Yamato DPI-500 User manual

1
DPI-500 Technical Manual
YAMATOCORPORATION YAMATOTECHCORPORATION
P.O. Box 15070 #112-19425 Langley By-Pass
Colorado Springs, CO 80935-5070 Surrey, B.C. V3S 6K1
U.S.A. Canada
Phone [phone], Fax [phone] Phone [phone], Fax [phone]
OM90
4/01
OPERATING AND SETUP INSTRUCTIONS

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DPI-500 Technical Manual
I. Features 3
II. InstallationandWiring 3
III. Configuration 4
IV. Calibration 5
V. DeterminingProperSpanGain 8
VI. RS232Communications 9
AppendixA:SystemandUserKeywordDescriptions 13
Appendix B: Error Codes 14
Appendix C: Specifications 15
Figure 1: CPU Board Layout 3
Figure2:FrontPanel 4
Figure 3: System Keyword Setup Mode Menu 4
Figure 4: User Keyword Setup Mode Menu 5
Figure 5: Connection to PC 9
Figure6: Serial Data Format forContinuous Mode 10
Figure 7: Serial Data Format for Demand Mode 10
Figure8:PrintTicket 11
Figure9:ConnectiontoPrinter 11
Table1:SpanGainTable5:1 9

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DPI-500 Technical Manual
TheDPI-500 is a multipurpose indicator,which is NTEPapproved at5000 divisions. This indica-
tor is housed in stainless steel and meets all NEMA 4X standards. The large 0.75" display is easy
to see from a distance and is capable of showing up to 50,000 divisions. The DPI-500 also sup-
pliesenoughcurrenttodriveeight350Ωloadcells.
Allsystemanduserkeywordparameterscanbechangedthroughthefrontpanel,includingcalibra-
tion.
TheDPI-500hastwoRS-232Ccommunicationmodes:fullduplexandGross/Net/Tare. Placethe
indicatorinfullduplexmodeforcommunicatingwithacomputeroraremotedisplay. Theunitcan
transmitondemandorcontinuously. PlacetheindicatorinGross/Net/Taremodeforconnecting
directlytoaprinter.
AcrudelayoutoftheDPI-500circuitboardisshowninFigure 1. This layoutshowsthe majorcompo-
nents,aswellastheinputandoutputterminalblocks. Theinputsandoutputsconsistofaloadcell
terminal(J8),DCpowersupplyterminal(J1),andaserialcommunicationsterminal(J3).
Figure 1: CPU Board Layout
E+ S+ E- S- SH P+ P- TXD RXD GND +5
J4
J6 JP2
J8 J1 J3
CPU
EPROM
Installation and Wiring

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DPI-500 Technical Manual
To Place the Indicator in System Keyword Setup
Mode
1)Removethebackcoverfromtheindicator.
2)Placetheshuntblockacross both pins of JP2.
3)Apply powertotheindicator. Thedisplaywillshow
keyword"F1" whichindicatesthat theunitisin the
SystemKeywordSetupMode. Figure 2 shows the
functionsforeachofthefrontpanelkeysinthis
mode.
Figure 3 is a map of the setup menu.
To Place the Indicator in User Keyword Setup Mode
1)Turntheunitoff.(DonotplacetheshuntblockacrossbothpinsofJP2)
2)Whileholdingdownthelb/kgkey,turnthepowerbackon.
SET
Figure 2: Front Panel
F1
Grads. F2
Span Gain F3 Zero Band F4 Zero Range F5
Mot. Band F6
Dig.Filter F7
Ovld.Limit F8
Calib.Unit
F9
Disp.Div. F10
Dec.Pt. F16
Zero Cal. F17
SpanCal. F18 Cal. View F19 Key Zero F19 Key span
500 1000 1500 2000 2500 3000 4000 5000 6000 8000 10000 12000 20000 30000 40000 50000
25 50 75 100 150 200
0d 0.5d 1d 3d 5d
100% 1.9%
1d 3d 5d 10d
1 2 4 8
0d 2% 1d 9d
lb kg
12 5
0 0.0 0.00 0.000 0.0000 00
PressZERO
keytobegin PressZERO
keytobegin PressZERO
keytobegin PressZERO keytobegin PressZERO
keytobegin
Figure 3: System Keyword Setup Mode Menu

