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1. Fig 1 1 The master unit connected to the supervisor network acts as the gateway and coordinates the functions of the 5 slave units connected in the LAN Each device has its own user terminal and display Master slave network with terminals and displays shared by the master master maximum 5 slaves MPXPRO A A i 1 ERI 2 slave 3 ea 4 slave 5 Fig 1 m The master unit connected to the supervisor network acts as the gateway and coordinates the functions of the 5 slave units connected in the LAN The user terminal connected to the master unit can be used to navigate inside the local network and modify and or display the settings and variables of all the slave units connected RS485 supervisor network ja TT j IT 5 mexo UIII mexrol TN ED MPXPRO N CHL UI es O QUI master 1 eli 2 na n Fig 1 n Connection of the master unit to the RS485 serial supervisor network Each master unit can act as a gateway to the supervisor for any 5 slave units connected MPXPRO 030220186 rel 2 0 07 02 2008 1 4 Models The controllers options and accessories of the MPXPRO series are available in the following versions Basic models Code Master
2. 3 i Ea ie 7 5 1 24 153 1 2 HQ ig DO imag E H z is 12 Q oa oO 193 3 D ge TOLD ils s 2 1 D s7 13 3 Go dIA re a iL EB lt 30 29 IDEES 2 53S e t igVee N Tita lt The default configuration envisages e Group 1 pre configured as NTC cabinet temperature probes S1 NTC outlet probe Sm S2 NTC defrost probe Sd S3 NTC inlet probe Sr e Group 2 pre configured as NTC probes auxiliary temperatures digital inputs S4 NTC superheated gas temperature probe only configured on the models with valve driver included see advanced parameter Fd S5 digital input DI2 can be configured function not configured see basic parameter A5 e Group 3 pre configured as pressure probe S6 ratiometric evaporation pressure probe only configured on the models with valve driver included see advanced parameters P3 U6 L6 FE e Group 4 pre configured as NTC probe S7 function not configured see Assigning the advanced functions of the probes p 42 e Group 5 pre configured as DI5 digital input function not configured see basic parameter A12 For further information see the following sections e Basic functions Temperature probe configuration p 21 e Basic functions Digital input configuration p 22 e Advanced functions Analogue inputs p 35 e Advanced Assigning the advanced functions of the probes p 37 Power
3. Defrost call Local Network Sd lt dt1 _ Start Local defrost Start Network defrost Sd gt dt1 _ Local defrost not performed Dripping and post dripping only Tab 5 s MPXPRO 030220186 rel 2 0 07 02 2008 29 C dP1 and dtl Maximum defrost duration Defrost events p 30 A 13 Enable end defrost signal for time out p 58 Defrost temperature Sd ChE Fig 5 d A dC Defrost time base p 53 A dC Defrost time base p 53 C A4 A5 A10 A11 A12 Digital input configuration p 22 C A6 Solenoid valve configuration during external alarm immediate or delayed p 52 Table of d values day settings d days 0 no days 1 7 Monday to Sunday 8 Monday to Friday 9 Monday to Saturday 10 Saturday amp Sunday ll Every day A Power defrost p 56 30 dP1 Maximum defrost duration Code UOM Min Max Def dP1 min I 240 45 Depending on the type of defrost set dP1 can have the following values e Defrost by time dP1 normal defrost duration e Defrost by temperature dP1 maximum defrost duration with alarm generated Note To change the time base see advanced parameter dC d8 Alarm bypass time after defrost and door open Code UOM Min Max Def d8 min 0 240 30 This indicates the time in minutes that the high temperature alarm signals is disabled for at the end of a defrost or when the door is opened if the multifunction input is
4. This is used to set the type of gas refrigerant used in the system The table on the side shows the types of gas possible and the associated PH values CAREL guarantees perfect compatibility of the CAREL PV electronic expansion valve with the refrigerants shown below Contact CAREL if installing EV valves in systems that use refrigerants not listed in the table EV P1 EEV Main Select model of electronic valve Code UOM Min ax Def PI 0 2 0 MPXPRO can control two different models of electronic expansion valve each with the specific type of optional expansion board Parameter P1 is used to set the model installed PI Model of valve Model of valve 0 Valve not used I PWM MX20PPWM 2 CAREL E2V MX20PSTP P3 EEV PID Superheat set point Code UOM Min Max Def P3 K 0 0 25 0 10 0 This is used to set the reference superheat value for the control of the electronic valve It does not determine the actual superheat value but rather the desired value MPXPRO 030220186 rel 2 0 0702 2008 45 Type of refrigerant PH Refrigerant Compatibility with CAREL EV R22 2 R134a G 3 R404a 4 R407c i 5 R410a 6 R507a a 7 R290 8 R600 9 R600a 10 R717 Il R744 G 12 R728 13 R1270 14 R417a Tab 6 g A PF EEV ADV passi apertura valvola p 51 In a network of instruments Phr sho
5. This represents the alarm activation delay after exceeding the MOP threshold When the alarm is activated the following occur e Message MOP shown on the display e The buzzer is activated The alarm features automatic reset when the evaporation pressure falls below the threshold PM1 PM4 0 gt MOP alarm disabled PM4 EEV MOP MOP function delay when starting control Code UOM Min Max Def PM4 S 0 240 2 This represents the MOP protection activation delay following the last activation of the solenoid valve PM5 EEV MOP Enable close solenoid local valve for MOP alarm Code UOM Min Max Def PM5 flag 0 1 0 This allows the local or network solenoid valve based on the configuration of the system see parameter 17 to be closed upon activation of the MOP alarm If the expansion valve 0 steps is closed completely during MOP status before the activation of the alarm the solenoid valve configured is also closed LSA Low suction temperature alarm The low suction temperature alarm prevents the return of liquid refrigerant to the compressors When the suction temperature falls below the threshold the alarm is activated after the set delay closing the electronic valve and the local and or shared solenoid valve if configured The alarm is reset when the suction temperature exceeds the set threshold plus the hysteresis Reset is automatic for a maximum of three times in a two hour
6. This represents the time that is added to the maximum defrost duration dP1 and dP2 for the auxiliary evaporator Example ddP 0 increased duration not active in Power defrost Example 2 If ddt gt 0 and ddP gt 0 then Power Defrost mode is enabled for both temperature and duration In this mode any defrost calls when the controller is in night status or due to the RTC settings td1 to td8 with attribute P 1 modify the default settings The end defrost threshold temperature becomes dt1P dt1 ddt The maximum duration of defrost becomes dP1P dP1 ddP This effect is naturally extended to the second evaporator dt2 and dP2 6 6 Fan speed modulation 6 6 1 List of parameters Code Parameter Speed modulation F5 Fan cut off temperature hysteresis 1 C F6 Maximum fan speed F7 Minimum fan speed F8 Fan peak speed time F9 Select fan control with PWM output1 2 with phase cutting speed control MPXPRO board models p 10 6 6 2 Speed modulation MPXPRO can manage a maximum of 3 analogue outputs this depends on the code of the board used 1 0 to 10 Vdc output on the optional boards 2 PWM outputs 12V on the main board The modulation of the evaporator fan speed is one of the functions of these outputs and in particular based on the standard factory configuration modulation is managed using the 0 to 10 Vdc analogue output on some optional boards This unit configuration can only be chang
