Sierra 100-SmartTrak - Compod User manual

Compod™InstructionManual IM‐COMPODRev.C.1 1



Compod™

Programmable Control Module For

100 Series Digital Mass Flow Meters & Controllers

Instruction Manual

IM-COMPOD

Revision: C.1, November 2010



CORPORATE HEADQUARTERS

5 Harris Court, Building L, Monterey, CA 93940 USA

Phone (831) 373-0200 (800)-866-0200 Fax (831) 373-4402

www.sierrainstruments.com

EUROPEAN HEADQUARTERS

Bijlmansweid 2 1934RE Egmond aan den Hoef

The Netherlands

Phone +31 72 507 1400 Fax +31 72 507 1401

ASIA HEADQUARTERS

Rm. 618, Tomson Centre, Building A, 188 Zhang Yang Road

Pu Dong New District, Shanghai, P. R. China

Phone: +86 21 5879 8521 Fax +8621 5879 8586

Compod™InstructionManual IM‐COMPODRev.C.1 2



IMPORTANTCUSTOMERNOTICE

Sierra Instruments, Inc. is not liable for any damage or personal injury, whatsoever, resulting

from the use of Sierra Instruments standard mass flow meters or controllers for oxygen gas.

You are responsible for determining if this mass flow meter or controller is appropriate for

your oxygen application. You are responsible for cleaning the mass flow meter or controller

to the degree required for your oxygen flow application.



©COPYRIGHTSIERRAINSTRUMENTS2010

No part of this publication may be copied or distributed, transmitted, transcribed, stored in a

retrievalsystem,ortranslatedintoanyhumanorcomputerlanguage,inanyformorbyanymeans,

electronic, mechanical, manual, or otherwise, or disclosed to third parties without the express

written permission of Sierra Instruments. The

 information contained in this manual is subject to

changewithoutnotice

.



TRADEMARKS

Compod™,Smart‐Trak®,andDial‐A‐Gas™aretrademarksofSierraInstruments,Inc.Otherproduct

and company names listed in this manual are trademarks or trade names of their respective

manufacturers

.



Compod™InstructionManual IM‐COMPODRev.C.1 3



TABLEOFCONTENTS

IMPORTANTCUSTOMERNOTICE........................................................................................2



CHAPTER1:INTRODUCTION............................................................................................... 7



CHAPTER2:INSTALLATION.................................................................................................8



CHAPTER3:ELECTRICALCONNECTIONS..............................................................................9

Pinconfiguration...................................................................................................................9

InstrumentandCompod™power.......................................................................................10

RS485connection................................................................................................................10

General2‐wiretopologyRS485network............................................................................11

Daisychainunits..................................................................................................................11

CHAPTER

4:COMMUNICATING.........................................................................................13

Powerup..............................................................................................................................13

Dataformatvariousregisters..............................................................................................13

Modbusregistersoverview.................................................................................................14

Special–Modbussetup......................................................................................................16

Registersexplained..............................................................................................................16

SpecialModbussetupregisters..........................................................................................23

Chapter5:Alarmsystem..................................................................................................24

Examples..............................................................................................................................27

Flowhighandlowalarm

......................................................................................................27

Shutdownflowthroughexternalpushbutton...................................................................28

Filltankwithgastomaintain pressure le vel.......................................................................28

Chapter6:Displaymodule................................................................................................30

Screenmodes:.....................................................................................................................31

Chapter7:Bootloader......................................................................................................32

LoadFirmware.....................................................................................................................33

Compod™InstructionManual IM‐COMPODRev.C.1 4



SetupFirmware...................................................................................................................35

Quit......................................................................................................................................36

Troubleshooting..................................................................................................................36

