Download Previous Project Report - Spring 2009

FLORIDAGULFCOASTUNIVERSITY
GPIBDevices
UserManualonUsage&CreationofGPIBCapable
VirtualInstrumentsUsingNILabView
Olexiy Kovtunenko, Robert Porter 4/22/2009 Authors: Olexiy Kovtunenko & Robert Porter Section 0: Introduction About: This manual will describe how to use GPIB devices as well as provide instructions on how to construct simple GPIB communication virtual instrument using NI LabView. Purpose: The purpose of this manual is to instruct the user, on how to use GBIP Multi Device Virtual Instrument created for Data Acquisition & Control Systems course that was taught by Dr. Zalewski in spring 2009 semester. As well as instruct user on how to connect GPIB devices to the host PC and to each other. In addition, this manual will describe how to develop a simple Virtual Instrument that is able to communicate with GPIB device and display the output. Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter Section 1: Hardware D
Description &
& Configuratio
on Host PC: The h
host PC is the main controlller of the sysstem Hardw
ware: Dell PC, Intel Core 2 D
Duo E8500, 33.25 Gb of RAM NI GPIB PCI Ca
N
ard: Main com
mmunication link in betweeen host PC an
nd GPIB devicces provides 1 GPIB communication port sshown in Figu
ure 1.1 Figure 1.1 PCI GPIB card withh communicattion interfacee Detailed Specifications: Compatibility IIEEE 488.1, 48
88.2 GPIB Transfer Rate 1.5 MB//s OS Support Wi
O
indows® 2000
0/XP Liibrary Supporrt Visual C++®
®, Borland C++
+ Builder®, LaabWindows/C
CVI, Visual Basic®, Delphi®, LabV
VIEW Max. GPIB Con
M
nnections 15 Bus Type PCI‐1
1671UP: Universal PCI V2.2
2 I//O Connectors 1 x IEEE 488
8 standard 24
4‐pin Dimensions (L x H) 119.91 xx 64.41mm (LLow profile M D1) Po
ower Consum
mption Typicaal: 5 VDC @ 37
75 mA Operating Tem
O
mperature 0 ~
~ 60° C (32 ~ 1
158° F) @ 0‐990% RH Sttoring Tempe
erature ‐40 ~ 100° C (‐40 ~ 212° F) @ 5‐ 90% RH Operating Hum
O
midity 0 ~ 90%
% RH, non‐condensing Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter HP 34401A Mu
ultimeter (Figgure 1.2): Figure 1.2 HP 34
4401A Multim
meter Measure up to
M
o 1000 volts w
with 6 1/2 digits ressolution dc accuracy off 0.0015% acc accuracy of 0.06% 3Hz to 300kHzz ac bandwidtth 10
000 readings//sec. direct to
o HP‐IBM HP 53131A Un
niversal Counter (Figure 1..3): Figure 1.3 HP 53
3131A Univerrsal Counter
22
25 MHz band
dwidth (o
optional 1.5, 3
3, 5, or 12.4 G
GHz) 10
0‐ or 12‐digit resolution w
with 1ss gate time HP‐IB interface
e standard Data transfer rrate of up to 2
200 fully form
matted measuurements/secc Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter Co
onfiguring & Connecting D
Devices: 1. Connect GPIB devices to the GPIB caapable worksttation: a. Usse IEEE standaard approved
d GPIB cables to connect th
he devices: i. Connecct male part o
of the cable too the GPIB caapable worksttation ii. Connecct other side o
of the cable tto the GPIB deevice iii. Connecct new cable iin the femalee GPIB connecction on the ffirst device iv. Connecct remaining e
end to the seecond GPIB deevice see Figu
ure 1 v. Secure all screws on
n the connecttion ends Figure 1
1. GPIB Chainn Connection
2. Power up devices and w
workstation: onnect the po
ower cables tto enabled poower outlets
a. Co
b. Po
ower on the d
devices by pusshing respecttive button on
n each devicee separately
c. Po
ower up the w
workstation and login withh provided useername and p
password Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter Section 2: User Manua
al for GPIB du
ual instrumen
nt The objecctive of this se
ection is to sh
how the user how to read data in LabViiew from the device conneected via GPIB interface. The
e procedure iss explained in
n the followinng steps. 1. Locate and
d open the VI: a. Lo
ocate VI in C:\\Documents aand Settings\A
Administrator\Desktop\GPIB\userMod
de.vi or Locate VI in C:\Documentts and Se
ettings\Admin
nistrator\Deskktop\GPIB\addvancedModee.vi i. The use
er operating rregime providdes basic funcctionality of tthe device ii. In advaanced operatiing regime usser is able to ssent detailed command to