7. Disposal of the product the product is made up of metal parts and plastic parts In reference to European Union directive 2002 96 EC issued on 27 January 2003 and the related national legislation please note that WEEE cannot be disposed of as municipal waste and such waste must be collected and disposed of separately 2 The public or private waste collection systems defined by local legislation must be used In addition the equipment can be returned to the distributor at the end of its working life when buying new equipment 3 The equipment may contain hazardous substances the improper use or incorrect disposal of such may have negative effects on human health and on the environment 4 The symbol crossed out wheeled bin shown on the product or on the packaging and on the instruc tion sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and that it must be disposed of separately In the event of illegal disposal of electrical and electronic waste the penalties are specified by local waste disposal legislation wo If the appliance is used in a way that is not described by the manufacturer the specified level of protec tion may be affected MPXPRO 030220186 rel 2 0 0702 2008 Contents 1 INTRODUCTION 7 TE MPXPRO scaricare 7 COMPONEN esrus E i e 7 1 3 Functional diagrams scsssssssssssescssssesesssssesessssesssssesssnssesssnssssusnsssssnasseussss
8. RS485 Relay Pt1000 EV Driver PWM 0 10 Vdc PWM Slave amp RTC Driver output outputs MX20M00E00 Master Y__ 5R 8 2HP 16 8 8 _ MX20S00E00 Slave N 5R 8 2HP 16 8 8 MX20S10E00 Slave N ZR 8 0 16 0 8 present N optional Not available Tab 1 a Full optional models Code Master RS485 Relay Pt1000 EV Driver PWM 0 10 Vdc PWM Slave amp RTC Driver output outputs MX20M21E00 _ Master Y___ 5R 8 2HP 16 8 8 Y 2 MX20S21E00 Slave N 5R 8 2HP 16 8 8 y 2 MX20S31E00 Slave N 3R 8 0 16 0 8 Y 2 Y present N optional Not available Tab 1 b Boards with E2V driver option pre installed Code Master RS485 Relay Pt1000 EV Driver PWM 0 10 Vdc PWM Slave _ amp RTC Driver output outputs MX20M25E00 __ Master Y 5R 8 2HP 16 8 8 X Y Y 2 MX20S25EO0 _ Slave N__ 5R 8 2HP 16 8 8 Y Y Y 2 MX20M24E00 _ Master Y___ 5R 8 2HP 16 8 8 Y Y Y 2 MX20S24EO0 _ Slave N__ BR 8 2HP 16 8 8 y Y Y 2 Y present N optional Not available Tab 1 c Options and accessories Code Description ROOUGC300 MPXPRO terminal green LED full optional IR commissioning ROOXGC300 MPXPRO display green LED full optional IR commissioning ROOUG6300 MPXPRO terminal green LED no options without IR without commissioning RO
9. This function is used to perform a number of daily defrosts by setting the first defrost only and then indicating the number of defrosts throughout the day the instrument automatically creates a schedule of defrosts to be performed at regular intervals d1S d2S Number of daily defrosts Code UOM Cat Min Max Def diS 0 14 0 d2S 0 14 0 Defines the number of defrosts performed each day starting from programmed events td1 and td2 respectively according to the following table dis d25 Number of defrosts Interval between defrosts 0 0 Disabled 1 1 24 hours 0 minutes 2 2 12 hours 0 minutes 3 3 8 hours Ominuti 4 4 6 hours 0 minutes 5 5 4 hours 48 minutes 6 6 4 hours 0 minutes 7 7 3 hours 26 minutes 8 8 3 hours 0 minutes 9 9 2 hours 40 minutes 10 10 2 hours 24 minutes 11 11 2 hours 11 minutes 12 12 2 hours 0 minutes 13 24 1 hour 0 minutes 14 48 30 minutes The first defrost considered is indicated by td over the subsequent 24 hours d1S defrosts will be per formed If the activation time band td _d expires the defrosts are stopped at 24 00 on the last day this does not occur if every day is set If both bands td1 and td2 are configured on the overlapping days only the first to start is activated All the other defrost events are performed Example tdl d 8 Monday to Friday h 9 m 0 P 0 dis d1S 4 4 defrosts a day Starting
10. Ar Flag 0 1 1 This can only be set only on master units and enables the alarms on the slaves to be signalled on the network master The display on the master will how alternating with the temperature the message nx x slave address 1 to 4 and the alarm output will be activated if suitably configured e Ar 0 Alarm signal enabled e Ar 1 Alarm signal disabled HSO to HS9 Alarm log event 0 to 9 alarm code date activation time duration See par 3 3 5 Alarm log p 17 k sii These parameters are accessed from the alarm log menu The controller saves the last 10 alarms activa ted Scrolling the menu displays the alarm code the time it was activated and the duration Code Description UOM Min Max Def HS0 HS9 Alarm log _ Alarm code Important If the RTC board is not installed the alarm log will h_ Hour hours 0 23 not show any information regarding the hour and minutes the n_ minutes min 0 59 alarms were activated alarm duration min 0 999 Example HSO HI press DOWN h17 press DOWN m23 press DOWN 65 This means Alarm HI was activated at 17 23 and lasted 65 minutes 58 MPXPRO 030220186 rel 2 0 0702 2008 6 8 HACCP Hazard Analysis and Critical Control Point HACCP allows control of the operating temperature recording any anomalies due to power failures or an increase in the temperature due to other causes breakages extreme operating conditions
11. Auxiliary output for the connection of the lights inside the cabinet or the cold room It is activated when the controller switches from night status to day status and is deactivated when switching back curtain switch or time bands It can be activated deactivated manually using the A button if parameter H9 0 Master remote light H1 H5 H7 6 This can only be configured on the slaves It allows the auxiliary output on the slave to repeat the same operation as the LIGHT output on the master Auxiliary defrost evaporator H1 H5 H7 7 This is activated to power a heater or reverse the cycle to perform a heater or hot gas defrost on the second evaporator Fan H1 H5 H7 8 Auxiliary output for the connection of the fans on the evaporator the management of the output in this configuration depends on the parameters described in the fan section p 30 and 56 Anti sweat heaters H1 H5 H7 9 Managed according to the rH parameters see the section on the anti sweat heaters H9 Select function associated with the AUX button Code UOM Min Max Def H9 0 1 0 This is used to select the function associated with the A button on the user terminal keypad e H9 0 light output default e H9 1 output AUX 5 1 5 LAN Below are details of the parameters for the basic configuration of a LAN made up of a master unit and up to 4 slaves In Select type of unit Master or Slave Code UOM Min Max Def In z 0 i
