View
36
Download
2
Category
Preview:
Citation preview
EVTAtech Group1
Hc nhanhLabVIEW
EVTAtech Group
Website: http://dieukhientudong.com
Contact: hieutq
2Lp trnh ha dnh choo lng, iu khin vkim tra.
Pht trin ng dng mt cchnhanh chng vi nhng VI thnthin v s dng mi trng ho n gin
Thit k o lng v iu khinvi giao din DAQ cho qu trnhkt ni vi tt c cc kiu d liuvo/ra.
M rng vi cc ng dng thigian thc (Real-Time) cho FPGA v PDA.
Ti liu hng dn, tr gip vinhiu ngn ng khc nhau.
Ti liu TV EVTAtech ang vit.
3 Cun sch c tn Electronic Design - mt pht minh lnca LabVIEW ng v tr Top 50 mc quan trng cangnh cng nghip in.
LabVIEW 6.1 nhn c nhiu gii thng t ngho xut sc vo nm 2002.
Gii thng thit k mi vi b LabVIEW 6i mt cngc mang li hiu sut cao nht cho ngnh cng nghipin nm 2000
LabVIEW 6i c la chn l Best of the Best trongdanh sch phn mm c nh gi bi nhng ngitrong ngnh
LabVIEW mt ng dng hu ch
4T5 - 2003
T1 - 2002
T4 - 2000
T3 - 1998
T2 - 1996
T8 - 1993
T9 - 1992
T1 - 1990
T10 - 1986
T4 - 1983
LabVIEW 7 Express VIs, I/O Assistants, FPGA/PDA targets
LabVIEW 6.1 C kh nng hot ng mng networ, phn tch
LabVIEW 6i o lng thng minh, kt ni
LabVIEW 5.0 ActiveX, chuyn xu
LabVIEW 4.0 Nhiu cng c chuyn nghip, g ri hon thin
LabVIEW 3.0 l phin bn nn tng ca LabView
LabVIEW cho Windows
LabVIEW 2.0 cho Macintosh
LabVIEW 1.0 cho Macintosh
LabVIEW project begins bt u d n
NI LabVIEW: Lch s qu trnh tng trng
5Phn mm nhng vo Labview Wolfram Research Mathematica Microsoft Excel MathWorks MATLAB v Simulink MathSoft MathCAD Electronic Workbench MultiSim Texas Instruments Code Composer
Studio Ansoft RF circuit design software Microsoft Access Microsoft SQL Server Oracle
Sn phn cng ngh mang tnh thng miCc giao thc truyn
thng Ethernet CAN DeviceNet USB IEEE 1394 RS-232 GPIB RS-485
6PC, Mac, Linux, Sun
LabVIEW ng dng mi ni
Networked I/O
PC Boards
Workstation
Handheld
Embedded(FPGA)
Industrial Computer (PXI)
Wireless
Sensor
Tektronix Open Windows Oscilloscopes
7H LabVIEW
NI LabVIEWPhn mm lp trnh ha dnh cho o lng v iu khin
LabVIEW Real-Time Module LabVIEW FPGA Module LabVIEW PDA Module LabVIEW Datalogging andSupervisory Control Module
8Ci c c, phn tch v hu hiuLabVIEW l mt ngn ng lp trnh ho kh mnhtrong cc lnh vc kim tra, o lng, v iu khin. Cth thy d trong 3 im ni bt sau: ci c c, phntch v s hu hiu. LabVIEW l mt phn mm thnthin, mt cng c mnh cho phn tch v hu dngtrong lp trnh thi gian thc gii thc.
9Ci c c LabVIEWLabVIEW c th c s dngdnh cho nhiu thit b: GPIB, Serial, Ethernet, VXI, PXI
Instruments Data Acquisition (DAQ) PCI eXtensions for Instrumentation
(PXI) Image Acquisition (IMAQ) Motion Control Real-Time (RT) PXI PLC (through OPC Server) PDA Modular Instruments
LabVIEW c kthp cht ch viphn cng, thmvo hng ngn ktni vi cc thit bvo/ra vi hngtrm thit b khcnhau.
10
Phn tch LabVIEWLabVIEW bao gm nhiu cc cng ctr gip ngi dng phn tch dliu: Hn 400 mu hm phn tch o lng
trong cc biu thc khc, ti u, lc, ton hc, chui s hc, thng k, v.v...
