lm vic ca WinCC71Hnh 9.3: Mn hnh ci t thuc tnh Runtime72Hnh 9.4: Giao din chng trnh PC Access73Hnh 9.5: Add tag vo WinCC74Hnh 9.6: Mt mn hnh thit k Graphics Designer75Hnh 9.7: Mn hnh Tag Longging75Hnh 9.8: Mn hnh Alarm Longging76Hnh 9.9: Mn hnh to Report Alarm77Hnh 9.10: Mn hnh User Administrator78Hnh 9.11: Mn hnh iu khin trung tm79Hnh 9.13: Giao din c ghi thng s bin tn84Hnh 9.14: Giao din Alarm85Hnh 9.15: File ACCESS c xut ra v lu tr.86Hnh 9.16: th dng in ng c87Hnh 9.17: th in p ng c88Hnh 9.19: th tn s ng c90Hnh 9.20: th in nng tiu th91Hnh 9.21: th mc nc92Hnh 9.22: Mng LAN gm 4 my tnh.93Hnh 9.23: Kiu mng LAN u BUS94Hnh 9.24: Kiu mng LAN u RING94Hnh 9.25: Kiu mng LAN u sao.95Hnh 9.26: Khi to kt ni my ch96Hnh 9.27: iu khin, gim st t my khch qua mng LAN97Hnh 9.28: Giao din SCADA trn my khch98

n tt nghip GVHD: TS.L QUANG C

SVTH: V TRUNG CANPage viii NG XUN HUDANH SCH BNG BIU

Bng 4.1 ngha ca tham s AK28Bng 4.2 ngha tham s AK trong bc in tr li29Bng 4.3 M rng thng s29Bng 4.5 Gi tr tham s STW31Bng 4.6 Gi tr tham s ZSW32Bng 5.1: Thng s Reset gi tr mc nh42Bng 5.2: Ci t nhanh thng s ng c42Bng 5.3: Nhp thng s bin tn v bo v qu ti ng c43Bng 5.4: Ci t bo v bin tn v ng c44Bng 5.5: Ci t chc nng khi ng bm45Bng 5.6: Ci t chc nng t khi ng li45Bng 5.7: Ti u c tnh tng, gim tc46Bng 5.8: Chc nng gim st Moment trong MM43047Bng 5.9: Ci t u vo tng t ADC47Bng 5.11: Gi tr t PI-MOP v gi tr mc nc thc t49Bng 5.12: Ci t giao thc USS50Bng 6.1: Ci t chc nng t khi ng li53Bng 6.2: Ci t chc nng khi ng bm53Bng 6.3: Chc nng gim st Moment trong MM43054Bng 6.4: Ci t u vo tng t ADC55Bng 8.1 Bng chn tit din dy dn63

DANH SCH CNG THCtrang 1.1: Tc ng c 3 pha khng ng b4 2.1: Quan h mc nc vi p sut 13 2.2: Hm truyn khu iu khin t l. 13 2.3: Hm truyn khu iu khin vi phn t l.14 2.4: Hm truyn khu iu khintch phn t l15 2.5: Hm truyn b iu khin PID17 2.6: Mi quan h gia tn hiura u(t) vi tn hiu sai lch e(t) trong b PI17 3.1: Mi quan h Momen v tc ng c ti bm (qut)20 3.2: Mi quan h cng sut, monen v tc ng c ti bm(qut)20 3.3: Mi quan h cng sut v tc ng c ti bm(qut)20 3.4: Tnh chn cng sut bm235.1: Cng thc ni suy 2 im50

DANH SCH T VIT TTSVTH: V TRUNG CANPage xvi NG XUN HU

CHNG 1: GII THIU TNG QUAN V TI

1.1. t vn T ng ha qu trnh cng ngh thc s pht trin v ng dng mnh m trong cng nghip, l s la chn ti u trong mi lnh vc nhm to ra sn phm cht lng cao, tit kim chi ph sn xut to kh nng cnh tranh mnh m trn th trng.Hin nay, s nghip cng nghip ha hin i ha ngy cng pht trin mnh m, s tin b ca khoa hc k thut, trong k thut iu khin t ng cng gp phn rt ln to iu kin nng cao hiu qu trong qu trnh sn xut.Trong cc ngnh cng nghip sn xut cht lng nh ha cht, nc ung ng chai, sa, nc mm, du n, du kh, vn cn iu khin mc lu lng dng chy cn p ng vi chnh xc cao phc v qu trnh sn xut t hiu qu tt hn, m bo qu trnh sn xut cc cht lng khng b gin on, tng tui th thit b, ngi vn hnh khng cn phi trc tip kim tra trong cc bn cha hoc ng m bm lin tc, vn b cn hay trn trong bn cha cht lng hon ton c khc phc cho d u ra thay i.Chnh v vy chng em chn ti l: iu Khin Bm n nh Mc Cht Lng. Vi yu cu ng dng thc t nh th, i tng ti thc hin chnh y l h bn nc, h bn nc c hnh thnh vi h thng bm v van x cht lng nhng lun gi n nh theo gi tr mc t trc, mc cht lng ca bn c duy tr n nh, lm c iu ny th i hi ta phi iu khin lu lng cht lng t my bm vo h thng bn nc, lm mc nc trong bn lun lun gi mt gi tr t trc l khng i, vic iu khin h thng ny gi c mc cht lng trong bn n nh l tng i kh, cn phi c s p ng nhanh iu khin my bm khi lu lng nc x thay i.1.2. Tm hiu v i tng1.2.1. ng dngH thng bm n nh mc c s dng rng ri trong ngnh cng nghip ni chung v ngnh cng nghip cht lng ni ring nh ha cht, nc ung ng chai, du n, sn xut xi mng, sn xut giy, sn xut in nng c bit trong h thng cung cp nc cho h dn, khu chung c, nh cao tng.V d thc t: Nhu cu s dng nc trong khu cng nghip, khu dn c rt khc nhau trong cc thi im ca ngy (cao im v thp im), yu cu t ra l phi gii quyt c vic t ng n nh p sut trn ng ng nc cp, mc nc trn bn cha, v tit kim nng lng cho h thng cp nc. p ng nhu cu p lc nc trong h thng lun khi nhu cu s dng nc thay i bt thng, cc bm trong h thng lun lm vic lin tc ch y ti. Tuy nhin iu ny dn n 1 s bt li sau: p lc nc trong h thng i khi tng qu cao khng cn thit, 1 s thi im nhu cu s dng nc gim xung nhng h thng bm vn chy y ti. iu ny gy lng ph nng lng rt ln. Cc bm phi chy lin tc dn n gim tui th c kh.

Hnh 1.1: h thng bm nc cho chung c cao tng1.2.2. Gii php cng ngh ang c s dngTrong ngnh cng nghip hin nay cc h thng bm n nh mc hu ht c thit k vi cc c im sau: Trm thng c ti thiu 2 bm tr ln, cng cp nc vo mt ng ng chnh. Cc bm c khi ng trc tip hoc sao/tam gic v tt c cc ng c u hot ng tc nh mc. Trong qu trnh trm bm hot ng, thng lun lun mt bm ch dng (mang tnh d phng). Vic iu chnh p lc trn ng ng chnh hay mc nc c thc hin bng 2 cch: Thay i gc m cc van (van tay hoc van in) trong trng hp s thay i p lc khong cho php. Trng hp p lc vn thiu hoc tha ta c th ngt hoc ng thm bm (c th l mt bm, hoc nhiu hn). iu khin ON/OFF. iu khin ON/OFFL kiu diu khin khi bm nc ti mt mc no (t) th cho bm ngng hot ng, v khi nc c tiu th v gim xung ti mc t thp th cho bm chy. u im: Kiu iu khin ON/OFF d thit k, d iu khin, gi thnh thp, ph hp vi ch Stand by. Nhc im: h thng khng n nh, p ng chm v khng tt, mc nc lin tc giao ng xung quanh im t, dng in khi ng ln gy st p, bm ng m lin tc gy gim tui th. iu khin thay i gc m van n nh mc nc cng nh p sut trong ng ng th vn quan tm nht l iu khin lu lng nc bm ln bn n nh mc nc v p sut theo mt im t c nh. C th s dng van in vi tn hiu phn hi ca cm bin a v b iu khin, b iu khin x l a ra tn hiu iu khin ng m van chnh lu lng bm. Hoc s dng van tay iu chnh trc tip. u im: Gi thnh thp, d thit k. Nhc im: Cc bm vn chy y ti v lin tc, iu ny gy lng ph nng lng in v c nhng thi im nhu cu x dng nc gim xung th bm ch cn chy 50% hay 60% cng sut l p ng c. Vic vn hnh kh khn v tn chi ph nhn cng v phi cn cng nhn vn hnh trc tip iu khin gc m valve.Cc bm phi chy lin tc dn n gim tui th phn c kh. Kh kim sot p lc nc lm nh hng tui th ng ng, nh hng tui th cc mi ni.1.3. La chn gii php v nhim v ti1.3.1. La chn gii phpVi cc phng php phn tch nh trn ta c th nhn thy rng vic n nh mc nc c thit k d dng nhng vn cn rt nhiu nhc im. p ng c nhng yu cu v n nh mc nc trong cng nghip cng nh dn dng, hin nay cng vi s pht trin ca khoa hc k thut cng nh ngnh t ng ha cc cng ty ln v lnh vc ny khng ngng pht trin v cho ra ra i cc loi bin tn vi chc nng chnh l thay i tn s ca ng c lm nhim v trn. Nh ta bit tc ng c 3 pha khng ng b ph thuc vo cc thng s nh cng thc sau:

(1.1) Trong : n- Tc ng c (vng/ pht). f- tn s ng c (Hz). p- S cp cc. V vy thay i tc ng c ta c th thay i in p hoc thay i tn s, vic thay i in p li l khng th nn thay i tn s l hp l nht vi vic s dng bin tn ta c th gii quyt c bi ton n nh mc cng vi vic hn ch cc nhc im ca cc phng php khc. Vi vic h tr chc nng iu khin PI, bin tn s nhn tn hiu analog (dng hoc p) t sernsor a v, bin tn s t ng thay i tn s, t thay i tc bm, v th vic khng ch mc nc trong bn tr nn d dng hn rt nhiu.Khi nhu cu x dng nc cao, th bin tn s t ng iu khin ng c quay tc cao nht duy tr mc nc, ngc li khi nhu cu x dng nc thp, bin tn s iu khin ng c gim tc xung hoc dng hn. Khi nng lng in c tit kim. u im khi s dng bin tnVic iu chnh mc nc trong bn hon ton t ng, iu ny s tit kim chi ph nhn cng v khng cn ngi vn hnh.Ton b bm s c iu khin thng qua bin tn.Vi phng php iu khin U/f, iu khin vector, do tc bm c th thay i mt cch linh hot. Dng khi ng c hn ch s khng gy st p khi khi ng s khng nh hng n cc thit b khc.Qu trnh stop, start ca bm c m hn, tc dng gim tn hi cho ng c v mt c kh, cho h truyn ng cng nh v mt in. Chi ph bo dng gim.Tit kim nng lng khi nhu cu x dng thay i nhiu.C cc chc nng bo v: qu p, thp p, qu nhit,bo v nhit ng c, bo v ngn mch,o pha, kt rotor,Khi ng bm t t vi vic ci t thi gian tng tc, trnh gy rung ng ng v s thay i p sut t ngt, trnh nh hng xu cho h thng.C th kt ni truyn thng vi PLC gim st mi hot ng .ng thi vi cc chc nng c sn ta c th gii quyt cc s c k thut nh: ht nc bn di, kt ng ng, ngun in ngn hn. Gii php truyn thng iu khin bin tn thng qua PLC thng thng c cc gii php sau: Dng cc u vo ra s ca PLC, nhng ch thc hin c cc chc nng n gin nh: khi ng, dung, o chiu. Cn vic thay i thi gian khi ng hoc dng, t li tc khng th thc hin c ch ny. thay i gi tr setpoint bin tn mt i 1 u vo analog v 1 u ra analog, ngoi ra cn phi s dng cc u vo ra s iu khin bin tn (rt kho khn s dng trong cc bin tn c 1 u vo s nh MM420). iu khin qua mng Profibus: i vi MM3, MM4 ca Siemens c sn giao din Profibus trn RS485 Port. Nhng i vi cc ng dng nh th vic thit k mt mng Profibus l khng kinh t. Dng Port 0 ca PLC kt ni ti cc Port ca bin tn, 1PLC c th iu khin v gim st c 1 mng ti a 31 bin tn. Mng ny gi l mng USS. Dng kt ni l im-im. Ta c th iu khin ton b cc chc nng ca bin tn thng qua mng ny, ngoi ra cn c th gim st c dng in, in p, tc da vo vng nh m PLC dnh ring cho bin tn. Chi ph cho mng ny l thp v ti u nht cho cc ng dng nh.Vi cc gii php iu khin v gim st bin tn nh trn gii php nhm a ra l s dng giao thc USS kt ni gia PLC v bin tn, rt ph hp cho ng dng nh v c kh nng pht trin thnh mt h thng ln. 1.3.2. Nhim v tiVi gii php c la chn trn nhm s s dng PLC v bin tn gii quyt bi ton bm n nh mc vi cc tnh nng sau: Tnh chn cc thit b ng lc v iu khin. H thng bm v iu khin n nh mc nc ca bn, h thng hot ng tin cy, m bo cc thng s k thut cho trc. Ch hot ng manual, ch t ng, ch gim st v iu khin t xa. H thng t ng iu khin, cho php ci t v thay i cc ch v thng s hot ng. Gii php tit kim v gim st tiu th in nng. Gii quyt cc vn s c k thut nh s c ngun in ngn hn, s c ngun cp nc, s c ng ng, s c trn bn, s c truyn thng. H thng SCADA hai cp: cp iu khin trc tip v cp gim st t xa thng qua mng LAN. Hin th v gim st cc thng s k thut ca h thng nh mc nc, tc bm, tiu th in nng. Lp bo co (report) hng tun, hng thng vn hnh ca h thng. Lu tr d liu vn hnh.

CHNG 2: TNG QUAN L THUYT

2.1. Nhim v ti2.1.1. Gii thiu chung v bn ncBn nc l mt thit b c s dng rng ri trong sn xut v sinh hot, l mt thit b dng ng cht lng nh: nc, xng, du, axit, dung bn nc nh lng cc loi cht mi cn s dng. Ty vo nhu cu s dng m c 2 loi bn nc chnh l bn kn v bn h. Bn kn: l loi bn c ch to kn cch li vi kh, cht lng bn ngoi. Bn kn c s dng trong cc ng dng: Lu tr, trong cc dy chuyn sn xut thc phm, dc phm, ha cht Trong cng nghip sn xut in nng. Trong ni hi cng nghip

Hnh 2.1: Bn kn s dng trong cng nghip

Bn h: S dng trong sinh hot hng ngy. Cung cp nc cho cc qu trnh sn xut. Dng trong cng nghip du kh. Dng trong cng nghip sn xut nh giy, xi mng.

Hnh 2.2: Bn h s dng trong cng nghip.2.1.2. Bn nc s dng trong tiV l bc u lm quen vi i tng bm n nh mc nn nhm la chn loi bn h c dung tch nh, kch thc nh, vt l v sai s khi n nh l tng i lnH thng bn nc c s dng trong n gm 2 bn: Bn di c kch thc: di 1.1m, rng 90cm, cao 50cm, dung tch ti a c th cha l gn 0.45. c s dng cung cp nc cho my bm. Bn trn c kch thc: di 50cm, rng 50cm, cao 1m, dung tch ti a c th cha l 0.25. c s dng cha nc cung cp cho sn xut, s dng. Yu cu n nh mc.

Hnh 2.3: Bn nc s dng trong n

2.2. ng c khng ng b ba pha2.2.1. Cu toCu to ca my in khng ng b bao gm hai b phn chnh l stator v roto Stator: c hai phn chnh l li thp v dy qun. Li thp stator hnh tr gm nhiu l thp k thut in ghp li. Mt trong c nhng rnh cha b dy qun pha. Dy qun stator lm bng cc dy dn bc cch in, t trong cc rnh c phn b u dc theo chu vi ca li thp. Dy qun stator nhn in t mt ngun 3 pha to ra mt t trng quay. Tc quay ca t trng ny ph thuc tn s ngun in v s cc ca b dy qun. Roto: cng c hai phn chnh l li thp v dy qun. Li thp roto hnh tr gm nhiu l thp k thut in ghp li. Mt ngoi c nhng rnh cha dy qun. C hai loi: lng sc v dy qun. Lng sc: gm cc thanh ng hoc nhm t trong rnh, v b ngn mch bi hai vnh ngn mch hai u. Vi ng c nh, roto c c nguyn khi, gm thanh dn, vnh ngn mch, cnh tn nhit v qut.Vi ng c ln, cc thanh bng ng c t vo cc rnh roto v sit cht vo vnh ngn mch. Nh khng c vnh trt v chi than nn rt bn, chc, t cn bo tr. Cc thanh dn thng nghing so vi trc (ta c cm tng nh roto b vn xon); v cc l do: Lm cho momen quay khng b dao ng v my t n khi lm vic. Trnh c v tr rng roto song song v i din vi rng stator, tc l v tr t tr cc tiu v roto s b kha" . Tng chiu di tc dng ca thanh dn. Dy qun: l dy qun 3 pha c cng s cc nh dy qun stator, dy qun roto lun lun u Y v c 3 u ra u vo 3 vnh trt ny dn in ra mt bin tr 3 pha u Y nm ngoi ng c, dng khi ng hoc iu chnh tc .2.2.2. Nguyn l hot ng Nhn in nng t li in v bin thnh c nng chuyn ra ti. C tc quay nh hn tc t trng, quay cng chiu vi t trng. Dng in 3 pha c th to ra t trng quay rt mnh. Khi cho dng in 3 pha chy vo 3 cuc dy Stator t cch nhau 120. Trn vng trn th trong Stator xut hin t trng quay Fs . T trng Fs sinh ra trong cun dy Stator cng dao ng iu ha nh dng in 3 pha u vo, t trng ny mc vng qua rotor v cm ng trn rotor mt in p cm ng. Rotor ngn mch s c dng in chy trong rotor. Dng in vo Stator gy ra t trng Fs ,dng in trn Rotor gy ra t trng Fr. Hai t trng ny tng tc vi nhau to ra monent ko Rotor chuyn ng theo hng t trng quay Fs . Hoc t thng do dng in Rotor sinh ra hp vi t thng ca Stator to thnh t thng tng khe h gia Stator v Rotor. T thng tng ny tc dng vi dng Rotor tao ra monent ko rotor chuyn ng theo hng t trng quay Fs.2.3. Cm bin o mcYu cu chnh ca chng ta l n nh mc nc trong bn vy iu quan trng u tin l lm sao xc nh chnh xc mc nc thc trong bn ti mt thi im nht nh, v vy phi c thit b c gi tr mc nc trong bn a v b iu khin, thit b thng c dng l cm bin o mc nc. Cm bin o mc nc th trong thc t c 3 loi c th p ng nhu cu ny: Cm bin mc. Cm bin siu m. Cm bin p sut: lm vic theo nguyn tc so snh p sut ca bn nc vi p sut ca kh quyn lm chun a ra tn hiu in.p sut ca cm bin c th chuyn i thnh mc nc trong bn theo t l nh sau: 1m=0.1 kg/ 1m=0.1 bar (2.1) 1m=9806.38 PaCn c vo ng dng ca cc loi cm bin o mc v cc yu t nh gi c, nh cung cp nhm la chn cm bin p sut o mc nc thc trong bn.2.4. Gii thut PID2.4.1. iu khin bng khu t l P y l hnh thc iu khin bng cch a tn hiu iu khin da vo s khc bit mc nc gia mc nc thc t ca i tng v mc nc t, vi KP c xem l khuch i t l ca b iu khin.W = Kp.(TS TO)(2.2)

Hnh 2.4: p ng ra ca iu khin bng khu t l (P) Ta thy h s khch i KP cng ln th sai s xc lp cng nh tuy nhin p ng ca h thng cng dao ng, vt l cng cao. Nu KP tng qu gii hn th h thng s tr nn mt n nh. Do khng th c sai s ca h thng bng 0 v cng khng th tng h s khch i ln v cng.2.4.2. iu khin bng khu vi phn t l PDVn v tnh n nh v qu tm trong iu khin t l vi khuch i ln, c th c gim i khi thm vo l khu vi phn cho tn hiu sai s.

(2.3)Vi KD = KP .TD; TD : l thi hng vi phn ca b iu khin PDK thut c gi l k thut iu khin PD. Khu vi phn c th hiu chnh kh nng p ng s thay i ti mc nc t, l gim vt l , p ng ra c(t) bt nhp nh hn, c biu din hnh sau:

Hnh 2.5: p ng ra ca iu khin bng khu vi phn t l (PD) vi P = 1Da vo p ng qu ca h thng khi thay i gi tr TD v gi h s KP bng hng s. Ta thy TD cng ln th p ng cng nhanh, thi gian ln cng ngn. Tuy nhin, nu thi gian ln nhanh qu th s dn n vt l mc d p ng khng c dao ng.B hiu chnh PD khng th thc hin bng cc linh kin mch th ng, c th dng khch i thut ton, in tr v t in. Nhc im ca b PD ny l rt nhy v nhiu v bn thn b PD l mch lc thng cao, vi li ln hn 1 s lm tng s nh hng ca tn hiu nhiu.

2.4.3. iu khin bng khu t l tch phn PIVn v sai s xc lp c th khc ph bng hiu chnh PI. Hiu chnh PI c tc dng lm chm p ng qu , tng vt l, gim sai s xc lp. Do h s khch i ca khu PI bng v cng ti tn s bng 0 nn khu hiu chnh PI lm cho sai s i vi tn hiu vo l hm nc ca h thng khng c khu tch phn l tng bng 0 (h v sai bc 1). Ngoi ra khu PI l mt b lc thng thp nn n cn c tc dng trit tiu nhiu tn s cao tc ng vo h thng.

(2.4)

Vi: e() = TS T0Ki = Kp/TI, TI l thi hng tch phn ca b iu khin PI

Hnh 2.6: p ng ra ca iu khin bng khu vi phn t l (PI) vi P = 1Khu hiu chnh PI lm cho sai s xc lp ca h thng i vi tn hiu vo l hm nc bng 0. Tuy nhin khu hiu chnh PI li lm cho h thng km n nh do lm tng thi gian xc lp.Da trn p ng qu ca h thng khi gim thi hng tch phn TI th vt l ca h thng cng cao, h thng cng chm xc lp. Vy hng s thi hng tch phn TI ta nn cho gi tr ln nhm hn ch vt l. Tuy vy khi TI bng hng s th nh hng ca P n cht lng ca h thng chnh l nh hng ca khu khch i, P cng tng th vt l cng cao, tuy nhin thi gian qu li khng thay i.2.4.4. iu khin bng khu vi tch phn t l PIDB iu khin PID c s dng rt rng ri trong thc t iu khin nhiu loi i lp, vi u vo thay i theo hm nc s gy ra vt l v trong vi trng hp l khng chp nhn c i vi mch ng lc. S c mt ca khu vi phn t l (PD) lm gim vt l v p ng ra bt nhp nh hn v h thng s p ng nhanh hn. Khu tch phn t l(PI) c mt trong h thng s dn n sai lch tnh trit tiu( h v sai). Mun tng chnh xc ta phi tng h s khuch i, song vi mi h thng thc u b hn ch v s c mt ca khu PI l bt buc. Khu hiu chnh vi tch phn t l (PID) kt hp nhng u im ca khu PI v PD, c kh nng tng d tr pha tn s ct, kh chm pha. S c mt PID vng hi tip c th dn n s dao ng trong h do p ng qu b vt l bi hm Dirac (t).Cc b hiu chnh PID c ng dng nhiu trong cng nghip di dng thit b iu khin hay thut ton phn mm.Do s thng dng ca n nn nhiu hng sn xut thit b iu khin cho ra i cc b iu khin thng mi rt thng dng.Thc t cc phng php thit k b iu khin PID dng qu o nghim s, gin Bode hay phng php gii tch rt t c s dng do vic kh khn trong xy dng hm truyn i tng. Phng php ph bin nht chn tham s PID thng mi hin nay l phng php Ziegler-Nichols.