12. LSH Low superheat threshold P8 EEV LSH Low superheat integration time P9 EEV LSH Low superheat alarm delay MOP Maximum evaporation pressure PMI EEV MOP MOP threshold saturated evaporation temperature PM2 EEV MOP MOP integration time PM3 EEV MOP MOP alarm delay PM4 EEV MOP MOP function delay when starting control PM5 EEV MOP Enable close solenoid local valve for MOP alarm LSA Low evaporator outlet temperature alarm P10 EEV MAIN Enable close solenoid valve for low superheat LSH and or low suction temperature LSA Pil EEV LSA Low suction temperature threshold P12 EEV LSA Low suction temperature alarm delay P13 EEV LSA Low suction temperature alarm differential C P15 EEV Main Support saturated temp in the event of pressure probe error LOP Minimum evaporation pressure PLI EEV LOP LOP threshold saturated evaporation temperature PL2 EEV LOP LOP integration time PL3 EEV LOP LOP alarm delay Manual valve positioning from the supervisor PMP EEV ADV Enable manual positioning of the expansion valve PMu EEV ADV Manual valve position Read only status variables PF EEV ADV Valve opening steps SH Superheat PPU Valve opening percentage tGS Superheated gas temperature tEU Saturated evaporation temperature P06 EEV ADV PWM expansion valve Ton Toff period 6 3 3 Generic functions PH EEV Main Type of refrigerant Code UOM Min ax Def PH 1 14 3
13. This is used to select whether the unit is a master or a slave e In 0 slave unit default e In 1 master unit Sn Number of slaves in the local network Code UOM Min Max Def Sn 0 4 0 This can only be configured on the master unit It indicates how many slaves are connected in the sub network of the master Default Sn 0 stand alone master unit HO Indirizzo seriale Code UOM Min Max Def Ho 0 199 199 The value of HO has different meanings depending on the type of controller master slave e MASTER HO indicates the network address of the device for the supervisor This must be unique within the entire RS485 supervisor network e SLAVE HO indicates the address of the slave inside the LAN In this case the address of the device for the supervisor is the sum of the serial address of the master and the number of the slave according to the formula Serial address HO master HO slave N B On the slaves HO can be set between 1 and 5 MPXPRO 030220186 rel 2 0 07 02 2008 25 C H9 Select function associated with AUX button p 25 On Slave unit only A d 2 Defrost probe on second evaporator p 54 A rH new version available p 65 Example of assigning parameters In HO Sn Important avoid conflicts in the supervisor addresses between different controllers supervisor Master SA 1 Master
14. 1 Control Sreg default 2 Virtual Sv 3 Outlet Sm 4 Defrost Sd 5 Intake Sr 6 Evaporator outlet superheated gas 7 Saturated evaporation 8 Auxiliary defrost 9 Auxiliary 1 10 Auxiliary 2 see advanced parameters General configuration Assign probe functions Tab 5 y AO Differential to reset high and low temperature alarms Code UOM Min Max Def AO GSE 0 1 20 0 2 0 Alarm ON AQ A0 Alarm OFF temperature AL AH set point Fig 5 e This represents the differential used to deactivate the high and low temperature alarms Specifically it represents the hysteresis required for the automatic reset of both alarms according to the diagram above 32 MPXPRO 030220186 rel 2 0 07 02 2008 A1 Select alarm thresholds relative to the set point or absolute Code UOM Min Max Def AI flag 0 1 0 Establishes the nature of the high and low temperature alarm thresholds e Al 0 Relative threshold The alarm thresholds are expressed as the difference from the current set point Specifically SAH St AH SAL St AL Changing the set point also changes the thresholds 1 Al 1 Absolute threshold The alarm thresholds are expressed as absolute values SAH AH SAL AL Changing the set point does not affect the thresholds Note Parameter A1 also affects alarm thresholds AL2 and AH2 used in the double thermostat function AL Low temperature alarm threshold outlet probe Sm in double thermo
15. 34 5 2CP5 47 SPKTOOB6RO 0 0 45 0 2CP50 1 L Important 0 e board must not be installed on surfaces that exceed 70 C at 50 C ambient and 80 C with 60 C ambient Use an external disconnect switch positioned near the appliance that is compliant with the IEC60947 1 and EC60947 3 standards Use cables rated to 90 C if the temperature of the terminals exceeds 85 C use cables rated to 105 C e connection cables must guarantee insulation up to 90 C and if necessary up to 105 C when the temperature the relay terminals exceeds 85 C the appliance is used in a way that is not described by the manufacturer the specified level of protection may be affected Ifthe current is higher than 6 amperes on relay R1 R2 R3 R4 R5 only use cables with a cross section of 2 5 mm 14 AVG e board must not be accessible to unauthorised persons Fig 2 12 MPXPRO 030220186 rel 2 0 0702 2008 2 Power supply and digital outputs Terminal Function Type of relay I L Power supply 230 Vac 50 mA max Mx20 A 115 Vac 100 mA max 2 3 O Relay 1 EN60730 1 6 4 A 4 C UL 873 8 A 2 FLA 12 LRA 5 E 6 O Relay 2 EN60730 1 8 10 A I C UL 873 12A 12 F
16. A 0 0 1 EM__ Assign E temperature sensor Svt 37 z A 0 0 1 JEn__ Assign dewpoint value to serial sensor Sdp 37 A 0 0 1 cl Probe 1 calibration 38 C Forbargj C 0 0 20 0 20 0 Q Probe 2 calibration 38 PC Forbarg C 0 0 20 0 20 0 3 Probe 3 calibration 38 C Forbargi C 0 0 20 0 200 c4___ Probe 4 calibration 38 PC Forbarg C 00 20 0 20 0 c5 Probe 5 calibration 38 C Forbarg C 00 20 0 20 0 c6 Probe 6 calibration 38 C Forbarg C 0 0 20 0 200 c7 Probe 7 calibration 38 C Forbarg C 00 20 0 20 0 JU6 __ Maximum value of sensor 6 barg 36 barg C 93 L6 100 0 L6 Minimum value of sensor 6 barg 36 barg C 1 0 100 0 U6 U7___ Maximum value of sensor 7 barg 36 barg C 93 L7 100 0 L7 Minimum value of sensor 7 barg 36 barg C 10 100 0 U7 Code Parameter Page UOM Type Def Min Max Note Temperature control parameters CtL St Unit set point lane 27 C E E 500 rl 12 St2 Intake probe set point with Double thermostat 42 F F 500 rl r2 rd Temperature set pont pr E 27 F C 2 0 0 1 20 0 Control differential with Double thermostat epic ig 0 0 function deactivated 5 cu Ri all a r Minimum set point 41 CJE C_ 50 0 50 0 r2 r2 Maximum set point_ l 4 C F C 500 rl 50 3 Enable end defrost signal by timeout 58 flag c 0 0 I 0 signals disabled r4 Automatic night time set point variation 28 CPE C 00 50 0 50 0 Select maxim
17. S2 S3 P2 Select type of probe Group 2 S4 55 P3 Select type of probe Group 3 S6 P4 Select type of probe Group 4 S7 P5 Select type of probe Group 5 serial probes S8 to 11 U6 Maximum value of sensor 6 barg 16 Minimum value of sensor 6 barg U7 Maximum value of sensor 7 C F or barg LI Minimum value of sensor 7 C F or barg Assign advanced probe functions Fd Assign evaporator outlet temp probe Tsuct EEV FE Assign saturated evaporation temp probe T Psat EEV FF Assign defrost temperature probe 2 Sd2 FG Assignment of auxiliary temperature probe 1 Saux 1 FH Assignment of auxiliary temperature probe 2 Saux 2 FI Assign room temperature sensor SA FL Assign room humidity sensor SU Fn Assign glass temperature sensor Svt Fm Assign dewpoint value to serial sensor Sdp Probe calibration la Probe 1 calibration J2 Probe 2 calibration Probe 3 calibration c4 Probe 4 calibration 5 Probe 5 calibration c6 Probe 6 calibration a Probe 7 calibration CE Saturated evaporation temperature calibration LAN and HW 5 Select C or F 6 Disable decimal point tt Enable alarm display on secondary terminal 2 Select display on the secondary terminal de Select display on terminal during defrost H2 Disable keypad and remote control functions H3 Remote control enable code H4 Disable buzzer on terminal if present H6 Configure terminal keypad lock Hdn umber of sets of default p
