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1. 1 enable BOOL Enabling of the menu can be deactivated following a user command for entry in a submenu 1 enableSetMenu BOOL User command for entry into the set menu 2 enablePrgMenu BOOL User command for entry into the Prg menu 3 timeout BOOL Timeout detected in basic display mode 4 changeStateRequest BOOL User command for changeover of unit ON OFF status 5 newState USINT New value of unit ON OFF status requested by user if Air Handling Unit Baselines Developer s Manual 55 MET smart changeStateRequest is TRUE 6 changeModeRequest BOOL User command for changeover of operating mode COOL HEAT AUTO 7 newMode USINT New value of operating mode COOL HEAT AUTO requested by user if changeModeRequest is TRUE 8 changeFanSpeedRequest BOOL User command for fan speed change 9 newFanSpeed USINT New fan speed requested by user if changeFanSpeedRequest is TRUE 10 toggleTimeRequest BOOL User command to enable disable time frame operation 6 4 6 SKWPswProtection t Type Description Inputs INOUT variables Outputs FUNCTION BLOCK Block for password protection of access to a menu for remote keypad 1 timeout BOOL If TRUE access privileges forgotten due to timeout and the password must be re entered to gain access to the menu 1 enable BOOL Enabling of the menu can be deactivated following a user command or due to timeout 1 en
2. E w Table 1 List of AHU baselines Air Handling Unit Baselines Developer s Manual 13 MET smart The choice of the starting baseline can be guided by the following considerations e if the AHU has the sole goal of temperature control and differs significantly from the characteristics of layout 3 for example it does not incorporate management of free cooling free heating modulating dampers and inlet fan it may be more practical to start from layout 1 e if the AHU has the dual goals of temperature and relative humidity control and differs significantly from the characteristics of layout 3 for example it does not incorporate management of free cooling free heating modulating dampers and inlet fan it may be more practical to start from layout 2 inall other cases it may be more practical to start from layout 3 4 2 Deriving a new Application project from the baseline Once the starting baseline has been chosen a copy must be made in order to edit it so that a dedicated application can be derived The steps to follow are 1 open the Application project corresponding to the chosen baseline 2 save the application with a new name File menu gt Save project as Refer to the Application user manual for more details 4 3 Making changes to the application Once you have made a working copy of the baseline you can edit the source code in such a way as to introduce all the differences requir
3. Developer s Manual 21 MES smart In the AHU baselines COOL HEAT mode is established by cross referencing the inputs value and dedicated user parameters with the value of an additional user parameter that defines the selectable modes see Figure 5 W aan aa ke vam eS we Wi Gen ee ys EAT gH coma eh Sa dr te X nae Pe a aA vis SE cooL I nee das Sh woh ay AS cle ay a ee GP we na LIMIT ir SB Aap SAC Ran OE HEAT Se ae bee OO St11 LocalMode IN So p a ai hue m C x UE Re MEC Se BR D m X cool MN oe amp oW 4X4 SG eR a WS OX OX X oW Get HEAT MX we dee ud E Se Ow Em mi x I St11 LocalMode G EM X we d Auto St14_LocalMode Ms x ee d A4 oux a ek Aor del m So E eo cmo Xon de os ee CAD Cm ORO R autoHCMode In1 cg e eGR OF e d c Re o8 RIS ju SX Cue Je 04 QS GE EQ We Se i teh Ae car RS Roe die ce vb ZO on SEL fo i UM cea D ACER io VS Re Ue Q8 ap Mae 7 OE A SAL Gap QA Qd td fc a tea r uer dea ach UE mic we cat ARE doe uino di 1 RemoteHCMode 8 E OS Sil oo 4 44 Wee GM oo da f 4 de corde xh eb EO Db d d X ES dm dh eo o LS as 8 Wc dD deca o a LUE cooL Ind ea a OO ae a i a IS a a sg X cw Haw c6 e d Se dX de A a o HEAT In1 v wd dX ouv s e e e C Ue 9 Ceo ck xS d d cec OR ee ux Figure 5 Determining the COOL HEAT operating mode of the air handling unit parameter StOO limits t
4. ON normal operation OFF unit off pre alarm or emergency states o OFF with alarm emergency condition o antifreeze Air Handling Unit Baselines Developer s Manual 29 MET smart SelectState fo rce 6 E n e ra Al a tm l fo reeAntifre eze Se cu rity T rs Ente rOn l l T rs Ente rot l GeneralAlarm Ni AntifreezeSecu Ni T is Exito enera IAI am T rs ExitAntifre ezeSe e T rs Exito n T is Exitoff SelectState Figure 12 Principal states of the AHU baselines in addition to normal operating status ON and OFF status there is also an alarm status and an extraordinary procedure for the antifreeze regime The ON status is in turn a states machine Figure 13 wherein each state represents a strategy to fulfill a goal temperature humidity etc Figure 13 states machine of layout 2 during normal operation of the unit considering for example summer mode COOL the unit can activate the procedures for cooling STEP Cooling priority and dehumidification STEP Dehumidification 30 Air Handling Unit Baselines Developer s Manual MEE smart It may occur that some of the pre alarm emergency situations envisaged by the Air Handling Unit baselines or the strategies to fulfill the control aims are not relevant for our particular application case it may therefore be advisable to eliminate them 5 7 1 Removing a strategy To do this proceed as follows remove the SFC
5. The HMI block manages the application user interface in particular with reference to signalling of unit ON OFF status the operating mode HEAT COOL etc signalling of active services the application menu keys management 1 8 2 Collaborations HMI gathers the following data to view unit ON OFF status from GOAL operating mode from GOAL the set of active services from OUTPUT Data on the activities of the user managed by HMI are used by DIAGNOSTICS with regard to manual alarms reset X APPENDIX Air Handling Unit Baselines Developer s Manual 2 Application project structure The previous chapter describes the architecture of a baseline from an abstract standpoint in this chapter the architecture is explained and described in terms of items of an Application project 2 1 Tasks programs and functional blocks All the blocks described in the previous chapter with the exception of REGULATORS and ACTUATORS translate into programs PROGRAM in accordance with standard IEC61131 3 This means specifically that the exchange of data between blocks occurs by means of global variables whether they are parameters EEPROM Parameters states Status variables Alarms I Os I O mapping or internal variables Global variables The REGULATORS and ACTUATORS blocks are grouped into functional blocks that represent the physical components of the air handling unit created as global variables and invok
6. output to the corresponding digital analog output EXAMPLE 5 4 To implement the requirement expressed in Example 5 3 the following procedure can be adopted 1 in the section Resources gt EEPROM Parameters six new parameters are defined e g 1001 1002 1006 one for each logical input e g 1001 refers to I OutletFanThermal 1002 to I OutletFanFlowSwitch etc the value of which between 1 and 6 identifies the corresponding local digital input Project x m a o Deine FF Resouces FreeSmart EEPROM Parameters nfiguration 8 a B pud objects al Add 3 Remove 53 Recalc 4 amp 9 EEPROM Parameters amp status variables Address Name Display label Device type Application type Default value Min M B A Enums 16390 1001 OutletFanThermalDIPos 1001 Unsigned 8 bit INT 1 1 6 z E 16391 1002 OutletFanFlowSwitchDIPos 1002 Unsigned 8 bit INT 2 1 6 A TimeMode 16392 1003 InletAirFilterPressureSwitchDIPos 1003 Unsigned 8 bit INT 3 1 6 A stoovalues 16393 1004_EconomyDIPos 1004 Unsigned 8 bit INT 4 1 6 9 BIOS Parameters 16394 1005_RernoteHCModeDIPos 1005 Unsigned 8 bit INT 5 1 6 sR EMO 16395 1006 RemoteOFFDIPos 1006 Unsigned 8 bit INT 6 1 6 a 2 in the section Resources gt Menu Prg the new parameters are published in a menu Project x EJ Resources E Project o Definiti E Resources i GA Project o Deiriiene FreeSmart I O configuration Menu 4 amp 9 BIOS Parameters S E Menu P
7. FUNCTION_BLOCK Regulator ON OFF 1 hcMode USINT Direction of regulator if COOL the control action is active until feedback exceeds the setpoint if HEAT it is active until feedback is below the setpoint 2 feedback INT Measurement of the physical quantity subject to the control action read by the regulation probe and utilized as feedback for correlation with the setpoint 3 setpoint INT Target value of the physical quantity subject to the control action 4 diff INT Differential to be added to subtracted from the setpoint for status changeover from OFF to ON if hcMode equals COOL the control action occurs when feedback becomes greater than or equal to setpoint diff if hcMode equals HEAT it occurs when feedback is below or equalto setpoint diff 1 out BOOL ON OFF status of the control action 48 Air Handling Unit Baselines Developer s Manual MEE smart 6 3 3 ProportionalRegulator_t Type Description Inputs Outputs FUNCTION_BLOCK Proportional regulator 1 hcMode USINT Direction of regulator if COOL the control action is active until feedback exceeds the setpoint if HEAT it is active until feedback is below the setpoint 2 feedback INT Measurement of the physical quantity subject to the control action read by the regulation probe and utilized as feedback for correlation with the setpoint 3 setpoint INT Target value of the physical quantity subject to the
8. Goal RegulationProbe PROGRAM selects the probes to be used in the regulation stage one probe for each control goal temperature relative humidity etc The result of the Goal RegulationProbe execution is encoded in the set of status variables dedicated to the regulation probes this means that it is possible to edit or even completely replace the PROGRAM without affecting the rest of the application as long as these status variables are assigned the correct values In AHU baselines the value of one or more user parameters selects the probe to be used from a list see for example Figure 8 Select relative humidity regulation probe among alternative humidity probes MUX RH RegulationProbe Hi01 HumidityProbeSelection _InletAirRelative Humidity _OutletAirRelative Humidity _RoomRelativeHumidity 10 Figure 8 Selection of the relative humidity probe chosen in accordance with the value of parameter Hr01 from the inlet probe the outlet probe and the room probe 5 5 1 Editing regulation probe selection It may be necessary to add or remove a probe from the list of those selectable as the regulation probe To achieve this result proceed as follows e edit the corresponding FBD network in the Goal RegulationProbe PROGRAM so that the probe is included excluded in the selection e edit the definition of the selection parameter specifically to increase decrease the maximum value 24 Air Handling Uni
9. HVAC applications 6 1 1 DelayedStarter t Type FUNCTION BLOCK Description Actuator of a digital output that adds a starting delay and a stopping delay Inputs 1 in BOOL Value to actuate on the digital output prior to application of the delays 2 delayOnStart UDINT Starting delay expressed in milliseconds ms 3 delayOnStop UDINT Stopping delay expressed in milliseconds ms 4 delayBetween UDINT Minimum pause time between successive starts expressed in milliseconds ms Outputs 1 out BOOL Value to actuate on the digital output after application of the delays 6 1 2 StarDeltaStarter t Type FUNCTION BLOCK Description Star delta starting Inputs 1 in BOOL Value to actuate on the digital output 2 lineStarDelay UDINT Star line delay expressed in milliseconds ms 3 starDuration UDINT Star line duration expressed in milliseconds ms 4 starDeltaDelay UDINT Star delta delay expressed in milliseconds ms Outputs 1 line BOOL Line contactor Air Handling Unit Baselines Developer s Manual 45 MET smart 1 star BOOL Star contactor 1 delta BOOL Delta contactor 6 2 Alarms The Alarms library contains the set of management logics of the alarms that are most frequently utilized in the applications 6 2 1 AutoRearmAlarm_t Type FUNCTION BLOCK Description Automatic reset alarm Inputs 1 enable BOOL Enables the alarm condition test If FALSE the bl