APPENDIXA:COMPOD™APPLICATIONMANUAL.............................................................37

SystemRequirementsandSoftwareInstallation…………………………………………………………….37

PowerUp……………………………………………………………………………………………………………………….38

Compod™Application…………………………………………………………………………………………………….39

DeviceTab………………………………………………………………………………………………………………………40

AlarmSystemTab……………………………………………………………………………………………………………40

Analog&DigitalOutTab…………………………………………………………………………………………………42

PulseOutputTab…………………………………………………………………………………………………………….43



AppendixB:Model180+Compod™.................................................................................44

Safetyinformation

...............................................................................................................44

AppendixB:ELECTRICALCONNECTIONS...........................................................................45

Pinconfiguration.................................................................................................................45

RS485connection................................................................................................................46

Connection...........................................................................................................................46

General2‐wiretopologyRS485network............................................................................46

Analoginputs.......................................................................................................................47

APPENDIXB:COMMUNICATING.......................................................................................48

Powerup..............................................................................................................................48

Dataformatvariousregisters..............................................................................................48

Modbusregistersoverview.................................................................................................

49

Special–Modbussetup......................................................................................................50

Registersexplained..............................................................................................................51

40124:Sensordata..............................................................................................................55

40125:Setunittozero.........................................................................................................55

40126:Resetunittofactorydefault....................................................................................55

SpecialModbussetupregisters..........................................................................................56

Compod™InstructionManual IM‐COMPODRev.C.1 5



AppendixB:Alarmsystem................................................................................................57

Alarmprinciple....................................................................................................................57

Alarmcontrol.......................................................................................................................57

Alarmcontrolregister(40023)............................................................................................57

Triggersource(40024).........................................................................................................58

Triggerpoint(level).............................................................................................................58

Alarmstatusregister...........................................................................................................59

AppendixB:Bootloader...................................................................................................59

LoadFirmware.....................................................................................................................60

SetupFirmware...................................................................................................................62

Quit......................................................................................................................................

63

Troubleshooting..................................................................................................................64



Compod™InstructionManual IM‐COMPODRev.C.1 6



DOCUMENTHISTORY:



Rev1.0 Draftversion

Rev1.1 Descriptionofthealarmsupdated.Nowmentionstwotrigger

pointsforeachalarm.Exampleshavebeenupdated.Registershave

beencorrectedtoreflectthenewregistermap.Also,AppendixA

onCompod™ApplicationandAppendixB:Model180+Compod™

added.



Compod™InstructionManual IM‐COMPODRev.C.1 7



CHAPTER1:INTRODUCTION

TheCompod™isaModbusadd‐onmoduleforSierraInstruments’Smart‐Trak®Series100gasflow

measurementandcontrolinstruments.

AvarietyoffeaturesenabletheintegrationoftheSmart‐Trak®intoaModbusnetwork

environment.Amongthesefeatures:

 Accesstoallvitaldata

 Sophisticatedalarmsystem



Totalizer

 Pulseoutput

 Analoginputs

 Smart‐Trak®functionalitymonitor

 Digitaloutputs



SAFETYINFORMATION

Cautionandwarningstatementsareusedthroughoutthismanualtodrawyourattentionto

importantinformation.



Caution!

Thisstatementappearswithinformationthatis

important for protecting your equipment and

performance. Read and follow all cautions that

applytoyourapplication



Warning!

Thisstatementappearswithinformationthatis

important to protect people and equipment

from damage. Pay very close attention to all

warningsthatapplytoyourapplication

TIP



TOFULLYUNDERSTANDTHECOMPOD™ANDITSFUNCTIONSITISADVISEDTO

ALSOREADTHESMART‐TRAK®SERIES100INSTRUCTIONMANUAL



Compod™InstructionManual IM‐COMPODRev.C.1 8



CHAPTER2:INSTALLATION

WhentheCompod™needstobeaddedtoaSmart‐Trak®pleasecontactthefactory.



Compod™InstructionManual IM‐COMPODRev.C.1 9



CHAPTER3:ELECTRICALCONNECTIONS

AllelectricalconnectionsaremadeontheleftsideoftheCompod™.TherearetwoD9connectors

whichgiveaccesstoinputpower,networkinterfaceandotheroptions.