18. The alarm is disabled if AH 50 Changing the set point does not affect the thresholds The high temperature alarm also features automatic reset that is if the temperature monitored rises abo ve the threshold causing the activation of the alarm it is automatically deactivated when the temperature falls back below the threshold minus the differential AO Ad Delay time for high and low temperature alarms Code UOM Min Max Def Ad min 0 240 120 This indicates after how many minutes from the moment the threshold is exceeded the temperature alarm is signalled It helps avoid false alarms due to interference on the probe signal or temporary Situations Note The temperature alarm delay Ad interacts with the alarm bypass time after end defrost d8 and after continuous cycle c6 After these events in fact the temperature alarms are bypassed for the time set for the specific parameter Only when the time d8 or c6 has elapsed does the delay Ad start counting MPXPRO 030220186 rel 2 0 07 02 2008 33 A Double Thermostat p 42 C d8 Alarm bypass after defrost and door open p 30 A c6 Low temp alarm bypass after continuous cycle p 43 6 ADVANCED FUNCTIONS MPXPRO features a vast range of advanced applications and functions that enhance the basic functions introducing special and innovative management routines As for the basic functions the advanced appli Note cations can be divided into fu
19. daing the defrost 31 fla c 1 0 1 KR 0 fans on during defrost 1 fans off during defrost 8 Fd Post dripping time after defrost fans off with controller on 31 min C 1 0 15 Frd Fan temperature control differential including variable speed 31 SCF C 20 0 1 200 F5 Fan cut off temperature hysteresis 1 C 57 C F C 500 FI 50 0 F6 Maximum fan speed 57 C 80 F7 100 F7 ALL fan speed 57 C 10 0 F6 an start up time e 0 function disabled af 3 S p 0 240 n Select fan control with PWM1 2 output with speed management by phase control 9 57 flag C 1 0 1 0 duration 1 impulse Valve management parameters Evd PI EV Main Select model of electronic valve 45 c 0 0 2 0 Valve not present 1 PWM valve 2 CAREL E2V valve P3 EEV PID Superheat set point 45 K C 10 0 0 0 25 0 P4 EEN DID Proportional gain 47 E C 15 0 00 100 0 EV ntegration time P5 0 Lundion disabled l 47 S C 150 0 900 erivative time 4 Re 0 0 function disabled 3 3 c 201 00 o P7 oe al Low superheat threshold _ 48 K C 70 10 0 P3 EV LSH Low superheat integration time Pa 0 0 function disabled ua gt C i 9 A P9 EEV LSH Low superheat alarm delay 48 c 600 0 999 0 alarm disabled P10 EEV Main Enable close solenoid valve for low superheat LSH and or low suction temperature LSA 49 flag E 1 0 1 Pil EEV LSA Low suction temperature threshold 50 F C 45 0 50 0 500 PI EE V LSA Low suction temperature alarm delay 50 c 600 0 999 0 a
20. the variables relating to the refrigerant PID electronic valve PWM the following situation is defined whereby the pressure probe error is ignored e pressure probe defined using parameter FE e probe error broken out of range during defrost e defrost and dripping phase in progress In this situation the pressure probe error is ignored until the end of the defrost that is until timer Pdd starts counting again restarting normal management of the pressure probe error Exception if the defrost starts when there is a pressure probe error the procedure for disabling the alarm is not activated and the alarm continues to be signalled as in the normal situation In this case the master probe will be used if the unit involved is a slave or the value of parameter P15 fixed value if all the probes have errors When the value is sent by the supervisor the refreshing of the pressure probe reading during defrost needs to be disabled when loading the timer related to parameter Pdd in the post dripping phase d12 0 during defrost supervisor pressure probe refresh enabled Po4 and pressure probe error disabled d12 1 during defrost supervisor pressure probe refresh enabled Po4 and pressure probe error enabled d12 2 during defrost supervisor pressure probe refresh disabled Po4 and pressure probe error disabled d12 3 during defrost supervisor pressure probe refresh disabled and pressure pro
21. 0 0 60 0 0 0 This function is used to reduce or completely eliminate the typical temperature swings caused by sudden activation deactivation of the solenoid valve The function is activated based on the refrigeration unit control temperature and affects the cooling capacity of the electronic valve In particular the function is activated when the control temperature falls below half of the differential rd In this band the superheat set point P3 is increased by the parameter OSH The effect of this action is the gradual advanced closing of the electronic valve which makes the decrease in temperature inside of the refrigeration unit slower and more stable In this way the actual temperature of the cabinet can be kept very stable and near the set point without ever having to close the solenoid valve but rather by simply controlling the flow of refrigerant Controlled temperature C Ton st e rd cabinet differential C Tf st rd 2 Function intervention threshold C Interval in which the function is ON Toff st Cabinet set point C Time Tf set point st differential rd 2 Fig 6 g Note e The action of OSH is weighted based on the difference between the temperature set point and the control temperature The lower the difference the greater the action of OSH and vice versa e OSH is active in a band at maximum equal to half of the differential rd e Wit
22. 2 0 Code UOM Description Min n Max Def tGS C F Evaporator outlet temperature a Status variable that only displays the evaporator outlet temperature read by the corresponding probe advanced parameter Fd tEu Saturated evaporation temperature Parameters modified from version 2 0 Code UOM Description Min Max Def teu C F Saturated evaporation temperature Status variable that only displays the saturated evaporation temperature calculated by the corresponding evaporation pressure probe or read directly by the NTC probe advanced parameter FE Po6 EEV ADV PWM expansion valve Ton Toff Code UOM Min Max Def Po6 S 1 20 6 This represents the period of modulation in seconds for the PWM expansion electronic valve DC AC only The opening of the PWM valve is controlled based on the same PID parameters and refers to the period Po6 in seconds and not the 480 steps representing the maximum opening of the stepper valve All the comments made for the stepper valve can thus be applied to the PWM valve considering these differences 6 3 8 Power failure The electronic valve requires a power supply to be able to open or close In the event of power failures it remains in the current position Consequently a solenoid valve is required upstream of each individual evaporator or master slave network to close the circuit and ensure the safety of the installation in