10. STEP corresponding to the status to be eliminated e if itis not used in other STEPS remove the ACTION corresponding to the strategy to be eliminated adjust the connections of the SFC diagram removing the transitions to and from the eliminated state It may be necessary to adjust other parts of the Strategy PROGRAM or the application for example to eliminate an alarm or an AHU component that is no longer required Air Handling Unit Baselines Developer s Manual 31 MES smart Eliwell Free Studio Application YD Also delete the associated code TE CoviMode D Tu Entereaiing Dehumidioall 100010 11 Dg Te Cooimode J Te Extent 32 Air Handling Unit Baselines Developer s Manual MELE smart 5 7 2 Adding a strategy Derived applications can manage pre alarm or emergency situations that are not envisaged by the Air Handling Unit baselines and also provide additional strategies to fulfill the control objectives To do this proceed as follows create the SFC STEP corresponding to the state to be added create the ACTION corresponding to the strategy to be added assigning it to the STEP we have just created adjust the connections of the SFC diagram adding the transitions to and from the added state It may be necessary to adjust other parts of the Strategy PROGRAM or the application for example to manage a new alarm variable or a new AHU component Air Handling Unit Baselines Deve
11. control action 4 band INT Dimension of the proportional band if hcMode equals COOL the regulator saturates control action equals 100 when feedback becomes higher than or equal to setpoint band if hcMode equals HEAT when feedback becomes less than or equal to setpoint band leout INT Control action level in parts per thousand 96 6 3 4 ThreeStepsRegulator t Type Description Inputs FUNCTION BLOCK Regulator with three steps 1 hcMode USINT Direction of regulator if COOL the control action is active until feedback exceeds the setpoint if HEAT it is active until feedback is below the setpoint 2 feedback INT Measurement of the physical quantity subject to the control action read by the regulation probe and utilized as feedback for correlation with the setpoint 3 setpoint INT Target value of the physical quantity subject to the control action 4 diff INT Total differential to add to subtract from the setpoint for activation of the three power steps if hcMode equals COOL the first step is activated when feedback becomes greater than or equal to setpoint diff 3 the second step when feedback becomes greater than or equal to setpoint 2 diff 3 and the third step when feedback becomes greater than or equal to setpoint Air Handling Unit Baselines Developer s Manual 49 MET smart Outputs diff if hcMode equals HEAT the first step is activated wh
12. deactivated following a user command or due to timeout 1 back BOOL Returns user to the higher menu level 2 enableCurrentFolder BOOL User command for input in the current submenu i e the submenu in the currentFolder position 6 4 4 SKWLeftDisplayMenu t Type Description Inputs FUNCTION BLOCK Block for navigation from the remote keypad of a menu of items with their values shown on the left hand display 1 itemNumber USINT Total number of items that can be displayed in the menu 2 currentItemValue INT Text identifying current item i e item in currentItem position 3 currentItemMin INT Minimum value of current item i e item in currentItem position 4 currentItemMax INT Maximum value of current item i e item in currentItem position 5 currentItemLabel STRING Text identifying current item i e item in currentItem position 6 currentItemDisplayType USINT Type of value of the current item i e item in currentItem position expressed with constants DISPLAY TEMPERATURE DISPLAY PRESSURE ONE DEC 7 subFolder BOOL If TRUE the menu provides access also to a submenu not included in Air Handling Unit Baselines Developer s Manual 53 MET smart INOUT variables Outputs the itemNumber counter value 8 subFolderName STRING Text identifying the submenu 1 currentItem USINT Current item expressed as a position
13. differentiated from case to case The need frequently occurs to modify the algorithm for calculation of ON OFF status To do this simply edit the FBD network that establishes the value of the status variable state within the Goal State program Air Handling Unit Baselines Developer s Manual 19 MES smart Determine the current state ON STD BY or OFF Priority e 4 Local OFF P When remote off DI is TRUE 2 Local STD BY or time OFF the unit state is forced to OFF 3 Local ON ortime COMFORT ECO 5 2 2 Editing time frame operation Time frame operation can be replaced with personalized operation depending on the needs of the specific application case To do this proceed as follows replace the time frame operation block with a different one which can be appropriately derived from the first one edit add remote redefine the set of user parameters required to save the time frames 20 Air Handling Unit Baselines Developer s Manual E Remove 3 Recalc Name tE00_EnableTimeEvents tE01_TimeProfilemonday 1E02 TimeProfileTuesday 1E03 TimeProfileWednesday 1E04 TimeProfileThursday 1E05 TimeProfileFriday tE06_TimeProfileSaturday tE10_TimeProfile1 Eventi _ Display label tE00 tE01 tE02 tE03 tE04 tE05 tE06 tE10 EB Project Definitions amp Resources MEE smart FreeSmart EEPROM Parameters Device type Boolean Signed 8 bit Signed 8 bit Signed 8 bit Signed 8 bi
14. lt lill Air Handling Unit Baselines Developer s Manual Invensys Controls MET smart Table of contents BC EC EDUECOLOTI dnt d ate aene ter ge ee s E eer tre rere en er es 4 UM PE im aU fa DI ames ena E AE Ce 4 NUN TH HEN 4 VA Eje p E 5 2 1 Abbreviations and Cetin ONS uenti Ee bE quce es PEE ov qui e pede dread 5 3 Baseline architect re senner T 6 S Block diagi ahis e eene a eT ee E Edu eee E ree 6 22 GOALE BIOCEN 7 SU DIAGNOSTICS 0c ol crane ree perme tr errs er nerer scree re Dod Mi m dnd EEE EREN A eee er 8 eA 1M Gh lc ae errr dd a Crit ent ook ORM ble M AMMONIUM 9 3 5 REGULATORS and ACTUATORS blocles ets tetrerediltbeeia b ietes errare tede 11 2 Derived applicallols cocci tipa ap b cde plos ass DD D bU ib xoa i paage 12 4 1 Choosing the BOSE Ia oue tipp n nur UO disp de dd adis i nu ma id 12 4 2 Deriving a new Application project from the baseline 14 4 3 Making changes to the applicati DPlaiso eo me RONDE OU Aa Rtbnrkhda tdi mds ad x DRE ME 14 b Editing the APICAL susp sno ten eis ee ieties bL ER EP Feind etim taU isise eia e tel tei Redde 15 Bt NI OPIPSE US npe UE a Deb ae ne tree See unu caua te ee ee DM PE 18 5 3 COOL HEAT grocer me eo ee eee o to CT 21 BRS Uh saw tenets sag nena ce nce EEEE pee AEE 23 5 5 Reg latiom MN ODER ente eaten tente auto ners tiet ec edd ue ENTE NUI DN NM 24 DMA OIC SU r o E 26 Sorate Gyra ee en ee ene AE M N 29 5 8 Regulation and actuation of QHE
15. of regulator if COOL dynamic differential is greater than 0 when feedback is higher than setpoint if HEAT when feedback is below setpoint 3 maxDifferential INT Maximum value of dynamic differential i e maximum value of differential output 4 feedback INT Measurement of the physical unit to which value of dynamic differential is linked utilized as feedback for correlation with the setpoint 5 setpoint INT Value of the physical unit to which value of dynamic differential is linked for which the differential is cancelled 6 band INT Proportional band of increase of the value of the differential value up to its maximum maxDifferential 1 differential INT Dynamic differential to apply 58 Air Handling Unit Baselines Developer s Manual MET smart 6 6 2 PercentageReduction Type Description Inputs Outputs FUNCTION Percentage reduction of a value expressed in parts per thousand o 1 in INT Value to reduce expressed in parts per thousand o 2 reduction INT Value of the percentage reduction to apply expressed in parts per thousand o Value resulting from the percentage reduction 6 6 3 TimeFrameManager_t Type Description Inputs Outputs FUNCTION_BLOCK Time frame operation 1 enable BOOL Enable time frame operation 1 mode USINT Mode COMFORT ECO or OFF corresponding to the current time frame Air Handling Unit Baselines Developer s Ma
16. recovery unit is fixed at a level specified by STRATEGY Resources ma HeatRecovery Class Pin Name Type Array Init value Attribute 8 VAR EXTERNAL rC01 HeatRecoveryUnitDelta INT No 0 10 VAR_EXTERNAL rC02 HeatRecoveryUnitBand INT No 0 lt il ges DISABLE e F EG i E j If a by pass value has been provided heat recovery unit speed level is set to that value O_HeatRecoveryUnit EG 2 2 52 5 2 5 Ez mode EN ENO Ta al pa O_HeatRecoverUnit Bypass 9 o m Proportional regulation of heat recovery unit speed level regulator Tr EQ oe sss s s ee Proportional Regulator t mode gt EN ENO iat n ENABLE 05 o5 5 5 5 e BODL hcMode out DO HeatRecovenyUnit feedback feedback rCO1 HeatRecoveryUnitDelta gt setpoint rCO2 HeatRecovenyUnitBand band 4 create a global instance of the FUNCTION BLOCK Ij Resources Ea HeatRecovery Bp Global variables Name Type Address Group Array Init value Attribute Description 1 resetAlarmRequest BOOL Auto No FALSE 2 jexemalDamper ExternalDamper_AHUO1 Auto No 0 i External damper regulatoractuator 3 outletFan OutletFan_AHUO1 Auto No 0 Outlet fan regulator actuator 4 heater Heater AHUD1 Auto No Heater regulator actuator 5 cooler Cooler AHUD1 Auto No 0 Cooler regulator actuator B heatRecoveryUnit HeatRecoveryUnit_Custom01 Auto No 0 Heat recovery unit 5 edit the Strategy PROGRAM insert
17. the addition of an item to a menu In this case the changes are limited to the ACTION that defines the menu to be edited In particular it is necessary to e edit the definition of the menu increasing the number of items add the definition of the new item 42 Air Handling Unit Baselines Developer s Manual Thermoregulation menu has 7 uon thermoregulationMenu itemNumber 7 I 7th thermoregulation menu item 5 IF thermoregulationMenu updateCurrentItemValue THEN bWarningKiller sysWriteParINT ADR rC01_HeatRecoveryUnitDelta thermoregulationMenu localValue END IF thermoregulationMenu currentItemValue HA ocu tRecoveryUni tDelta thermoregulationMenu currentItemMin E thermoregulationMenu currentItemMax H thermoregulationMenu currentItemLabel rC01 thermoregulationMenu currentItemDisplayType DISPLAY TEMPERATURE I END CASE thermoregulationMenu enable enableThermoregulationMenu 5 9 2 Adding a menu The user interface for the LCD terminal of an application derived from the AHU baselines may call for the addition of an entire menu To add a menu we need to adjust the SFC diagram to add the STEP corresponding to the new menu and connect it to the parent menu Air Handling Unit Baselines Developer s Manual 43 MEE smart EXAMPLE 5 25 To meet the requirement expressed in Example 5 25 proceed as follows 1 first of all define a new Boolean varia
18. the corresponding LED 7 resourcel BOOL Enabling of resource no 1 depending on application utilized by LocalMainView_t for management of the corresponding LED 8 resource2 BOOL Enabling of resource no 2 depending on application utilized by LocalMainView_t for management of the corresponding LED 9 resource3 BOOL Enabling of resource no 3 depending on application utilized by LocalMainView_t for management of the corresponding LED 10 resource4 BOOL Enabling of resource no 4 depending on application utilized by LocalMainView_t for management of the corresponding LED 11 resource5 BOOL Enabling of resource no 5 depending on application utilized by Air Handling Unit Baselines Developer s Manual 51 MET smart Outputs LocalMainView_t for management of the corresponding LED 12 resource6 BOOL Enabling of resource no 6 depending on application utilized by LocalMainView_t for management of the corresponding LED 13 resource7 BOOL Enabling of resource no 7 depending on application utilized by LocalMainView_t for management of the corresponding LED 1 hotKeyUP BOOL Prolonged press of local display UP key detected 2 hotKeyDW BOOL Prolonged press of local display DW key detected 3 hotKeyESC BOOL Prolonged press of local display ESC key detected 4 hotKeySET BOOL Prolonged press of local display SET key detected 6 4
