Mircom LT-6500-OpenBAS User manual

Programming Manual

LT-6500 Rev. 0

June 2017

CONTENTS

1.0 UnderstandingtheBuildingAutomationControllerSoftware...................................................................................4

1.1 OpenBAS‐HV‐NX10PDatabaseDescription............................................................................................................4

1.2 OpenBASConfigurationToolDescription...............................................................................................................9

1.3 CommunicationSetup...........................................................................................................................................10

1.4 DeviceStatus.........................................................................................................................................................12

1.5 ActiveProjectSelection........................................................................................................................................13

1.6 ViewLocalandSlavesInputsandOutputsand

ManualOutputCommanding....................................................14

1.7 AnalogI/OViewingandSetupTypeandCalibration............................................................................................15

1.8 DigitalI/OViewingandCommanding...................................................................................................................19

1.9 RemotePointsandFieldbusCommunications.....................................................................................................22

1.10 LabelingandTaggingHardwareandSoftwareObjects........................................................................................26

1.11 SchedulingforLightingandGeneralPurposeUses..............................................................................................

28

1.12 DataLoggingandGraphics....................................................................................................................................32

1.13 VirtualWebServerEnabling.................................................................................................................................34

1.14 PLC(ProgrammableLogicController)...................................................................................................................36

1.15 DatabaseParametersViewingandModifying......................................................................................................37

1.15.1 ADF32‐bitregistersstoredinEEPROM......................................................................................................38

1.15.2 ADI16‐bitregistersstoredinEEPROM.......................................................................................................

39

1.15.3 ADB8‐bitregistersstoredinEEPROM........................................................................................................40

1.15.4 RES_BIT1‐bitresultregistersstoredinRAM...............................................................................................41

1.15.5 RES_FLT32‐bitresultregistersstoredinRAM..............................................................................................42

1.15.6 TMR16‐bitsystemtimersstoredinRAM...................................................................................................43

1.15.7 MIN/MAXSettingofMinimumandMaximum

limitsfordataregisters......................................................43

1.16 GeneralSystemConfiguration..............................................................................................................................45

1.16.1 ConfiguretheFieldbusCommunicationPorts..............................................................................................46

1.16.2 SetupRemotePointsinFieldbuses..............................................................................................................48

1.16.3 SetupExpandedRemotePointsinFieldbuses.............................................................................................48

1.16.4 SetupDualCoreRemotePointsinFieldbuses.............................................................................................48

1.16.5 SetupWirelessRemotePointsforWirelessThermostats...........................................................................49

1.16.6 ServiceEEPROMviewingandProgramming.................................................................................................49

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2

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1.16.7 ResetcontrollertoFactoryDefaultValues...................................................................................................51

1.16.8 SetupwhathappenstoMemoryandI/OonPowerOn..............................................................................52

1.16.9 SetuprealTimeClock...................................................................................................................................53

1.16.10 SetupDaylightSavingTime......................................................................................................................53

1.16.11 SetupHolidaysforSchedulingoperation.................................................................................................54

1.16.12 Create

andEditLabelTagsforidentifyingallyourI/OandDatabasevariables.......................................54

1.16.13 CreateandEditLabelTagsforRemotepointstoshowonLCDandBACnetnames................................55

1.16.14 SetupalarmmessagesforLCDoperatordisplay.....................................................................................56

1.16.15 Setuppersonalizedscreensforuser

interactionforLCDoperatordisplay.............................................57

1.16.16 SetupSMSmessagestosendovertheOpenBAS‐NWK‐SMSGSM/SMSmodule....................................59

1.16.17 SetupIPparametersforNetworkCardande‐mailsforeventandalarmreporting...............................60

1.16.18 SetupPasswordsfordifferentlevelsOperator,Technicaland

Administratoraccounts.........................64

1.16.19 CreatebackupsorrestoreallyourBuildingAutomationControllerprogramming.................................65

1.16.20 Viewhistoriclogofeventsofyourcontroller...........................................................................................66

1.16.21 Resetremotelycontrollerandsetupfirmwareupdates..........................................................................67

1.17 Reviewingversionhistory.....................................................................................................................................69