PINCONFIGURATION

Theimagebelowshowsthenameoftheconnectorandthelocationof“pin1”



COM1  COM2

Pin Function Pin Function

1(arrow) RS485Shield 1(arrow) RS485Shield

2 +24VPower 2 +24VPower

3 ID0

–

selectionbit 3 Analoginput1

4 ID1

–

selectionbit 4 Pulseout/Analoginput2

5 RS485

–

B 5 RS485

–

B

6 ID2

–

selectionbit 6 Digitalout1

7 Ground 7 Ground

8 ID3

–

selectionbit 8 Digitalout2

9 RS485

–

A 9 RS485

–

A



THEPINOUTFORP1CANBEFOUNDINTHESMART‐TRAK®SERIES100

INSTRUCTIONMANUAL



Duringpower‐uporresettheIDpins(TTLcompatible)arescanned.ThesepinssettheModbusID

code.



COM1

COM2

P1

Compod™InstructionManual IM‐COMPODRev.C.1 10



ID3 ID2 ID1 ID0 ModbusID

open open open open InternalID

open open open GND 1

open open GND open 2

open open GND GND 3

‐ ‐ ‐ ‐ 

GND GND GND GND 15

(Connectthepinwithgroundtoenable)

INSTRUMENTANDCOMPOD™ POWER

The+24Vpowerandpowerreturn(GND)oftheinstrumentandtheCompod™areconnected

internally.Powercanbeappliedinthefollowingtwoways:

1. ConnectthepowertotheHDDB‐15connector(P1)oftheinstrument

2. ConnectthepowertooneoftheDB‐15connectors(COM1

orCOM2)oftheCompod™

Powersupplyrequirements

Instrumenttype Recommendedinputvoltage Minimumcurrentrequirement(mA)

Meter 12‐30Vdc 250

Controller 24‐30Vdc 410



RS485CONNECTION



THECOMPOD™ISEQUIPPEDWITHANOPTICALISOLATEDRS485INTERFACE.

DON’TCONNECTTHERS485SHIELDTOTHEGROUNDOFTHEPOWERSUPPLY

UNLESSTHEISOLATEDBARRIERISN’TREQUIRED.



Compod™InstructionManual IM‐COMPODRev.C.1 11



GENERAL2‐WIRETOPOLOGYRS485NETWORK



The“RS485–A”(alsoreferredas‘‐‘)isconnectedwiththeD0line.The“RS485–B”(alsoreferred

as‘+‘)isconnectedwiththeD1line.Theshieldisconnectedtothecommonlineofthenetwork.

Theuseoflineterminatorsdependsoncablelengthsand

shouldbedeterminedonsite.



DAISYCHAINUNITS

ItispossibletodaisychainafewunitsusingtheCOM1&COM2connections.Aspecialcablecanbe

usedtolinkthefirstunitthroughCOM2withthenextunitthroughCOM1.



Theimagebelowdemonstrateshowtheunitscanbelinked.



MASS FLOW MASS FLOW MASS FLOW

Compod™InstructionManual IM‐COMPODRev.C.1 12



THENUMBEROFUNITSWHICHCANBELINKEDDEPENDSONTHETOTAL

POWERCONSUMPTION.AMAXIMUMCURRENTOF3AMPSMUSTNOTBE

EXCEEDED!



Thefollowingpinsareusedforthelinkcable:

 1(RS485shield)

 2(+24Vpower)

 5(RS485–B)

 7(Ground)

 9(RS485–A)

ANALOGINPUTS

Theanaloginputscanbeusedtoconnectvarioustransducers(temperature,pressureetc.).

Maximuminputrangeis0‐10Vdcor0‐20mA.VariousoptionscanbesetthroughtheModbus

controlregister(40028).Analoginput2(COM2‐4)hasadualfunction.Whenthepulseoutputis

enabledthen

theanaloginputwillnotbeavailable.