19. 2 SKWAlarmMenu t Type Description Inputs INOUT variables Outputs FUNCTION BLOCK Block for navigation from remote keypad of an alarms menu 1 totalAlarms USINT Total number of alarms that can be displayed in the menu 2 currentAlarmValue USINT Value of current alarm i e of the alarm in the currentAlarm position O not active 1 active 2 pending manual reset 3 currentAlarmLabel STRING Text identifying current alarm i e the alarm in the currentAlarm position 1 currentAlarm USINT Current alarm expressed as a position in the menu deriving from the navigation operations performed by the user 2 enable BOOL Enabling of the menu can be deactivated following a user command or due to timeout 1 back BOOL Returns user to the higher menu level 52 Air Handling Unit Baselines Developer s Manual MET smart 6 4 3 SKWFolderMenu t Type Description Inputs INOUT variables Outputs FUNCTION BLOCK Block for navigation from remote keypad of a menu providing access to a list of submenus 1 folderNumber USINT Total number of submenus that can be displayed in the menu 2 currentFolderLabel STRING Text identifying the current submenu ie submenu in the currentFolder position 1 currentFolder USINT Current submenu expressed as a position in the menu deriving from the navigation operations performed by the user 2 enable BOOL Enabling of the menu can be
20. HMI library for management of user navigation Figure 16 Day menu has 7 items 0078 dayMenu itemNumber 7 0079 0080 Day menu does not have a subfolder 0081 dayMenu subFolder FALSE CASE dayMenu currentItem OF Day menu 1st item 0086 0 0087 IF dayMenu updateCurrentItemValue THEN 0088 bWarningKiller sysWriteParUSINT ADR tE 0089 END IF 0090 091 dayMenu currentItemValue TO INT tE01_TimePr 0092 dayMenu currentItemMin 1 dayMenu currentItemMax 4 0094 dayMenu currentItemLabel tE01 0095 dayMenu currentItemDisplayType DISPLAY_NUMBE 0096 Day menu 7th item 6 IF dayMenu updateCurrentItemValue THEN bWarningKiller sysWriteParUSINT ADR tE END IF dayMenu currentItemValue dayMenu currentItemMin dayMenu currentItemMax dayMenu currentItemLabel dayMenu currentItemDisplayType END CASE dayMenu enable enableDayMenu enablePrgMenu TO INT tE07 TimePr 1 4 tE07 DISPLAY NUMBE enableDayMenu dayMenu enable dayMenu back Figure 16 two fragments of Act_DayMenu containing the definition of the Day menu and of its 7 items invocation of the SKWRightDisplayMenu_t library block dayMenu variable and management of the enabling flags of the menu itself and the parent memory Prg menu 5 9 1 Adding an item to a menu A frequent variation to the menu for the LCD terminal included in the AHU baselines is
21. PEUS sik outta eb etos qua Gp M VU ipea ida ME Gt bred Sh 36 5 9 LCD t rminal MENU MR S 41 GNE CIIM aaas 45 ON IvsiU o c 45 NUM Ql MN T PU eas 46 suce P jre MR nani Ti 48 6A SMARAM T S 51 65 IVE GAINS REESE Tm 57 O6 Utils e a E DD 58 TSCM CAG ell TT e eaten ete er aera ae CST II CEN eq emt uc NT NN EN I PARAMETERS T E III kI GOAL M eae Il TA DIAGNOSTICS arriere penine iten V VOSTRATEGY oere e E yet errr ere rir eer PEU EU SUM ad VI TO REGULATORS and ACTUATGBRBS ictor ehm eer mh Ranae smit sd irent VIII UNE e sy mp pem I ene X lu PET X 2 Application project SUFUCDUTE oa ie Lore bcc Re HUIR Pa P uA HA PO FUR ape e uai vwd rec gs XI zd Tasks programs and functional bDIOOkSuiu no etre e fseupi e ene aeta fi cH Y XI VAN AME lI cM CT XII 29 ANPUT isere eei E du rene remo NA XII 24 PARAMETER Serene roe e I MU I HER T UC quA NRdU E UMEN UER nU HIMEN XIII 2 Air Handling Unit Baselines Developer s Manual MEE smart aE Ss Ge d ae ae ae eI Ce ae ee DR XIV ZO IBGBKOSTESS ae puces a matt E M MEC M Duden e Em ME XV ZT oT RA EGY f ANART ASAS XVI 26 REGULATORS and ACTUATORS Stars tpeibesdtiea neben epist tetir s tidie Pte wab Eid X
22. RS outputs are used by e ACTUATORS as values to implement on the unit outputs ACTUATORS receives at input possible configurations of actuation logics delegated to USER from PARAMETERS the values of the control actions to implement from REGULATORS The ACTUATORS outputs are used by STRATEGY in order to change the strategy adopted on the basis of the actuators status OUTPUT for physical implementation The situation described is represented schematically in Figure 21 VIII APPENDIX Air Handling Unit Baselines Developer s Manual INPUT Values to Regulators control implement Control action STRATEGY OUTPUT Feedback Regulators configuration Actuators configuration Secondary regulator setpoints PARAMETERS Figure 21 Relationships between REGULATORS ACTUATORS and the other blocks APPENDIX Air Handling Unit Baselines Developer s Manual IX 1 7 OUTPUT 1 7 1 Responsibility The OUTPUT block implements the logical outputs on the physical outputs supplying in particular mapping between logical and physical outputs to which DOs or AOs the logical outputs correspond conversion of the logical value utilized in the application into the corresponding physical value 1 7 2 Collaborations The logical outputs utilized by OUTPUT are calculated by ACTUATORS The physical outputs produced by OUTPUT are external to the system 1 8 HMI 1 8 1 Responsibility
23. T Type of value to show on the right hand display of the LCD terminal 54 Air Handling Unit Baselines Developer s Manual INOUT variables Outputs MES smart expressed with constants DISPLAY TEMPERATURE DISPLAY PRESSURE ONE DEC 7 rightValue INT Value to show on the right hand display of the LCD terminal 8 leftValueType USINT Type of value to show on the left hand display of the LCD terminal expressed with constants DISPLAY TEMPERATURE DISPLAY PRESSURE ONE DEC 9 leftValue INT Value to show on the left hand display of the LCD terminal 10 leftText STRING Text to show on the left hand display of the LCD terminal if leftValueType equals TEXT 11 generalAlarm BOOL If TRUE the unit is in OFF status from alarm and generalAlarmMsg is shown on the display 12 generalAlarmMsg STRING Message to show on display when generalAlarmis TRUE 13 alarm USINT Alarms status SKWMainView t for management of the corresponding LED If 0 this means no active alarm if 1 at least one active alarm if 2 all active alarms are pending manual reset 14 economy BOOL Activation of Economy mode utilized by LocalMainView t for management of the corresponding LED 15 currentTimeProfile USINT Current time frame operation profile 16 fanSpeedControl BOOL If TRUE management of fans speed from LCD keypad is enabled 17 fanSpeed USINT Fans speed if fanSpeedControl is TRUE
24. Tasks 4 Timed A input_DILMapping fa Goal State ly fa Goal Mode fa Goal Setpoint fa Goal RegulationProbe fa Diagnostics fa Strategy Air Handling Unit Baselines Developer s Manual 17 MES smart 5 2 ON OFF status The Goal State PROGRAM determines the ON OFF status more precisely the status can be OFF STD_BY or ON of the AHU and the activation status of specific operating modes such as ECO Economy mode The result of the Goal State execution is encoded in the state and economy status variables this means that it is possible to edit or even completely replace the PROGRAM without affecting the rest of the application as long as these status variables are assigned the correct values In the AHU baselines the unit status is determined by analyzing the inputs and user parameters dedicated to this purpose in accordance with a priority encoded in the Goal State PROGRAM code refer to Figure 2 0003 Determine the current state ON STD BY or OFF When remote off DI is TRUE Wheridime events are enabled l l the unit state is forced to OFF these take priority over local settings SEL wo us s 28 4 4 Te Jah Je SEL n RemoteOff e timeEventsEnabled 5 Ind SHO LocalState 5 InO oos os s D Ind a be hee deos MUX ie es A timeState 5 K ee Pom e d BE E T STD BY 10 Figure 2 Determination of the AHU status starting from the rem
25. VII 27 OUTPUT m pP XVII XVII 2 1O FMI M 3 Air Handling Unit Baselines Developer s Manual MET smart 1 Introduction The purpose of this manual is to guide the developer in the use of Eliwell FREE Studio and Eliwell s Air Handling Unit AHU Baselines to build a dedicated application for Air Handling Units 1 1 FREE Studio The AHU Baselines are compatible with FREE Studio 2 0 or later versions 1 2 EULA To install FREE Studio and the Air Handling Unit Baselines you must accept the terms of the user license Read the End User License Agreement EULA carefully before continuing End User License Agreement is also available on the website http www eliwell it content aspx id 4533 4 Air Handling Unit Baselines Developer s Manual MEE smart 2 Glossary DEVELOPER designer developer with knowledge of one or more IEC61131 3 standard programming languages FREE Applicaton user USER end user typically using FREE Device This person is not expected to be able to compile code The USER must have access to adequate documentation RESPONSIBILITY blocks functionality description COLLABORATIONS interactions between Baseline Architecture blocks 2 1 Abbreviations and definitions A H U Air Handling Unit Application Device Connection abbreviations of FREE Studio Application FREE Device and Free Connection respectively Software suit
26. a strategy to fulfill the cooling request otherwise exclusively the cooler is utilized The strategy chosen by the STRATEGY block determines the enabling of the various components of the unit and the data to be used in their control such as the setpoints to follow and the field measurements feedback to use EXAMPLE 3 7 For example the cooling strategy enables the cooler regulator by sending it the value read by the thermoregulation probe and the value of the temperature to be reached temperature setpoint in COOL mode Vice versa heating coil regulation is disabled Refer to Appendix Architecture for further information on the relationships between the STRATEGY block and the other blocks Air Handling Unit Baselines Developer s Manual 9 MES smart 3 4 1 Software form in the AHU baselines Working with an AHU baseline the STRATEGY block is constituted by the program of the same name written in SFC language The STRATEGY block is a model of the unit s state machine defining the actions to be performed i e the strategy to adopt for each machine state the possible transitions between states and the conditions in which they occur The chosen programming language SFC allows efficient translation of this state machine the strategies correspond to ACTIONS of the SFC program implemented in FBD language each strategy contains an FBD network for each unit component the transitions
27. ableMenu BOOL Menu access rights acquired user has entered the password correctly 2 back BOOL Returns user to the higher menu level 6 4 7 SKWRightDisplayMenu t Type Description Inputs FUNCTION BLOCK Block for navigation from the remote keypad of a menu of items with their values shown on the right hand display 1 itemNumber USINT Total number of alarms that can be displayed in the menu 2 currentItemValue INT Text identifying current item i e item in currentItem position 3 currentItemMin INT Minimum value of current item i e item in currentItem position 4 currentItemMax INT 56 Air Handling Unit Baselines Developer s Manual MEZ smart Maximum value of current item i e item in currentItem position 5 currentItemLabel STRING Text identifying current item i e item in currentItem position 6 currentItemDisplayType USINT Type of value of current item i e item in currentItem position expressed with constants DISPLAY TEMPERATURE DISPLAY PRESSURE ONE DEC 7 subFolder BOOL If TRUE the menu provides access also to a submenu not included in the itemNumber count value 8 subFolderName STRING Identification text of submenu INOUT 1 currentItem USINT variables Current item expressed as a position in the menu deriving from the navigation operations performed by the user 2 enable BOOL Enabling of the menu can be de