o the device, through the provided com
mmand field
ds for HP 344401A can be fo
ound here [1]] iii. Advancced command
iv. Advancced command
ds for HP 531 31A can be fo
ound here [3]] 2. Start the V
VI by clicking aappropriate b
button on thee top of the LaabView windo
ow as shown in figure 2 Figure 2. Initiation of Virtual Instrument
he VI can operrate in three different moddes a. Th
i. Multim
meter Mode (FFigure 3): onlyy communicaation with HP 34401A multim
meter is establlished, comm
munication is iinitialized witth strictly thiss device. The function
ns that are noot included into the native interface of tthis device will not be avvailable Figure 3. Multim
meter mode ii. Counte
er Mode (Figu
ure 4): similarr to multimeteer mode, the counter mod
de will esttablish communication excclusively with HP 53131A u
universal counter. Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter The com
mmands thatt are not nativve for HP 531131A counter will not be availab
ble Figure 4. Counte
er Mode iii. Both (SSimultaneous) Mode (Figurre 6): unlike ffirst two mod
des, the Both mode aallows user to
o communicatte with both HP 34401A and HP 53131A simultaaneously. When user clickss on the “Both” tab, the VII automatically starts ssending comm
mands to bothh devices, as well as startss reading and outputtting the datum received oonto the graph
h. Sample com
mmands inclu
ude:  READ? – prrovides a singgle read of datta, compatible with both devices DC? – makes a single DC voltage read, o
only  MEASure:VOLTage:D
on HP 34401A multimeteer n change the command w hile the program is runnin
ng, by typing iit in You can
the respective text b
box. When yoou start typing a little buttton with the mark will appe
ear on the topp (Figure 5); tthis button m
must be presseed to checkm
make the command
d effective. Figure 5
5. Accept text button Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter Figure 6. Both (Simultaneous) M
Mode 3. Expected rresults: a. If ssteps were fo
ollowed prope
erly, then useer will begin tto see some o
output few seconds after the VI is initiallized and/or ccommand is ttyped ot followed p
properly, thenn user will recceive an errorr message as b. If ssteps were no
shown in Figure
e 7 Error 1
14 means that devices are not found orr were not co
onnected prop
perly. Figure 7. Error M
Message 4. To terminaate the program, press the
e STOP buttonn, shown in FFigure 7 on the top right Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter Section 3: Programmin
ng Simple GP
PIB Communication VI Th
he objective o
of this section
n is to provide general insttructions on w
writing GPIB ccommunication so
oftware in LabView. This section guidess the reader tthrough the p
process of creeating a VI thaat co
onducts multiple reads fro
om the HP 344
401 multimetter. It can be followed in ggeneral, but p
please be aware that specific comm
mands need tto be passed to your particular device. These comm
mands manufacturer’s user manuaal . If I found m
manual like th
arre found in m
his during thee creation of my program, it wo
ould save me a lot of headache. The fol lowing steps describe the developmen
nt process. Enjoyy! 1. Open Labvview, select FFile>New or p
press Ctrl+N ccombination o
of keys. 2. Click on W
Window > Show
w Block Diagrram or press Ctrl+E combination of keyys. 3. To initiate communication with GPIB
B device rightt click on any white space, then click on
n Search 4. Type in GP
PIB into the se
earch box, the
en double clicck on top result GPIB Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter 5. You should
d see the follo
owing pane, sselect GPIB W
Write icon a. No
ote before, an
ny reading can be done froom the GPIB device, you m
must send it aa co
ommand, thatt if why GPIB Write is the ffirst and initiaal step in taking read from the GP
PIB device b. GP
PIB Write has 2 inputs thatt absolutely m
must be preseent (marked p
purple) i. The add
dress of the d
device ii. The com
mmand stringg 6. Create con
nstant string, by right clicking on top puurple input, seelect Create >>> Constant