PULSEOUTPUT

Thepulseoutputisaswitchtogroundwithaseriesresistorof250ohms.



THEMAXIMUMCURRENTTHEOUTPUTCANSWITCHIS20MA.DONOTEXCEED

THISVALUEORDAMAGEMAYOCCUR.



DIGITALOUTPUTS

TherearetwodigitaloutputsavailablewhichcanbecontrolledthroughModbus.Theoutputsare

TTLcompatible.

Theoutputsarealsobeusedthealarmsystemwhenenabled.

RELAYOUTPUTS

Ifrequiredtheoutputscanbechangedintorelayoutputsthroughaspecialoptionaladd‐on.Please

contactyoursalesrepresentativeformoreinformation.



NEVERCONNECTAREMOTEPILOTMODULETOTHEINSTRUMENTWHENA

COMPOD™ISMOUNTEDONIT.DAMAGECANOCCURE.



Compod™InstructionManual IM‐COMPODRev.C.1 13



CHAPTER4:COMMUNICATING

OncetheCompod™iswiredtothenetworkandpoweredupitistimetocommunicatewithit.The

settingsfortheModbusinterfaceareasfollowing:

 IDcode=255(or1–15dependingontheIDpinsettings)

 Baudrate=19200

 Parity=Even



 Numberofbits=8

 Stopbit=1

 Delaybetweenreceivingandtransmitting=2ms 

Theabovesettingsarefactorydefaultsandcanbechanged.Changingthesettingscanbedone

throughthebootloaderorspecialregisters.



POWERUP

WhenpoweredupthegreenLEDontopoftheCompod™enclosurewillflashtwice.Duringthis

timeitispossibletoenterthebootloader(seeChapter7onbootloaderformoreinformation).

AftertheflashingtheredLEDwilllightupindicatingtheinitializationphase.Duringthistimedata



isretrievedfromtheSmart‐Trak®andstoredintotheCompod™memory.Thereisno

communicationthroughModbuspossibleatthisstage.

OncealldataisretrievedtheredLEDgoesoffandthegreenLEDwillstartblinkingasitreceives

datafromtheinstrument.CommunicationthroughModbusis

possiblenow.

Ifthecommunicationwiththeinstrumentislostforsomereason,theCompod™willtryto

establishitagain.DuringthisphasetheModbusinterfacewillnotbeactive.

TheredLEDwilllightupeverytimeanetworkmessageisreceivedwiththecorrectIDcode.



LED’sshowingtheactivitiesoftheCompod™

DATAFORMATVARIOUSREGISTERS

 32bitreal:IEEE754floatingpoint,lowwordfirst

 BCDencoded:hexencodeddecimalvaluesf.i.0x89=decimal89

 8&16bitsint:unsignedintegervalues

 16bitsASCII:ASCIIencodedcharacters,highword=1

character.0x4944=“ID”