23. 2 52 3 S3 4 S4 5 55 6 S6 7 S7 8 S8 serial 9 S9 serial 10 S10 serial Il S11 serial Note If the serial probe has been set MPXPRO signals an error if this value has not been updated for over 20 minutes 6 1 5 Network pressure saturated evaporation temperature probe MPXPRO ccan share the pressure saturated temperature probe on the master within a master slave network This mode is automatic no parameter needs to be set If any of the slaves controls an electronic valve it requires a pressure probe If this is available locally that is connected directly to the slave this probe has absolute priority and the device uses it to control the valve If no probe is fitted or there is a probe error the slave automatically requests the pressure value from the master and uses that probe for the control functions Only when the pressure probe on the master also shows an error does the slave activate the emergency function to bypass the probe with parameter P15 Note e the local probe has priority over the network probe e the calibration of the saturated temperature cE is performed locally on each device e the calibration of the probe c1 c7 is performed by the device that the probes are connected to Example Below is a possible configuration of the physical probes on a refrigerated cabinet for the management of the electronic valve physical probe Type of probe Parameter Function assigned
24. 5 Using the UP or DOWN button view the description of the selected alarm that is year month day hours minutes and duration in minutes 6 Press SET again to return to the previous list In addition the HACCP alarm menu allows the following operations e Delete an individual HACCP alarm by pressing SET amp DOWN for 5 seconds when displaying the list of alarms This causes the HACCP to flash the display shows the message rES and the monitoring of HACCP alarms is reinitialised e Delete the entire memory of HACCP alarms by pressing SET amp UP amp DOWN for 5 seconds This procedure displays the message rES deletes the entire memory of alarms and reinitialises the monitoring of the HACCP alarms MPXPRO 030220186 rel 2 0 07 02 2008 4 START UP This chapter describes the configuration of the inputs and the outputs suggested by CAREL as well as the controller start up procedure to ensure the correct commissioning of the installation 4 1 Recommended initial configuration MPXPRO features highly configurable inputs and outputs CAREL in any case recommends the basic configurationd on the default settings of the parameters By following this suggestion the controller can independently manage the main functions in most applications without having to significantly modify the settings of the parameters The suggested settings are shown on all the wiring diagrams e Initial configuration of the inputs
25. 600 This is the time that MPXPRO remains in low superheat status for before activating the corresponding alarm When the alarm is activated the following occur Message LSH shown on the display e The buzzer is activated The low superheat alarm features automatic reset that is it is automatically reset if the alarm condition is no longer present P8 0 gt low superheat alarm disabled This allows the forced closing of the local or network solenoid valve based on the configuration of the system see parameter r7 if the low superheat alarm LSH or low evaporation temperature LSA is activated Forced closing is completed when the alarm is automatically reset that is when the superheat returns above the threshold MPXPRO 030220186 rel 2 0 0702 2008 e MOP Maximum evaporation pressure When starting or restarting an installation the compressors may not be able to satisfy the simultaneous refrigeration requirements of all the refrigeration utilities in the installation This may cause an excessive increase in the evaporation pressure and consequently the corresponding saturated temperature When the evaporation pressure expressed in degrees saturated rises above the threshold after a certain settable time the system enters MOP protection status PID superheat control is stopped and the controller starts gradually closing the valve with an integration action to return the evaporation pressure below the threshold The
26. On Switch ON OFF Switch OFF Reset alarms with MAN reset TES Reset HACCP alarms Reset temperature monitoring MA Communication error with the Master only on Slave A AUTO ul u5 Communication error with Slave 1 5 only on Master A AUTO nl n5 Indicates alarm on unit 1 5 in the network A ON ON AUTO upL Signals upload procedure in progress up1 up5 Signals upload procedure with errors on the unit 1 5 A OFF OFF uS Slave unit not configured OFF OFF AUTO bLo Blocked valve alarm A ON OFF MAN Tab 9 a MPXPRO 030220186 rel 2 0 07 02 2008 67 9 2 Table of alarms and signals functions enabled disabled The following table indicates the functions that are enabled and disabled in the various alarm situations Code Description Compressor Defrost Evap fans Continuous Communica Effect on the valve cycle ted to Lan network solenoid TE Control probe fault Duty setting c4 unvaried unvaried unvaried DI EJ Room probe S1 fault Duty setting c4 unvaried unvaried unvaried DI B Defrost probe S2 fault unvaried unvaried unvaried unvaried DI E3 Probe S3 fault unvaried unvaried unvaried unvaried y Eq Probe S4 fault unvaried unvaried unvaried unvaried V 5 Probe S5 fault unvaried unvaried unvaried unvari
27. SA 6 Master SA 9 n 1 Sn 4 Ho 6 In 1 Sn 2 HO 9 In 1 Sn 0 Slave 1 SA 2 Slave 1 SA 7 HO 1 In 0 HO 1 In 0 LAN locale Slave 2 SA 3 Slave 2 SA 8 HO 2 In 0 Ho 2 In 0 Slave 3 SA 4 Ho 3 In 0 Slave 4 SA 5 Ho 4 In 0 Slave 5 SA 6 HO 5 In 0 SA Serial address Fig 5 b AS Important r7 is only set on the master N Important This cannot be set to 0 with the RTC installed For details on navigation inside the sub menus and saving the parameters see p 17 A Important Setting the start time of a time band only or the end time only means that the controller remains permanently in Day or Night status Default d h m 0 no band enabled 26 r7 Enable solenoid output on the Master as sole LAN solenoid Code UOM Min Max Def 7 flag 0 1 0 Indicates whether just one solenoid valve connected to the master has been installed in the master slave network or there is a solenoid valve for each slave e r7 0 one solenoid valve for each unit default e r7 1 one shared network solenoid valve The network solenoid valve is controlled in parallel between all controllers in the sub network if at least one is called this is opened while it is closed only when all the units are at the set point or defrosting The network solenoid valve can also be closed in special cases when alarms LSH LSA and MOP are activated on any of the units in the sub network see P10 and PM5 Important
28. This is shown in the figure below Alarm HACCP HA Maximum temperature recorded Temperature Alarm AH AH set point St gt lt lt Htd Ad Alarm duration Fig 6 t Htd HACCP alarm delay Code UOM Min Max Def Htd min 0 240 0 This represents the additional time for recording a HACCP alarm It is therefore recorded after the time Ad Htd Htd 0 HACCP recording disabled The HACCP LED is on if Htd gt 0 HA HA1 HA2 HA alarm events Alarm code hour UOM Min Max Def minutes and duration HA HA2 Y_ Year 0 99 M Month 1 12 d_ Day 31 h Hour 0 23 n min 0 59 alarm duration 0 240 These parameters are accessed from the HACCP menu The last 3 alarms can be displayed alarm code month day hour minutes duration of the alarm The order of the alarms listed is progressive HA is the most recent alarm When the list is full and a new alarm is generated the oldest one is deleted Example Code Alarm code hour minutes and Meaning duration HA HA y 03 M_ 12 Indicates that the HA alarm was gene d_ 06 rated on 6 December 2003 at 11 15 h 1 and lasted 199 minutes n 16 199 Tab 6 i MPXPRO 030220186 rel 2 0 0702 2008 C amp do Select type of defrost p 29 Read only parameter A Important to reset the alarms and for information on naviga