Note tthe address of the device is displayed bby the device during the initiation or can
n be viewed
d through the
e Measureme
ent & Automaation Explorer, located at TTools >> Measu
urement and Automation EExplorer e device in th
he appeared ppurple text bo
ox (purple wirre should be 7. Fill in the aaddress of the
automatically connecte
ed) ommand strin
ng 8. Create a co
a. Th
his can be don
ne in a similarr way, right cllick on the second purple input, Createe> Co
onstant Note: TThis is sufficie
ent for initiattion commandd. If it is not, I would recom
mmend creatting contro
ol. This will ad
dd the text bo
ox in the Fronnt Panel, and aany dynamic command caan be passed
d to the devicce from that p
point. Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter 9. To initiate continuous rread on the H
HP 34401 multtimeter, we w
will use triggeer, as mention
ned e, string consttant was creatted. Fill in pu
urple text bow
w with TRIG:C
COUN above, for this purpose
5000 TRIG, sstands for triggger, COUN stands for couunt, or amoun
nt of reads to
o perform, maxim
mum value is 5
50000, MIN 0
0 Note: As mentioned
d, this is only valid for HP 334401 Device
e is now readyy to perform read 50000 ttimes. 10
0. Specify wh
hat reading to
o take. To spe
ecify what reaading to take,, we must passs another command to same deviice (please use your speciific user manu
ual to refer to
o the measuring commandss) a. Re
epeat steps 1‐‐8, now for th
he measuringg command, I strongly reco
ommend usin
ng co
ontrol, but if aall you want to measure is Voltage DC, A
AC, or something that willl remain relative
ely constant, tthe string connstant will do . C? In the purpple text box, the device, wiill now start b. Fill in MEASure:VOLTage:DC
reading voltage
e DC. 11. Now we arre ready to re
ead from the GPIB device, repeat steps 1‐6, but now
w select GPIB Read. a. GP
PIB read has 2
2 required inp
put: (1) addreess of the devvice(string), itt can be donee by following step 6
6 and filling in
n the addresss of the device, or by wirin
ng previously
eated constant, to the req
quired input oon the GPIB R
Read icon. (2) The size of th
he cre
read in bytes, ccan be created
d by followingg step 6, but right clicking onto the seccond blu
ue bubble on the left of th
he icon, fill in 32 for long D
Double. 2. Display the
e output 12
Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter a. Rigght click on th
he data (purp
ple bubble on the right han
nd side of thee GPIB read iccon) Create >>Indicaator b. Te
ext indicator w
will appear on
n the Front Paanel 13
3. Loop step 10‐12, for continuous read
d: right click oon any white space, selectt while loop
a. En
nclose items tthat were add
ded in step 100‐12 Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter OP button thaat will appearr on the frontt panel A while loop comess with the STO
Now w
when you starrt VI, the digitts will start apppearing, eveery 150 ms. Authors: O
Olexiy Kovtun
nenko & Robe
ert Porter Section 4: Conclusion It is the baasic VI for com
mmunication between the
e host and GPPIB devices. W
What you can do with GBIB
B, in general, iss much more than that. Yo
ou can have thousands of commands, indicators, and up to 14 deevices chained to
ogether to givve you as many reads as you need/wannt. A more co
omplicated VI developed ffor Data Acqu
uisition & Conntrol class, Spring 09, FGCU
U is shown beellow. The same developmen
nt principles aapply to it, thiis VI is able too communicate with 2 devvices, display numerical as well as grraphical output simultaneo
ously or sepa rately, and co
onduct simulttaneous read/write. Authors: Olexiy Kovtunenko & Robert Porter References: [1] HP 34401A User Manual: http://www.sec.upm.es/docencia/plan_92/im/descarga_IM/ZIPs/HP%2034401A%20Programming%20R
eference.pdf [2] HP 34401A Data Sheet: http://www.jlab.org/~beise/g0‐exp/TargetControls/manuals/ag_34401a_spec.pdf [3] HP 53131A User Manual: http://www.eie.fceia.unr.edu.ar/ftp/Mediciones%20II/53131‐90055.pdf [4] HP 53131A Data Sheet: http://www.airlink.dk/Dokumenter/HP53132A.pdf