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DPI-500 Technical Manual
3)Thedisplay will show"A1"toindicate that theunitisinUser Keyword SetupMode. Thefront
panel keys work exactly as in the System Keyword SetupMode. See Figure 4 for a mapof this
setupmenu.
3)Thedisplaywillmomentarilyshow"CAL0"followed byavalue. This valueisthezerocalibration
value andshouldbe recorded. Press anykeytocontinue.
4) Thedisplay willmomentarily show"CAL 1"followed bya value. This valueis the spancalibra-
tion value. Press any key to returnto keyword F18.
To Key-in the Zero Calibration Value
Pleasenotethatthisprocedureisintendedforemergencyuse,onlyinthecaseofnonvolatile
memoryloss. Aproperzerovalue,obtainedfromasuccessfulzerocalibrationprocedure,mustbe
used.
1) While in the System Keyword Setup Mode scroll to keyword F19.
2)AtkeywordF19, scrolldownonceusingtheZEROkey.
3)Thedisplaywillmomentarilyshow"CAL0",followedbyaflashingzero. Usethefrontkeypad
directional keys,as shown in Figure 2 onpage4,tochange the displayed value to the proper
zerocalibrationvalue.
4)Aftersettingthevalue,presstheNET/GROSSkeytosavethevalue.
5)Thedisplaywillmomentarilyshow"ECAL0"andthenreturntokeywordF19.
To Key-in the Span Calibration Value
Pleasenotethatthisprocedureisintendedforemergencyuse,onlyinthecaseofnonvolatile
memoryloss. Aproperspanvalue,obtainedfromasuccessfulspancalibrationprocedure,must
beused.
1) While in the System Keyword Setup Mode, scroll to keyword F20.
2)AtkeywordF19, scrolldownonceusingtheZEROkey.
3)Thedisplaywillmomentarilyshow"CAL1",followedbyaflashingzero. Usethefrontkeypad
directional keys,as shown in Figure 2 onpage4,tochange the displayed value to the proper
spancalibrationvalue.
4)Aftersettingthevalue,presstheNET/GROSSkeytosavethevalue.
5)Iftheenteredvalueisgreaterthanzero,thedisplaywillmomentarilyshow"ECAL1"andthen
returntokeywordF19. Ifazerovalueisentered,thenthedisplaywillmomentarilyshow"Err5"
andthenreverttothedisplayinstep3ofthis procedure.

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DPI-500 Technical Manual
To Return to Weighing Mode
1)Turntheindicatoroff. IftheunitwasintheSystemKeywordSetupMode,removetheshuntfrom
both pins of JP2.
2)Turntheindicatoron.
TheDPI-500iscalibratedthroughSystem Keywords F16and F17. Each keyword will save a
valueintothenonvolatilememoryoftheindicator. F16setsthezero(deadload)valueandF17
setsthespan(fullscale)value. Afterthetwokeywordsaresetsuccessfully,theuserneedsto
recordbothcalibrationvalues,whichcanbeviewedatkeywordF18.
Intherareeventthatthecalibrationvaluesarelost,theusercaninputthesecalibrationvaluesat
keywordsF19and F20. This eliminatestheuseofusing test weightstorecalibratetheweighing
system.
To Set the Zero Point:
1)Ifthe DPI-500isnotin theSystemKeywordSetup Mode,enteritfollowing theprocedureon the
top of page 4.
2) Once in this mode, scroll to keyword F16 (please refer to Figure 3 on page 4).
3)At F16,scrolldownonce,usingtheZEROkey. Thedisplaywillmomentarilyshow"C 0"fol-
lowedbyavalue. ThisvalueistheinternalA/Dcount.
A1
Baud Rate
1200 2400 4800 9600
A2 Data
Bits, Parity A3 Trans.
Mode A4 Display
Check A5Enable
lb/kg Key
A6 Serial
PortMode A7IDNo. Enable A8IDNo.
Entry A9 No. of
Line Feeds
8n 7O 7E C d 0 1
0 1 0 1 PressZERO
keytobegin PressZERO
keytobegin
PressZERO
keytobegin
Figure 4: User Keyword Setup Mode Menu
Calibration