1.18 OpenPasswordaccessfor

Passwordlockedcontroller........................................................................................69

2.0 PLCLadderProgrammingBasics...............................................................................................................................70

2.1 PLCLadderProgrammingIntroduction.................................................................................................................73

2.2 OpenBAS‐HV‐NX10PPLCCanvas..........................................................................................................................76

2.3 MovingThroughyour PLCLadderLogicProgram.................................................................................................77

2.4 CopyandPasteofaPLCInstruction.....................................................................................................................78

2.5 Createa

newPLCInstruction................................................................................................................................78

2.6 Disabling,Enabling,andErasingPLCInstructions.................................................................................................79

2.7 Copy,MoveorEraseaBlockifPLCInstructions...................................................................................................79

2.8 SearchaspecificInstructionorDatabaseVariableinyourPLCProgram.............................................................80

2.9 SaveandRestoreyourPLCLadderLogicProgramto

andfromDiskinyourPC..................................................81

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3

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2.10 GenerateyourPLCDocumentation......................................................................................................................82

2.11 LibraryImportandExport.....................................................................................................................................85

2.12 TemplateBasedprogramming..............................................................................................................................87

2.13 ScriptBasedProgramming....................................................................................................................................88

2.14 AdvancedCProgrammingforrepetitiveandadvancedusers.............................................................................89

3.0 PLCLadderProgrammingDetailedProgrammingDescription.................................................................................91

3.1 LogicalBoolean

Instructions,AND,NAND,OR,NOR,XOR,NXOR,INVERT..........................................................92

3.2 Hysteresis/InRangecompare.............................................................................................................................95

3.2.1 HYSTERESISMODE........................................................................................................................................95

3.2.2 INRANGEMODE...........................................................................................................................................97

3.3 StartstopinstructionEasystart/stopwithemergencystop..............................................................................99

3.4 CombinedlogicAND–ORCombinedlogic

instruction......................................................................................100

3.5 MathInstructions,...............................................................................................................................................103

3.6 Compareinstructions,>,>=,<,<=,==(Equal),!=(NotEqual)...........................................................................105

3.7 JumpInstructions,ConditionalandUnconditionalProgramBranching.............................................................107

3.8 SubroutineCalls,ConditionalandUn conditionalSubroutineCalling.................................................................109

3.9 Totalizer,TotalAccumulator,PeriodTotalization,EnergyTotalization

.............................................................111

3.10 LightingGroups, CreatingaLightingGroup........................................................................................................116

3.11 TimerInstructions,Timer,FreerunOsci llator,ValuetoFrequencyConverter..................................................120

3.12 OutputAssignment,makingthingshappenintherealworld............................................................................125

3.13 ProportionalControl,PIDforAutomationandHVACapplica tions....................................................................129

3.14 Alternateand

Paralleling,AlternateandParallelingofPumpsandMachinery.................................................132

3.15 AHUandRTUstaging,CreateeasilySimple orComplexHVACsequences........................................................136

3.16 HourCounter,Createanhourcounter...............................................................................................................141

3.17 SectionLabels,OrganizeandDocumentyourPLCprograms.............................................................................143

3.18 SpecialUserProgramsLinkyourinterface

touser“Clanguage”createdInstructions.....................................144

3.19 ProgramEndInsertENDinstructionstoterminatePLCorexitsubroutinecalls..............................................144

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4



1.0 UnderstandingtheBuildingAutomationControllerSoftware



1.1 OpenBAS‐HV‐NX10PDatabaseDescription



TheinternaldatabaseoftheOpenBAS‐HV‐NX10Pisacollectionofobjectsthatcanbereadorwrittenby

thecontrolleritself,aswellasbyanyofthecommunicationchannels.Inthepicturebelowthelistofthis

collectionofobjectsisshown.

RAM

1 25 50 75 100 125 150 175 200 225 250

Hardware I/O

EEPROM

1..40

1..10

1..40

41..60

1..100

AI

BI

AO

BO

275 300 325 350 375 400

1..400

1..200

1..50

1..8

UI

ADF

32b

ADI

16b

ADB

8b

PLC

PLC2

PLC3

Labels

LCD Lab.

