Applications Guide Tracer Graphical Programming - Trane

Applications Guide Tracer Graphical Programming - Trane Applications Guide Tracer Graphical Programming - Trane

28.09.2014 Views

® Contents Arrangingblocks............................................21 Selectingandmovingblocks...............................21 Aligningblocks..........................................22 AddingaCompareblock .....................................22 AddinganOutputblock ......................................23 Connecting blocks using wired connections. . . . . . . ...............24 Savingaprogram...........................................25 Compiling a program . . . . . . . . . . . . ............................26 Closingaprogram...........................................27 Summaryquestions.........................................27 Chapter3 Modifyingtheexhaustfanprogram .......... 29 Whatyouwilllearn..........................................29 Skills. . . . . . . ............................................29 Conceptsanddefinitions..................................29 Blocks..................................................29 Openinganexistingprogram .................................30 Reviewingthesequenceofoperation...........................30 Deletingablock.............................................31 Addingadeadband..........................................32 Greaterthan(assumecooling) .............................32 Lessthan(assumeheating)................................32 Centered(assumecooling) ................................33 Addingavariable........................................34 UsingaConstantblockforadeadbandvalue.................36 Connecting blocks to a Deadband block . . . . . . . ...............36 Addingalarmindication......................................36 Addinganalarmvariable..................................36 Implementingatestforsensorfailure.......................37 UsingaSwitchblock.........................................38 AddingaSwitchblock ....................................38 Connecting the Switch block . . . ............................39 CompletingtheSwitchblockconnections....................40 SimplifyingtheprogramwithanOrblock.......................41 Printingaprogram ..........................................42 Downloadingaprogram......................................43 Debugging a program. . . . . . . . . . . . ............................43 Uploadingaprogram........................................44 Summaryquestions.........................................45 vi CNT-APG001-EN

® Contents Chapter 4 Cooling tower with two-speed fan example . . . . 47 Whatyouwilllearn.......................................... 47 Skills . ................................................. 47 Conceptsanddefinitions.................................. 47 Blocks ................................................. 47 Reviewingthesequenceofoperation........................... 48 Condenser water pump . . ................................. 48 Coolingtowerfan........................................ 48 Sumpheater............................................ 48 Alarms................................................. 48 Determiningaprogrammingapproach ......................... 52 Settingtheprogramproperties................................ 52 Writing the alarms module . . ................................. 53 Adding the input blocks. . ................................. 54 Addingtheoutputblock .................................. 55 Monitoringthesumptemperature.......................... 55 Comparing the sump temperature with the sump alarm setpoint andthefreezingpoint................................ 55 Timingthesumptemperaturealarm..................... 56 Controllingthesumptemperaturealarm................. 57 Indicatinganalarmforanytemperaturesensorfailure......... 58 Implementingthealarmresetfunction...................... 60 AddingaLatchblocktocontrolthealarm................. 61 Turningthealarmresetoffautomatically................. 63 Addingpagestoyourprogram................................ 65 Writing the sump heater module . . . . . . . . . . .................... 66 Adding the input blocks. . ................................. 66 Addingwirelessconnections........................... 66 Adding the other input blocks . . . . . . .................... 68 Addingtheoutputblock .................................. 69 Controlling the sump heater under normal conditions . . ....... 69 Comparing the outdoor air temperature with the freezing point. . 70 Controllingthesumpheateronoroff....................... 70 Writing the cooling tower fan module . . . . . . .................... 71 Adding the input blocks. . ................................. 71 Addingtheoutputblocks.................................. 72 Startingthefanatlowspeed .............................. 72 Transitioningthefantohighspeed ......................... 73 Transitioning the fan based on supply temp. . . . . . . . ....... 73 Transitioningthefanbasedontime ..................... 75 Summaryquestions......................................... 78 CNT-APG001-EN vii

®<br />

Contents<br />

Arrangingblocks............................................21<br />

Selectingandmovingblocks...............................21<br />

Aligningblocks..........................................22<br />

AddingaCompareblock .....................................22<br />

AddinganOutputblock ......................................23<br />

Connecting blocks using wired connections. . . . . . . ...............24<br />

Savingaprogram...........................................25<br />

Compiling a program . . . . . . . . . . . . ............................26<br />

Closingaprogram...........................................27<br />

Summaryquestions.........................................27<br />

Chapter3 Modifyingtheexhaustfanprogram .......... 29<br />

Whatyouwilllearn..........................................29<br />

Skills. . . . . . . ............................................29<br />

Conceptsanddefinitions..................................29<br />

Blocks..................................................29<br />

Openinganexistingprogram .................................30<br />

Reviewingthesequenceofoperation...........................30<br />

Deletingablock.............................................31<br />

Addingadeadband..........................................32<br />

Greaterthan(assumecooling) .............................32<br />

Lessthan(assumeheating)................................32<br />

Centered(assumecooling) ................................33<br />

Addingavariable........................................34<br />

UsingaConstantblockforadeadbandvalue.................36<br />

Connecting blocks to a Deadband block . . . . . . . ...............36<br />

Addingalarmindication......................................36<br />

Addinganalarmvariable..................................36<br />

Implementingatestforsensorfailure.......................37<br />

UsingaSwitchblock.........................................38<br />

AddingaSwitchblock ....................................38<br />

Connecting the Switch block . . . ............................39<br />

CompletingtheSwitchblockconnections....................40<br />

SimplifyingtheprogramwithanOrblock.......................41<br />

Printingaprogram ..........................................42<br />

Downloadingaprogram......................................43<br />

Debugging a program. . . . . . . . . . . . ............................43<br />

Uploadingaprogram........................................44<br />

Summaryquestions.........................................45<br />

vi<br />

CNT-APG001-EN

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