Hnh 2.7: S iu khin s dng b iu khin PIDB iu khin PID c hm truyn lin tc nh sau:

(2.5)Vi cc gi tr Kp, Ki, Kd l cc hng s thc.Phng trnh vi tch phn m t s tng quan gia tn hiu ra u(t) vi tn hiu sai lch e(t) ca b iu khin PID l:

(2.6)Trong :e(t) l sai lch trong h thng e(t) = r(t) c(t). r(t) v c(t) l tn hiu vo v p ng ra ca h thng.Vn thit k l cn xc nh gi tr Kp, Ki, Kd sao cho tho mn cc yu cu v cht lng.i tng khc nhau nh nhit l nhit, tc ng c, mc cht lng trong bn cha, L do b iu khin ny c s dng rng ri l v n c kh nng trit tiu sai s xc lp, tng p ng qu , gim vt l nu cc tham s b iu khin c chn la thch hp.Khu hiu chnh khuch i t l (P) c a vo h thng nhm lm gim sai s xc 2.4.5. ng dng iu khin PI trong bin tnTrong hu ht cc dng bin tn ca cc hng, t bit cc dng dnh cho ng dng bm/ qut iu tch hp sn cc b iu khin PI hoc PID iu ny lm cho ngi s dng d thit k v vn hnh h thng hn. i vi cc ng dng i tng c qun tnh nh nh p sut,lu lng, mc nc th ch cn s dng b iu khin PI l .Vi cc i tng c qun tnh ln nh nhit th phi s dng b iu khin PID.i tng iu khin trong ti l mc nc v vy nhm s s dng chc nng PI c sn trong bin tn n nh mc nc qua cng c gng s dng ht cc chc nng bin tn h tr cho cc ng dng bm/ qut.

CHNG 3: GII PHP TIT KIM NNG LNG

3.1. Vn iu khin lu lng ca bm3.1.1. iu khin theo kiu truyn thngBm s c cp ngun trc tip .Bm lun hot ng ch nh mc.Vic thay i lu lng thng thng dng van tit lu Nhn xt : Tng tr khng ng ng . Lu lng gim nhng cng sut tiu hao gim rt t V d : Khi ta dng valve tit lu gim lu lng bm xung cn 80% so vi nh mc. Theo bnh thng th vi 20% lu lng gim i th cng sut tiu tn cng gim i mt lng ng k,nhng c th y ch nng lng tiu tn l khong 95% (ch gim 5% cng sut trn 20% lu lng gim). 3.1.2. iu khin bng bin tnBm ,qut c cp ngun qua bin tn. Bm c th hot ng cc ch khc nhau ty thuc vo yu cu.Vic thay i lu lng c thc hin thng qua vic thay i tt ng c. Nhn xt: Khng cn tn tht nng lng trn valve nh kiu truyn thng. Bm cng khng phi sinh ra cng sut trn trc ln hn nhu cu thc t chng li sc cn trn valve.V d: Khi dng bin tn iu khin bm,nu ta mun gim lu lng xung 80% so vi nh mc.Ta ch cn iu chnh bin tn gim tc ng c xung.Quan h gia moment ti v tc ng c (vi ti bm qut) l:

M=n (3.1) Cng sut: P=Mn (3.2)

P n (3.3)

Nu ta gim tc xung cn 80% (0.8) th cng sut ch cn bng (0.8) 0.5 iu ny cho ta thy rng bm s ch hot ng vi 50% cng sut nh mc l c th t c 80% lu lng dn n tit kim in.

3.2. c tnh ca bm L mi quan h gia p sut v lu lng .H c tnh ca bm khi tc bm thay i c trnh by nh hnh sau.

Hnh 3.1 H ng cong c tnh bm3.3. im lm vic ca ti bmim lm vic ca bm l giao im ca ng cong ca bm v ng cong ca h thng. Ta xt ng c c tc nh mc l n= 1480 RPM.

3.3.1. Dng van tit lu iu chnh lu lng

Hnh 3.2 im lm vic ca bm dng van tit lu

Cng sut tn hao i vi h thng dng van tit lu.

Hnh 3.3 Cng sut tn hao vi h thng dng van tit lu

3.3.2. Dng bin tn thay i tc ng c

Hnh3.4 im lm vic ca bm dng bin tn

3.4. Tnh ton cng sut bmCng sut bm c tnh bng tch ca lu lng nhn vi p sut. y chnh l din tch trn ng c tuyn. Ta c cng thc tnh cng sut nh sau: xt lu lng Q tnh theo (m3 /s) P = (d * H * Q) / k (3.4) Vi:d: Khi lng ring ca cht c bm (kg/m3) .H: cao ct p cn bm (m) .Q: lu lng bm (m3/s) .k: T s gia cng sut u ra vi cng sut trn trc ca bm.

3.5. So snh dng van v dung bin tn Dng valve tit lu: ng c lun chy vi cng sut nh mc, vic thay i lu lng thng qua vic thay i ng m ca valve. iu ny s gy tn hao nng lng khi chy lu lng thp (ti bm) Dng bin tn: Ton b h thng bm qut s c iu khin thng qua bin tn. p sut ca ton h thng khng i vi mi lu lng (cm bin p sut trn ng ng phn hi thng s v cho bin tn). Vi phng php iu khin U/f , iu khin vector ,do tc c th thay i mt cch linh hot. Dng khi ng c hn ch s khng gy st p khi khi ng s khng nh hng n cc thit b khc. Qu trnh stop ,start c mm ha nn gim tn hi cho ng c v mt c kh, cho h truyn ng cng nh v mt in. Chi ph bo dng gim. Khng gii hn s ln khi ng . Tit kim nng lng khi ti thay i lin tc.

CHNG 4: GIAO THC USS

4.1. Tng quan v giao thc USSGiao thc USS (Universal Serial Interface Protocol) nh ngha mt kiu truy cp theo nguyn tc master-slave cho thng tin lin lc thng qua bus ni tip .Giao thc USS l kiu truyn thng ca Siemens dnh ring cho PLC S7-200 v bin tn ca hng. Qua giao thc ny 1 PLC c th iu khin ti a mt mng gm 32 bin tn, Dng kt ni l im-im. Ta c th iu khin ton b cc chc nng ca bin tn thng qua mng ny, ngoi ra cn cn c th gim st c dng in, in p, tc , hng quay...da vo cc lnh trong th vin USS cho mi bin tn. Chi ph cho mng ny l thp v ti u nht cho cc ng dng nh v va. s dng c giao thc ny yu cu bin tn phi c h tr giao thc USS, phn mm step7-micorowin phi ci t th vin USS. S dng port 0 ca PLC kt ni USS ,khi chn port 0 cho truyn thng USS khng s dng port 0 vi bt k mc ch khc .V vy thc hin vic gim st h thng cn la chn PLC c 2 port truyn thng ,c th trong lun vn s dng PLC s7200 -224xp. Cc gi tr ca cc lnh USS yu cu 400 byte ca vng nh V ca PLC ,v vy trc khi lp trnh phi khai bo vng nh V v khi lp trnh khng s dng li vng nh ny.S7-200 v bin tn c kt ni truyn thng USS qua cp RS485.Chn s 3 port 0 ca PLC kt ni vi chn 14(P+) ca bin tn ,chn s 8 ni vi chn 15(N-).4.2. Cu trc bc in4.2.1. Tng thMi bc in bt u vi k t STX (=02hex) tip theo l chiu di khi d liu (LGE) v byte a ch (ADR). Bc in kt thc bng k t (BBC).Trong : STX: l mt byte ASCII (02hex) c s dng bit bt u mt k t. LEG: Quy nh chiu di khi d liu.Khi d liu c chia lm 2 khu vc PKW( tham s ID-gi tr khu vc) PZD (x l d liu) ADR: l mt byte duy nht c cha a ch ca slave BBC: l mt byte kim tra xc nhn tin nhn c s dng. Nu bin tn nhn c mt tin nhn khng hp l th bin tn s khng tr li.

Hnh 4.1 Cu trc tng th bc in Cu to khi d liu

Hnh 4.2 Cu to khi d liuPKW: cha d liu thng sPKE: cha yu cu, thng sIND: cha gi tr m rng thng s v gi tr indexPWE: cha gi tr yu cu.PZD: cha word iu khin word gim stSTW: cha word iu khin.ZSW: cha word gim stHSW: cha im t tn s.HIW: cha gi tr tn s thc t.i vi MM420 ch h tr loi bc in PPO1 v PPO3.

4.2.2. Vng s liu PKWVng PKW bao gm 4 word, word 1 cha tham s PKE, word 2 cha tham s IND, word 3 v 4 cha tham s PWE Tham s PKE: C di 1 word

Hnh 4.3 Cu trc PKET bit 0 ti bit 10 cha s ca thng s, bit 11 khng c s dng, t bit 12 ti bit 15 c dng yu cu c hay vit thng s ti bin tn.

Bng 4.1 ngha ca tham s AKAK ngha

0Khng yu cu

1c tham s

2Vit tham s word

3Vit tham s double word

4Yu cu m t ngha

6Yu cu c gi tr tham s l 1 mng

7Vit tham s dng mng c di 1 word

8Vit tham s dng mng c di double word

9Yu cu s lng mng thc hin

11Vit tham s dng mng c di 1 word v lu vo EEPROM

12Vit tham s dng mng c di double word v lu vo EEPROM

13Vit tham s dng mng c di 1 word t v lu vo EEPROM

14Vit tham s dng mng c di double word v lu vo EEPROM

Thng ta ch s dng AK=0, 1, 2, 3

Bng 4.2 ngha tham s AK trong bc in tr liAK ngha

0Khng tr li

1Chuyn gi tr tham s word

2Chuyn gi tr tham s double word

3Chuyn phn t m t

4Chuyn gi tr tham s dng mng c di word

5Chuyn gi tr tham s dng mng c di double word

6Chuyn s lng mng phn t

7Khng thc hin c yu cu

8Khng c trng thi iu khin master cho giao din PKW

Tham s IND C di 1 word.T bit 0 ti bit 7 cha gi tr index, bit 8 ti bit 11 khng s dng, bit 12 ti bit 15 cha gi tr m rng thng sBng 4.3 M rng thng s Tham s PWE C di 2 word, cha gi tr thng s bao gm PWE 1 v PWE 2.