Alarms

Lighting groups 1-20

1..255

1..40

41..255

1..16 17..32

1..50

RMT-51..255

51..255

RMT-51..255

1..16 Stored in USB2 vault: RES_FLT-41..255 + RMT-51..255

Res_bit

Res_flt

TMR

RMT-CV

Res_bit2

Graphics

Symbols

LOG 1..200

Standad

Dual Core

NVRAM

Schedules

1..200 (Lighting) 1..200 (General)

RMT-51..255

RES_FLT-41..255

RMT-cfg 1..50

RES_FLT-41..255

RES_FLT-51..255

System and

COMM port

configuration

Real time clock

and calendar



InthefirstsectioninYELLOW,alltheHARDWAREobjectscanbeseen,evenwhileasingleOpenBAS‐HV‐

NX10Pcontrolleronlyhasthefollowingphysicalhardware:

 (8)Universalinputs(ThatcanbeAnalogorBinaryInputs)

 (8)BinaryOutputs

 (2)AnalogOutputs



5



However,thelogicoftheOpenBAs‐HV‐NX10Pcanaddressupto:



 (40)AnalogInputs (SharedwiththeBinaryInputsthroughtheUniversalInputs)

 (40)BinaryInputs (SharedwiththeAnalogInputsthroughtheUniversalInputs)

 (60)BinaryOutputs (40physicalrelaysand20virtualLightingGroups)

 (10)AnalogOutputs.



This is possible because eachOpenBAS‐HV‐NX10P controller can have four additional slave devices via

the communication Fieldbuses, and the operating system handles all necessary logic so that the

programmercanusethisadditionalhardwaredirectly.Thefollowingpictureshowsthisrelationship.



1 2

on

off

Master Slave

BUS-MASTER Slave address 100

Slave

Slave address 101

Slave

Slave address 102

Slave

Slave address 103

1 2

on

off

12

on

off

12

on

off

12

on

off

DIP-SW

for slave

address



Whenconfiguringthecontroller´scommunicationports(seesection6.3CommunicationSetup)eachof

theadditionalexpansionboardscanbeconfiguredasa MasterorasaSlave.Ifconfiguredasaslave,the

address can be input directly by software or leave that field  as ZERO and select the slave address by

meansofsettingDIP‐SW(2)tothepositionsdepictedintheaboveimage.



ThefollowingpictureshowsthisI/OrelationshipintheMaster&Slavedevices.

BI-1

BI-8

BI-9

BI-16

BI-17

BI-24

BI-25

BI-32

BI-33

BI-40

Binary Inputs BI-1..40

Master Slave-100 Slave-101 Slave-102 Slave-103

AI-1

AI-8

AI-9

AI-16

AI-17

AI-24

AI-25

AI-32

AI-33

AI-40

Analog Inputs AI-1..40

Master Slave-100 Slave-101 Slave-102 Slave-103

BO-1

BO-8

BO-9

BO-16

BO-17

BO-24

BO-25

BO-32

BO-33

BO-40

BO-41

BO-60

Binary Outputs (Relays) BO-1..40 Lighting Groups 1..20 = BO-41..60

Master Slave-100 Slave-101 Slave-102 Slave-103 Virtual Lighting Groupsin RAM memory

AO-1

AO-2

AO-3

AO-4

AO-5

AO-6

AO-7

AO-8

AO-9

Analog Outputs AO-1..10

Master Slave-100 Slave-101 Slave-102 Slave-103

AO-10

Hardware mapping

Master and Slaves

Universal Inputs

UI-1..40

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6



TheEEPROMsectionthatishighlightedinCYANcontainsthecoreofthedatabase.Thefirstthreeobject

types contain 300 data registers of 32 bits (ADF), 16 bits (ADI) and 8 bits (ADB) that can be read or

written.ItsmainuseisassetpointsastheyareEEPROMbasedandtheirvalueswillremainevenifthe

batteryisdischarged.



1 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400

EEPROM

ADF

32b

ADI

16b

ADB

8b

PLC

PLC2

PLC3

Labels

LCD Lab.