12 VI Express mi c bit c thitk dnh cho phn tch o lng, baogm b lc v phn tch quan ph.
Cc VI x l tn hiu dnh cho Filtering, Windowing, Transforms, Peak Detection, Harmonic Analysis, Spectrum Analysis, v.v.
H thng phn tcho lng mnhc xy dng trnmi trng phttrin Labview.
11
S hu hiu LabVIEWLabVIEW includes the following tools to help you present your data: On your machine Graphs, Charts,
Tables, Gauges, Meters, Tanks, 3D Controls, Picture Control, 3D Graphs (Windows Only), Report Generation (Windows Only)
Over the Internet Web Publishing Tools, Datasocket (Windows Only), TCP/IP, VI Server, Remote Panels, Email
Enterprise Connectivity Toolset SQL Tools (Databases), Internet Tools (FTP, Telnet, HTML)
LabVIEW c th lmvic trn PC ca bnhoc ngay c trn mngnetwork, hoc bn cth thm vo nhngng dng l 1 li thging nh DIAdem.
12
Cc bi s gii thiu v Labview cun ny
Gii thiuLabVIEW
Vng lp
Lp trnhModular
Tu binVI
Thu thp d liuv dng sng
Cng ciu khin
Mng
Plotting Data
Clusters
Decision Making in a VI
Chui v file vo/ra
13
iu t c ca kho hc
Hiu c Front panels, biu thnh lp cc khi thnh mt hthng, v cc thit b kt ni.
Bit s dng cu trc cc chng trnh v cc dng d liu mchng tn ti LabVIEW
Bit s dng linh hot cch sp xp d liu cho vic lp trnh mytnh v k thut xc nh, sa cc li trong mt chng trnh.
To ra v lu tr cc VI ca bn v vy bn c th dng chng nhnhng VI ph tr.
Hin th v lu tr d liu ca bn. To ra nhng ng dng s dng nhng bng plug-in data
acquisition (DAQ) To ra cc ng dng m s dng GPIB v chui cc thit b cng.
Kho hc ny chun b cho bn:
14
Kho hc c th mang li.
Xy dng VI trong LabVIEW, chc nng, hoc th vin VI
Thuyt tng t v cng ngh. Hot ng chi tit ca chui cng hoc bus
GPIB Lm th no pht trin mt cng c iu
khin.
Mc ch ca kho hc khng phi l bnlun v nhng vn nh l:
15
Bi hc 1: Gii thiu v LabVIEW
Ch nghin cuMi trng LabVIEWGiao din LabviewBiu thit lp cc khi thnh mt h thngLp trnhTr gip trong LabVIEWG ri 1 VI
16
Virtual Instruments (VIs) Nhng cng c oGiao din chnh Controls = Inputs (Vo) Indicators = Outputs (Ra)
Biu khi Cc khi chng trnh
ca giao din chnh Cc thnh phn i dy.
17
Hp thoi khi ng LabVIEV
18
To mt VI mi FileNew VI to 1 VI mi
FileNew m mt hp thoi mi v cu hnh chomt VI, t cc bin s, iu khin, v.v
19
M cc mu c sn
20
Menu
File Edit Operate Tools Browse Window Help
Di chuyn v click n thc n trn Menu la chn theo cc yu cu ca bn
21
Giao din pha trcThanh cng
c
Ch thch th
Nt iukhin
thdng sng
Biu tng
Ch thchPlot
Ch thchScale
Nhn th sng
22
th khi
i dy
th
MtSubVI
Cu trc vnglp While
Cc cngC Hm chia
Hng s Hm thi gian(Kiu delay)
Nt iu khin dngBoolean
23
Cc thanh cng c v biu khi
Chy ng dngChy ng dng lin tcNgng chyTm dng/Tip tc
Hin th qu trnh thi hnh Nt Step Into Nt Step Over Nt Step Out
Ch dn
Chp nhn
Chy t qung
Font ringAlignment ringDistribution ringResize ringReorder ringTr gip ng cnhNhng nt c thm vo
trn thanh cng c
24
Bng cng c LabVIEW t ng chn nhng cng c cn thit. Hin th trn Front panel v trn biu thit lp
h thng. Cc chc nng cng c c th la chn ch c bit theo con tr chut.
S dng cc cng c to v chnh sa giaodn chnh v cc i tng ca biu khi
Hin th bng cng c (Tools Palette), chnWindowShow Tools Palette
25
Giao din chnh - Bng iu khin(Controls Palette)
Controls PaletteBao gm hu ht cc hm ph bit nht c
s dng iu khin
Bng ControlsHin th cc chc nng iu khin
26
Biu khi Bng cc hm(Functions Palette)
Functions PaletteBao gm cc VI (Cc VI tng tc vi trangcu hnh) v hu ht cc thnh phn ph binca cc hm.