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DPI-500 Technical Manual
4)MakesurethatthereisnoloadontheplatformandthenpresstheZERO keytozerothevalue.
5)Press theNET/GROSSkeytosave thezeropointvalueintomemory.
6)Thedisplaywillshow"EndC0"momentarily,thenreturnto "F16". NowscrolltokeywordF17
tocompletethespancalibration.
To Calibrate the Span
1) While in the SystemKeyword Setup Mode, scroll to keyword F17.
2)AtkeywordF17,scrolldownonce,usingtheZEROkey. Thedisplaywillmomentarilyshow"C
1"followed byavaluewithone flashingdigit. Thisvaluewillbezerowiththedecimalpointset
tothevaluesetinkeywordF10. Placetestweightsontheplatformequallingfullscalecapacity.
3)Usethe keypad (see Figure 2 onpage4)toadjust thedisplayedvaluetothe test weightvalue.
Increasetheflashing digitbypressingthe lb/kg key. Decreasetheflashing digitbypressing
theZERO key. The positionof the flashingdigit is changedby either the PRINT keyorthe
TAREkey.
4)After thevalueisset,presstheNET/GROSS keytosavethevalue.
5)Iftheprocedurewasasuccess,thedisplaywillshow"EndC1"momentarily,andthenrevertto
"F17". Pleaserecordthe calibration value atthistimeforfuture use.
6)Ifthecalibrationwasnotsuccessful,anerrormessagewillappearonthedisplay. Takethe
shownactiontocorrecttheerrorandthenrecalibratethesystem.
"Err0"-Thecalibrationtestweightortheadjustedkeyed-inweightislargerthanthe
fullcapacityofthescale. Changethetestweightorchecktheinputdata.
"Err1"-Thecalibrationtestweightortheadjustedkeyed-inweightissmallerthan
1%ofthefullcapacityofthescale. Changethetestweightorinputdata.
"Err2"-Theinternalresolutionofthescaleisnothighenoughtoacceptthecalibra-
tionvalue. Select alargerparameterforthespangain.
To Record the Calibration Values through the F18 Keyword
Pleasenotethatthevaluesdisplayedfromthiskeywordareonlyvalidafterasuccessfulcalibra-
tionhasbeenperformed.
1)While intheSystemKeywordSetupMode,scrollto keywordF18.
2)AtkeywordF18,scrolldownonce,usingthe ZERO keytoentertheViewCalibrationmenu.

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DPI-500 Technical Manual
Determining Proper Span Gain
The span gain parameter, accessed from keyword F2 in the System Keyword Setup Mode, is
directlyrelatedtotheanalogtodigitalintegrationtime. Therefore,thelowerthespangainnumber,
thehigherthe measurementspersecond. Disregardingthe digitalfilterlength,a spangainof25
produces about 25 to 30 measurements per second, while a span gain of 200 produces only 3 or 4
measurementspersecond.
Therearetwostepsfordeterminingthespangainvaluetouseinthe SetupMenuforF2. Thefirst
involveslookingupavalueinthetablebelow,savingthatvalue,andthencalibratingthesystem.
Ifthefirststepdoesnotyieldasuccessfulcalibration,thenthesecondstepallowsthetechnicianto
viewtheinternalcountstodeterminetheproperspangainvalueandtocheckforlinearity.
To Determine the Initial Span Gain Value
1)Determinethenumberofdesiredexternalgraduationsandchoosethecorrespondingvalue
underthenumberclosesttoyourfullscaleinputrangeinmV.
2)EntertheSystemKeyword Setup Mode, andsavethisnumberatkeyword F2.
3)Performthecalibrationprocedure. Ifthecalibrationisunsuccessful,oryouwishtoviewthe
internalcounts,completethenextprocedure.
To View the Internal Counts
1)EnterkeywordF16andperform thefirstthreesteps ofthezerocalibrationshownonpage 5.
DONOTSAVE THEZEROPOINTVALUE!
2)Afterpressingzerotozeroanyoffset,placethetestweightontheplatform.
3)Thedisplayedcountistheinternalcount. Atfullscalecapacity,theinternalcountshouldbea
minimumof2 times thedesiredexternalgraduations. Formaximum stability, aratioof5:1or
greateris recommended.
4)Iftheinternalcountishighenough,removethetestweight,re-zerotheindicator,andcontinueon
withcalibration. Iftheinternalcountisnothighenough,increasethespangaintothenexthighest
choiceandrecalibrate.