Alarms

Graphics

LOG

Schedules

1..100

1..400

1..200

1..50

1..8

1..16 Stored in USB2 vault: RES_FLT-41..255 + RMT-51..255

1..200

1..200 (Lighting) 1..200 (General)

RMT-51..255

RES_FLT-41..255

RES_FLT-51..255

System and

COMM port

configuration

RMT-cfg 1..50



Thenfollowing this300 dataregisters,goesthe PLCinstructions, thestandard OpenBAS‐HV‐NX10Phas

400 INSTRUCTIONS, sometimes often referred as BLOCKS or EQUATIONS. If a Dual Core is installed, a

secondPLC2addsadditional400INSTRUCTIONSthatareruninsidethemainorfirstcoreprocessor.Also

athirdPLC3adds400additionalINSTRUCTIONSthatruninthesecondcore.



Then comes 200 text labels used to tag all the objects in the database,  these tags provide the

programmer a

clear text to label each of the objects used in  the program. Following are 50 additional

textlabelsusedtodisplayontheLCDthetaggednamesoftheremotepoints.Thistextisalsoavailable

whenreadingthisremotepointsviatheBACnetprotocol.



TheLCDoperator displaysup

toeightalarmsthatcanbeshown,andthe textthatis tobedisplayed is

storedinthissectionofthedatabase.



The following is a historical LOG event of 200 registers that keeps track of events such as: power off,

poweron,SMSmessagessent,batteryfailure,clock

settingetc.



Thencomesasectionthatkeepsinformationofupto400schedules,divided into200mainlytargetedas

lightingschedules,and200forgeneralschedulinguse.



The remote (RMT) point configuration is stored also in EEPROM whereas the remote current value is 

storedinRAM.



7



At the end of the EEPROM parameters comes the graphic configuration and the graphic data is

also stored here. For each graphic, up to 246 samples can be stored, with the addition of the

OpenBAS-ACC-EE256 256K Bytes external EEPROM up to 1000 samples can be stored for

each of the 16 graphics.

If a Dual Core processor is installed also the following information is stored without restrictions

of size, as it is only limited by the USB memory installed.

 Unlimited storage of the 16 basic graphics.

 Unlimited storage of the 256 remote points and the 256 result float registers.

 Unlimited storage of the 40 Binary Inputs, 40 Binary outputs.

 USB insertion and extraction log.

All configuration pertaining the controller configuration and the Fieldbuses are stored in this

EEPROM area.

RAM based database figure.

1 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400

RAM

Res_bit

Res_flt

TMR

RMT-CV

Res_bit2

1..255

1..40

41..255

1..16 17..32

1..50

RMT-51..255

51..255

RMT-51..255

RES_FLT-41..255

RES_FLT-51..255

Real time clock

and calendar



The RAM section of the database is backed up by a rechargeable battery that when fully charged can

keepthisinformationstoredfuruptosevendays.Afterthebatteryfullydischarges,alltheregistersare

set to ZERO on power up. The RTCC (Real Time Clock and Calendar) is backed up every  15 minutes in

EEPROMwhilethecontrollerisenergized,sointheeventthedeviceis

powere doffformorethanseven

daysandthebatteryfullydischarges,thecontentsoftheclockatthemomentofthelastpoweroffwill 

remainstoredforreference.



IntheRAMarestoredvaluesthatchangefreque ntly.TheEEPROMhasthelimitationthatthevaluescan

onlybe

 changed1,000,000 times,after thistheEEPROM  cells wear outand the datacannot longer be

stored.WhereastheRAMhasunlimitedread/writecyclesbutmustbebatterybackedup.



The first  objects stored in RAM are 255 RES_BIT (Result Bit) registers that keep results of binary

operations

andcanonlybe0/1.IftheDualCoreisinstalled255additional RES_BIT2 registersexist,but

becausetheyareinsidetheDualCoreanditsRAMhasnobatterybackup,allvaluesaresettoZEROona

powerfailure.