Compod™InstructionManual IM‐COMPODRev.C.1 14



MODBUSREGISTERSOVERVIEW



PDU

Address

Dynamicdata

$00 40001 Actualflow‐ lowword R 32bitsreal 2

$01 40002 Actualflow‐ highword 

$02 40003 Setpoint‐ lowword R/W 32bitsreal 2

$03 40004 Setpoint‐ highword 

$04 40005 Totalizer3,4 R/W(Reset) BCDencoded 4

$05 40006 Totalizer1,2 R 

$06 40007 Totalizer7,8 R 

$07 40008 Totalizer5,6 R 

$08 40009 Valvepower R 16bitsint. 1

$09 40010 AnalogCH0 R 16bitsint. 1

$0A 40011 AnalogCH1 R 16bitsint. 1

$0B 40012 DigitalData‐ IN R 16bitsint. 1

$0C 40013 DigitalData‐ OU

R/W 16bitsint. 1

$0D 40014 Alarmstatus R/W 16bitint. 1

Settings

$0E 40015 Factoryf.s

–

lowword R 32bitsreal 2

$0F 40016 Factoryf.s

–

highword 

$10 40017 Userf.s

–

lowword R/W 32bitsreal 2

$11 40018 Userf.s

–

highword 

$12 40019 Gasspan

–

lowword R/W 32bitsreal 2

$13 40020 Gasspan

–

highword 

$14 40021 Trig1Low

–

lowword R/W 32bitsreal 2

$15 40022 Trig1Low

–

highword 

$16 40023 Trig1High

–

lowword R/W 32bitsreal 2

$17 40024 Trig1High

–

highword 

$18 40025 Trig2Low

–

lowword R/W 32bitsreal 2

$19 40026 Trig2Low

–

highword 

$1A 40027 Trig2High

–

lowword R/W 32bitsreal 2

$1B 40028 Trig2High

–

highword 

$1C 40029 AlarmControlregister R/W 16bitint. 1

$1D 40030 Triggersource1 R/W 16bitint. 1

$1E 40031 Triggersource 2 R/W 16bitint. 1

$1F 40032 Analoginputsetting R/W 8bitsint. 1

$20 40033 Pulseoutcontrol R/W 16bitsint. 1

$21 40034 Gasindex R/W 8bitsint. 1

$22 40035 Valvepositionindex R/W 8bitsint. 1

$23 40036 Flowunitindex R/W 8bitsint. 1

$24 40037 Password R/W 16bitsint. 1

$25 40038 Inputsetpointindex R/W 8bitsint. 1

$26 40039 Analogoutputindex R/W 8bitsint. 1

Staticdata

$27 40040 Devicefirmrev

–

lowword R 32bitsreal 2

Compod™InstructionManual IM‐COMPODRev.C.1 15



$28 40041 Devicefirmrev

–

highword 

$29 40042 Devicetype R 16bitsASCII 1

$2A 40043 Serialnumber

–

char1,2 R 16bitsASCII 4

$2B 40044 Serialnumber

–

char3,4 

$2C 40045 Serialnumber

–

char5,6 

$2D 40046 Serialnumber

–

char7,8 

$2E 40047 Tagnumber‐ char1,2 R 16bitsASCII 5

$2F 40048 Tagnumber‐ char3,4 

$30 40049 Tagnumber‐ char5,6 

$31 40050 Tagnumber‐ char7,8 

$32 40051 Tagnumber‐ char9,10 

$33 40052 Gas1

–

char1,2 R 16bitsASCII 8

  

$3A 40059 Gas1

–

char15,16 

$3B 40060 Gas2

–

char1,2 R 16bitsASCII 8

  

$42 40067 Gas2

–

char15,16 

$43 40068 Gas3

–

char1,2 R 16bitsASCII 8

  

$4A 40075 Gas3

–

char15,16 

$4B 40076 Gas4

–

char1,2 R 16bitsASCII 8

  

$52 40083 Gas4

–

char15,16 

$53 40084 Gas5

–

char1,2 R 16bitsASCII 8

  

$5A 40091 Gas5

–

char15,16 

$5B 40092 Gas6

–

char1,2 R 16bitsASCII 8

  

$62 40099 Gas6

–

char15,16 

$63 40100 Gas7

–

char1,2 R 16bitsASCII 8

  

$6A 40107 Gas7

–

char15,16 

$6B 40108 Gas8

–

char1,2 R 16bitsASCII 8

  

$72 40115 Gas8

–

char15,16 

$73 40116 Gas9

–

char1,2 R 16bitsASCII 8

  

$7A 40123 Gas9

–

char15,16 

$7B 40124 Gas10

–

char1,2 R 16bitsASCII 8

  