Bng Functions Hin th tt c cc hm
27
Bng cc cng c
L cc bng dng ho, lun chuyn Bng cp 2 c lun chuyn t bng
chnh S dng bng la chn thay i tng
quan t la chn nhanh sang chuynnghip
Tm kim La chn
Nhp chut vo thnh phn VI cn dng da ti bng cc VI tip theo
Ln bn trn
28
Tm kim mt Controls, VIs, v Functions
Nhp vo nt search vg ch bn mun tm.
Nhp chut v ko thmi thnh phn t ca stm kim ti biu khihoc nhp p chut vothnh phn m
29
Bng Control & Function theo ngi dng
Cc th vin vi.lib bn trong th mc ca LabVIEW Thay th cc thnh phn bn trong user.lib hoc instr.lib
cc Vi c a vo bng Controls v Functions
Vo: Programs National InstrumentsLabVIEW
30
Xy dng mt d n vi nt iu khin controls (a vo) v ch th indicators (u ra)
Gi triu khin
Gi trch th
Nhn
Nt tnggim
iu khinBoolean
Ch thBoolean
To mt giao din VI nho nh
31
Cc Menu tt cho i tng Front Panel
Click chut phi vonhn hin th menu tt
Click chut phi vo khunghin th s truy xut menu tt
32
Trang c tnh
Click chut phi lnmt trnh iukhin hoc ch thtrn Front panel vla chn Properties t menu tt xclp hp thoi ctnh cho i tng.
33
Cc hm ton hci dy
Gi triu khin
Block DiagramFront PanelGi trch th
To mt VI Block Diagram
34
Express VIs, VIs v Functions Express VIs: Cc VI chuyn nghiptng tc vi trang hp thoi
cu hnh Standard VIs: Cc VI tiu chun c tu bin i dy Functions: Nhng thnh phn hot ng ch yu ca LabVIEW
(khng phi Front panel hoc Block diagram)
35
Cc im nt trong Block DiagramIcon Nt m rng Nt m rng
Hm VI c bn VI c 3 ng ra khc nhau Trng mu vng ch nh mt VI tiu
chun Trng mu xang ch ng cho mt VI
Express
36
Block Diagram Terminals
Terminals l cng ra v cngvo trao i thng tin giapanel v diagram
Terminals tng t nh thams v hng s trong ngn nglp trnh c bn.
Click chut phi v chn View As Icon thay i tng quanicon
37
Cc dng dy ni trn Block Diagram
V hng
Kiu Numeric
Kiu Boolean
Kiu String
Mng 2 chiuMng 1 chiu
Kiu Dynamic
38
K thut i dyHot Spot
T ng i dy S dng ca s tr gip Context Help Window
khi i dy Click chut phi ln dy v chn Clean Up Wire (Ctrl+B) Ch cc di Tip T ng l trnh i dy Click chut phi ln Terminals
v la chn Visible ItemsTerminals
View the terminal connections to a function
39
Block diagram thc thi phthuc vo lung d liu thBlock diagram s KHNG thc thi t tri qua phi
Node s thc hin khi dliu sn sng a ti tt cu vo ca terminals.
Node cung cu d liu chott c u ra ca terminals khi lm vic.
Lp trnh lung d liu
40
Tr gip ng cnh hin th ca s tr gip ng cnh ta la chn
HelpShow Context Help, hoc n t hp phm , hoc nhp nt Show Context Help Window trn thanhcng c
Di chuyn con tr ti itng hin th tr gip
Kt ni:Cn thit ch bo ngh ch thngTu - ch m
Tr gip ng cnh thng thng Kho tr gip Tr gip chi tit
41
Tr gip trong LabView Click vo tr gip chi tit trn ca s tr gip ng cnh La chn HelpVI, Function, & How-To Help Click vo Click here for more help trong ca s tr gip
ng cnh.
Ti m t chi tit hu ht cc palettes, menus, tools, VIs, v functions, hng dn tng bc cc lnh c s dngtrong LabVIEW, cc tnh nng, cc lin kt ti hng dn, cc vn bn PDF l sch hng dn LabVIEW, nhng ch, v ti nguyn h tr v cng ngh.
42
Tm kim nhng v d tm kim nhng v d
c sn trong LabVIEW, tala chn HelpFindExamples
Web-tch hp Tm theo t kho, kiu v
d, kiu phn cng, v.v.