29. USB ports on the converter and the PC using a USB cable N B To manage the slave units in the sub network make sure that these are correctly connected to the master via the tLAN MPXPRO 030220186 rel 2 0 07 02 2008 8 NEW VERSION 12 1 AVAILABLE With the new firmware version 2 0 called step 2 MPXPRO significantly increases its functions above all in terms of connectivity and ease of use To identify the version check the user terminal or display when starting of the instrument MPXPRO in fact displays a message such as r2 1 where 2 corresponds to the firmware version The main new features of this version are division of parameters into F C A F frequent use C basic configuration reflects the basic section of this manual A advanced configuration reflects the advanced section of this manual Staggered defrosts fast pro gramming of defrosts Anti sweat heater modulation with master slave network management of the dewpoint and the possibility not to use the glass temperature sensor Commissioning tool the VPM xxx software is available for MPXPRO for the complete management of all the parameters and variables creation of programming keys MXOPZKEYAO and overriding the status see the on line manual for further information Remote control IRTRMPX00 specially developed to simplify the start up phase see the specific instruction sheet for further information code 050003550 Extens
30. alarm after bypass time defined by basic parameter d8 Note e When resuming control the compressor protection times are observed advanced parameters com pressor e If the door remains open for a time greater than the value set for parameter d8 control is resumed in any case The light remains on the value shown on the display flashes the buzzer and the alarm relay are activated and the temperature alarms are enabled with the related time A4 A5 A10 A11 A12 6 Remote ON OFF Remote OFF N Remote ON When the controller is OFF 1 the display shows the value measured by the probes set basic parameter t1 alternating with the message OFF the auxiliary relays set as AUX and light remain active while the other auxiliary outputs are deactivated the buzzer and alarm relay are deactivated the following are not performed control defrosts continuous cycle temperature alarm signals 5 the compressor protection times are observed When the controller is ON again all the functions are reactivated except for the defrost on start up and the compressor fan delay on power up MPXPRO 030220186 rel 2 0 0702 2008 WN A H4 General configuration p 39 C H1 H5 H7 General configuration p 24 A A6 Solenoid control configuration during external alarm immediate or delayed p 52 C F2 Enable fan stop with control off p 31 A c3 Minimum On time p 52 A A7 Delay time for delayed external ala
31. any external contact The lowering of the curtain in fact generally causes a decrease in the temperature inside the unit and may cause problems if C St rd Unit set point temperature differential p 27 the control method is not adapted The two thermostats each have their own specific set point St for the outlet probe St2 for the intake probe and corresponding differential rd for Sm rd2 for Sr see paragraph 5 2 Basic control p 27 Probe set point Differential outlet Sm St td intake Sr sta rd The operation of each thermostat Sm or Sr is perfectly identical to the operation described for the main control probe The general control status depends on the combination of the status of both thermostats that is control will be active only when both thermostats require refrigeration The table below illustrates the general status of the unit based on the status of the two thermostats Outlet probe Sm Intake probe Sr Thermostat cal call ON satisfied call OFF Sr cal satisfied OFF satisfied satisfied OFF error or absent equivalent to call call ON error or absent equivalent to call satisfied OFF Sm cal error or absent equivalent to call ON satisfied error or absent equivalent to call OFF error or absent error or absent duty setting c4 Tab 6 e Cooling Note e Parameter rd2 gt 0 enables the double thermostat function e In d
32. as they have no meaning e Example 2 S8 temperature probe gt bit 0 0 S9 temperature probe gt bit 1 0 S10 generic probe gt bit2 1 S11 generic probe gt bit3 1 bit 3 2 0 Bit value 1 1 0 0 Corresponding decimal value 8 4 2 1 Partial value 8 4 0 0 P5 12 Example 3 To set S8 S9 as non temperature probes generic and S10 S11 as temperature probes set P5 1 2 3 U6 L6 U7 L7 Minimum and maximum values of probes S6 and 7 As well as the common NTC PTC and PT1000 probes MPXPRO can connect the following to inputs S6 and S7 e 0 to 5 Vdc ratiometric probes powered directly by the controller Active 4 to 20 mA probes not powered by the controller e Active 0 to 10 Vdc probes This type of probes require the definition of the range of measurement that is the maximum and mini mum values that can be measured Parameters L6 L7 U6 and U7 are used especially for this purpose for probes S6 and S7 respectively U6 Maximum value of sensor 6 barg Code UOM Min ax U6 barg L6 100 0 Def 93 This represents the maximum value that the ratiometric sensor connected to analogue input S6 can measure It determines the maximum possible value associated with an input of 5V i Ratiometric L6 Minimum value of sensor barg L6 L7 U6 U7 Probe Code UOM Min ax Def L6 barg 100 0 U6 10 This represents the minimum value that the ratiometric sensor connected
33. display with IROPZTLNOO converter This is used to connect a supervisor PC running the special software to an MPXPRO controller via a terminal or display fitted with the commissioning port To use this commissioning connection e Identify the connection port located under the keypad on the IR U and IR X terminals displays see the figure to the side Connect the USB ports on the converter and the PC using a USB cable If the PC is connected to a master unit the software can access the parameters and status variables relating to the master controller as well as the parameters unit and operating and status variables of the slave controllers in the sub network If the connection is made to the terminal on a slave only the parameters unit operating operation and status variables of that slave can be accessed Commissioning via the RS485 supervisor port with CVSTDUMORO converter As well as the connection via the terminal MPXPRO can also be connected to a PC via the RS485 super visory network In this case the PC will only be connected to the master unit Access to the parameters unit and operating operation and status variables relating to the slaves connected to the master will be available via the master controller see the figure to the side To use this commissioning connection e Connect a master unit board terminals 20 21 22 to the RS485 output on the CVSTDUMORO conver ter using an RS485 cable Connect the