$82 40131 Gas10

–

char15,16 

$83 40132 Sensordata R 8+8bitint. 1

$84 40133 Setunittozero R/W($A5) 8bitsint. 1

$85 40134 Resetunittofactorydefault R/W($A5) 8bitsint. 1



Compod™InstructionManual IM‐COMPODRev.C.1 16



SPECIAL–MODBUSSETUP



PDU

Address

$1003 44100 ID(1‐247) R/W 16bitint. 1

$1004 44101 Baudrate

1=4800,2=9600

3=19K2,4=38K4

5=57K6

R/W 16bitint. 1

$1005 44102 Parity

1=none,2=odd,3=even

R/W 16bitint. 1

$1006 44103 TXdelay(milliseconds) R/W 16bitint. 1

$1007 44104 Resetunit:

Readvaluefromthis

Thiswillresettheunit

R/W 16bitint. 1



REGISTERSEXPLAINED

Theregistersaredividedintofourgroups.Thefirstgroup(40001–40014)representsthedynamic

data.Thisgroupchangesthemost.Thesecondgroup(40015–40039)containsthesettingsfrom

theinstrumentandCompod™specificsettings.Thethirdgroupcontainsstaticdataaboutthe

instruments.Thelastgroup(44100

–44104)containsspecialfunctionstochangetheModbus

settingswhiletheunitisinthenetwork.

40001:Actualflow

Theactualflowasmeasuredbytheinstrument.

40003:Setpoint

Whenusingacontrollerthesetpointisshown.Writingtothisregisterwillsetthesetpoint.When

asetpointisenteredwhichisbeyondthefullscaleoftheinstrumentthenthesetpointwillbe

changedautomaticallytothefullscalevalue.



Compod™InstructionManual IM‐COMPODRev.C.1 17



40005–40008:Totalizer



TotalizervalueBCDencoded.Thefirsttworegistersarethevalueleftofthedecimalpoint.Thelast

tworegistersrepresentthevaluebehindthedecimalpoint.



Example:

40005=0x0010

40006=0x1204

40007=0x1654

40008=0x4500

Total=12040010.45001654

40009:Valvepower

Valuerepresentingthepowerinjectedintothevalue(whenusingacontroller).Thevaluewill

rangebetween0and3200(4095whenpurgingthevalve).

40010‐40011:Analoginputs1& 2

Valuesfromtheanaloginputsarepresentedasrawvaluesrangingbetween0and1023.The

analoginputsettingsdeterminetherange.

40012:Digitalinputs

ThisvaluereflectstheIDbitsonP1(truevalue,0=0,1=1).TheIDpinscanbeusedasTTLinputs

butkeepinmindthatduringpowerupthesepinsfunctionasIDpins.

40013:Digitaloutputs

Writingtothisregisterwillsetthetwoavailabledigitaloutputs(whennotassignedtothealarm

system).Digitaloutput1islinkedtobit0anddigitaloutput1islinkedtobit1inthevalue.

40014:Alarmstatus

Statusindicationforthealarms:Seechapteraboutthealarmsystemformoreinformation.

40015:Factoryfullscale

Factoryfullscalevalueoftheinstrument

40017:Userfullscale

Theuserfullscalevalueallowsyoutore‐rangetheinstrument.Anyvaluebetween50%and100%

ofthefactoryfullscaleisallowed.Thenewvaluewillalsoredefinetheanalogoutputsofthe

instrument(whenused).The20mA/5Vdcwillrepresentthenewfullscalevalue.

Compod™InstructionManual IM‐COMPODRev.C.1 18



40019:Gasspan

Thegasspanvalueallowsyoutore‐rangethefullscalevalueofeachavailablegas.Thisfunctionis

notsupportedonthefirstgenerationofSmart‐Trak®instruments.

40021:Triggerpointlowalarm1

Triggervalueforthelowpoint:Seechapteraboutthealarmsystemformoreinformation.

40023:Triggerpointhighalarm1

Triggervalueforthehighpoint:Seechapteraboutthealarmsystemformoreinformation.

40025:Triggerpointlowalarm2

Triggervalueforthelowpoint:Seechapteraboutthealarmsystemformoreinformation.

