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Ti liu hng dn th nghim:
MNG TRUYN THNG CNG NGHIP
1. GII THIU CHUNG
1.1 Mc ch
Gip sinh vin lm quen vi h thng truyn thng cng nghip, c kh nng phn tch vtch hp truyn thng cho mt h thng tng ha cng nghip hin i. Mt s kin thcv k nng chnh cn t c:
Kh nng phn tch cu trc, chc nng v nguyn l hot ng ca h thngtruyn thng cng nghip
Phng php cu hnh v tch hp truyn thng cho cc thit b tryn thng cng
nghip Thit k giao din ngi my v vn hnh h thng qua h thng truyn thng
1.2 Yu cu thc hnh
Sinh vin trc khi n thc hnh phi c v chun b trc theo ti liu hngdn thc hnh trnh by cho cn b hng dn thc hnh. Nu khng t skhng c vo thc hnh.
Khi vo thc hnh tuyt i tun th theo ni qui ca phng v s hng dnca cn b hng dn. Sinh vin phi hon ton chu trch nhim nu gy ra saihng, s c do khng tun th ni qui hng dn thc hnh.
Sinh vin phi np bo co thc hnh cho cn b hng dn chm nht l mttun k t khi kt thc tt c cc bi thc hnh.
Bo co c th vit bng tay hoc in my, trnh by r rng sch s, th hinc ni dung chnh nh theo ti liu hng dn yu cu. Bn photo s khngc chp nhn.
1.3 M t bi thc hnh
Bi tp thc hnh s gip minh ha v trang b cho sinh vin kin thc c bn, thc t mtcch trc quan v h thng truyn thng cng nghip hin i c xy dng vi thit b dotp on Rockwell Automation ti tr. Vi nhng kin thc l thuyt v nguyn l logic hotng mt cch h thng c trang b trn lp, sinh vin c th tip cn v bc u lmquen thc hnh vi nhng nhim v thc t c bn thng gp trn h thng thc. Bi thchnh sc chia lm 2 phn chnh:
Phn 1: Tm hiu v lm quen vi h thng tng ha Rockwell Automation baogm cc khi nim c bn, cng c pht trin v minh ha vi cc v dn gin vcc chun truyn thng nh DeviceNet, ControlNet..
Phn 2: Trn c s nhng kin thc c hc v lm quen, sinh vin s thchnh nhng k nng c bn nh, cu hnh mng, cu hnh d liu v xy dng tchhp ng dng truyn thng cng nghip vi cc chun h tr.
Ni dung thc hnh sc chia thnh 2 bui v sc thc hin trong 90 pht.
Trng HBK H NiKhoa in
B mn iu khin Tng
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2. NI DUNG BI THC HNH
2.1 BI 1: TNG QUAN V H THNG IU KHIN CNG NGHIP
2.1.1 Mc ch thc hnh
Bi thc hnh gip hc vin lm quen vi m hnh mng cng nghip ni chung v h thngmng truyn thng cng nghip ca hng Allen Bradley ni ring. Bi th nghim, gip hcvin bit cch cu hnh v cch s dng cc dch v ca mt vi mng truyn thng tiubiu ang c s dng trong thc tin. T hc vin c c hi tip cn trc quan v mhnh h thng iu khin cng nghip.
2.1.2 M t h thngHnh 1 di y minh ha mt h thng iu khin v gim st tiu biu gm 3 cp:
Cp trng: Cc thit b chp hnh, cc thit bc ni mng vi nhau thng quamng DeviceNet.
Cpiu khin: Gm cc PLC c kt ni vi nhau thng qua mng ControlNet. Cpiu khin v gim st: Gm cc PC, PanelView; cc thit b ny c kt ni
vi nhau v kt ni mng vi cp iu khin thng qua mng EtherNet.
2.1.3 Nhim v th nghim
A. Nhim v chun b nh
Tm hiu cu hnh mng v nguyn tc hot ng ca cc h thng mng:DeviceNet/ ControlNet/ EtherNet da trn ti liu tham kho.
Nu cc c im k thut c bn ca h thng mng EtherNet/ ControlNet/DeviceNet? So snh cc c im ny gia cc h thng mng?