28. activated following a user command or due to timeout Outputs 1 enableSubFolder BOOL User command for entry into the submenu 2 back BOOL User command to return to higher menu level 3 updateCurrentItemValue BOOL User command to edit value of current item i e item in currentItem position 4 localValue INT Value to assign to current item i e item in currentItem position when updateCurrentItemValue is TRUE 6 5 Thermodynamics The Thermodynamics library contains calculation functions of physical units of importance in the development of HVAC applications Air Handling Unit Baselines Developer s Manual 57 MES smart 6 5 1 CalcEnthalpy Type FUNCTION Description Approximate calculation of specific enthalpy Inputs Outputs 6 6 Utils The Utils library contains generic blocks of utilities that do not fall logically into any of the foregoing libraries 1 temperature INT Temperature in tenths of a degree Celsius C 10 2 humidity INT Relative humidity percentage in parts per thousand 960 Jjaltitude INT Height above sea level in hundreds of metres m 107 Specific enthalpy kJ kg 107 6 6 1 DynamicSetpoint_t Type Description Inputs Outputs FUNCTION_BLOCK Block for management of a dynamic differential to apply to a setpoint 1 enable BOOL Enabling of dynamic differential If FALSE the differential output equals 0 2 hcMode USINT Direction
29. alue END IF heatRecoveryUnitMenu currentItenValue rC01 HeatRecoveryUnitDelta heatRecoveryUnitMenu currentItemMin 500 heatRecoveryUnitMenu currentItemMax 999 heatRecoveryUnitMenu currentItemLabel rC01 heatRecoveryUnitMenu currentItemDisplayType DISPLAY TEMPERATURE Heat recovery unit menu 2nd item 1 IF heatRecoveryUnitMenu updateCurrentItemValue THEN bWarningKiller sysWriteParINT ADR rC02 HeatRecoveryUnitBand heatRecoveryUnitMenu localValue END IF heatRecoveryUnitMenu currentItemValue heatRecoveryUnitMenu currentItemMin 1 heatRecoveryUnitMenu currentItemMax 255 heatRecoveryUnitMenu currentItemLabel rC02 heatRecoveryUnitMenu currentItemDisplayType DISPLAY TEMPERATURE rC 2 HeatRecoveryUnitBand END CASE heatRecoveryUnitMenu enable enableHeatRecoveryUnitMenu enableHeatRecoveryUnitMenu heatRecoveryUnithMenu enable enableServiceMenu heatRecoveryUnitMenu back T 44 Air Handling Unit Baselines Developer s Manual MEE smart 6 Libraries The baselines for AHUs make use of various block libraries FUNCTION and FUNCTION BLOCK These libraries can be utilized effectively in the development of applications derived from the baselines This chapter contains a detailed description of the blocks contained in the various libraries 6 1 Actuators The Actuators library contains the set of actuation logics that are most frequently utilized in
30. and settings from PARAMETERS of Economy mode dynamic setpoint input from INPUT and its settings from PARAMETERS automatic mode changeover input from INPUT and its settings from PARAMETERS regulation probe selection parameters from PARAMETERS The result of the GOAL calculation is propagated towards other items of the architecture in particular towards DIAGNOSTICS unit ON OFF status STRATEGY unit ON OFF status request type and setpoint to follow regulation probes HMI ON OFF status of the unit and request type The above situation is represented schematically in Figure 18 ON OFF status Request mode Remote mode ON OFF status Request mode l Setpoint input Regulation probes Economy mode Dynamic Setpoint STRATEGY Local mode Setpoint Time bands Dynamic Setpoint configuration PARAMETERS Figure 18 Relationships between GOAL and the other blocks IV APPENDIX Air Handling Unit Baselines Developer s Manual 1 4 DIAGNOSTICS 1 4 1 Responsibility The DIAGNOSTICS block evaluates the presence of anomaly conditions in the unit and manages activation and deactivation reset of the alarms 1 4 2 Collaborations DIAGNOSTICS makes use of unit ON OFF status from GOAL diagnostic digital inputs from INPUT for detection of anomalous conditions in the unit for example tripping of a thermal protection analog inputs from INPUT for analog diagnostics e g for d
31. ating this task to the downstream blocks Refer to Appendix Architecture for further information on the relationships between the GOAL block and the other blocks 3 2 1 Software form in AHU Baselines Working with an AHU Baseline the GOAL block is composed of a series of programs written in FBD programming language the names of which start with Goal The results of the GOAL block are made available to the remaining parts of the application as global data in the Global shared Variables folder Air Handling Unit Baselines Developer s Manual 7 MET smart 3 3 DIAGNOSTICS block The DIAGNOSTICS block evaluates the presence of fault conditions in the unit and controls activation and deactivation reset of the alarms The tests performed by the DIAGNOSTICS block include evaluation of the digital diagnostic inputs for detection of unit fault conditions checking of values transmitted by probes in order to detect absent or faulty probes evaluation of analog inputs associated with safeties pre alarms The DIAGNOSTICS block is responsible for detecting error conditions but not for remedying them Refer to Appendix Architecture for further information on the relationships between the DIAGNOSTICS block and the other blocks 3 3 1 Software form in the AHU baselines Working with an AHU baseline the DIAGNOSTICS block is constituted by the program of the same name written in FBD language The result
32. atus of all regulators from REGULATORS the status of the actuators of interest to the strategy from ACTUATORS VI APPENDIX Air Handling Unit Baselines Developer s Manual The strategy adopted is translated into commands towards REGULATORS ACTUATORS The above situation is represented schematically in Figure 20 ON OFF status Request mode Feedback Regulators control REGULATORS Active alarms DIAGNOSTICS Strategy configuration PARAMETERS Figure 20 Relationship between STRATEGY and the other blocks APPENDIX Air Handling Unit Baselines Developer s Manual VII 1 6 REGULATORS and ACTUATORS 1 6 1 Responsibility The values assumed by the physical outputs of the controller are established by the group of REGULATORS and ACTUATORS blocks which bring together the logic of regulation and of outputs actuation respectively The REGULATORS and ACTUATORS blocks collectively perform the task of fulfilling the requests expressed by the STRATEGY block in terms of setpoints or percentage values 1 6 2 Collaborations REGULATORS receives at input the regulator setpoints from STRATEGY feedback information for regulation from INPUT for example temperature probes pressure probes etc possible configurations of regulation logics delegated to USER from PARAMETERS control data commands for activation by pass etc from STRATEGY The REGULATO
33. ble to enable the menu enableHeatRecoveryUnitMenu 2 create a new STEP HeatRecoveryUnitMenu connecting it as the child of ServiceMenu ServiceMenu N enableThermoregulati enableAlarmConfigura enableHeatRecoveryU enablePrgMenu Thermoregulat N AlarmConfigur N HeatRecoveryU N enableServiceMenu enableServiceMenu enableServiceMenu 2 SemiceMenu gt 2SemiceMenu gt 2 SemiceMenu gt 3 edit Act ServiceMenu so that it manages an extra item corresponding to the new submenu 4 create and implement the ACTION Act HeatRecoveryUnitMenu inserting the definition of the menu and its items parameters rc01 and rc02 in doing this it may prove useful to create and invoke a suitable block of the SmartHMI library for navigation management Ta SKWHMI El Act HeatReco 0001 0002 0003 0004 0005 0006 0007 0008 0009 0010 0011 0012 0013 0014 0015 0016 0017 0018 0019 0020 0021 0022 0023 0024 0025 0026 0027 0028 0029 0030 0031 0032 0033 0034 0035 0036 0037 0038 Heat recovery unit menu has 2 items heatRecoveryUnitMenu itemNumber 2 Heat recovery unit menu does not have a subfolder heatRecoveryUnitMenu subFolder FALSE CASE heatRecoveryUnitMenu currentItem OF Heat recovery unit menu lst item IF heatRecoveryUnitMenu updateCurrentItemValue THEN bWarningKiller sysWriteParINT ADR rC01_HeatRecoveryUnitDelta heatRecoveryUnitMenu localV
34. cated controlling a simple AHU composed of e ON OFF dampers asingle fan outlet electric heater cooler The only goal pursued by layout 1 is to maintain the temperature of the controlled room within a given range of values EXT external temperature IN inlet air temperature OUT outlet air temperature y F A H U 0 1 AF antifreeze temperature 12 Air Handling Unit Baselines Developer s Manual MET smart Layout 2 extends layout 1 to include e humidifier e post heater the component used for the dehumidification process This layout has the further goal of maintaining the relative humidity of the controlled room within a given range of values EXT external temperature IN inlet air temperature y IN H inlet air relative humidity OUT outlet air temperature A H U O 2 AF antifreeze temperature Pre H pre heating temperature Layout 3 is an application dedicated to the control of a complete AHU which includes all the elements present in the previous layouts and also asecond fan inlet modulating control of dampers for free cooling free heating heatrecovery unit EXT external temperature A H U O 3 EXTH external relative humidity IN inlet air temperature IN H inlet air relative humidity OUT outlet air temperature AF antifreeze temperature Pre H pre heating temperature amp gt gt
35. correspond to SFC program TRANSITIONS implemented in ST language 10 Air Handling Unit Baselines Developer s Manual MEE smart 3 5 REGULATORS and ACTUATORS blocks The values assumed by the physical outputs of the controller are established by the set of REGULATORS and ACTUATORS blocks which combine the regulation and outputs actuation logics respectively Collectively the REGULATORS and ACTUATORS blocks perform the task of fulfilling the requests that the STRATEGY block expresses in terms of setpoints or percentage values Refer to Appendix Architecture for further information on the relationships between REGULATORS and ACTUATORS blocks and the other blocks 3 5 1 Software form in the AHU baselines The REGULATORS and ACTUATORS blocks are grouped into functional blocks that represent the physical components of the air handling unit Each strategy determines the inputs of all the blocks and causes their execution Air Handling Unit Baselines Developer s Manual 11 MES smart 4 Derived applications This section describes the operations to be performed to derive a dedicated application starting from the Eliwell AHU baselines 4 1 Choosing the baseline The first decision to make concerns the AHU baseline from which to start the choice mainly depends on the type of AHU that the application must control Table 1 lists the main differences between the AHU baselines Layout 1 is an application dedi
36. disabled Subsequently Figure 10 the eventual request for resetting of the alarms received via the user interface is managed 26 Air Handling Unit Baselines Developer s Manual ILE smart 0002 Be m Fulfill reset alarm request e y wo y wow x5 MOVE TE MN resetAlarmRequest resetAlarm resetAlarmRequest Figure 10 Management of the alarms reset request Finally Figure 11 all the alarm conditions monitored by the application are analyzed one at a time 0005 Clock error clockError Auto Rear mAlarm_t enableDiagnostics gt enable alarm sysClockError 2 condition Er ClockError 0006 Test inlet air temperature probe inletAirTemperatureProbeError ProbeError t enableDiagnostics 5 enable alarm Inlet amp irTemperature 5 probe Er Inlet amp AirTemperatureProbeError Figure 11 Er ClockError encodes clock error status this is a manually reset alarm i e it requires an explicit reset by the user and it monitors the status of sysClockError system variables Er_InletAirTemperatureProbeError encodes the inlet air temperature probe error status If the logics that determine the value of one or more alarms already provided in the baselines are edited it is not necessary to edit the parts of the application that use said alarms However the most frequent modifications of the Diagnostics PROGRAM are associated with the addition or rem