8



Then comes a block of 40 RES_FLT (Result Float) registers, that keeps storage of operations with real 

values stored in IEEE 32 bit registers. Also if the Dual Core is installed, additional RES_FLT registers

41..255 are present in the Dual Core RAM and are also not battery backed up and

 set to ZERO on a

poweroffevent.



The controller has  16 system timers that de crement to ZERO in 1/10 of a sec or 1 second intervals

dependingontheirsetup,andthisreversecountersarealsostoredinRAM.Anadditional16timersare

presentintheDualCore

RAMandarealsonotbatterybackedupandsettoZEROonapoweroffevent.



The remote points CURRENT VALUES that are acquired via the Fieldbus communication ports are also

storedinRAM,REMT‐1..50arebatterybackedup.RMT‐51..255andRES_FLT‐41..255thatarepresentif



the Dual Core is installed are in their RAM and are also not battery backed up and set to ZERO on a

poweroff event. Theexce ption to thisis if insteadof theDualCorethe OpenBAS‐ACC‐NV32K memory

expansion is installed. These additional remote points CURRENT VALUES

are stored in NON VOLATILE

RAMandtheirvaluespersis tbetweenpoweroffevents.



TheRTCC(RealTimeClockandCalendar)isalsobackedupbythesamebatterythatkeepsRAM,andas

the RTCC resides physically inside of the main processor and shares it´s storage with the

microcontroller´s

RAM, both memories are backed up by the rechargeable 3.6 Volt 300 mA/h

rechargeablebattery.



The battery is only needed by master controllers, slave controllers usually don´t need the battery

installed,unlesstheyalsoactasmastersinanyoftheirField busesorhaveaPLCprogramthatdepends

on

schedules.Thefollowingpictureshowsthelocationofthebatteryonthecontrollerboa r d.



9



1.2 OpenBASConfigurationToolDescription



To program the OpenBAS‐HV‐NX10P series of controllers a companion software is available. The

OpenBAS‐SW‐CFGTLconfigurationtoolallowstofullyprogrameverydetailofthecontroller,toperform

the duty it is assigned to do. The following image shows the program´s main screen, in the following

sectionseachofthemaincomponentswillbedescribedinfulldetail.



Theconfigurationtoolcurrentlysupportssixlanguagesandbyselectingthedropdownlist,theinterface

oftheprogramisautomaticallychangedtotheselectedlanguage.



10



1.3 CommunicationSetup



The first section of the configuration tool is the communication section  where the method for

connectingtothecontrollermustbeselected

.

Direct communication via USB cable Communication via Network card IP

Address the master Address a slave Address the master Address a slave

Thefirst stepistoselectifwewanttocommunicatewiththemastercontrollerorwithanyoftheslaves

connectedthruthemaster’sFieldbuses. ByselectingtheUSBcheckbox,theaddressischangedto“255”

andnowcommunicationiswiththeMASTER(orthedevice physicallyattachedtothe

otherendofthe

USBcable)thisiscalledDIRECTCONNECTION.



If the USB checkbox is de‐selected, then the address field is enabled, and the address of the slave

connectedtothemaster’sFieldbuswillbenowaddressed.Forthesoftwaretobeabletocommunicate

toaslave

thefollowingmustbepreviouslyconfigured:

 TheFieldbusofthemastermustbesetasmasterwiththecorrectsettingsofprotocolandbaud

rate.

 Theremotepointsmustbeaddedinthemaster,soitknowswhichmasteritmustlookfor.

 Theslavesmustbe

setaccordinglyandconnectedinthenetworkandbepowered.

Once the slaves come“online” in the master, they canbe accessed indirectly via the master as ifthey

wereconnecteddirectlyusingtheUSBport.