4.2.3. Vng x l d liu PZDVng d liu PZD c thit k iu khin v gim st bin tn. i vi MM420 thng s dng PZD vi chiu di 2word.Bng 4.4 Cu trc PZD PZD1 PZD2

PLC MM420 STW HSW

MM420 PLC ZSW HIW

Tham s STWC chiu di 1 word. Tham s STW c chc nng iu khin bin tn trn ng truyn USS.Bng 4.5 Gi tr tham s STWBitChc nng Gi tr

Bit 00ON/ OFF10 No - 1 Yes

Bit 01OFF 21 No - 0 Yes

Bit 02OFF 31 No - 0 Yes

Bit 03Kch hot xung0 No - 1 Yes

Bit 04Kch hot RFG0 No - 1 Yes

Bit 05Khi ng RFG0 No - 1 Yes

Bit 06Kch hot im t0 No - 1 Yes

Bit 07Xc nhn li0 No - 1 Yes

Bit 08Chy nhp phi0 No - 1 Yes

Bit 09Chy nhp tri0 No - 1 Yes

Bit 10iu khin t PLC0 No - 1 Yes

Bit 11o im t0 No - 1 Yes

Bit 12Khng s dng0 No - 1 Yes

Bit 13Tng im t MOP0 No - 1 Yes

Bit 14Gim im t MOP0 No - 1 Yes

Bit 15Bng tay/ t xa0 P0719 set 01 P0719 set 1

Tham s HSW Cha gi tr tn s t Tham s ZSW Tham s ny c dng gim st hot ng bin tn trn ng truyn USS.Bng 4.6 Gi tr tham s ZSWBitChc nng Gi tr

Bit 00Bin tn sn sng0 No - 1 Yes

Bit 01Bin tn sn sng hot ng0 No - 1 Yes

Bit 02Bin tn ang hot ng0 No - 1 Yes

Bit 03Bin tn c li 1 No - 0 Yes

Bit 04Off 2 hot ng1 No - 0 Yes

Bit 05Off 3 hot ng0 No - 1 Yes

Bit 06Inhibit hot ng0 No - 1 Yes

Bit 07Cnh bo bin tn hot ng0 No - 1 Yes

Bit 08 lch im t/ gi tr thc t1 No - 0 Yes

Bit 09iu khin PZD0 No - 1 Yes

Bit 10t tn s ti a0 No - 1 Yes

Bit 11Cnh bo dng in gii han motor1 No - 0 Yes

Bit 12Phanh hm ng c hot dng1 No - 0 Yes

Bit 13ng c qu ti1 No - 0 Yes

Bit 14ng c chy ng chiu0 No - 1 Yes

Bit 15Bin tn qu ti1 No - 0 Yes

Tham s HIW Cha gi tr tn s thc t ang hot ng

4.3. S dng cc lnh trong th vin USSTh vin ca STEP 7- Micro/Win cung cp 14 chng trnh con, 3 th tc ngt v mt tp lnh (gm 8 lnh) h tr cho giao thc USS. Nh th vin ny m vic PLC iu khin gim v st bin tn tr nn d dng hn rt nhiu so vi cc giao thc khc. Cc khi hm c th hin mt cch trc quan gip vic thit lp mt chng trnh iu khin khng my kh khn.4.3.1. Lnh USS_INIT Hnh 4.4: Cu trc lnh USS_INIT Lnh USS_ INIT c s dng cho php thit lp hoc khng cho php truyn thng vi cc bin tn. Trc khi bt k mt lnh USS no khc c s dng, lnh USS_INIT phi c thc hin trc m khng c xy ra li no. Khi lnh thc hin xong v bit Done c set ln ngay lp tc trc khi thc hin lnh k tip. Lnh ny c thc hin mi vng qut khi u vo EN c tc ng. Thc hin lnh USS_INIT ch mt ln cho mi s thay i trng thi truyn thng. S dng lnh chuyn i dng to mt xung u vo EN. Khi thay i gi tr ban u cc tham s s thc hin mt lnh USS_ INIT mi.Gi tr cho u vo Mode la chn giao thc truyn thng: u vo c gi tr 1 s n nh Port 0 dng cho giao thc USS v ch cho php lm vic theo giao thc ny. Nu u vo c gi tr 0 s n nh Port 0 dng cho giao thc PPI v khng cho php lm vic theo giao thc USS. Tc truyn c t cc gi tr: 1200, 2400, 4800, 9600, 19200, 38400, 57600 v 115200 (baud). u vo Active dng xc nh a ch ca Drive. Ch h tr s a ch Drive t 0 n 31. Khi lnh USS_INIT kt thc, u ra Done c set ln. u ra Error (kiu byte) cha kt qu thc hin lnh. ng dng trong ti khai bo giao thc USS Hnh 4.5: S dng lnh USS_INT trong ti4.3.2. Lnh USS_CTRL

Hnh 4.6: Cu trc lnh USS_CTRLLnh USS_CTRL c s dng iu khin hot ng ca bin tn. Lnh ny c a vo b m truyn thng, t y, lnh c gi ti a ch ca bin tn, nu a ch c xc nh tham s Active trong lnh USS _ INIT. Ch mt lnh USS _CTRL c n nh cho mi Drive. Bit EN phi c set ln mi cho php lnh USS_CTRL thc hin. Lnh ny lun mc cao (mc cho php). Bit RUN (RUN/STOP) cho thy bin tn l on hoc off. Khi bit RUN mc cao, bin tn nhn lnh khi ng tc danh nh v theo chiu chn trc. Drive lm vic, cc iu kin phi theo ng nh sau: a ch Drive phi c la chn t u vo Active trong lnh USS_INIT. u vo OFF2 v OFF3 phi c set 0. Cc u ra Fault v Inhibit phi l 0. Khi u vo RUN l OFF, mt lnh c chuyn n MM iu khin gim tc ng c xung cho n khi ng c dng. u vo OFF2 c s dng cho php iu khin MM dng vi tc chm. u vo OFF3 c s dng cho php iu khin MM dng vi tc nhanh. Bit Resp_R bo nhn phn hi t Drive. Tt c cc hot ng ca bin tn c thm d thng tin trng thi. Ti mi thi im, S7-200 nhn mt phn hi t Drive, bit Resp_R c set ln v tt c cc gi tr tip theo c cp nht. Bit F_ACK (Fault Acknowledge) c s dng nhn bit li t Drive. Cc li ca Drive c xo khi F_ACK chuyn t 0 ln 1. Bit Dir (Direction) xc nh hng quay m bin tn s iu khin. u vo Drive (Drive address) l a ch ca bin tn m lnh USS_ CTRL iu khin ti. a ch hp l t 0 n 31. u vo Type (Drive type) dng la chn kiu bin tn. i vi th h MM3(hoc sm hn) u vo Type c t 0; cn i vi MM4 gi tr t l 1. Speed-SP (speed setpoint) l tc cn t theo t l phn trm. Cc gi tr m s lm ng c quay theo chiu ngc li. Phm vi t: -200% 200%. Error l mt byte li cha kt qu mi nht ca yu cu truyn thng n Drive. Status l mt word th hin gi tr phn hi t bin tn. Speed l tc ng c theo t l phn trm. Phm vi: -200% n 200%. D-Dir: cho bit hng quay. Inhibit: cho bit tnh trng ca inhibit (0 - not inhibit, 1-inhibit ). xo bit inhibit ny, bit Fault phi tr v off, v cc u vo RUN, OFF2,OFF3 cng phi tr v off.Fault: cho bit tnh trng ca bit li ( 0 - khng c li, 1- li ). Drive s hin th m li. xo bit Fault, cn phi cha li xy ra li v set bit F_ACK.

ng dng trong ti iu khin bin tn MM420

Hnh 4.7: S dng lnh USS_CTRL trong ti4.3.3. Lnh USS_RPM_x

Hnh 4.8: Cu trc lnh USS_RPM_xC 3 lnh c cho giao thc USS. USS_RPM_W: l lnh c mt tham s Word. USS_RPM_D: l lnh c mt tham s Douple Word. USS_RPM_R: l lnh c mt tham s thc. u vo Drive l a ch ca MM m lnh USS_RPM_x c chuyn ti. a ch hp l l 0 n 31. Param l s tham s (l gi tr cn c t bin tn). Index l con tr ch vo gi tr c. Trong 1 tham s c th c nhiu Index, gi tr Index chi r gi tr c.Value l gi tr ca thng s phn hi.u vo DB_Ptr c cung cp bi a ch ca b m 16 byte. Trong lnh USS _RPM_x, b m ny dng cha kt qu ca lnh a n t MM.Khi lnh USS_RPM_x hon tt, u ra Done c set ln v u ra Error (kiu byte) v u ra Value cha cc kt qu ca vic thc hin lnh. u ra Error v Value s khng hp l cho n khi u ra Done c set ln. ng dng lnh USS_RPM_x trong ti Trong ti s dng lnh USS_RPM_x nhm mc ch c gi tr cc thng s trong bin tn gim st nh: tc ng c, mc nc, tn s, dng in, in nng tiu thv cng c th c cc thng s khc lc cn thit.

Hnh 4.9: S dng lnh USS_RPM_R c gi tr dng in ng c

4.3.4. Lnh USS_WPM_x

Hnh 4.10: Cu trc lnh USS_WPM_x C 3 lnh ghi cho giao thc USS: USS_WPM_W: l lnh ghi mt tham s Word. USS_WPM_D: l lnh ghi mt tham s Double Word. USS _WPM_R: l lnh ghi mt tham s thc. u vo Drive l a ch ca MM m lnh USS_WPM_x c chuyn ti. a ch hp l l 0 n 31. Param l tham s cn ghi.Index l bin ch vo gi tr ghi.Value l gi tr ca thng s cn ghi n b nh RAM trong bin tn.u vo DB-Ptr c cung cp bi a ch ca b m 16 byte. Trong lnh USS _WPM_x, b m ny dng cha kt qu ca lnh a n t bin tn.Khi lnh USS_WPM_x hon tt, u ra Done c set ln v u ra Error (kiu byte) cha cc kt qu ca vic thc hin lnh.Khi u vo EEPROM c set ln, lnh s ghi vo c b nh RAM v EEPROM ca bin tn. Khi u vo EEPROM khng c set th lnh ny s ch ghi vo b nh RAM. ng dng lnh USS_WPM_x trong ti Trong ti lnh USS_WPM_x c s dng khi ta cn thay i mt tham s bt k trong bin tn m khng c ti hin trng. Lnh ny cho php thay i gi tr thng s bin tn qua mn hnh gim st, qua mng LAN cng nh vic thay i cc thng s k thut mt cch d dng.