43
K thut g riTm li
Nhp nt c biu tng bn. Mt ca s sxut hin hin th cc bng li.
Execution HighlightingClick vo nt Execution Highlighting; Nhng gitr hin th trn cc dy ni.
44
K thut g riProbe thm d
Click chut phi ln dy v la chn probe, ns hin th d liu ca cc on ni dy
Breakpoints im gyClick chut phi v la chn Set Breakpoint; qu trnh thi hnh s dng li im gy.
Conditional Probe Thm d iu kin l s kt hi gia im gy (breakpoint) vthm d (probe). Nhp chut phi ln dy vchn custom probe.
45
K thut g riNhng nt Step Into, Over, and Out thchin g ri tng bc n mt.
Click vo nt Step Into cho php thc hin tngbc n.
Click vo nt Step Over cho php thc hintng bc n hoc nhng im step over.
Click vo nt Step Out cho php thc hin tngim
46
Tm tt Virtual instruments (VIs) c 3 phn chnh - Front panel, Block diagram,
biu tng v ni Front panel l giao din ngi dng ca ngn ng LabVIEW v Block
diagram l m thc thi. Block diagram bao gm m ngun ho ca cc nt, u cui, v
cc ng i dy S dng Express VIs, nhng VIs chun v cc hm trong Block
diagram to m cho ring bn. Phn ln nhu cu chung u sdng Express VIs sn c cc hp thoi cu hnh tng tc to ngdng cho ring mnh.
Floating Palettes: Bng cng c, bng iu khin (ch c khi ca sFront Panel active), v bng hm (ch c khi ca s Block Diagram active)
Tin ch tr gip bao gm ca s tr gip ng cnh v tr gip trongLabVIEW.
47
Tm tt i tng iu khin (u vo) v i tng ch th (u ra) trong ca s Front
panel. S dng Operating tool vn dng cc i tng Panel. S dng Positioning
tool la chn, di chuyn, v nh li c ca i tng panel. S dng Wiring tool kt ni cc i tng trong th.
Cc i tng iu khin u cui cho ng vin dy hn i tng ch th ucui.
Tt c cc i tng Front panel objects u c trang thuc tnh v cc menu tt. i dy l mt k thut cho iu khin lung d liu v a ra kt qu trong ngn
ng LabVIEW. Khi m nt mi tn Run c biu tng b gy iu c ngha l ng dng VI
khng th thc thi Nhng ty chn v cng c g ri khc nhau cho gi tr thit lp nh nhau: thm
d (probe) v im gy (breakpoint), n bo thc thi, v cc bc g ri n.
48
Mo vt Cc phm tt
Gi bng cng c bng cch gi -click chut phi Tng/Gim nhanh s dng kha Chn ToolsOptions thit lp tnh u tin trong
LabVIEW FileVI Properties thuc tnh VI
Windows Sun Linux MacOS Chy file VI Tm i tng M ca s tr gip ng cnh Loi b cc ng i dy li ng ca s lm vic Chuyn i ca s Giao din/M
49
Bi hc 2Lp trnh theo Modul
Cc ch lin quanSubVIsIcon v Connector PaneS dng SubVIsTo mt SubVI t cc phn trong mt VI
50
Th bc trong LabVIEW
SubVI
51
SubVIsFunction Pseudo Codefunction average (in1, in2, out){out = (in1 + in2)/2.0;}
SubVI Block Diagram
Calling Program Pseudo Codemain{average (point1, point2, pointavg)}
Calling VI Block Diagram
52
Icon/Connector
Mt icon miu t gi nh cho VI trong mi block diagram khc nhau
Mt connector a d liu ti v nhnd liu t mt subVI thng qua vnga ra
Icon
Connector
Terminals
Terminals
53
V d mt SubVI mt php tnh c bn Mt VI nm trong mt VI khc c gi l subVI s dng mt VI ging nh mt subVI, ta to mt icon v
connector pane sau xy dng Front panel v Block diagram
54
To Icon Icon: biu tng miu t gi nh ca 1 VI Click chut phi ln icon pane (Panel hoc
Diagram) gc ca s Nn to mt icon en trng
Icon mc nh To mt icon theo ngi lm
55
To Connector
Click chut phi ln icon (Ch trong Front Panel)
56
To Connector tip...Chn im
57
To Connector tip...u ra c mu khp vi kiu d liu m chng lin kt ti.Click vo u ra nhn thy i tng Front panel kthp
58
S dng mt VI ging nhSubVIAll Functions Select a VI
Ko th icon ti Block diagram ch
59
Tr gip v phn loi u cui
Phn loi u vo/ra: Required Li nu khng kt ni Recommended Cnh bo nu khng kt ni Optional Khng c tc dng nu khng kt
ni
60
To SubVI ty chn Khoanh vng mun to mt subVI Chn Edit Create SubVI thy kt qu
61
Tm tt Cc VI c th c s dng ging nh nhng subVI
sau khi bn to icon v connector to Icon s dng Icon Editor Connector c nh bi s la chn ca u cui Np vo subVI s dng ty chn Select a VI trong
bng All Functions hoc ko th icon vo mt diagram mi.