37. e diagnostic digital input I_FireAlarm corresponding to the smoke detector FreeSmart Extended I O Mapping Name Variable Type Description AIE1 _PreheatingTemperature INT AIE1 analogue input AIE2 AntifreezeTemperature INT AIE2 analogue input AIE3 INT AIE3 analogue input AIE4 INT AIE4 analogue input AIES INT AIE5 analogue input DIE1 InletAirFilterPressureSwitch BOOL DIE1 digital input DIE2 HumidifierAlarm BOOL DIE2 digital input DIE3 BOOL DIE3 digital input DIE4 BOOL DIE4 digital input nice noo RICE eieital innit 3 encode activation and resetting of the alarm with a simple FBD network and the assistance of the blocks available in the Alarms library 28 Air Handling Unit Baselines Developer s Manual 5 7 Fire alarm la Strateoy E Act Evaluates 0001 Evaluate general alarm fireAlarm 0002 forceGeneralAlarm Er ThermoregulationProbeError 0003 Er Inlet irTemperatureProbeError 0004 Er Outlet irTemperatureProbeError 0005 Er_ExternalTemperatureProbeError 0006 Er_PreheatingTemperatureProbeError Er RoomTemperatureProbeError Er RelativeHumidityRegulationProbeError Er Inlet irRelativeHumidityProbeError Er RoomRelativeHumidityProbeError Er OutletFanThermal larm Er OutletFanFlowSwitch larm Er FireAlarm gt 0 Strategy MEE smart The Strategy PROGRAM defines the state machine of the application The principal states Figure 12 are
38. ecify the speed analog output FreeSmart Local I O Mapping Variable Type Description O_ElectricHeater1 stResistance BOOL DOL4 digital output O ElectricHeater2ndResistance BOOL DOLS digital output O ElectricHeater3rdResistance BOOL DOLG digital output O HeatRecoveryUnit T INT AOL1 analogue output INT AOL2 analogue output INT AOL3 analogue output O CoolingVvalve INT AOL4 analogue output define the parameters required for regulation of the rotary heat recovery unit which in this example we assume to be limited to a a setpoint on the difference between the expulsion temperature and ambient air temperature b the proportional band beyond which the regulator saturates speed equal to 100 FreeSmart EEPROM Parameters 3 Remove Recalc Name Display label Device type Application type Default value Min t rC01_HeatRecoveryUnitDelta reo Signed 16 bit INT 20 500 999 rC02 HeatRecoveryUnitBand rC02 Signed 16 bit INT 15 1 255 Air Handling Unit Baselines Developer s Manual 39 MEE smart 3 create the FUNCTION_BLOCK dedicated to control of the heat recovery unit in order to manage the following operating modes a disabled in this case the rotary heat recovery unit speed is null and the 1 HeatRecoveryUnit output is set to 0 b enabled the speed of the rotary heat recovery unit is subject to proportional regulation controlled by parameters rc01 and rc02 C fixed speed the speed of the rotary heat
39. ed by the specific application circumstances For an introduction to the high level structure of the application refer to Chapter 3 Even though there are no limitations to the type and number of changes that can be made Chapter 5 describes the most frequent cases illustrating the methods of proceeding and showing some practical examples 14 Air Handling Unit Baselines Developer s Manual MEE smart 5 Editing the application This section describes the most frequent actions that must be taken on the baselines and provides indications on how to edit the application providing numerous practical examples 5 1 1 I O static configuration It is frequently necessary to map the physical I O inputs and outputs of the hardware that implements the application on the logical I O i e on the symbols utilized in the application to refer to the input and output values EXAMPLE 5 1 Working on an application for Smart derived from layout 2 we decide to move the digital input corresponding to a humidifier alarm from the extended I O to the local one Application allows editing of the I O configuration in table form in the section Resources gt I O Mapping of the development environment simply arrange the symbolic names in the grids in the way that best adapts to the specific application case in order to fulfill this requirement EXAMPLE 5 2 Considering Example 5 1 to achieve the required result we can follow this
40. ed within the PROGRAM STRATEGY All the programs that make up the baseline are executed by the Timed task with the exception of those dedicated to the HMI significant only for Smart Project x El Project 2 Definitions Resources AHU_LayoutO3 Project B C Programs H a Diagnostics H a Goal Mode 33 Goal_ReaulationProbe H a Goal Setpoint H a Goal State T5 SKWwHMI 1 SmartHMI h Strategy 23 Function blocks 3 Cooler AHUO3 13 ExternalD amper_AHUO3 13 Heater AHUO3 Ha HeatRecoveryLnit AHLIO3 12 Humidifier AHU03 EHE InletFan_4HU03 13 OutletFan_A4HUO3 Ea PostHeater AHUOS 23 Functions a Global variables a Global shared Tasks 4 Timed H Goal State fd Goal Mode fa Goal Setpoint fd Goal ReaulationProbe fd Diagnostics Strategy 43 Background fd SmartHMl fy SKwHMI Boot Init e APPENDIX Air Handling Unit Baselines Developer s Manual XI 2 2 Libraries The baseline application makes use of numerous library blocks subdivided into separate libraries depending on their role regulators in the regulators library actuators in the actuators library etc The number of blocks present in a library may increase at the same time as the need to implement new logics for new applications The DEVELOPER can alter the behaviour of an application significantly with simple replacements of a block with an analogous block present in the library Library x Name Type Description i Hystere
41. en feedback becomes less than or equal to setpoint diff 3 the second step when feedback becomes less than or equal to setpoint 2 diff 3 and the third step when feedback becomes less than or equalto setpoint diff 1 stepl BOOL ON OFF status of the first power step 2 step2 BOOL ON OFF status of the second power step 3 step3 BOOL ON OFF status of the third power step 6 3 5 TwoStepsRegulator t Type Description Inputs Outputs FUNCTION BLOCK Regulator with two steps 1 hcMode USINT Direction of regulator if COOL the control action is active until feedback exceeds the setpoint if HEAT it is active until feedback is below the setpoint 2 feedback INT Measurement of the physical quantity that is subject to the control action read by the regulation probe and utilized as feedback for correlation with the setpoint 3 setpoint INT Target value of the physical quantity subject to the control action 4 diff INT Total differential to add to subtract from the setpoint for activation of the two power steps if hcMode equals COOL the first step is activated when feedback becomes greater than or equal to setpoint diff 2 the second step when feedback becomes greater than or equal to setpoint diff if hcMode equals HEAT the first step is activated when feedback becomes less than than or equal to setpoint diff 2 and the second step when feedback becomes less than o
42. ere previously assigned to the local digital inputs are defined differently for example as status variables section Resources gt Status variables Project x Ej Resources Project 2 Definiti Resources E oec EL c FreeSmart Status Variables L3 Configuration c B Freesmart GEB Modbus objects fig Add 3 Remove amp Recalc 4 amp 9 EEPROM Parameters 3 amp status variables Address Name Display label Device type Application type Unit I A Enums 8970 OutletFanThermal Boolean BOOL z vira 8971 OutletFanFlowSwitch Boolean BOOL Al TE ds 8972 _InletAirFilterPressureSwitch Boolean BOOL A St DValues 8966 Economy Boolean BOOL 4 amp 9 BIOS Parameters 8965 _RemoteHCMode Boolean BOOL E B Menu Prg 8969 Remoteoff Boolean BOOL ER state Mode Vile ES x Jii 5 a new PROGRAM is created in FBD language with the name Input DILMapping comprising an FBD network for each logical input each FBD network selects the local digital input to be used on the basis of the value read by the corresponding parameter 0001 SUB J DXXMUX 1001_OutletFanThermalDIPos 5 K _OutletF anThermal a o pui o EEn n 1002_OutletF anFlowSwitchDIP os K _OutletF anFlowSwitch et g 00 _ 2 DIL1 10 met Sees coe ce a ls NN n DIL3 12 DIL4 13 DILS 14 6 the new PROGRAM is assigned to the Timed task as the first PROGRAM to execute the rest of the application remains unchanged Ej
43. es IEC Application PLC Application PLC PROGRAM application developed in compliance with IEC61131 3 industrial control programming standards by means of the Application development environment tool to download to the target using Application or Device Target device Target name given to the FREE Smart or FREE Evolution programmable controller or instrument HMI Human Machine Interface Graphic interface developed with Free Studio for FREE Smart and SKP SKW terminals Instance object of a predefined class of objects function block template etc IEC Language programming language developed in compliance with IEC61131 3 e g FBD SFC BIOS menu BIOS factory set BIOS parameters menu The Bios cannot be edited Smart abbreviation of FREE Smart Evolution abbreviation of FREE Evolution Studio abbreviation of FREE Studio The software suite described in this document Tab or form The work environment is divided into sections or panels Each panel may in turn be subdivided into forms or tabs e g Resources tab Note Many definitions and abbreviations are standard information technology and or PLC terms and are not listed here For example a Function is a standard term Other terms such as Block will be described in the relevant headings Air Handling Unit Baselines Developer s Manual 5 MES smart 3 Baseline architecture This section describes the high level software structure the architecture of E
44. etection of a missing or faulty probe configuration of alarms activation and resetting logics from PARAMETERS e g a delay interval user command for manual alarms reset from HMI The status active or inactive of the alarms is transmitted by DIAGNOSTICS to HMI for signalling of the active alarms and the facility to reset them STRATEGY for execution of exceptional procedures for faults management The diagram in Figure 19 summarizes the DIAGNOSTICS collaborations APPENDIX Air Handling Unit Baselines Developer s Manual V Active alarms Manual alarms reset ON OFF status STRATEGY Diagnostic DI Al for analog diagnostics Active alarms Alarms Configuration PARAMETERS Figure 19 Relationships between GOAL and the other blocks 1 5 STRATEGY 1 5 1 Responsibility The STRATEGY block establishes the strategy to use to achieve the control goal In detail this consists of evaluating the existence of requests to be fulfilled assigning priority to pending requests choosing the strategy to use to fulfill the request from among the various possible strategies managing the request on the basis of the chosen strategy 1 5 2 Collaborations STRATEGY receives the following information as an input ON OFF status of the unit the user requests and relative setpoints from GOAL diagnostic information that calls for a centralized fault management procedure from DIAGNOSTICS the st