34. display are optional and in this case they are recognised automatically when connected If the device is configured as optional no alarm is generated on the supervisor when not connected The possible combinations are shown below to User terminal Display 0 Connected Connected Optional Connected 2 Connected Optional 3 Optional Optional Default to 3 gt Terminal and display optional If not connected no alarm is generated H3 Remote control synchronisation code Code UOM Cat Min Max Def H3 C 0 255 0 This the code used to synchronise the remote control to one device only avoiding the problem of possi ble interference with other adjacent devices If the remote control is used extensively this code should be the same on all the devices in the installation for example equal to the serial address d12 Pressure probe management during defrost Code UOM Cat Min Max Def d12 E A 0 3 0 Used to disable the pressure probe error and update the value of the probe to the supervisor so as to maintain the last useful during hot gas defrosts Even if it is specific for hot gas defrosts this parameter is the same for any type of defrost d12 probe error supervisor update 0 Enabled Enabled 1 Enabled Disabled 2 Disabled Enabled 3 Disabled Disabled For the purpose of avoiding false errors in the pressure sensor reading during defrosts used to calculate
35. fastening brackets PWM EEV expansion board Pulse Width Modulation MX2OPPWM Fig 1 d Optional board for controlling an AC or DC PWM electronic expansion valve live Model MX2OPPWMO0 also has a 0 to 10 V modulating output for the control of external actuators It is installed on the main board using special fastening brackets 0 to 10 Vdc expansion board MX20PA100 Fig 1 e Optional board used to control external actuators with 0 to 10 Vdc modulating output It is installed on the main board using special fastening brackets Fig 1 e MPXPRO 030220186 rel 2 0 07 02 2008 7 Fig 1j O For further information on electrical connections see p 12 RTC board and RS485 interface MX20P48500 Fig 1 f Optional board used to add the RTC and RS485 interface functions in the MPXPRO Slave models The master versions are already fitted with this board USB I2C converter IROPZPRG00 for programming key Fig 1 g Converter used to interface a PC running special software with a standard CAREL programming key MXOPZKEYAO see Chapter 7 USB tLAN converter for commissioning tool IROPZTLNOO Fig 1 h Converter used to interface a PC running special commissioning software the VPM with an MPXPRO device Small display terminal IR U Fig 1 1 Remote user terminal with 3 digits and 4 buttons for displaying the status and setting the device parame ters Small display IR X Fig 1 Use
36. from 9 00 on Monday morning 4 defrosts are performed every day until Friday evening at midnight that is one defrost every 6 hours Below is the list of the defrosts that are performed Mon 9 00 Mon 15 00 Mon 21 00 Tue 3 00 Tue 9 00 Tue 15 00 Tue 21 00 Wed 3 00 Wed 9 00 Wed 15 00 Wed 21 00 Thu 3 00 Thu 9 00 Thu 15 00 Thu 21 00 Fri 3 00 Fri 9 00 Fri 15 00 Fri 21 00 8 2 4 Anti sweat heater modulation Modulation of the anti sweat heaters in MPXPRO is performed by comparing the dewpoint calculated based on the room temperature and humidity and the showcase glass temperature measured by the sensor or estimated using the temperature inside the showcase and the room temperature Inputs The humidity SU and room temperature sensors SA can be see parameters FI FL connected to the master which automatically shares the values with the slaves connected locally to each controller sent via the supervisory system using the serial probes Alternatively the supervisory system can directly supply the value of the dewpoint Sdp using the serial probes see parameter Fn j he sensor can be connected directly to each controller see parameter Fn if not configured the value is estimated using the room temperature SA and the outlet and intake probes Sm and Sr if one of these is not fitted SA or either Sm or Sr only manual activation will be possible according to parameters rHn and rHt The estimate of the g
37. glass temperature closer to the set point Sdp rHo Important If serial probes are used via the supervisor MPXPRO features 4 support variables for the propagation of the room temperature and humidity these save the value every 30 minutes which is then available in the event of power failures The sensors not updated alarms are therefore only shown when first starting that is when these variables have not yet been initialised Description of the parameters rHu Anti sweat activation percentage constant output Code UOM Cat Min jax Def rHu 0 100 70 Determines the constant activation percentage of the anti sweat output if digital outputs AUX1 AUX2 AUX3 are used or in the event of manual operation of the analogue outputs due to a sensor error rHt Anti sweat activation period Code UOM Cat Min Max Def rHt min 0 180 4 Determines the maximum activation period of the anti sweat output if digital outputs AUX1 AUX2 AUX3 are used or in the event of manual operation of the analogue outputs due to a sensor error rHo Anti sweat heater modulation offset Code UOM Cat Min Max Def rHo C F A 20 20 0 Dewpoint offset Increases the dewpoint calculated so as to allow greater margins of safety in the action of the heaters rHd Anti sweat heater modulation differential Code UOM Cat Min Max Def rHd SGSF A 0 20 0 Determines the modulation range for the heaters High values mean very
38. protection function has been designed to allow a gradual return to normal operating conditions that is when the critical conditions have ended the controller temporarily operates with a higher superheat set point until the function is automatically reset Important if this action causes the complete closing of the electronic valve the solenoid valve is also closed even if this is a network solenoid valve when enabled The alarm signal with the message MOP on the display is delayed from the activation of the protection function and is automatically reset as soon as the saturated temperature falls below the threshold PM1 EEV MOP MOP threshold saturated evaporation temperature Code UOM Min Max Def PMI QPF 50 0 50 0 50 0 This represents the maximum evaporation pressure expressed in degrees saturated above which the MOP protection and alarm are activated each with its own delay times The protection is reset semi automatically that is there is a gradual return to normal operation to avoid the critical situations arising again PM2 EEV MOP MOP integration time Code UOM Min Max Def PM2 Ss 0 0 240 0 10 This represents the integration time for the maximum evaporation pressure protection function This replaces the normal PID control during MOP status PM2 0 gt MOP protection and alarm disabled PM3 EEV MOP MOP alarm delay Code UOM Min Max Def PM3 5 0 999 0
39. saves the maximum and minimum values measured to specific variables that are then directly accessible from the terminal MPXPRO 030220186 rel 2 0 07 02 2008 57 fans regulation speed A F6 max speed F7 min speed 0 speed FA Frd FI F5 i if F0 1 Sd Sv ifF0 2 Sd Fig 6 r r5 Select minimum and maximum temperature monitoring probe Code UOM Min Max Def r5 li 0 10 0 This setting identifies the probe used for maximum and minimum temperature monitoring r5 Monitoring probe 5 Intake Sr 0 disabled default 6 Evaporation superheated gas Tsuct 1 Control Sreg 7 Saturated evaporation Tevap 2 Virtual Sv 8 Auxiliary defrost 3 Outlet Sm 9 Auxiliary 4 Defrost Sd 10 Auxiliary 2 Tab 6 h d rt Duration of the current maximum and minimum temperature monitoring session Important Once having exceeded the maximum time of Code UOM Min Max Def 999 hours monitoring continues while the value displayed is rt hours 0 999 i locaked on 999 o I N This is used to display how many hours the monitoring has been active for and is consequently the reference interval for the values measured Monitoring can be reset directly from the keypad by pressing SET UP DOWN for 5 seconds This is indicated by the message rES on the display rH rL Minimum and maximum temperature acquired in the session Code Description U