Hnh 4.11: S dng lnh USS_WPM_R thay i gi tr Kp trong iu khin PI

CHNG 5: CI T BIN TN

5.1. Ci t nhanh thng s ng cTrong bin tn MM420 cho php ci t nhanh cc thng s trn nhn ng c nh: in p nh mc, dng in nh mc, tn s nh mc thc hin vic ny u tin ta reset li bin tn cc gi tr mc nh.Bng 5.1: Thng s Reset gi tr mc nh Thng s M t Gi tr Ghi ch/ n v

P0010 Thng s vn hnh 30 Ci t gi tr mc nh

P0971 Reset thng s mc nh 1 Bt u reset

Tin hnh ci t nhanhBng 5.2: Ci t nhanh thng s ng c Thng s M tGi tr Ghi ch/n v

P0003Mc truy cp ngi dng2Mc M rng

P0010Ci t thng s1Ci t nhanh

P0100Tiu chun chu u/ Bc m0Chu u [Kw] ,tn s 50hz

P0304in p nh mc ng c220V

P0305Dng in nh mc ng c3.2A

P0307Cng sut nh mc ng c0.75KW

P0308H s cng sut0Bin tn t d h s

P0310Tn s nh mc 50Hz

P0311Tc nh mc ng c2850Rpm

P0335 Ch lm mt ng c0Lm mt t nhin

P1300 Lut iu khin2Cho ti bm /qut

5.2. Nhp thng s bin tn v bo v qu ti ng cBng 5.3: Nhp thng s bin tn v bo v qu ti ng cThng s M t Gi tr Ghi ch / n v

P0700 Chn ngun lnh5 USS trn ng truyn COM

P1000 im t tn s5 USS trn ng truyn COM(dng cho ch manual)

P1080 Tn s nh nht0Hz

P1082 Tn s ln nht50Hz

P1120 Thi gian tng tc10s

P1121 Thi gian gim tc10s

P0640 H s qu ti ng c100Bng dng nh mc ng c / %

P3900 Kt thc ci t nhanh1

5.3. Ci t bo v bin tn v ng cBng 5.4: Ci t bo v bin tn v ng cThng s M t Gi tr Ghi ch/ n v

P0290Ch phn ng qu ti bin tn 0 Gim tn s u ra ph hp vi bm,qut

P0292Cnh bo nhit bin tn 15S chnh lnh nhit gia ngng dng v ngng cnh bo

P0294Cnh bo qu ti bin tn 95

P0295Thi gian qut tt khi bin tn dng 5Thi gian tr qut tt khi bin tn dng, n v s

P0610Tc ng khi nhit ng c n ngng cnh bo 2 Cnh bo ,dng ,bo li

P0614Mc cnh bo qu nhit ca ng c 100%

5.4. Ci t chc nng khi ng bmL hnh thc bt theo cng tc ang quay ca ng c. V d nh khi ng c mt in hay restart, ng c s khng bt u t tc 0 m bin tn s o tn s thc t ca Rotor ang quay v bt u xut pht t tn s . u im: khi ng li ng c ang chy s khng b git, khng li, trong ng dng bm c th hn ch hin tng ba nc bo v ng ng, vic ci t c thc hin bng bin tn

Bng 5.5: Ci t chc nng khi ng bmThng s M t Gi tr Ghi ch / n v

P1200 Khi ng bm 4 Kch hot khi ng theo chiu t trc

P1202Dng in khi ng bm 50 i vi ti qun tnh khng ln nn gim gi tr dng in khi ng bm, n v % dng nh mc ng c

P1203Di tm tn s ng c 100

5.5. Ci t cho php khi ng liVi chc nng ny bin tn s t khi ng li sau s c thp p,mt ngun trong thi gian ngn.C th s dng gii quyt s c ngun in ngn hn.Bng 5.6: Ci t chc nng t khi ng liThng s M t Gi tr Ghi ch/ n v

P1210T khi ng 4Khi ng li sau s c thp p, mt ngun thi gian ngn

P1211S ln t khi ng li cho php4

5.6. Ti u ha c tnh tng, gim tcBng 5.7: Ti u c tnh tng, gim tcThng s M t Gi tr Ghi ch/ n v

P1130on cong ban u khi tng tc theo ng cong S (n v tnh theo s) 2giy

P1131on cong th hai khi tng tc theo ng cong S (n v tnh theo s) 2giy

P1132on cong ban u khi gim tc theo ng cong S (n v tnh theo s) 2giy

P1133 on cong cui cng khi gim tc theo ng cong S (n v tnh theo s) 2giy

P1134Phng php ng cong S 0 Lin tc lm trn

5.7. Ci t chc nng gim st momentVi chc nng ny ta c th gii quyt cc s c nh ht nc bn di, trn bn, tc ngn ng ng. y l gii php gii quyt cc s c k thut trong ti, nhng i vi bin tn MM420 c nhm s dng khng h tr chc nng ny nn nhm chn gii php khc gii quyt vn trn l dng phao in bo ht nc bn di v trn bn trn .Chc nng ny c th c ng dng trong bin tn MM430 v cc dng khc.

Bng 5.8: Chc nng gim st Moment trong MM430Thng sM tGi trGhi ch / n v

P2181Ch pht hin s c6

P2182Ngng tn s 15Hz

P2183Ngng tn s 230Hz


P2185Ngng Momen trn 10.8Nm

P2186Ngng Momen di 10.5Nm


P2188Ngng Momen di 21Nm



P2192Thi gian tr5s

5.8. Ci t u vo tng t ADCCi t thng s cho u vo tng t c c s ph hp ca tn hiu output cm bin v u vo tng t ca bin tn. Vi tn hiu a v t cm bin l 1-5 v cho gi tr t 0-2m nc .Trong ti nhm ch cn o t 0-1m nc.Bng 5.9: Ci t u vo tng t ADCThng sM tGi trGhi ch/n v

P0757Gi tr x1 ca thang o ADC1V

P0758Gi tr y1 ca thang o ADC0%



P0761Chiu rng gii cht ADC2V

5.9. n nh mc vi chc nng PICh PI cho php ngi s dng kch hot/ khng kch hot b iu khin PI. Ch ci t ti gi tr 1 s kch hot b iu khin PI vng kn v s t ng loi b thi gian tng tc/gim tc c t trc P1120 v P1121 cng im t tn s thng thng.Bng 5.10: Ci t chc nng PIThng s M t Gi tr Gh ch/ n v

P2200 Kch hot b iu khin PI 1

P2253 Ngun im t PI 2250Ngun im t MOP

P2240 Gi tr im t PI-MOPTy yu cuGi tr 0-100% tng ng 0-4000H

P2257Thi gian tng tc im t 5giy

P2258Thi gian gim tc im t 5giy

P2264Tn hiu phn hi PI 755.0 Ngun phn hi ADC

P2280H s t l Kp 2C th hiu chnh

P2285Hng s thi gian tch phn Ti 15C th hiu chnh

P0702u vo s 2 13 Tng gi tr im t MOP

P0703u vo s 3 14 Gim gi tr im t MOP

Cch xc nh gi tr cho im t PI-MOP Gi tr im t PI MOP chnh l gi tr mc nc m chng ta cn n nh trong chc nng PI.Cm bin p sut a v tn hiu t 0 3 V( scale trong ci t u vo tng t) tng ng t 0 -1m .Khi a v bin tn bin tn tip tc chuyn i t 0-3V sang 0-100% tng ng 0-1m nc. Gi tr im t PI MOP c gi tr t 0-100% tng ng 0-1m nc ty theo yu cu s ci t gi tr ny. V d mun n nh mc nc 0.3 m ta ci t P2240 = 30 .Nhng l trn l thuyt vi gi tr cm bin a v l hm tuyn tnh, trong thc t qua nhiu ln thc nghim nhm nhn thy rng gi tr cm bin a v khng tng ng tuyt i vi mc nc m c sai s.C th ta xem xt bng sau.Bng 5.11: Gi tr t PI-MOP v gi tr mc nc thc tGi tr t PI-MOP(P2240) (%) 15 25 35 40

Gi tr mc nc thc t khi n nh (cm) 15 24 34,5 40,5

Da vo bng trn ta c th thy sai s khi h thng n nh .Sai s ny chng ta phi chp nhn v khng th can thip loi b hon ton nhng vi phng php ni suy 2 im ta c th gim bt c sai s ny. Vi gi tr Y1 tng ng X1, gi tr Y2 tng ng X2, ta cn bit gi tr Y nm gia Y1 v Y2 khi bit X ta c cng thc sau

Y = (5.1)

V d ta mun gi tr t n nh l 30 cm (X ). Ta cn tm gi tr t cho P2240 (Y), nhn bng 7.11 ta thy gi tr n nh 30 nm gia gi tr X1= 24 v gi tr X2=34,5 .Tng ng Y1 =25 v Y2 = 35. Rp vo cng thc 5.1 ta tnh c Y30,7 . Vy mun h thng n nh mc 30 cm th gi tr t l 30,7.

5.10. Ci t giao thc USSBng 5.12: Ci t giao thc USS Thng s M t Gi tr Ghi ch/ n v

P2010 Tc baud USS 7 19200 baud

P2011 a ch bin tn 00- 31

P2012 Chiu di PZD USS 2Word

P2013 Chiu di PKW USS 127 Chiu di thay i

P0971Lu d liu vo EEPROM1

CHNG 6: PHT HIN V KHC PHC S C

S c k thut l mt iu khng mong mun cng khng th trnh khi trong khi vn hnh bt k mt h thng no. C nhng s c khng gy nh hng nhiu ti s hot ng ca h thng nhng c nhng s c c th gy h hng c h thng t t n nhiu v vy vn pht hin v khc phc s c lun l mt iu quan tm trong khi thit k v vn hnh h thng.Trong h thng bm nc nhm tng hp, phn tch, v a ra gii php khc phc cc sc c gy ra nh hng ln cho h thng.6.1. S c ngun in ngn hnVn ngun in cung cp cho h thng hot ng l ht sc quan trong, s n nh v ngun in l yu t quan trong trong vic t hiu qu cao trong sn xut, ngun in khng nhng nh hng ti cht lng sn xut, s lng sn xut m con c th lm gim tui th ca thit b nu khng n inh.Trong ti nhm phn tch s c ngun in ngn hn: l ngun in khng n nh, chp chn s c ny gy nh hng ti cc thit b nh bin tn, bm v cc thit b khc. khc phc s c ny nhm la chn gii php c t ch AUTO START v ch FLY.AUTO START: l chc nng gip bin tn khi ng li sau khi c in li, gip h thng vn hnh lien tc hn. Trong trng hp ngun qu khng n nh h thng s ngng hot ng hn bng cch ci t s ln cho php khi ng li.FLY: l ch khi ng bm, gip bin tn khi ng ngay tc hin ti khi m cha v 0, ch ny gip gim ti a h hng v mt c kh ca my bm cng nh bin tn.Bng 6.1: Ci t chc nng t khi ng liThng s M t Gi tr Ghi ch/ n v

P1210T khi ng 4Khi ng li sau s c thp p, mt ngun thi gian ngn

P1211S ln t khi ng li cho php4

Bng 6.2: Ci t chc nng khi ng bmThng s M t Gi tr Ghi ch / n v

P1200 Khi ng bm 4 Kch hot khi ng theo chiu t trc

P1202Dng in khi ng bm 50 i vi ti qun tnh khng ln nn gim gi tr dng in khi ng bm, n v % dng nh mc ng c

P1203Di tm tn s ng c 100

6.2. S c ngun cp nc, ng ng, trn bn.6.2.1. S c ngun cp ncBm chy khng ti khng nhng gy hng hc v c kh m cong tn hoat mt lng nng lng khng c ch, gii php tit kim nng lng a ra nhm phn tch v khc phc s c ngun in ngn hn.Nh bit moment my bm ti l nghch vi tc my bm, khi khng c ti moment ca my bm s gim, bng cch thit lp di moment lm vic ca ng c ta s kim sot c thi im moment gim nh hn di lm vic bnh thng v pht hin s c ngun cp nc.Bin tn MM420 khng h tr ch gim st moment, vi gii php a ra nhm xin trnh by cch ci t chc nng gim st moment trong MM430.Bng 6.3: Chc nng gim st Moment trong MM430Thng sM tGi trGhi ch / n v

P2181Ch pht hin s c6

P2182Ngng tn s 15Hz




P2186Ngng Momen di 10.5Nm





P2192Thi gian tr5S

Theo nh phn tch MM420 khng c chc nng gim st moment nn nhm chn gii php khc l dng phao in gn bn di pht hin s c ht nc ngun cp.6.2.2. S c ng ngTrong khi vn hnh ng ng c s c s gy h hng v h thng in ca h thng v vy cn c gii php chng tc ngn ng ng v khc phc s c khi ng ng b xi, v.S dng chc nng gim st moment ta cng c th pht hin c s c tc nghn ng ng v b ng ng. Ci t nh bng 6.3.Cng nh phn tch nh trn MM420 khng c chc nng gim st moment nn nhm la chn gii php khc: S dng van 1 chiu v chc nng FLY trong bin tn khc phc cc s c ny (bng 6.2). Ci t thng s bo v qu ti ng c trong thi gian di P0640 H s qu ti ng c100Bng dng nh mc ng c / %