40027:Triggerpointhighalarm2

Triggervalueforthehighpoint:Seechapteraboutthealarmsystemformoreinformation.

40029:Alarmcontrolregister

Seechapteraboutthealarmsystemformoreinformation.

40030:Triggersourcealarm1

Triggersourceforalarm1:Seechapteraboutthealarmsystemformoreinformation.

40031:Triggersourcealarm2

Triggersourceforalarm2:Seechapteraboutthealarmsystemformoreinformation.

40032:Analoginputsettings

Thisregistercontrolsthewaytheanaloginputsbehave.Thetablebelowshowsthepossible

settings.

Bit Function

 Analoginput1

0 Inputmultiplier,0=1x,1=0.5x

1 Inputmode,0=voltage,1=current

 Analoginput2

2 Inputmultiplier,0=1x,1=0.5x

3 Inputmode,0=voltage,1=current

 Commonsettings

7 Reference,0=2.56V,1=5V

Compod™InstructionManual IM‐COMPODRev.C.1 19



Whenthepulseoutputisactivatedthenanaloginput2willbedisabled.

40033:Pulse outputcontrol

Whenenabled(valuenotequaltozero)thepulseoutputwillgenerateapulseeverytimethe

totalizerwillbeincrementedwithapredefinedvalue.Thepulseoutputcontrolregisterisdivided

intotwoparts.ThelowbyteofthewordrepresentstheincrementvalueNandthehighbyte

represents

thepulsewidth.



Highbyte Pulsewidth=valuex2.5ms(maxvalue=200)

Lowbyte N(maxvalue=255)

ExamplesettingN:

SupposetheflowoftheinstrumentissettoSLPM.WhenN=10thenapulseisgeneratedeach

timethetotalizerisincrementedwithatleast10SL.SettingNto1willgenerateapulseeachtime

thetotalizerisincrementedwithatleast1

SL.

Pulsewidth:

Thepulsewidthcanbesetbetween2.5and500milliseconds.Keepinmindthatathighflowsthe

totalizerwillincrementfastandwhenNsettoalowvaluethepulsewidthneedstobepickedwith

care.

Example:

Theflowisatagiven

pointequalto500SLPMandN=1.Thetotalizerwillbeincrementedfastata

rateof500/60=8.333SLpersecond.Thiswillmeanthatatleast8pulsesaregeneratedper

second(N=1).Ifthepulsewidthissetto500msec(2pulse

persecond)thenpulseswillgetlost.

Therecommendedpulsewidthwillbe1/(8+1)=110msec.Ifthecounterconnectedtothepulse

outputcan’thandlefastpulsesthentheNvalueneedstobeincreased.

40034:Gasindex

Valueshowswhichgasisselectedontheinstrument.Valuecanrangebetween1and10.



N

Pulsewidth

Compod™InstructionManual IM‐COMPODRev.C.1 20



40035:Valvepositionindex

Valvepositionindexisthemodeatwhichthevalveofthecontrollerwilloperate.Thetableshows

theavailablevalues:

Value Mode

1 Automatic

2 Closed

3 Purge

40036:Flowunitindex



Thevalueindicatestheselectedflowunitontheinstrument.Thetableshowstheavailablevalues:

Value Unit

1 Scc/s

2 Scc/m

3 Scc/h

4 Ncc/s

5 Ncc/m

6 Ncc/h

7 SCF/s

8 SCF/m

9 SCF/h

10 NM3/s

11 NM3/m

12 NM3/h

13 SM3/s

14 SM3/m

15 SM3/h

16 Sl/s

17 Sl/m

18 Sl/h

19 Nl/s

20 Nl/m

21 Nl/h

22 g/s

23 g/m

24 g/h

25 Kg/s

26 Kg/m

27 Kg/h

28 Lb/s

29 Lb/m

30 Lb/h

Sierra 100-SmartTrak - Compod User manual

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