Seethefollowingsectionsformoreinformationonhowtosetupslaves:



6.16.1 ConfiguretheFieldbusCommunicationPorts

 6.16.2 SetupRemotePointsinFieldbuses



11



Thefollowingdiagramillustratestheconnectionsmadewithdifferentselections:

USB cable

Fieldbus

Direct USB

connection

Master (255)

Slave (101)

Fieldbus

Master or slave

SPI

link

Master (255)

Slave (101)

SPI

link

Network

card

IP Connection

Network

card

IP Connection

Case 2:

Indirect connection via USB cable using slave address 101

Case 3:

Connection via IP via network card

using USB (bridging via SPI) address 255

Case 4:

Connection via IP via network card using

using slave address 101

ADDRESSED DEVICE

USB cable

Direct USB

connection

Master or slave

Case 1:

Direct connection via USB cable using USB address 255



12



1.4 DeviceStatus



On the bottom left of the screen, the DEVICE STATE group gives graphical information of the current

statusofthedevicebeingaddressed.

Icon showing "Extended Instructions Bootloader" is present

Icon showing "Standard controller is ON-LINE"

Icon showing "Everithing Normal"

Software revision of OpenBAS-SW-CFGTL configuration tool

Software revision firmware loaded in OpenBAS-HV-NX10P controller

Real Time Clock and Calendar information (RTCC)

Name of the controller (Text ID description)

Icon showing "Standard Instructions Bootloader" is present

if this is the case the bootloader bust be invoked by software,

see section:

6.16.21 6.16.21 Reset remotely controller and set up firmware updates

Icon showing "Dual Core controller is ON-LINE"

Icon showing "OFF-LINE"

or controller

has not

been found

Check IP or

USB connection

Icon showing PLC is

curently disabled

(Instructions not being

executed)

Icon showing

there is an ALARM

present, the alarm

button appears to

show active

alarms



13



1.5 ActiveProjectSelection

On the bottom of the program screen is a section called ACTIVE PROJECT, when interacting with the

OpenBAS‐HV‐NX10PcontrollertheLIVEorON‐LINEdatabaseisalwaysbeingaccessed.



Whenthereistheneedtosavethecurrentchangestodisk, aprojectmustbeselectedwherethe

files

thatcontainthechangesmadeonlinecanbestoredandlaterretrievedforrestoringifneeded.

Current project directory is shown on this field

Pressing CHANGE allows a

new project to be selected

Therearetwobuttons:CHANGEthatallowstheusertoselectanewexistingprojectandLISTthatbrings

alistofmostrecentlyusedprojects.



Tocreateanewproject,refertosection:

 6.16.19CreatebackupsorrestoreallyourBuildingAutomationControllerprogramming



14



1.6 ViewLocalandSlavesInputsandOutputsandManualOutput

Commanding

Whenonthemainscreen,pressingtheCOMMANDbutton,opensascreenwherethestatusandvalues

ofalltheHARDWAREdatabaseI/Ocanbeviewedandtheoutputscommandedoroverridden.



Whenonthemainscreen,pressingtheCOMMANDbuttonopensascreenwherethestatusandvalues

oftheentireHARDWAREdatabaseI/Ocanbeviewedandtheoutputscommandedoroverridden.

Master or slaves selection buttons

Binary Inputs

names and current

status

Analog Inputs

names and current

status

Binary Outputs, names

and current status

Local (RED) and remote (YELLOW)

override icons, show if outputs are

overriden, Local overrided done at the

LCD operator have the highest priority,

and can only be liberated locally.

Analog Outputs, names

and current values

Remote overrides via

communications of

Binary and Analog

Outputs



15



1.7 AnalogI/OViewingandSetupTypeandCalibration



Whenonthemainscreen,pressingtheVIEWSTATUSbuttonopensascreenwherethecurrentvalueof

theanaloginputscanbeviewedandtheanaloginputscanbeconfiguredandcalibrated.



TheactualstatusoftheAnalogInputsAI‐1..40andtheanalogoutputsAO‐1..10canbeviewedalong

withanylabeltagthathasbeensetup.Thetwobuttonsatthebottomallowtovisualizethe>>following

10orthe<<previous10.



Toselectthetypeofanaloginputandadjustthecalibrationselectthebutton:CALIBRATEANALOGINPUTS,inthescreen

that we see on the next page, select the Analog Input number, the type and the value that indicates the multiplier /

offsetisthecalibrationvaluecanbeadjusted.