6.2.3. S c trn bnS c trn bn gy tht thot ti nguyn khng cn thit v c th gy h hi n cc thit b in xung quanh.Gii php ca nhm: Ci t gii hn u ra ca tn hiu ADC pht hin khi nc trong bn vt qua ngng , s dng phao in gn nh bn pht hin nc trong bn y Bng 6.4: Ci t u vo tng t ADCThng sM tGi trGhi ch/n v





P0761Chiu rng gii cht ADC2V

6.3. S c truyn thng6.3.1. S c trong chng trnhTrong chng trnh c s c trong cc lnh truyn thng nh trng nh, ngoi phn vng nh h thng s bo li v ngng hot ng ca h thngKhc phc s c:Khi bo li trong cc lnh truyn thng PLC s xut ra m li, t m li ta s tra ra li v khc phc li trong cc lnh truyn thng (Tra m li trong SCADA)6.3.2. S c h bin tn, PLC, cm binKhi c s c h hng cc thit b trong h thng nh bin tn, PLC, cm bin th h thng s chuyn sang ch cho bm chy vi in p li in. Chuyn ch bng nt nhn trn h thng. (Km theo bn v Autocad).6.4. S c h hng thit b truyn thng Khi cc thit b truyn thng nh PLC, bin tn xy ra h hng th h thng cho bm chy vi li in, iu khin bng cc nt nhn trn m hnh.V mt s hn ch trong ti nn nhm ch a ra gii php cho vn m cha thc hin cKm theo bn v u ni v vn hnh

CHNG 7: GII THUT CHNG TRNH

7.1. S tng qut h thng

Hnh 7.1: S tng qut h thng

7.1.1. Giao tip gia PC v PLCPC v PLC giao tip vi nhau thng qua phn mm Wincc, PC Access. T PC lnh truyn xung PLC thc hin vic iu khin, ngc li PLC phn hi tn hiu v PC gim st v thu thp d liu h thng .PLC ng vai tr Master trong h thng v cng l cu ni gia bin tn v PC.T mn hnh gim st c th ra lnh cho PLC bt u chng trnh, kt thc chng trnh, ci t cc thng s theo mun (mc nc t, h s Kp, Ti.) cng nh thay i cc thng s bin tn, qun l cc li h thngGim st cc thng s cn thit nh mc nc, in p, dng in, nng lng tiu th. Cc gi tr ny c thu thp di dng th.7.1.2. Giao tip PLC v bin tnPLC v bin tn giao tip vi nhau qua giao thc USS, bin tn ng vai tr Slave.Bin tn nhn lnh trc tip t PLC, v p ng mi yu cu t PLC. Qua giao tip ny ngi s dng c th truy nhp vo bin tn t xa khng nht thit phi truy nhp bng keypad thng thng.7.1.3. Cm bin p sut v bin tnCm bin p s ghi nhn gi tr mc nc hin ti bn sau xut ra tn hiu in p t 0-5 V a v u vo analog ca bin tn .Khi nhn c tn hiu phn hi chc nng PI trong bin tn tnh ton a ra tn hiu iu khin cho ng c bm chy nhanh hay chm.

7.2. Gii thut chng trnh

Gii thch chng trnh Sau khi kt ni xong cc thit b, cp ngun cho h thng .Khi ng PLC, bt mn hnh gim st trn WinCC.Khi khi ng PLC vic u tin PLC thc hin l kch hot truyn thng USS vi bin tn t lc ny PLC cp nht lin tc cc thng s k thut nh mc nc trong bn, in p, dng in, tc ng c t bin tn a v mn hnh gim st. T mn hnh gim st ta chn ch hin trng hoc t xa, ch hin trng cho php iu khin trc tip trn bng iu khin ca h thng, ch t xa cho php iu khin qua mn hnh gim st, v qua mng LAN.Ti 1 thi im ch c th iu khin 1 ch . Tip theo chn ch Auto hoc Manual, c th chn trn mn hnh gim st hoc bng iu khin ty thuc vo trc chn ch hin trng hay t xa. Vi ch Auto sau khi chn PLC s kch hot b iu khin PI trong bin tn, vic cn lm u tin l nhp cc thng s ca h thng nh gi tr mc nc t, h s t l Kp, hng s thi gian tch phn Ti.Sau khi c lnh Start PLC s ra lnh cho bin tn hot ng vi chc nng PI .T y h thng t ng hot ng n khi c lnh Stop.(Start=0). Vi ch Manual, khi c chn h thng hot ng theo iu khin ca ngi vn hnh.Ch c h tr 2 cp tc cho ngi vn hnh d iu khin.Khi chn tc 1 PLC s ra lnh cho bin tn hot ng tn s 50Hz, bm hot ng vi gi tri nh mc.Khi chn tc 2, PLC ra lnh bin tn hot ng tn s 25Hz, bm hot ng vi tc bng 1/2 tc nh mc c th tit kim nng lng tiu th.H thng dng khi c lnh Stop( Start=0).

CHNG 8: LA CHN THIT B V THI CNG H THNG

8.1. La chn thit b8.1.1. La chn thit b ng lc Chn ng c v bm:Trong ti chn ng c i lin vi bm vi cc thng s nh sau: Bm trc ngang. ng c 3 pha khng ng b. Cng sut ng c 0,75 KW. in p nh mc ng c 220 V. Dng in nh mc ng c 3,2 A. Tn s nh mc ng c 50Hz. Tc nh mc ng c 2850 rpm. Lu lng bm 90 lt/pht Chn bin tn Chn bin tn hng Siemens th h MM420 chuyn bm qut vi dy cng sut nh .Chn cng sut bin tn bng cng sut ng c 0,75 KW.Hnh8.1: Catalog bin tn MM420 Chn CB bo v ngn mch bin tnChn CB bo v bin tn theo khuyn co ca Siemens v cc thit b i km vi bin tn. CB c thng s chnh nh sau: Dng in nh mc Idm=16 A. Dng ngt tc thi 208 A. Dng ngt ngn mch Icu= 50KA. Chn Contactor iu khin ng ngt bin tnChn Contactor theo khuyn co ca Siemens v cc thit b i km vi bin tn . Contactor c thng s chnh nh sau: Dng in nh mc Idm=17 A. in p cun coil 230V, 50/60Hz Chn cu ch bo v mch iu khin Cu ch c chc nng bo v ngn mch mch iu khin, chn cu ch c dng nh mc ln hn hoc bng dng in ln nht ca mch iu khin. S dng 1 cu ch cho dy pha vo mch iu khin .Thng s cu ch nh sau: Dng in nh mc Idm=17 A, Dng nh mc Idm=4 A. in p nh mc 220v.

Chn cp in mch ng lc

Chn dy dn mch ng lc gm c dy dn cho u vo bin tn v dy dn u ra bin tn. Tit din dy dn chn theo khuyn co ca Siemens.Chn tit din dy vo v ra bin tn l 2 mmBng 8.1 Bng chn tit din dy dn

Chn cm bin analog o mc nc o mc nc bn cha c nhiu loi cm bin s dng nh cm bin mc, cm bin p sut, cm bin siu m. Ty theo yu cu v tng loi cht lng m chn cm bin ph hp, trong ti s dng cm bin p sut n nh mc nc. Cm bin p sut hng Sensys c thng s nh sau : Di o 0-0.2 par tng ng 0-2m nc Ngun cp 11- 28 Vdc Tn hiu output 0 - 5 Vdc Sai s 0,25%.8.1.2. La chn thit b mch iu khin Chn PLC Trong ti c s dng truyn thng USS vi bin tn ng thi gim st hot ng ca h thng nn cn PLC c 2 port truyn thng .1 port truyn thng vi bin tn qua giao thc USS, 1 port kt ni vi my tnh gim st qua cp PPI.V vy nhm chn PLC s7-200 CPU 224 xp . Thng s c bn: 14u vo s (DI), 10 u ra s (D0). 2 u vo tng t 0-10V(AI), 1 u ra tng t 0-10V hoc 0-20mA (AO). 2 port truyn thng Chn nt nhn Chn nt nhn t th cho cc trng thi Start, Stop, Xa li. Chn switch cho ch Auto/Manual v chn tc 1 / tc 2.Chn nt nhn gi, hi khi vn xoay cho trang thi E-Stop Chn n bo Chn n bo cho cc trang thi Strat, Stop, Error vi cc thng s sau: in p nh mc 220 VAC Dng in nh mc 20mA Ngun DC 24V S dng ngun DC 24V lm ngun cp cho PLC v cm bin. Ngun c cng sut 80W Chn Relay S dng relay nhm mc ch cch ly PLC v mch iu khin bo v PLC.Chn relay c thng s sau: in p nh mc 220VAC Dng in nh mc 10A in p cun coil 24VDC S tip im 2NO, 2NC.8.2. Thit k h thng8.2.1. Thit k phn c khPhn c kh ca h thng c thit k trn phn mm autocard .Gm c khung st lm gi , 2 bn nc, bn di c nhim v cung cp nc , bn trn s dng n nh mc theo yu cu ti.

Hnh 8.2 Bn v thit k c kh h thng

8.2.2. Thit k h thng inBn v h thng in, s u ni c thit k trn phn mm autocard.Hnh 8.3 Bn v h thng in

8.3. Thi cng h thngSau khi c bn v c kh v h thng in nhm tin hnh thi cng c kh v u ni cc thit b .Hnh di y l m hnh h thng sau khi hon thnh.

Hnh 8.4: M hnh h thng sau khi hon thnh

CHNG 9: THIT K H THNG SCADA CHO H THNG

9.1. Gii thiu chung v cc chc nng s dng trong WinCC9.1.1. WinCCWinCC l vit tt ca Window Control Center (Trung tm iu khin chy trn nn Window), ni cch khc n cung cp cc cng c phn mm thit lp mt giao din iu khin chy trn cc h iu hnh ca Microsoft nh WinXP, Win7 Trong dng sn phm thit k giao din phc v cho vn hnh gim st, WinCC thuc th hng SCADA (c tnh nng iu khin gim st v thu thp d liu) vi nhng chc nng hu hiu cho vic iu khin.Mt trong nhng c im ca WinCC l c tnh m. N c th s dng mt cch d dng vi cc phn mm chun v phn mm ca ngi s dng, to nn giao din ngi- my p ng nhu cu thc t mt cch chnh xc. Nhng nh cung cp h thng c th pht trin ng dng ca h thng qua WinCC nh mt nn tng m rng h thng.

Hnh 9.1: To mt chng trnh WinCC9.1.2. c trng c bnWinCC ang c ng dng trong nhiu lnh vc khc nhau, ph bin nht l t ng ha qu trnh iu khin v gim st quy trnh sn xut. Khi mt h thng s dng chng trnh WinCC iu khin v thu thp d liu t qu trnh, c th m phng cc s kin xy ra trong qu trnh bng cc s , hnh nh trc quan.Ngoi kh nng thch ng cho vic xy dng cc h thng c qui m nh v va khc nhau, WinCC cn c th d dng tch hp vi nhng ng dng c qui m ln nh h thng qun l vic thc hin sn xut MES (Manufacturing Excution System) v h thng ERP (Enterprise Resource Planning).9.1.3. C s d liu ODBC/SQLC s d liu SQL c tch hp sn trong WinCC. Tt c cc d liu v cu hnh h thng v cc d liu ca qu trnh iu khin c lu gi trong c s d liu ny. Ngi dung c th d dng truy cp ti d liu ca WinCC thng qua SQL v ODBC. Truy cp ny cho php WinCC chia s d liu vi cc ng dng v c s d liu khc chy trn nn Window.ng dng trong lun vn: s dng SQL to mt c s d liu v lu cc thng s hot ng ca h thng theo chu k 2s cp nhp thng s 1 ln, ta c th truy cp vo c s d liu to ny bng nhiu hnh thc, trn my ch, trn my con qua mng Internet. S dng ODBC to mt c s d liu file Access, access lu cc thng s hot ng ca h thng.