Tr gip trc tuyn cho subVI s dng la chn Show Context Help
M t chc nng i tng S dng tnh nng Create SubVI d dang to nhng
Modul ca Block diagram
62
Bi hc 3Lp li v cc vng lp
CC CH Vng lp WhileVng lp ForTruy xut d liu vng lp trc
63
Vng lp While
Vng lp While trong LabVIEW Lu thut ton Sinh m
Repeat (code);Until Condition met;End;
64
Vng lp While1. Chn While Loop 2. Khoanh vng m mun t trong vng lp
3. Ko th vo vng lp cc nt v sau i dy
65
La chn vng lp iu kinMc inh: Stop nu l True
Lp li u ra iu kin u ra
66
Cu trc Tunnel Cc Tunnel cho d liu i vo v i ra khi cu trc.
Tunnel l mt khi c xut hin trn khung; mu cakhi c lin quan ti kiu d liu c ni ti tunnel.
Khi m mt tunnel a d liu vo vng lp, th vng lp ch thc hinsau khi d liu n.
D liu i ra ngoi ca vnglp sau khi kt thc vng lp.
67
Vng lp For
Vng lp For trong LabVIEW Lu thut ton Sinh m
N=100;i=0;Until i=N:
Repeat (code; i=i+1);End;
68
Vng lp For Nm trong Structures ca Functions M c to trong vng lp Qu trnh lp ph thuc vo thi gian
Count terminal(S u vo)
Hm tr (ms)
69
Hm trWait Until Next ms Multiple
FunctionsTime& Dialog
70
Hm trWait (ms)
FunctionsTime& Dialog palette
Time Delay
FunctionsTime& Dialog palette
71
Chuyn i s Cc s mc nh thng double (8 bytes) hoc long
integer (4 bytes)
LabVIEW chuyn i t ng cc gi tr tng ng Vng lp For tnh u cui lun lun chuyn thnh dng
long integer
72
Chuyn i s LabVIEW la chn tnh trng c th s dng lng
bit. Nu nh lng bit l tng ng th
LabVIEW s la chn phn khng nhdu thay v phn nh du.
la chn phn th hin, click chut phi ln i tng cuiv la chn mc Representation.
Khi m LabVIEW chuyn i nhng im thay i tnumeric thnh integer, n s lm chn v kiu integer gn nht. LabVIEW lm chn ti x.5 dng integer gnnht. V d nh, LabVIEW a 2.5 thnh 2 v 3.5 thnh 4.
73
Truy xut d liu vng lp trc Thanh dch chuyn
N c gi tr bn phi hoc tri ca khung cu trc vng lp Click chut phi vo khung v chn Add Shift Register u ra bn phi s lu tr d liu trong s hon thnh ca
php lp. u ra bn tri s cung cp d liu c lu tr dng
ban u ca bc lp k tip
Trcvng lpbt u
Vng lp I Vng lp II Vng lpcui
Initial Value
Value 1
Value 1
Value 2
Value 2
Value 3
Gi tr 3Gi trban u
74
Thm vo thnh phn ca Shift Register
Latest valueis passed toright terminal
Click chutphi ln vnglp bn trikhung thamvo i tng
Previous values are available at the left terminals Click chut phi
ln pha bnphi khung thm vo mtshift register
1 loop ago2 loops ago3 loops ago
75
Nt phn hi
S xut hin t ng trong vng lp For hocWhile nu nh bn i dy u ra ca mtsubVI, function, hoc group ca subVI vfunctions ti u vo ca VI tng ng, function, hoc group.
D liu lu tr khi m hon tt mt vng lp, gi d liu ti vng lp k tip v truyn imi kiu d liu.