45. he selectable modes and defines the sources local mode AUTO mode remote mode to be used in the calculation The same PROGRAM also resolves on a preliminary basis AUTO mode Figure 6 selectable by the user in AUTO mode the mode changeover from COOL to HEAT and vice versa occurs without any action of the user on the basis of the value of a probe that can be selected by means of a parameter autoHCMode in o HEAT Ind lo JEBOE In1 t20_ChangeOverSelectProbe K hi _ExternalT emperature lo InletAirTemperature 1 Outlet amp irTemperature 2 oft oos SP20 T HeatingSetpoint 5 t22_ChangeOverDifferentialHeat SP10_T_CoolingSetpoint 5 t21_ChangeOverDifferentialCool Figure 6 Resolution of AUTO mode in this case the COOL HEAT operating mode of the user is established by evaluating the value of the probe selected by means of user parameter St20 with reference to an interval of values neutral zone established by a combination of various user parameters the lower limit is set by SP20 St22 the upper limit by SP10 St21 22 Air Handling Unit Baselines Developer s Manual MEE smart 5 4 Setpoints The Goal_Setpoint PROGRAM calculates the setpoints relative to all the control goals managed by the application The result of Goal Setpoint execution is encoded in the set of status variables dedicated to setpoints this means that it i
46. in the menu deriving from the navigation operations performed by the user 2 enable BOOL Enabling of the menu can be deactivated following a user command or due to timeout 1 enableSubFolder BOOL User command for entry into the submenu 2 back BOOL Returns user to the higher menu level 3 updateCurrentItemValue BOOL User command to edit the value of the current item i e item in currentItem position 4 localValue INT Value to assign to the current item i e item in currentItem position when updateCurrentItemValue is TRUE 6 4 5 SKWMainView t Type Description Inputs FUNCTION BLOCK Block for management of LEDs and detection of prolonged pressing of keys hot key function of the local Smart display in basic display mode 1 state USINT Unit ON OFF status utilized by SKWMainView t for management of stand by LED and view of OFF text on display 2 stateSource USINT Source of ON OFF status 0 local 1 remote 2 time frame operation 3 mode USINT COOL HEAT AUTO operating mode utilized by SKWMainView t for management of the corresponding LEDs 4 modeSource USINT Source of operating mode COOL HEAT AUTO 0 local 1 remote 2 auto 5 modeSelection USINT Selectable operating modes COOL HEAT AUTO for editing by the user with remote keypad 0 COOL only 1 HEAT only 2 COOL and HEAT 3 COOL HEAT and AUTO 4 remote setting 6 rightValueType USIN
47. ing in each strategy a new FBD network dedicated to control of the heat recovery unit 40 Air Handling Unit Baselines Developer s Manual MEE smart ExternalTemperature 5 5 9 LCD terminal menu The SKWHMI PROGRAM is responsible for defining the user menu for the LCD terminal The menu tree is represented by an analogous construct in SFC language see Figure 14 wherein each STEP represents a submenu and each TRANSITION represents the possible transitions between them Figure 14 Structure of the menu for the LCD terminal from the main menu you can access the set menu to edit the setpoints and display active alarms or the Prg menu which in turn allows access to various submenus for parameter programming procedures Each transition is associated with a Boolean variable that represents the enabling of a single submenu see Figure 15 for example these variables are assigned values in the ACTIONS associated with the STEPS of the diagram and at each instant only one of them must be TRUE Air Handling Unit Baselines Developer s Manual 41 MET smart enableSetMenu SetMenu N enablePrgMenu PrgMenu N Figure 15 transition in the set menu is enabled when the enableSetMenu variable is TRUE transition in the Prg menu is enabled when the enablePrgMenu variable is TRUE The ACTIONS of the SKWHMI PROGRAM define the submenus and their items utilizing the blocks of the Smart
48. ion of the DEVELOPER The DEVELOPER can easily take action on the definition of parameters editing of the default value the range of permissible values etc or add new ones APPENDIX Air Handling Unit Baselines Developer s Manual XIII 2 5 GOAL Working with an AHU baseline the GOAL block is composed of a series of programs written in FBD language the names of which start with Goal The results of the GOAL block are made available as global data to the remaining parts of the application in the folder Global shared gt Variables 0001 ELI NIME EN Determine the temperature setpoint in cooling Select between alternative source setpoints 5 o Deeonomy amp SP10 T CoolingSetpoint In0 I d Soa 5 75 0 UU e SP11 T CoolingSetpointEco 5 In1 6 WOR og 8 hk de d 9 T T_CoolingSetpoint Add to Subtract from the selected setpoint the following term s dynamicSetp oi ntCool Dynamic Setpoint_t dS00_EnableDynamicSetpoint gt enable differential a S L cooL hcMode dS03 DynamicDifferentialCool maxDifferential 9 d dm 3 ExternalTemperature 5 feedback dS05 SetpointDynamicDifferentialCool setpoint dS01 BandDynamicDifferentialCool band 2 5 1 Possibilities of action of the DEVELOPER The GOAL block is useful for the following DEVELOPER tasks replacement of a given logic for example
49. l The DEVELOPER can easily act on the entire HMI block The HMI logic is isolated from the rest of the application in such a way as to facilitate possible porting on Evolution APPENDIX Air Handling Unit Baselines Developer s Manual XVII GEME 73 diall SINCERT PONA Vp o A ISO ger Roy Eliwell Controls Srl Via dell Industria 15 Z Paludi 32010 Pieve d Alpago BL Italy Telephone 39 0 437 986 111 Fax 39 0 437 989 066 Sales 39 0 437 986 100 Italy 39 0 437 986 200 other countries saleseliwell invensys com Technical helpline 39 0 437 986 250 eliwell freeway invensys com www eliwell it o vo gt N E o pe o o z e o j ISO 9001 9MA10043 06 11 Copyright Eliwell Controls s r l 2010 2011 All rights reserved XVIII APPENDIX Air Handling Unit Baselines Developer s Manual
50. liwell baselines introducing information that aids understanding of the starting application with the result of facilitating the work of a developer who intends to work on the software to create a dedicated application 3 1 Block diagram The block diagram in Figure 1 represents the architecture of the Baselines The single items in the diagram and their connections are described in the following headings The entire architecture is described in detail in Appendix Architecture with descriptions of the RESPONSIBILITY of the individual blocks and the relationships called Collaborations between the GOAL block and the other blocks g STRATEGY REGULATORS ACTUATORS m i PARAMETERS Figure 1 High level software structure 6 Air Handling Unit Baselines Developer s Manual EEE smart 3 2 GOAL block The GOAL block establishes the aims that are to be pursued in the unit control strategy Specifically the data resulting from the GOAL block are unit ON OFF status COOL HEAT summer winter unit operating mode energy saving mode activation status ECO mode setpoints to follow measurements feedback to be used for regulation deriving from the choice of regulation probes The GOAL block is required to summarize these data starting from the different possible sources which include parameters and digital and analog inputs The GOAL block is not concerned with whether or how the goals can be achieved deleg
51. ller outputs in order to mirror the differences in the physical actuators of which the unit is composed Provided the FUNCTION BLOCK interface remains unchanged it will not be necessary to alter the rest of the application 36 Air Handling Unit Baselines Developer s Manual MEE smart EXAMPLE 5 19 For example consider an application derived from layout 1 from which it differs due to the presence of an electric heater with resistances in the number of 3 in place of the heating coil with modulating valve We can proceed as follows 1 edit the application outputs the baseline uses an analog output to regulate the electric heater while the derivative application uses three digital outputs one for each resistance DOL3 BOOL DOL3 digital output DOL4 O_ElectricHeater stResistance BOOL DOLA digital output DOLS O ElectricHeater2ndResistance BOOL DOLS digital output DOLE BOOL DOLS digital output AOL1 INT AOL1 analogue output 2 change implementation of the Heater AHUO1 block so that it translates the same commands received from STRATEGY into actions on three digital outputs specifically a when the electric heater is not enabled the three digital outputs are FALSE Bowe ow Rod ME EG eg OR x od R D mede OUElechicHesteriaResistance o so DISABLE 5 S a a O_ElectricHeater2ndResistance gt NEL a ea ee ae ere as Rw r O_ElectricHeaterSrdResistance b when
52. loper s Manual 33 EXAMPLE 5 18 To meet the requirement expressed in Example 5 17 proceed as follows 1 edit Act EvaluateSecurities so that it assigns a value to a flag dedicated to the fire alarm forceFireAlarm 0012 Er OutletFanFlowSwitch larm gt 0 0013 0014 Evaluate fire alarm 0015 forceFireAlarm Er_FireAlarm gt 0 0016 0017 Evaluate antifreeze security 2 insert a new STEP FireAlarm connected in parallel to the other main states but in the first position because it has higher priority 3 as a condition of the entry transition to the FireAlarm STEP select forceFireAlarm as an exit condition select a new TRANSITION corresponding to the denied value of orceFireAlarm 4 create a new ACTION Act FireAlarm and assign it to the FireAlarm STEP 34 Air Handling Unit Baselines Developer s Manual MES smart Immediately stop the post heater postHeater Immediately stop the outlet fan outletFan Air Handling Unit Baselines Developer s Manual 35 MET smart 5 8 Regulation and actuation of outputs The components of the AHU are modelled within the AHU baselines with the FUNCTION BLOCKS utilized by the Strategy PROGRAM in the execution of the various strategies 5 8 1 Editing the regulation of an AHU component In developing an application derived from the AHU baselines it is frequently necessary to modify the regulation and or actuation of the contro
53. nables the alarm condition test If FALSE the block output is set to 0 alarm not active 2 reset BOOL Alarms reset command If TRUE and the alarm is in the pending manual reset status it transits to non activation status block output is 0 3 condition BOOL Alarm condition active when condition equals TRUE l alarm USINT Alarm status 0 not active 1 active 2 pending manual reset 6 2 5 ProbeError_t Type Description Inputs Outputs FUNCTION BLOCK Probe error 1 enable BOOL Enables the alarm condition test If FALSE the block output is set to 0 alarm not active 2 probe INT Value read by the probe whose operation presence must be checked lelarm USINT Alarm status 0 not active 1 active Air Handling Unit Baselines Developer s Manual 47 MES smart 6 3 Regulators The Regulators library contains the set of regulation logics that are most frequently utilized in HVAC applications 6 3 1 Hysteresis t Type FUNCTION BLOCK Description Inputs Outputs Hysteresis 1 clockwise BOOL Direction of hysteresis if FALSE the direction is counter clockwise if TRUE it is clockwise 2 in INT Value to correlate with the thresholds given by parameters lo and hi 3 lo 2 INT Hysteresis lower threshold value 4 hi INT Hysteresis upper threshold value 1 out BOOL Hysteresis status 6 3 2 OnOffRegulator_t Type Description Inputs Outputs
54. nual 59 APPENDIX APPENDIX Air Handling Unit Baselines Developer s Manual 1 Block diagram The block diagram shown in Figure 17 represents the high level software structure of a baseline See also the same architecture diagram in Figure 1 HMI GOAL ke Lr 2 2 a z p STRATEGY REGULATORS ACTUATORS 3 T IL PARAMETERS 00 ETERS Figure 17 NENNEN umma level software structure The following headings provide detailed descriptions of the individual items of the diagram and their connections 1 1 INPUT 1 1 1 Responsibility The INPUT block translates physical inputs into logical inputs utilized by the application Specifically the block mapsthe physical inputs on the corresponding logical inputs i e INPUT determines which Dls or Als correspond to which symbolic names utilized in the application converts the physical value of the inputs into the logical value utilized in the application Il APPENDIX Air Handling Unit Baselines Developer s Manual 1 1 2 Collaborations The physical inputs read by INPUT are external to the application architecture The logical inputs produced by INPUT are utilized by GOAL with regard to remote setting of the operating mode and activation of Economy mode DIAGNOSTICS with regard to digital diagnostic inputs thermal protections flow switches pressure switches etc and analog diagnostics probe error high low pressure etc STRATEGY and REGULATORS