9.1.4. Cc chc nng s dng trong WinCCGiao din lm vic ca chng trnh WinCC

Hnh 9.2: Mn hnh lm vic ca WinCC

Computer : ci t cc thuc tnh RuntimeCho php ci t cc thuc tnh khi chy ch Runtime nh: Alarm Longging. Tag Longging. Report. Graphics.

Hnh 9.3: Mn hnh ci t thuc tnh Runtime

Tag Management:La chn kt ni gia PLC v phn mm WinCC nh: OPC Kt ni PLC v WinCC qua PC Access PC Access:

Hnh 9.4: Giao din chng trnh PC Access Chn driver kt ni PC Access v WinCCVo giao din WinCC click chut phi Tag Management\Add New driver\OPC. Add tag vo WinCC:Trong th Tag Management chn OPC click chut phi vo OPC Groups chn System ParameterLocal\ S7-200.OPC Server\ Brose Server\ Next\ S7-200 OPCServer\ Microwin\ SCADA_MASTER chn tag cn add click Add Items click OK.

Hnh 9.5: Add tag vo WinCC

Graphics Designer L h thng ha ca WinCC x l tt c u vo u ra hin th trn mn hnh trong qu trnh hot ng. Kh nng hin th thng tin iu khin di dng ha vi cc cng c c sn: Cc hnh v ca cc phn t tiu biu (bm, quat, van, nt nhn, n ). Cc phm, hp thoi, thanh trt. Cc mn hnh ng dng v hin h. Cc i tng OLE, ActiveX.

Hnh 9.6: Mt mn hnh thit k Graphics Designer Tag Longging Chc nng c s dng thu thp d liu ca qu trnh cng ngh hin th chng v lu tr, ta c th t do nh dng cc kiu d liu khi lu tr chng. Cc gi tr ca qu trnh c th hin bng bng trc tuyn (Online Table) v th (Trend)

Hnh 9.7: Mn hnh Tag Longging Alarm Longging H thng Alarm ca WinCC cung cp y thng tin v cc li v trng thi ni chung trong qu trnh hot ng. N th hin cc thng bo trong hin ti cng nh trong qu kh. Cc thng bo ny gip ngi vn hnh sm pht hin ra cc s c khc phc kp thi trnh cc s c. Ta c th t do la chn cc khi thng bo, cc th hng thng bo, cc dng thng bo, cc kiu hin th thng bo.

Hnh 9.8: Mn hnh Alarm Longging

Report Designer WinCC cung cp h thng bo co cho php ta a cc d liu ra giy. N in cc bo co v th t thng bo, bo co v vic lu tr cc thng bo, bo co v hot ng ca ngi vn hnh, bo co v cc thng bo ca h thng, bo co ca ngi s dng v bo co di dng vn bn in ty .

Hnh 9.9: Mn hnh to Report Alarm

User Administrator Cho php phn quyn cho cc i tng. To cc USER thc hin vic ng nhp vo h thng. User Admistrator c th la chn 2 chc nng cho mi User: Ch c kh nng gim st. Va gim st va iu khin

Hnh 9.10: Mn hnh User Administrator

9.2. Thit k giao din SCADA trong nTrong thi i cng ngh sn xut hin i ngy nay, h thng iu khin gim st v thu thp d liu c p dng ngy cng rng ri trong cc nh my, x nghip sn xut t ng. H thng SCADA c th kt ni vi rt nhiu thit b o c v iu khin cc thit b chp hnh t khong cch rt xa (ln n vi ngn cy s).SCADA (Supervisory Control And Data Acquisition) l mt h thng iu khin gim st v thu thp d liu. c th iu khin v gim st t xa th h SCADA phi c h thng giao thc truy cp, truyn ti d liu cng nh h giao din gia ngi v my (HMI Human Machine Interface).Thit k giao din SCADA cho h thng thc hin cc chc nng: gim st, iu khin v thu thp d liu.9.2.1. Giao din iu khin trung tm

Hnh 9.11: Mn hnh iu khin trung tm

Giao din l mt h thng SCADA mini, thc hin cc chc nng iu khin, gim st v thu thp d liu.Mn hnh giao din iu khin tch hp cc chc nng ca mt h thng SCADA, t mn hnh iu khin chnh ta c th thc hin truy cp n tng chc nng trong h thng.Mn hnh iu khin trung tm gm cc chc nng: Phn chc nng chuyn mn hnh iu khin v gim st, nh ngha cc nt nhn: INFORMATION: Chuyn ti mn hnh thng tin v ti, thng tin v gio vin hng dn, sinh vin thc hin v mn hnh ng nhp vo h thng. CONFIGURATION: Chuyn ti mn hnh vi chc nng hin th cu hnh ca h thng, CONTROL INTERFACE: L giao din iu khin chnh ca h thng. ALARM: Chuyn ti mn hnh ALARM, hin th cc cnh bo cho h thng. REPORT: Xut d liu ra file Access, lu tr d liu hot ng ca h thng READ/WRITE DATA: Chuyn n mn hnh c ghi cc thng s ca bin tn. ERROR CODE: Chuyn ti mn hnh tra li ca h thng khi c li xy ra. EXIT: C chc nng thot khi mn hnh RUNTIME. TREND: chuyn ti mn hnh th hin th v bng gi tr ca cc thng s khi h thng hot ng, bao gm: Dng in ng c in p ng c Tc ng c Tn s ng c in nng tiu th Mc nc trong bn Chc nng PI: L phn c ghi cc gi tr Setpoint, Kp, Ti trong chc nng t ng ca h thng. WRITE: Thc hin chc nng ghi cc gi tr PI vo bin tn bao gm SETPOINT1: ghi gi tr Setpoint khi bin tn dng. SETPOINT2: Ghi gi tr Setpoint khi bin tn ang hot ng. KP: Ghi gi tr KP trong iu khin PI ca bin tn. TI: Ghi gi tr Ti trong iu khin PI ca bin tn. Phn iu khin: gm cc nt nhn thc hin cc chc nng: FIELD: Chn ch iu khin cho h thng l hin trng, tc l vn hnh h thng bng cc nt nhn m hnh v gim st h thng trong mn hnh SCADA, xut d liu t mn hnh gim st. Khi chn ch ny s v hiu ha ch MONITORING. Ch ny dnh cho cc k s vn hnh m hnh thc t. Vn hnh ch ny c cc nt nhn: Cng tc chuyn ch AUTO/MANUAL. Nt nhn START: Cho h thng hot ng. Nt nhn STOP: Cho h thng ngng hot ng. Nt nhn FAUL: Xa li h thng sau khi khc phc s c. Nt nhn E_STOP: Dng h thng khn cp khi c s c. Cng tc chn tc cho ch MANUAL. V cc n hin th cc trang thi h thng ang hot ng. MONITORING: Chn ch iu khin cho h thng l gim st, tc l vn hnh v gim st h thng qua mn hnh SCADA. Khi chn ch ny s v hiu ha ch FIELD. ch ny s c cc phm chc nng: AUTO: Chn ch hot ng l t ng, thc hin chc nng iu n nh mc nc bng chc nng PI trong bin tn, gim st v thu thp d liu bng mn hnh SCADA. MANUAL: Chn ch iu khin cho h thng l bng tay, l vn hnh my bm chy 2 tc cho trc. SPEED1: Tc 1 ca my bm ch bng tay. SPEED2: Tc 2 ca my bm ch bng tay. START: Cho h thng bt u hot ng ch iu khin l MONITORING. STOP: Cho h thng ngng hot ng ch iu khin l MONITORING. CLEAR_ERROR: Xa li sau khi khc phc xong li ca h thng, c thc hin ch iu khin MONITORING. E_STOP: Cho h thng dng khn cp khi c s c xy ra ch iu khin l MONITORING. H thng hin th n: Mn hnh gm 9 n hin th cc chc nng c chn v ch ang chy: ERROR: C s c xy ra. SPEED1: My bm chy tc 1. SPEED2: My bm chy ch 2. MONITORING: Chn ch iu khin l gim st . FIELD: Chn ch iu khin l hin trng. AUTO: Ch t ng ang hot ng MANUAL: Ch bng tay ang hot ng RUN: H thng ang chy STOP: H thng dng li. Chc nng hin th: Mn hnh iu khin trung tm hin th cc thng s ca h thng: Dng in ng c. in p ng c. Tc ng c. Tn s ng c. in nng tiu th. Mc nc.9.2.2. Giao din thng tinGiao din th hin thng tin ca n gm: Tn trng. Tn n. Tn gio vin hng dn. Tn sinh vin thc hin. ng nhp h thng bng nt nhn LONGIN/LONGOUT Chuyn qua mn hnh iu khin trung tm CONTROL INTERFACEHnh 9.12: Giao din thng tin9.2.3. Giao din c ghi thng s bin tnMn hnh gm 2 chc nng c v ghi thng s ca bin tn: c thng s: mn hnh c thng s thc hin chc nng c tt c cc thng s ca bin tn, nhp thng s cn c v vo P(R) v thng s s c c v khi nhn nt READ. Trong thng s bin tn c 2 kiu d liu ca thng s chnh l WORD v REAL. Cc gi tr tng ng s c hin cc tng ng. Ghi thng s vo bin tn: Mn hnh ghi thng s vo bin tn thc hin cc chc nng ghi thng s cn ci t vo bin tn. Bin tn cho php ghi 2 kiu d liu l WORD v REAL vo qua truyn thng USS. Nhp thng s cn ci t vo P(R) v nhp gi tr mun ghi vo GI TR WORD v GI TR REAL. Trc khi ghi thng s vo bin tn cn xc nh kiu d liu ca thng s mi thc hin vic ghi thnh cng.

Hnh 9.13: Giao din c ghi thng s bin tn

9.2.4. Giao din AlarmGiao din ALARM: Mn hnh ALARM th hin cc cnh bo ca h thng, gip tao bit c h thng ang hot ng nh th no v khi xy ra s c c th bit c s c g, v tr s c, cch khc phc s c Hnh 9.14: Giao din Alarm9.2.5. Giao din ReportMn hnh REPORT ca h thng SCADA thc hin chc nng lu tr d liu vn hnh ca h thng v to mt Database theo mun ca ngi s dng.Trong chc nng lu tr d liu in bo co: thc hin chc nng ny bng cch to mt Table gm cc d liu cn in ra bo co, sau mi ngy, mi ca vn hnh c th in bo co bng phm Print trong giao din REPORT.To Database: S dng ngn ng VBS v cc hm c h tr sn ca Siemens xut d liu ra file Access hoc SQL. Qua d liu to ta c th truy cp vo h thng d liu v xem thng tin vn hnh ca h thng bt c lc no. Bng cch to 12 file Access trc h thng SCADA s t lu d liu v, trong mi file c 31 table, mi table lu d liu hot ng ca 1 ngy.Cc thng s ca h thng ca m hnh cn in n Dng in ng c. in p ng c. Tc ng c. Mc nc trong bn. in nng tiu th. Ngi ng nhp. Thi gian.

Hnh 9.15: File ACCESS c xut ra v lu tr.

9.2.6. Giao din Trend/ TableGiao din TREND/TABLE th hin th v bng gi tr cc thng s ca h thng.Da vo th v bng gi tr ta co th thy c mt cch tng th v thng s khi h thng hot ng, qua ta c th nh gi c p ng, chnh xc ca thng s khi h thng hot ng, da vo ta c th iu chnh cho ph hp vi yu cuTrong cc giao din TREND/TABLE gm cc thng s: Dng in ng c: th hin gi tr dng in ca ng c bng th v bng gi tr, qua ta c th thy c cc thi im c s c nh qu dng, v bit c p ng ca dng in trong qu trnh hot ng ca h thng.