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DPI-500 Technical Manual
# of External Full Scale Input Range (mV/V)
Graduations 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
500 25 25 25 25 25 25 25 25
1000 50 25 25 25 25 25 25 25
1500 50 25 25 25 25 25 25 25
2000 75 50 25 25 25 25 25 25
2500 100 50 50 25 25 25 25 25
3000 100 50 50 25 25 25 25 25
4000 150 75 50 50 25 25 25 25
5000 200 100 75 50 50 50 25 25
6000 200 100 75 50 50 50 50 25
8000 - 150 100 75 50 50 50 50
10000 - 200 150 100 75 75 50 50
12000 - 200 150 100 75 75 75 50
20000 - - - 200 150 150 100 100
30000 ----200200150150
Table 1: Span Gain Table 5:1
TheDPI-500cancommunicatewithaprinter,computer,orremotedisplayviaafullduplex,ACSII
compatibleRS-232terminal. There are twomodesofoperation, which canbechangedvia user
keywordA6:FullDuplexModeandGross/Net/TarePrintMode.
Full Duplex Mode
TheFullDuplexModeprovidesbothContinuous
andDemandserialtransmission. TheContinu-
ousModeisused to interfacecomputers,
scoreboards,and otherremotedevicesrequir-
ingconstantdataupdates. Transmissionoccurs
atthe endofeach displayupdate.
TheDemandModeallowscontrolfromahost
device,usually aPC,and canbeactivated by
pressingthe PRINTkey onthefrontface.
Figure 5 shows the suggested cable diagram
for interface to a PC. Figure 6 shows the serial
dataformat forContinuousMode whileFigure7
showstheserialdata formatfortheDemand
Mode.
RXD 2
TXD 3
GND 5
2 RXD
3 TXD
5 GND
4 DTR
6 DSR
8 CTS
Figure 5: Connection to PC
Indicator PC
RS-232 Communications
DSUB9 DSUB9

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DPI-500 Technical Manual
<STX> <POL> xxxxx.xx <L/K> <G/N> <STAT> <CR> <LF>
Start
Transmission
Polarity
<SP> = positive
"-" = negative
Weight Data
Units
L=pound
K = kilogram
Gross/Net
G=Gross
N= Net
Status
<SP> = Valid
M=Motion
O=Over/underrange
CarriageReturn
Line Feed
Figure 6: Serial Data Format for Continuous Mode
<STX> <POL> xxxxx.xx <SP> <LB/KG> <SP> <GR/NT> <CR> <LF>
Start
Transmission
Polarity
<SP> = positive
"-" = negative
Weight Data Units
lb=pound
kg= kilogram Gross/Net
GR=Gross
NT=Net Carriage
Return Line
Feed
Space Space
Figure 7: Serial Data Format for Demand Mode
1)Recognizedhostcommands:
"P" = Print
"Z"=Zerothescale
"T"=Tarethescale
"G" = Change to Gross Mode
"N" = Change to Net Mode
"C" = Change displayed units
RS-232 Communications (cont.)