55. ock output is set to 0 alarm not active 2 condition BOOL Alarm condition active when condition equals TRUE Outputs 1 alarm USINT Alarm status 0 not active 1 active 6 2 2 DelayAutoRearmAlarm t Type FUNCTION BLOCK Description Delayed activation and automatic reset alarm Inputs 1 enable BOOL Enables the alarm condition test If FALSE the block output is set to 0 alarm not active 2 condition BOOL Alarm condition active when condition equals TRUE 3 delay UDINT Alarm activation delay expressed in milliseconds Outputs 1 alarm USINT Alarm status 0 not active 1 active 6 2 3 DelayManualRearmAlarm t Type FUNCTION BLOCK Description Delayed activation alarm with manual reset Inputs 1 enable BOOL Enables the alarm condition test If FALSE the block output is set to 0 alarm not active 46 Air Handling Unit Baselines Developer s Manual Outputs IMER smart 2 reset BOOL Alarms reset command If TRUE and the alarm is in pending manual reset status it transits to the non activation status the block output is 0 3 condition BOOL Alarm condition active when condition equals TRUE 4 delay UDINT Alarm activation delay expressed in milliseconds 1 alarm USINT Alarm status 0 not active 1 active 2 pending manual reset 6 2 4 ManualRearmAlarm t Type Description Inputs Outputs FUNCTION BLOCK Manual reset alarm 1 enable BOOL E
56. ote digital OFF input from local state user parameter St10 and from the information derived from time frame operation if enabled Moreover Goal_State is responsible for determining whether Economy mode is active or not refer to Figure 3 0004 Determine whether the unit shall operate in economy mode or not timeEventsEnabled 5 Se we 2X2 wA xe I Economy gt timeState Eco Figure 3 Activation of Economy mode depends on the dedicated digital input and the current value of the machine mode derived from time frame operation if enabled 18 Air Handling Unit Baselines Developer s Manual MEE smart The same PROGRAM initially establishes the current time frame so that it can utilize the associated information see Figure 4 Determine if time events are enabled timeEventsEnabled ClockError tE00_EnableTimeEvents Look up the time event table to determine current unit state timeFrameManager f TimeFrameManager t enable mode timeState timeEventsEnabled Figure 4 Enabling time frame operation depends on the availability of the system clock and the value of parameter tE00 the current time frame is established by using the library block TimeFrameManager t 5 2 1 Editing the algorithm that determines ON OFF status The data to consider to establish the air handling unit s ON OFF status and the priority to assign to said data can be significantly
57. oval of an alarm which can impact on the alarm management delegated to the downstream parts of the application in particular to the Strategy PROGRAM Air Handling Unit Baselines Developer s Manual 27 MES smart 5 6 1 Adding an alarm If a derived application envisages signalling management of an alarm condition that is not provided for in the AHU baselines an alarm must be added its signalling must be managed and the any reactions of the controller must be implemented EXAMPLE 5 13 Assume for example we want to add the management of a fire alarm read on a digital input connected to a smoke detector To manage a new alarm condition the following procedure is necessary create a new alarm variable in the section Resources gt Alarms manage in a new FBD network of the Diagnostics program activation and reset of the alarm that has just been added if so required manage the active alarm condition in the Strategy PROGRAM with an adequate reaction safety measures procedure EXAMPLE 5 14 Returning to Example 5 14 the requirement can be fulfilled with the following modifications 1 in the Resources gt Alarms section add a new alarm variable Er FireAlarm oer LILISANIN ICAS rieniaisian Livu Licey an neater wonna aran gt Extended Er_HumidifierAlarm ErB1 Humidifier alarm Remote z n Er FireAlarm Er05 Fire alarm amp Alarms Help 2 in the Resources gt I O Mapping section add th
58. priority among inputs that determine the operating mode with an alternative present in the library extension or simplification of the logical networks connected to pins of the blocks for example to add a condition to enable time frame operation introduction of new factors for calculation of the setpoints to follow XIV APPENDIX Air Handling Unit Baselines Developer s Manual 2 6 DIAGNOSTICS Working with an AHU baseline the DIAGNOSTICS block is constituted by the program of the same name written in FBD language The results of the DIAGNOSTICS block are made available as alarm variables grouped therefore in the folder Global shared gt Alarms Each network of the Diagnostics program is responsible for assigning a value to an individual alarm 0005 Clock error l clockError AutoRearmAlarm t enableDiagnostics 5 enable alarm sysClockError condition Er ClockError Test inlet air temperature probe inletAirT emperatureProbeError ProbeError_t enableDiagnostics 5 enable alarm Inlet amp irTemperature 5 probe Er InletAirTemperatureProbeError 2 6 1 Possibilities of action of the DEVELOPER The DEVELOPER can easily modify the logics for detection and resetting of alarms for example adding or removing delays making such logics parametric requesting manual resetting of a specific alarm etc add the managemen
59. procedure 1 open the section Resources gt I O Mapping gt Local 2 choose the digital input to be used let us assume DIL3 and edit the contents of the corresponding cell by entering the symbolic name of the humidifier alarm 1 HumidifierAlarm 3 open the section Resources gt I O Mapping gt Extended and remove the symbolic name of the humidifier alarm from its prior position 4 the logical input replaced in point 2 I ElectricHeaterThermal can be assigned to an unused digital input of the expansion 5 1 2 Dynamic configuration of the I O It may be required to make the mapping of the physical I O on the logical I O depend on the value of one or more user parameters in such a way as to be editable also after the development stage e g at the time of installation EXAMPLE 5 3 Working on an application for Smart derived from layout 1 that makes use of all and exclusively the local digital inputs DIL1 6 we want the allocation of these inputs to the corresponding logic symbols to be parametric Air Handling Unit Baselines Developer s Manual 15 MET smart To achieve this result we must introduce another software level as a new PROGRAM assigned to the Timed task which on the basis of the configuration parameter values assigns to each digital input the values read by the corresponding digital input by the corresponding probe and in the opposite sense assigns the value of each logical
60. r equalto setpoint diff 1 stepl BOOL ON OFF status of the first power step 2 step2 BOOL ON OFF status of the second power step 50 Air Handling Unit Baselines Developer s Manual MEE smart 6 4 SmartHMI The SmartHMI library contains blocks for the construction of user interfaces for Smart and the relative terminals SKW SKP 6 4 1 LocalMainView t Type Description Inputs FUNCTION BLOCK Block for management of LEDs and detection of prolonged pressing of keys hot key function of the local Smart display in basic display mode listate USINT Unit ON OFF status utilized by LocalMainView t for management of the stand by LED and view of the OFF text on the display 2 remoteState BOOL If TRUE ON OFF status is determined by a remote setting and its display illumination of the stand by LED or message OFF shown on the display is intermittent 3 mode USINT COOL HEAT operating mode utilized by LocalMainView t for management of the corresponding LEDs 4 remoteMode BOOL If TRUE COOL HEAT operating mode is determined by a remote setting and its display illumination of COOL or HEAT LED is intermittent 5 economy BOOL Activation of Economy mode utilized by LocalMainView t for management of the corresponding LED 6 timeIsEnabled BOOL Activation of time frame operation utilized by LocalMainView t for management of
61. r handling unit Each strategy determines the inputs of all the blocks and causes their execution 2 8 1 Possibilities of action of the DEVELOPER The DEVELOPER has considerable freedom of action in REGULATORS and ACTUATORS for example to replace regulation and actuation logics e g with other library blocks insert additional logic on the regulator block pins replace the physical inputs with parametric inputs or vice versa build complex actuators composed of several actuator blocks although managed as a single actuator by STRATEGY coordinated by a logical block that is concerned with subdividing requests originating from STRATEGY over different actuators Note that is certain cases it may be necessary or more appropriate to modify STRATEGY to manage a complex actuator on that level 2 9 OUTPUT Mapping between logical outputs and physical outputs is performed statically with the Application O Mapping table Conversion of the logical value utilized within the application into the corresponding physical value is performed by the BIOS on the basis of the values of the I O configuration parameters 2 10 HMI Considering Smart the HMI block is partly automated local application menu and partly implemented in dedicated IEC61131 3 PROGRAMS that are responsible for signalling of ON OFF status of the operating mode and of the active services of the keys management and management of the menu for the remote termina
62. ra i ER State Mode Display label ro Bl fal Add EJ Remove Up Down ER Setpoint vera ER Thermoregulation Name Description ER Dynamic setpoint 1001_OutletFanThermalDIPos Outlet fan thermal DI position E Time frames I002 OutletFanFlowSwitchDIPos Outlet fan flow switch DI position ER Alarm configuration 3 a ER Fans 1003 InletAirFilterPressureSwitchDIPos Inlet air filter pressure switch DI position col I004 EconomyDIPos Economy DI position 1005 RemoteHCModeDIPos Remote mode DI position B Current state mode 1006 RemoteOFFDIPos Remote OFF DI position E Active regulation probe v 3 in the section O Mapping gt Local generic names are assigned to the variables corresponding to the local digital inputs Project x EJ Resources EE Input DILMap E Peoi gt O Definiti E Resources j EE E e FreeSmart Local I O Mapping Ei Fans p Name Variable Type Description H ER 1 0 configuration AILS ExternalTemperature INT AILS analogue input Bo o DILI DILI BOOL DIL digital input E Active regulation probe pit2 DIL2 BOOL DIL2 digital input ER Active setpoint DIL3 DIL3 BOOL DIL3 digital input BE 1 0 Mapping DIL4 DIL4 BOOL DILA4 digital input E piLs DILS BOOL DILS digital input Be Remote piL amp DILG BOOL _ DIL digital input J alarms IDoL1 O_ExternalDamper BOOL DOL1 digital output 16 Air Handling Unit Baselines Developer s Manual MEE smart 4 the symbols that w