76
Nt phn hi
i dy t u ra ti uvo c t ng to ramt nt phn hi
t mt nt phn hi tbngFunctionsStructures
77
Khi chy Shift Registers & nt phn hi
Mt ln chy Dng VI Chy li
u ra = 5u ra = 5
u ra = 5 u ra = 5
78
Khng chy Shift Registers & Nt phn hi
Mt ln chy Dng VI Chy li
u ra = 8u ra = 4
u ra = 4 u ra = 8
79
Tm tt C 2 cu trc vng lp chnh: Vng lp While v vng lp
For. To tr hay thi gian cho vng lp s dng hm Wait Until
Next ms Multiple, hm Wait (ms), hoc Time Delay Express VI.
u vo vng lp l mt dng s hc no th u ra s lmt dng s hc .
Feedback nodes v shift registers s truyn gi tr d liut mt vng lp trc ti vng lp k tip
Ch s dng shift registers khi m c nhiu php lp cnc s dng.
80
Bi hc 4Mng - Arrays
CC CH Gii thiu v mng - ArraysT ng ch th mngArray FunctionsNhiu mng kt hp
81
Tp hp cc thnh phn d liu l cc dng tng ng Mt hoc nhiu chiu, nhiu hn 2 thnh phn cho mi chiu Truy xut cc thnh phn bi ch mc ca chng; thnh phn ban u c gi tr ch mc l 0
31
Ch mc10 mng thnh phn
1.2 3.2 8.2 8.0 4.8 5.1 6.0 1.0 2.5 1.70 1 2 3 4 5 6 7 8 9
Mng 2 chiu (2D)
Mng c 5 dng, 7 ct c 35 thnh phn
0 1 2 3 4 5 60 1 2 34
Mng - Arrays
82
Add Dimensioncho mng 2D
1. Chn Array t bng Controls 2. t i tng d liu bn trong shell
Mng iu khin v ch th
83
1. Chn Array Constant t bngcon ca mngArray
2. t i tng d liu vo trong ctmng
To mng hng s
84
Vng lp c th gmnhiu mng t ng chth vi ng bin cachng
Vng lp For t ng chth mc nh
Vng lp While a ra cgi tr kt thc mc nh.
Click chut phi lntunnel ( mu vng nhtrn khung) venable/disable auto-indexing
T ng ch th - Auto-Index
ng dy tr thnh m hn
ng dy mnh hn
Khng cho php Auto-Indexing
Cho php Auto-Indexing
Ch c 1 gi tr ( vng lpcu) ti vng lp u ra
1D Array0 1 2 3 4 5
85
Vng lp bn trong c to ra l cc ct Cc ngn xp ca vng lp ngoi s c dy vo dng
To mng 2 chiu - 2D Arrays
1D Array
0 1 2 3 4 5
2D Array
86
u vo Auto-Index Mt mng u
vo c th cs dng thitlp vng lp For
S thnh phntrong mngtng ngvi b m uvo
Mi tn nt Run khngb gy.
87
C ca mng
Mng khi chy
Cc hm mng ph bin
88
Tp hp mng
Cc hm mng ph bin
89
Xy dng hm mng
Xy dng mt mng nhiu chiu hn
u vo ni tip nhau
a thm thnh phn d liu
Mc nh
90
Hm Index Array
Trch 1 thnh phn
Trch thnh phn ca dng
Trch 1 dng
91
Nhng hm u vo c th c kiu khc nhauCc hm s hc ca tt c phin bn LabVIEW u c nhiu dng khc
V hng + V hng
Mng + v hng
Kt hp Kt quV hng
Mng
Mng
Mng + mng
Mng + mng
Mng
Cc dng khc
92
Nhng thnh phn d liu trong nhm mng u c kiu tngng. Bn c th xy dng nhiu mng: numeric, Boolean, path, string, waveform, v kiu d liu cluster.
Mng ch th c s l 0, c ngha l n c di t 0 ti n 1, trong n l mt s trong mng.
to 1 mng iu khin hoc ch th, ta la chn mt mng bng sau: ControlsArray & Cluster, thay th n trong Front panel, v ko th i tng iu khin hoc ch th vo cu trcmng.
Nu bn i dy mt mng u vo cho vng lp For hoc While, bn c th c v quy trnh cho cc thnh phn trong mng bngcch enable auto-indexing.
Mc nh ban u, LabVIEW l enable auto-indexing trong vng lpFor v disable auto-indexing trong vng lp While.
Cc dng khc tu thuc vo d liu u vo ca cu trc d liu.
Tm tt
Recommended