Hnh 1: H thngiu khin cng nghip
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Th no l t cu hnh mng? Ti sao phi t cu hnh mng? Nu phng phpt cu hnh cho mt h thng mng ni chung v ly v d mng EtherNet hocDeviceNet/ ControlNet vi cc thit b ti PTN Rockwell Automation .
Trnh by c ch trao i d liu trong mng EtherNet/ ControlNet/ DeviceNet.
Nhn xt v tnh nng v phm vi ng dng ca EtherNet/ ControlNet/ DeviceNet.
B. Nhim v ti phng thc hnhTm hiu v tr li cc cu hi sau y:
Da vo m hnh h thng iu khin cng nghip trn bn hy xc nh tng thit bc th ti mi cp: Model, cc module truyn thng, module I/O, cc chun giao tip,cable kt ni gia cc thit b ?
Tm hiu kt ni gia cc PC v PCL; gia PLC v cc thit b trong tng cp, vgia cc cp vi nhau? Tm hiu cch u dy ni mng gia cc thit b trong mngv gia cc mng vi nhau.
Tm hiu cc phn mm phc v cho vic kt ni, lp trnh iu khin, iu khin vgim st trn PC: Mc ch s dng, chc nng, nhim v, trong h thng iu khincng nghip. Phn mm RSLinx, RSView32, RSLogix5000, RSLogix Emulate5000,RSNetWorx, Panel Builder32.
Phn 1: S dng phn mm RSLinx t cu hnh mng EtherNet:
Giao din chnh khi khi ng phn mm RSLinx nh hnh di y:
Thit lp giao tip truyn thng EtherNet/IP vi biu khin (PLC)Phn mm RSLinx l phn mm kt ni gia biu khin RSLogix v phn mm
RSLogix 5000. truyn thng vi biu khin, ta phi cu hnh phn mm RSLinx ph
hp vi loi cng truyn thng hin c:
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a chEtherNet(MAC): a chc gn cho mt m un trong h thng:
+ M un ny lun lu gia chEtherNet ca n.
+ Xc nh a chEtherNet ca thit b trn nhn.
+ Dng ca a chEtherNet: xx:xx:xx:xx:xx:xxa chIP: a chn nh cho mt m un truyn thng trn mng Ethernet c th.BOOTP:Cu hnh mt thit b yu cu mt a chIP trn mt mng EtherNet t my chBOOTP.
BOOTP Server:chng trnh phn mm nhn cc yu cu BOOTP t thit b EtherNet vn nh a chIP.
Kt ni thit b EtherNet/IP vi my tnh qua cp Ethernet
Gn a ch IP cho biu khin hay m un truyn thngNu khng c kt ni ni tip vi biu khin
1. Khi ng phn mm Server BOOTP
Start programRockwell softwareBOOTP-DHCP ServerBOOTP-DHCP Server
Hay
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StartProgramRockwell softwareRSLinx toolsBOOTP-DHCP server
Khi bn ng phn mm BOOTP server, bn sc nhc save li nhng thay i.
+ Nu bn mun ghi li a chIP m bn n nh cho thit b, hy save s thay i li.
+ Thit b s lu gia chIP cho d bn c lu li nhng thay i y hay khng.
Nu bn c kt ni ni tip vi biu khin
Phn 2: S dng phn mm RSLogix 5000 cu hnh a ch IP cho biu khin
Cc bc thc hin: Ci t biu khin c s dng a chIP.
- Kt ni biu khin vi my tnh thng qua cp RS-232.
- Khi ng phn mm RSLogix 5000.
- Trong mc Controller Organizer, chn properties phn EtherNet port.
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- Chn tab Port Configuration
- Nhp a chIP
- n Apply
- n OK
Phn 3: S dng phn mm RSNetWorx cu hnh mng DeviceNet khi offline:
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Bc 1: Chun btrc khi thc hin- Bc 2: To mt file cho mng
- Bc 3: Ngt mng
- Bc 4: Cu hnh tng thit b
Thc hin c th cc bc:Bc 1:chun b trc khi thc hinGi thit danh sch cc thit bt vo mng v a chnh bng di y:
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Bc 5: Cu hnh my Scanner- Bc 6: Lu
- Bc 7: Bo co RSNetWorx
- Bc 8: Download cu hnh tmng
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Bc 2:To ra mt file cho mng: Phn mm RSNetWors s lu tr thng tin v cu hnhca mi thit b trn 1 file my tnh: - To mt file cu hnh DeviceNet
- t tn File lu tr cu hnh mng:
Bc 3:Ngt kt ni mng
ci t cu hnh, s dng phn mm RSNetworx xy dng nhng hnh v ha vmng. thc hin iu ny, chng ta hon thnh cc bc sau cho mi thit b:
Bc 4:Cu hnh cho tng thit b:
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Thng thng, mi thit b s c nhng thng s th hin c tnh cho thit b.