63. s of the DIAGNOSTICS block are made available as alarm variables grouped in the Global shared Alarms folder Each network of the Diagnostics program is responsible for assigning a value to an individual alarm 8 Air Handling Unit Baselines Developer s Manual MEE smart 3 4 STRATEGY block The STRATEGY block is responsible for choosing the strategy to use to achieve the aims determined by the GOAL block In detail this consists of evaluating on the basis of the readings from the field and the aims calculated by the GOAL block whether there are requests to be fulfilled or pre alarm or emergency situations that must be remedied assigning priority to pending requests EXAMPLE 3 5 For example in the AHU baselines it may occur that neither temperature nor humidity goals are fulfilled In this situation the STRATEGY block decides which of the two goals is to be pursued first selecting the strategy to use to fulfill the request from among the various possible strategies EXAMPLE 3 6 Still considering the AHU baselines a cooling request can be fulfilled by the use of a cooler or in certain conditions by means of the free cooling mechanism which is more economical The STRATEGY block evaluates the necessary conditions for activation of free cooling notably ambient air temperature must be within a clearly defined range of values if these conditions are fulfilled free cooling is adopted as
64. s possible to edit or even completely replace the PROGRAM without affecting the rest of the application as long as these status variables are assigned the correct values In AHU baselines the setpoint is first selected from a list of possible alternative sources and thereafter it is added to one or more differentials see for example Figure 7 0001 Determine the temperature setpoint in cooling Select between alternative source setpoints EEEEASM JJ Aen T CoolingSetpoint 5 o jeeonomy E SP10 T CoolingSetpoint 5 Ind ewok ee te mw ae ee ae SP11 T CoolingSetpointEco 5 In1 FUELS E dar Eo udo i E Add to Subtract from the selected setpoint the following term s dyna m icS etp ointCo o 1 DynamicSetpoint t dS00_EnableDynamicSetpoint 2 enable differential GNE LE ES COOL hcMode dS03 DynamicDifferentialCool maxDifferential DEN DO ExternalTemperature feedback dS05 SetpointDynamicDifferentialCool setpoint dS01 BandDynamicDifferentialCool band Figure 7 Calculation of the temperature setpoint in COOL mode starting from the value of parameter SP10 or SP11 depending on whether or not Economy mode is active the only differential applied is the dynamic differential on external temperature if enabled by parameter dS00 Air Handling Unit Baselines Developer s Manual 23 MET smart 5 5 Regulation probes The
65. sis t Function block Hysteresis i OnOffRegulator_t Function block ON OFF regulator i ProportionalRegulator_t Function block Proportional regulator i ThreeStepsRegulator t Function block 3 steps regulator i TwoStepsRegulator t Function block 2 steps regulator 2 3 INPUT The conversion of the physical value into the corresponding logical value utilized within the application is performed by the BIOS on the basis of the values of the I O configuration parameters Mapping between physical inputs and logical inputs is performed statically with the Application I O Mapping table Name Variable Type Description ALI Pmbe Tr INT lL analogue input 0 AIL2 Probe Ts INT AIL2 analogue input AIL3 DynamicSetpoint INT AIL3 analogue input AIL4 INT AIL4 analogue input j AILS Probe Ta INT AIL5 analogue input 1 DIL1 SFan Overheating BOOL DIL1 digital input DIL2 RFilt_PressureSwitch BOOL DIL2 digital input DIL3 SFan_FlowSwitch BOOL DIL3 digital input Ls DIL4 RemoteOff BOOL DIL4 digital input DIL5 RemoteStandBy BOOL DIL5 digital input DILG Economy BOOL DILG digital input DOL1 SFan BOOL DOL digital output DOL2 EDamper BOOL DOL2 digital output DOL3 BOOL DOL3 digital output w XII APPENDIX Air Handling Unit Baselines Developer s Manual 2 3 1 Possibilities of action of the DEVELOPER The DEVELOPER can take action in the context of I O mapping with the utmost simplicity 2 4 PARAMETERS The parameters are made available to the application b
66. t Signed 8 bit Signed 8 bit Signed 16 bit Application type Default value BOOL USINT USINT USINT USINT USINT USINT INT False S El AHU Custom03 Project H E Programs 3 Function blocks EA Cooler AHUO3 EA EsteralDamper AHUO3 i Heater AHUOS Ea HeatRecoveryUnit AHUO3 Ea Humidifier AHUO3 m InletFan_AHUO3 Ea DutletFan AHUO3 E PostHeater AHUO3 TimeFrameManager5Prof_t Functions E Global variables E Global shared E Tasks 5 3 COOL HEAT mode Array Initvalue No yesterday USINT No VAR INPUT VAR OUTPUT VAR EXTERNAL VAR EXTERNAL enable BOOL No mode USINT No sysClock TypeDataTime No 1E01 TimeProfileMon USINT No ELSIF time gt tE34_TimeProfile3Event3 AND time lt t mode tE35 ModeProfile3Event3 4th time frame ELSIF time gt tE36 TimeProfile3Event4 THEN tE37 ModeProfile3Event4 Profile 4 OFF 24 hours a day 4 mode OFF Profile 5 COMFORT 24 hours a day 5 mode COMFORT END CASE ELSE Time frame management disabled mode OFF END IF The Goal Mode PROGRAM determines the COOL HEAT mode of air handling unit operation The result of Goal Mode execution is encoded in the hcMode status variable this means that it is possible to edit or even completely replace the PROGRAM without affecting the rest of the application as long as these status variables are assigned the correct values Air Handling Unit Baselines
67. t Baselines Developer s Manual MEE smart Select relative humidity regulation probe among alternative humidity probes FreeSmart EEPROM Parameters Z Recalc Name Displaylabel Devicetype Application type Defaultvalue Min tr22_T_UpperLimit tr22 Signed 16 bit INT 500 SP20_T_HeatingSetpoin 999 123 T UpperLimitBand tr23 Signed 16 bit INT 15 tr24_PostheatingDelay tr24 Unsigned 32 bit UDINT tr25_PostheatingBand tr25 Signed 16 bit INT 15 Hr10_EnableDehumidification Boolean 5 5 2 Setting the regulation probe As the limit case of the requirement expressed in heading 5 5 1 it may be required to establish the regulation probe releasing it from the selection parameter which can therefore be removed To achieve this result proceed as follows e simplify the corresponding FBD network in the Goal_RegulationProbe PROGRAM which becomes a simple assignment remove the selection parameter Air Handling Unit Baselines Developer s Manual 25 MET smart Inlet air relative humidity probe is the regulation probe 5 6 Diagnostics The Diagnostics PROGRAM establishes the alarms activation status i e the status of all the variables defined in the Resources gt Alarms section The Diagnostics PROGRAM first assesses whether or not to enable diagnostics otherwise all the alarms are deactivated see Figure 9 When unit is OFF diagnostics is skipped Figure 9 If the AHU status is OFF diagnostics is
68. t of new alarm conditions APPENDIX Air Handling Unit Baselines Developer s Manual XV 2 7 STRATEGY Working with an AHU baseline the STRATEGY block is constituted by the program of the same name written in SFC language The STRATEGY block is a model of the unit s state machine which defines the actions to be performed i e the strategy to adopt for each machine state the possible transitions between states and conditions in which they occur The chosen programming language SFC allows efficient translation of this state machine the strategies correspond to ACTIONS of the SFC program implemented in FBD language each strategy contains an FBD network for each unit component the transitions correspond to SFC program TRANSITIONS implemented in ST language 2 7 1 Possibilities of action of the DEVELOPER With reference to the above in terms of DEVELOPER actions STRATEGY can manage pre alarm situations or emergency situations that are not envisaged by the Air Handling Unit baselines and also provide additional strategies to fulfill the control goals modify the individual strategies already provided for in terms of actions on the REGULATORS and ACTUATORS blocks XVI APPENDIX Air Handling Unit Baselines Developer s Manual 2 8 REGULATORS and ACTUATORS The REGULATORS and ACTUATORS blocks are grouped together in functional blocks which represent the physical components of the ai
69. the power level of the electric heater is set if the level is 33 only the digital output corresponding to the first resistance is TRUE if the level is 66 two digital outputs are TRUE if the level is 100 all three digital outputs are TRUE Air Handling Unit Baselines Developer s Manual 37 MES smart If a by pass value has been provided the number of active resistances depends on that value 38 Air Handling Unit Baselines Developer s Manual MEE smart 5 8 2 Adding a component to the AHU In developing a dedicated application derived from a baseline it may be necessary to manage a physical component of the AHU that is not envisaged by the baseline EXAMPLE 5 20 Consider the case of an application derived from layout 1 from which it differs due to the presence of a heat recovery unit Management of the new component calls for definition of an additional FUNCTION_BLOCK that is responsible for translating the commands received from STRATEGY into operations on the outputs editing of the Strategy PROGRAM so that the new component is managed in all operating modes in each strategy EXAMPLE 5 21 Considering Example 5 20 we can proceed as follows il Name DOL4 DOLS DOLG AOL1 AOL2 AOL3 AOL4 Ea Add Address 16404 16405 define the logical output to control the heat recovery unit which it is assumed to be of the rotary type and that requires the controller to sp
70. with regard to regulators feedback 1 2 PARAMETERS 1 2 1 Responsibility The PARAMETERS block provides the application with the configuration parameters supplied by USER 1 2 2 Collaborations The PARAMETERS outputs are utilized by GOAL setpoints time frames etc DIAGNOSTICS alarms configuration REGULATORS regulators configuration e ACTUATORS actuators configuration 1 3 GOAL 1 3 1 Responsibility The GOAL block establishes the aims that the unit controller must pursue Specifically the data resulting from the GOAL block are unit ON OFF status COOL HEAT summer winter operating mode of the unit energy saving mode activation status ECO mode setpoints to follow measurements feedback to use in regulation deriving from the choice of regulation probes The GOAL block is necessary to summarize these data starting from the different possible sources which include parameters and digital and analog inputs The GOAL block is not concerned with whether or how the goals can be achieved delegating this task to the downstream blocks APPENDIX Air Handling Unit Baselines Developer s Manual III 1 3 2 Collaborations To achieve this aim GOAL makes use of local setting from PARAMETERS and remote setting from INPUT of the ON OFF stratus and the requested operating mode setpoint from PARAMETERS time frames and their activation from PARAMETERS activation from INPUT
71. y means of their definition in the Application EEPROM Parameters tables and potentially Status variables Address Name Display label Device type Application type Default value Min Max 16450 LModeOFF Md 800 BOOL Tme 16451 LModeStandBy Md 01 BOOL BOOL False 16400 SpHeat HEOO INT INT 200 16500 ULimTs HE01 INT INT 500 16501 ULimTsDiff HE02 INT INT 20 16401 SpAntifreeze AFOO INT INT 70 16550 SFanFlowSwitchDelay SF00 DWORD DWORD 60 16552 SFanOnStartDelay SF 1 DWORD DWORD 15 16554 SFanOnStopDelay SF02 DWORD DWORD 5 16556 SFanBetweenDelay SF03 DWORD DWORD 60 16460 EcoDiffHeat ECOD INT INT 10 15470 DynSetpointDiffHeat dS504 INT INT 50 16471 EnableDynSetpoint dso7 BOOL BOOL False 16600 EnableTimeEvents tE00 BOOL BOOL False 15501 TimeProfileMonday tE01 SINT SINT 0 0 3 16602 TimeProfileTuesday tE02 SINT SINT 0 3 15503 TimeProfileWednesday tEU3 SINT SINT 0 0 3 16604 TimeProfileThursday tE04 SINT SINT 0 0 3 16605 TimeProfileFriday tE05 SINT SINT 0 0 3 16606 TimeProfileSaturday tE06 SINT SINT 0 0 3 v lt f gt With regard to Smart considering the absence of a parameters database on the target unlike Evolution the PARAMETERS block can include a dedicated IEC61131 3 PROGRAM that is responsible for validating the values of the application parameters This logic must be isolated from the remainder of the application in such a way as to facilitate possible porting on Evolution 2 4 1 Possibilities of act

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