16



Iftheselectedtypeisofaresistivetemperaturesensortypeorthermocouple,thecalibrationvaluewillbeanoffsetthat

willaddorsubtract(incaseofbeingnegative)tothecurrentvalue.Fortheothertypes,itwillbeamultipliertoconvert

thevalueofinputto

arealvalue.

IMPORTANT, if the input type is resistive 1000  ohms in Fahrenheit d egrees or Celsius, you should set the

correspondingDIP‐SWtotheONpositionsothatitreadsthevaluecorrectly.ForalltheothertypestheDIP‐SWmust

beintheOFFposition.

Forexample,foravoltagesignalof0‐10 voltsthatrepresentsapressureof0‐250PSI,thevalueofthemultiplierwillbe

of25.Sowhenreadingthecontrol10volts,itwillmultiplyitby25andtheshowedvaluewillbe250.

Forthetypeof

4‐20ma.WithamultiplierofONE(1.0)thevaluewillmeasure0‐100percentofthevalue.Iffollowingthe

previous example, we use a pressure transducer in which the range of 4‐20 milliamperes represents 0‐250 PSI, the

multipliervaluemustbeof2.5,beingthat

the100% thevaluewhenthereis20mA.multipliedby2.5willgiveperresult

thecorrectvalueof250.

IMPORTANT,if theinput type4‐20 ma,between theinputand thecommonof0V youmust installa resistorof 250

ohms@½watt1%,forthemeasurementtobecorrect,viewtheconnectionsectionforthewiringdetail.

Youcanadjustinsmallfractionsusingtheruleofthreebetweenthecurrentvalueandwhatyoureadwithanaccurate

referenceifyouwanttofurthercalibratethemeasurement.

Itisalsoagoodpracticetoavoidmistakes,toputthemultiplierinitiallyonONE(1.0),thencalculatethe

ratioofvalueof

themultiplierbydividingthegivenreadvaluewiththecurrentmeasuredvalue.

The buttons <<and >>allows us visualizethe previous or the followinginput, or can keyin directly the desiredinput

numbertosee,andselectthebuttonREAD.



17



AfterselectingtheAnalog Inputtypeofthelist,orchangingthecalibrationvalue,selectSAVEtosendthechangestothe

controller.



YoucansavetheconfigurationtothePCtoBACKUPortotransfertoanothercontrol.Theadjustedvaluesarestoredin

thearchiveCALIB_AI.INI.Don’tmodifythisfilemanually,

IntheSYSTEMADJUSTsectionthereisanoptiontomodifytheINTEGRATIONTIMEfortheanaloginputs.Increase

itif

themeasurementvariesduetothenatureoftheprocessorduetointerferencesinthefield,orreduceitifyouneeda

fastresponseofthevariable’smeasurement.IftheintegrationvalueisZERO,themeasurementwillbeinstantlywithno

integrationatall.

Thescanning

timeoftheAnalogInputsis200milliseconds.Withthattheywillbeablehavefivereadingspersecond.If

the process variable varies tooquickly, the integration rangeof 0..250 (1/5 ofsecond) will give an integrationtime of

ZEROupto50seconds.

Itisrecommendedtouseintegration

valuesof10secondsorhigherforHVACprocesslikepressurecontrolsloops.

ThereisanewfeaturebypressingtheINFObuttononthemainscreenthattheindividualintegrationtimeforeachof

theAnalogInputscanbeset.Seethepictureinthefollowingpag e.



18



HeretheintegrationtimecanbesetindividuallyperAnalogInput,andaresolutionof50millisecondsis

available

.

Asthisisa  softwarefilteringfeatureavailable onlytolocalhardwareAnalogInputs, onlyAI‐1..8canbe

adjusted,whereasthesettingonthepr eviouspageappliestoallAnalogInputsAI‐1..40.

The setting on this screen has precedence over the general setting. For  example the value set here

 is

ZERO,theAI willuse thegeneralintegration value,butif setwith avalue between1..255then the AI‐

1..8withthatnonZEROvaluewillusethenewintegrationconstant.

ThiscanhelptofilteraspecificAnalogInputthatisaffectedbynoisewithoutaffectingthe

settingofthe

restoftheAnalogInputs.

Mircom LT-6500-OpenBAS User manual

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