cu hnh offline cho thit b, ta thc hin 2 bc: nh r a chca tng thit b
Cu hnh thng s cho thit b
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Bc 5:Cu hnh my ScannerMc ch truyn thng cc thit b trong mng. chng ta ci t danh sch qut cc thitb trong my Scanner. Sau ta nh ngha vng nh cho d liu ca tng thit b.Thc hin
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Upload cu hnh hin ti ca my Scanner
- Xc nh c tnh ca my Scanner
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- Thit lp Alignment Option [Alignment Option m ta la chn p dng cho cu vo v u
ra]
- Gn cho mi thit b [thc hin bng tay] mt vng nh
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Ch : nu ta s dng Automap on Add th ta b qua phn ny v khi mi thit b c
gn mt vng nh.Thc hin gn a chbng tay cho thit b:
- Download cu hnh cho my Scanner
1. Upload v lu Netword fileMt khi bn cu hnh xong h thng, upload ton b h thng v lu file. S ct tr nycu hnh tng thit b trong file offline.
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2. Thc hin mt bo co NSNetWordx.
Ni dung ca bi bo co:- Thit b trong mng.- a chvng nh ca mi thit b trong my Scanner.- Cu hnh mi thit b.
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2.2 BI 2: XY DNG GIAO DIN GIM ST THU THP S LIU
CHO H THNG IU KHIN N GIN
2.2.1 Mc ch th nghimGip hc vin tm hiu cc phn mm, kh nng tch hp v thit k giao din iu
khin v gim st trn PC cho mt h thng iu khin n gin, thng qua vic s dngphn mm RSLogix 5000 v RS Linx.
2.2.2 Nhim v thc hnh
Kt ni RSLogix 5000 vi PLC. S dng phn mm RSLogix 5000 lp trnh cho
PLC ca hng Rockwell, to kt ni gia RSLogix 5000 v PLC ti phng th nghim thng
qua cng Ethernet I/P, s dng RSLinx cu hnh kt ni. (Cch kt ni nh trnh by
bi th nghim s 1).
To mt chng trnh trong RSLogix 5000:
Khi ng RSLogix 5000.
Ta chn File-> New s hin ra ca s New Controller.
Type: Loi PLC cn lp trnh.
Revision: Phin bn phn mm.
Name: Tn ca chng trnh. VD: My_Project_1.
Descripton: M t chng trnh.
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Chassis Type: Loi khung ca PLC.
Slot: V tr ca biu khin trn khung.
Create In: Th mc cha chng trnh.
!!!Lu khit tn:Trong mt chng trnh Logix 5000, c thnh ngha tn cho cc phn tca chng trnh
nh l biu khin, a chd liu (tags), th tc, mun vo ra I/O,Tn chc php cha cc chci, ch
s v gch di, phi mu bng chci hay gch di, tia 40 k tv khng c cc gch di lin tc hay
k tip nhau,
Khai bo xong cc thng s ta n OK, nh vy ta to ra mt chng trnh
My_Project_1 c ui .ADC trong th mc C:\RSLogix 5000\Project.
Cu hnh biu khin: vo Edit -> Controller properties s hin ra ca s di
y, lc du l cc thng tin mc nh ca biu khin ta c th thay i cc thng tin theo
mong mun.
General: cha ng cc thng tin ban u ca biu khin.
Date/Time: cu hnh mi gi v trng thi thi gian ca biu khin.
Serial Port: Cu hnh thng s cc cng ni tip ca biu khin.
System Protocol: Cu hnh cc thc giao tip gia cc cng ni tip
dng DF1 point to point, DF1 Master hay DF1 Slave.
File: xem li cc thng tin ca chng trnh .