Hnh 9.16: th dng in ng c in p ng c: Th hin gi tr in p ca ng c bng th v bng gi tr, qua ta c th thy c cc thi im c s c nh qu p, thp p, v bit c p ng ca in p trong qu trnh hot ng ca h thng.

Hnh 9.17: th in p ng c

Tc ng c: th hin tc ng c bng th v bng gi tr, qua ta c th gim st c p ng ca tc trong qu trnh chy v gim st c li ca h thng.

Hnh 9.18: th tc ng c

Tn s ng c: Th hin gi tr ca tn s ng c bng th v bng gi tr.

Hnh 9.19: th tn s ng c

in nng tiu th: Th hin gi tr ca cng sut tiu th ca h thng bng th v bng gi tr. Qua ta c th nh gi c mc tiu th in nng ca h thng, a ra nhng gi php v tit kim nng lng cng nh k hoch u t nhng h thng tng t.

Hnh 9.20: th in nng tiu th

Mc nc: Th hin mc nc ca h thng qua th v bng gi tr. Qua ta c th gim st c p ng ca mc nc, v a ra nhng iu chnh trong cch iu khin c c p ng nh yu cu

Hnh 9.21: th mc nc

9.3. iu khin gim st qua mng LAN9.3.1. Gii thiu v mng LANLAN l vit tt ca cm t Local Area Netwwork (Mng cc b) cc my tnh trong mt khu vc hn ch c th kt ni vi nhau qua cc dy cp, qua kt ni m cc my tnh c th trao i thng tin, d liu cho nhau, dung chung cc thit b ngoi vi.Mng LAN c nhiu quy m v mc phc tp khc nhau, n c th ch lin kt vi ba my tnh c nhn v dng chung mt thit b ngoi vi t tin nh my in lazer chng hn. Cc h thng phc tp hn th c my tnh trung tm (My ch Server) cho php nhng ngi dng trao i thng tin vi nhau v thm nhp vo cc c s d liu dng chung.

Hnh 9.22: Mng LAN gm 4 my tnh.Phm vi ng dng ca mng LAN: mng LAN thng c s dng kt ni cc my tnh trong 1 gia nh, trong 1 qun NET, trong mt ta nh, c quan, trng hc. Gii hn ca mng LAN l phm vi bn knh 100m. c li xa hn ngi ta thng s dng mng Internet kt ni.Cc kiu kt ni ca mng LAN: Mng LAN kiu u BUS:

Hnh 9.23: Kiu mng LAN u BUSVi kiu u BUS my tnh c kt ni vi nhau thng qua mt trc cp, u mi cp c mt Terminador nh du im kt thc ca ng trc. Mi my tnh c kt ni vi trc cp thng qua transceptor. u im: tit kim dy cp. Nhc im: tc chm. Nu trc cp h th h thng ngng hot ng. Khi c s c th rt kh kim tra v sa li. Mng LAN kiu u RING (u vng):

Hnh 9.24: Kiu mng LAN u RINGCc my tnh trong mng u vi 1 cp trc khp kn u im: tit kim dy cp, tc nhanh hn kiu BUS. Nhc im: nh kiu u BUS.

Mng LAN u kiu sao:

Hnh 9.25: Kiu mng LAN u sao.Cc my tnh trong mng c kt ni vi mt thit b chung nh HUB, SWITCH u im: cho tc nhanh nht. Cc my c lp vi h thng, khi c 1 my h th h thng vn hot ng bnh thng. D dng kim tra v sa li. Nhc im: tn km v dy v thit b trung gian.9.3.2. Thit lp kt niTrong phn mm WinCC c chc nng Web Nevigator cho php ngi iu khin c th vn hnh, gim st h thng qua mng cc b (LAN). thc hin c iu ny yu cu my ch phi ci t phn mm WinCC bao gm : giao din SCADA v c ci t Web - Nevigator sever .My khch khng cn ci t phn mm Wincc, ch cn ci t Web - Nevigator client. Sau khi tha mn cc yu cu trn ta tin hnh thit lp cc bc sau. Khi to trn my ch Trong giao din chnh Wincc kch phi vo mc Web-Nevigator chn Web- view Publisher. Trong ca s hin rat a chn Next, tip theo add tt c cc Graphics Designer m ta to cho giao din SCADA, chn next cho n khi kt thc, Trong giao din chnh Wincc kch phi vo mc Web-Nevigator chn Web- Configurator. Trong ca s hin ra chn next , sau in cc thng tin nh hnh nn di. Phn quan trong nht l a ch IP nu my khch v my ch kt ni chung vi Modem Internet th a ch IP t ng c to .Nu my khch v my ch n thun c ni vi nhau bng cp RJ45 th ta phi tin hnh to IP tnh cho my ch v my khch. Hon thnh ta chn Finish

Hnh 9.26: Khi to kt ni my ch Nh ni trn nu my khch v my ch kt ni qua modem Internet th ti y l hon thnh vic khi to .Cn vi trng hp kt ni qua RJ45 ta phi tin hnh to IP tnh trc sau dng a ch khi to. Sau khi khi to kt ni thnh cng ta lp cc User ng nhp vi cc chc nng khc nhau trong phn User Administrator. Ty vo i tng ta c th cp cho User va iu khin va gim st hoc ch c gim st.

ng nhp t my khch Sau khi to xong User ,t my khch ta s dng trnh duyt web Internet Expoler nhp a ch IP my ch, sau dng User ng nhp vo giao din SCADA . giao din SCADA ny c y chc nng m giao din SCADA chnh c.9.3.3. ng dng vo tiVic s dng chc nng Web-Nevigator gip cho nhm gii quyt c yu cu iu khin v gim st qua mng LAN trong ti.

Hnh 9.27: iu khin, gim st t my khch qua mng LAN

Hnh 9.28: Giao din SCADA trn my khch

CHNG 10: KT QU THC HIN V HNG PHT TRIN TI

10.1. Kt qu thc hinSau mt thi gian tm hiu cc ng dng, gii php, cch thc hin nhm thc hin c m hnh bm n nh mc dng PLC v bin tn , trong qu trnh thc hin nhm lun bm st nhng yu cu cng nh gii php ra thc thi trn m hnh v trong iu khin t c mt kt qu tt. Sau y l tm tt li cch thc hin, gii quyt v gii php cho cc yu cu ra. Tm hiu cc ng dng thc t ca h thng trong thc t (chng 1), tm hiu v nh gi cc gii php khc nhau iu khin mc nc trong bn (chng 1). a ra gii php ca nhm gii quyt vn n nh mc (chng 1, chng 3). Tm hiu v a ra gii php tit kim in nng to u im trong cch thc hin, cch gii quyt ti (chng 3) T gii php a ra tm hiu, tnh ton v thi cng m hnh (chng 2, chng 7). H thng hot ng n nh vi cc thng s k thut nh: tc cn chy, mc nc cn n nh, cc thng s hot ng an ton. C 3 ch : Mannual: ch hot ng bng tay (chng 6) Auto: ch hot ng t ng. Gim st v iu khin t xa qua man LAN (chng 8). Trong qu trnh hot ng ca bin tn ta c th can thip ti cc thng s, cc hot ng c th ca bin tn bng PLC, c, gi, ci t cc thng s bng PLC (chng 4 v chng 8). Gii quyt cc vn s c ca h thng: Ngun in ngn hn: s dng chc nng khi ng bm v chc nng t khi ng li, gii hn s ln khi ng li trong s c mt in lin tc (Chng 5) S c ng ng, ngun cp nc, trn bn: nhm tm hiu cch khc phc s c trn bng cch ci trong bin tn nhng MM420 khng h tr chc nng gim st momen nn nhm a ra gii php ny i vi bin tn khc c h tr nh MM430 (Chng 6) thay th gii php trn nhm ua ra gii php nh sau khc phc s c: S dng phao in bn di x l s c ngun cp nc. S dng phao in bn trn x l s c trn bn. S dng chc nng khi ng bm, van 1 chiu, khp ni trnh s c x ng ng, kt ng ng, ba nc S c truyn thng: tm hiu cc m li ca truyn thng c th a ra cch khc phc nhanh nht v chnh xc nht (WinCC chng 8). Thit k h thng SCADA thc hin cc chc nng iu khin, gim st v thu thp d liu. H thng SCAD ph hp vi cc mc ch iu khin v gim st, thu thp d liu v to mt Database c th truy cp cc trng thi trc ca h thng (chng 8).Trong h SCADA c th gim st cc thng s hot ng nh: in p, dng in, mc nc, in nng tiu th.. Bng vic thit lp mt Database cho h thng th cc hot ng, cc trng thi ca h thng c lu tr t ng, t Database ny c th lp cc bo co, thng k tnh ton theo tun theo thng.

10.2. Nhng kh khn gp phiV y l m hnh mang tnh cht thc t rt cao nn trong qu trnh thc hin nhm cn tm hiu mt s h thng thc t, trong qu trnh tm hiu rt kh c th c ti liu v mt h thng thc t.Cc thit b s dng trong m hnh l cc thit b cng nghip, v m hnh nh nn vic tm kim cc thit b cng gp nhiu kh khn.V chng em cng t c tip sc vi cc h thng thc t nn cn rt thiu v kinh ngim, hiu bit nn vic tip cn vn , gii quyt vn , thc hin vn cn rt nhiu thiu st, v rt cn s gip , ch bo ca thy (c).10.3. Hn ch tiV chng em cha c nhiu kinh nghim trong vic thc hin mt m hnh thc t nn trong n cn nhiu im hn ch, cha thc s tt. Khu hiu chnh thng s PI cn cha c nhiu kinh nghim nn h thng vn dao ng v vt l cao. V mt s vn m cha m rng thm ng dng trong m hnh.10.4. Hng pht trin tiNh phn tch trn th h thng c tnh ng dng trong thc t rt cao, v vy vic pht trin ti rt a dng. Mun p dng trong thc t th ch cn tnh ton cc thit b ph hp vi cc yu cu thc t.S dng mng truyn thng USS hoc cao cp hn l Profibus c th thit lp mt h thng trong thc t vi quy m ln.Vic kt ni PLC v bin tn th c th khai thc ti a cc chc nng ca bin tn ph hp vi h thng thc t ang hoat ng.Pht trin iu khin v gim st qua mng Internet, gi thng bo khi c s c qua tin nhn, gi bo co hng ngy qua Email.

TI LIU THAM KHO

Ting anh:[01] Siemens Manual PLC S7 300 SIEMENS[02] Siemens WinCC V 7.0 SIEMENS[03] Siemens MM420 manual SIEMENS[04] Wed Navigation SIEMENS[05] Application ATV61[06] WinCC V6-VBS SIEMENS[07] USS Protocol SIEMENS[08] USS Protocol- S7-200 SIEMENSTing vit[09] Hng dn s dng MM420 ting vit (cha r tc gi)[10] Hng dn s dng WinCC (cha r tc gi)[11] Hng dn s dng Step7 Microwin (cha r tc gi)[12] iu khin hin i (cha r tc gi)[13] Tit kim nng lng bm qut (cha r tc gi)[14] Bin tn 2012 (cha r tc gi)

Web:PLC-SCADA.COM.VNPlcvietnam.comWebdien.comTailieu.vn

PH LC

I. PLC S7-200, CPU 224XP.(nh km)II. CU TO V NGUYN L HOT NG CHUNG CA BIN TN()III. SCADA V PHN MM WINCC..(nh km)IV. PHN MM STEP7 MICROWIN...(nh km)V. PHN MM PC ACCESS(nh km)VI. CHNG TRNH STEP7(nh km)

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