To v cu hnh module vo ra I/O: Kick chut phi vo I/O Configuration -> NewModule : ta tm v add cc module vo ra ca PLC bt u l cc module truyn thng , cc
module Digital I/O, Analog I/O, cc module khc v cc module c bit.
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V d: Vi PLC CompactLogix 1769-L32E ta add module truyn thng 1769-SDN/B:
Click vo communication -> chn 1769-SDN/B n OK.
Ta t tn cho module v d: Truyn_thng, phin bn (Revision) ta chn l 2,
Slot 1( v tr ca module trong khung , hay v tr ca module trn PLC).
Chn xong n OK.
Tip tc n OK.
Tip theo ta add cc module DigitalDC Input 1769-IQ32, Digital Output
1769-OB32, Analog Input 1769-
IF4 v Analog Output 1769-OF2.
Lp trnh bng gin thang (Ladder)
Ta vo Tasks-> Main Task->
MainPrograme-> MainRoutine
xut hin ca s sau:
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2.2.3 Chun b thc hnh
a/Kim tra hotng ca b chuyni I/P:Kt ni cc thit b trong m hnh theo ssau:
Hnh 2.1. S kim tra hot ng ca b chuyn i I/P
iu chnh R1 cho p sut t 25 psi trn G1.
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tn hiu ra t b ngun 38-200 mc nh nht (4mA) th p sut trn G2 l 3 psi
ng vi van kh nn m hon ton.
iu chnh tn hiu ra t 38-200 ln mc cao nht (20mA) th p sut trn G2 l 15 psi
tng ng vi van kh nn ng hon ton.
b/ Kim tra hotng ca cm bin p sut
Kt ni cc thit b theo s sau:
Hnh 2.2. S kim tra hot ng ca cm bin p sut
M van V2 v V4.
Kha R2 cha cp kh vo m hnh. Ta iu chnh c c 4 mA trn ng ho
tng ng l 0 psi trn G5.
Sau ta m v iu chnh R2 n khi c p sut 10 psi trn G5, ta iu chnh
c c 20 mA trn ng ho.
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Sau khi ta iu chnh xong th lc tn hiu phn hi t cm bin 420 mA s tng
ng vi di p sut 010 psi.
2.2.4 Thu thp s liu qu trnh iu khin p sut s dng phn mm
RS Logix 5000
a/ Chng trnh (vit di dng gin thang)
Hnh 2.3. Chng trnh nhn dng
b/ Tin hnh thu thp s liu
Kt ni cc thit b theo s sau:
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Hnh 2.4. S th nghim
Khi ng RSlinx kt ni PC vi PLC dng nhn dng.
Khi ng RS logix 5000 to chng trnh iu khin v np chng trnh vo PLC.
To trend v th theo cc bc sau:
Kick vo trend chn New Trend.
t tn d n v chn chu k trch mu.
Chn bin cn v th.
Chn mu hin th bin cn v.
Chnh thng s trc ta .
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Click vo Apply -> OK. Kick vo Run nu mun v th v click vo
Stop nu mun ngng v.
M van V1, V3 v V4.
iu chnh R1 v R2 cho p sut 25 psi trn G1 v 10 psi trn G2.
van kh nn ch kha hon ton.
Sau ta tng dn m van kh nn c 10% mt ln, ng vi mi ln th nghim ta
thu ly th. T mi th thu c ta tnh ton cc tham s v ghi vo bng sau:
m van(%) k T(s)
10
20
100
Trung bnh
Trnh by kt qu th nghim thu c:
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V van kh nn l van tc ng ngc nn trong qu trnh th nghim ta c s
quy i nh sau: mvan = 100% - mvan thc.
V van kh nn l phi tuyn nn khi ta th nghim cc gi tr m van khc
nhau s cho ta cc gi trkv T khc nhau. Chnh v vy, ta s ly gi tr tbk v
tbT thit k biu khin.
3. Ti liu tham kho
[1] Lu Hng Vit: Bi ging Mng truyn thng cng nghip.[2] Hong Minh Sn: "Mng truyn thng cng nghip" NXB Khoa hc k thut 2005.[3] Cc ti liu tham kho t trang web: http://www.rockwellautomation.com/
th nhn dng vi m van:
a) 30%
b) 50%
c) 70%