40. second evaporator defrost probe configured using advanced parameter FF dt2 Second defrost end temperature read by Sd2 Code UO Min Max d2 CF 50 0 50 0 Def This represents the end defrost threshold for the second evaporator The same remarks made for the threshold on the main evaporator are valid see basic parameter dt1 dP2 Maximum defrost duration on second evaporator Code UO Min Max Def dP2 min 1 240 45 This represents the maximum defrost duration on the second evaporator The same remarks made for dP1 are valid 6 5 4 Special functions As well as the normal defrost functions MPXPRO features of a series of special functions used in situations in which specific types defrost of required These functions are 1 Skip defrost function used to avoid unnecessary defrosts 2 Running time automatic start defrost call based on current operation 3 Sequential stops defrost performed by sequential stops in control 4 Power defrost More effective defrosts e Skip Defrost The Skip Defrost function is used to avoid unnecessary defrosts It can be used for defrosts that end by temperature and monitors the duration of the previous defrost identified by the time taken by the refrigeration unit to reach the end defrost threshold establishing whether or not the next defrosts are necessary The decisive duration is determined by parameter dn which expresses the duration as a perc
41. the evaporator temperature and the status on off of the com pressor MPXPRO compared to previous models can also manage the operation of the fans in relation to the virtual probe 5 4 1 List of parameters Code Parameter FO Configure fan management FI Fan control temperature threshold only if FO 1 or 2 F2 Enable stop fans with control off F3 Stop fans during defrost Fd Post dripping time after defrost fans off with controller on Frd Fan temperature control differential including variable speed 5 4 2 Fan parameters FO Fan management Code UOM Min Max Def FO 0 2 0 The evaporator fan can be managed in three different modes e Management irrespective of the temp inside the cabinet and the evaporator temp FO 0 e Management depending on both the temp inside the cabinet and the evaporator temp F0 1 e Management depending on the evaporator temperature only F0 2 Based on the configuration in particular if the fans are managed according to the temperature the following basic parameters need to be set e F1 fan start temperature Frd differenziale ventilatori MPXPRO 030220186 rel 2 0 0702 2008 MPXPRO based on the configuration manages the status of the fans according to the table below FO _ Function Condition Fan status 0 Fans without temperature control F2 0 Fans always on F2 1 Fans off if control off I Fans controlled based
42. the local communication network LAN the hardware features and navigation 5 Select C or F Code UOM Min Max Def 5 flag 0 1 0 Defines the unit of measure used for control and display e 5 0 degrees centigrade C e 5 1 degrees Fahrenheit F 6 Disable decimal point Code UOM Min Max Def 6 flag 0 1 0 This is used to enable or disable the temperature display with resolution to the tenth of a degree between 20 0 and 20 0 Outside of this range the resolution is always unvaried C F e 6 0 data displayed with resolution to the tenth of a degree e 6 1 data displayed without resolution to the tenth of a degree t Enable alarm display on secondary terminal Code UOM Min Max lt flag 0 1 Def 0 This is used to enable or disable the display of the alarm codes on the secondary display e t 0 alarms not displayed e t 1 alarms displayed t2 Select display on secondary terminal Code UOM Min Max Def 2 flag 0 14 0 This is used to select the probe displayed on the secondary terminal display 2 Associated probe 0 Absent_ default SI 2 S2 3 3 4 S4 5 S5 6 S6 7 S7 8 S8 serial 9 S9 serial 10 S10 serial 11 S11 serial 12 Control probe Sreg 13 Virtual probe Sv 14 Set point No probe is displayed Display not installed d6 Select display on terminal during the defro
43. the refrigeration unit This phase is called post dripping Parameter Fd has priority over any other type of fan management in this period Frd Temperature control differential including variable speed Code UOM Min Max Def Frd F 0 1 20 0 2 0 MPXPRO 030220186 rel 2 0 07 02 2008 31 Sd F2 0 fans always ON F2 1 Fans OFF when regulation OFF F0 1 Sd Sv F0 2 Sd FI F1 Frd Fans OFF Fig 5 f A dd Dripping time after defrsot fans off p 54 A Defrost on second evaporator p 54 This represents the temperature differential in relation to F1 for managing the activation of the fans It is also used for the analogue control of the fan speed when phase control devices are adopted Fan operating status Function Fo Sub function Parameters ON OFF Fans without temperature 0 Not linked to control F2 0 Always Never control status Linked to control status F2 1 Control ON _ Control OFF Fans controlled by evaporator 1 Sv Sd gt F1 Sv Sd lt F1 temperature and virtual probe Frd Fans controlled by evaporator 2 Sd lt F1 Frd Sd gt FI temperature Fan status in defrost Select fan status during F3 F3 0 F3 1 defrost Tab 5 w 5 5 Temperature alarms The high and low temperature alarms are used to display possible anomalies due to changes in the temperature inside the refrigeration unit The activation of a temperature ala
44. this interval reaches the value set for the parameter without a defrost being performed by other events RTC manual ly by button or supervisor physical or virtual digital input a defrost is started immediately This count is always active even if the controller is off logical OFF If set on a slave unit it has effect only on this unit independently from the others while if set on a master it has effect on all the sub LANs connected dl 0 gt safety disabled only the programmed or forced defrosts are performed see Fig 5 e Note The time base of the interval can be changed using advanced parameter dC Defrost Defrost occurred non occurred A 4 A A tdi td2 td3 td4 RTC break Fig 5 e dt1 End defrost temperature read by Sd Code UOM Min Max Def dt SQF 50 0 50 0 8 0 For the defrost by temperature with temperature control only d0 1 2 4 Indicates the end defrost temperature measured by the defrost probe Sd installed on the evaporator If this temperature is not reached the defrost ends in any case after the maximum time dP1 This temperature is also checked at the start of each defrost both local and network therefore if when the local defrost is called the temperature measured by the defrost probe Sd is greater than the threshold dtl the defrost is not started If the call comes from the network the defrost on that unit is considered completed and subsequent dripping and post dripping phases are started
45. to analogue input S6 can measure It determines the minimum possible value associated with an input of OV U7 Maximum value of sensor 7 barg Code UOM Min ax U7 barg L7 100 0 Def 93 This represents the maximum value that the analogue input S7 can measure It determines the maximum possible value associated with an input of 5V 20mA or 10V based on the type of probe connected L7 Minimum value of sensor 7 barg Code UOM Min Max Def ni JU barg 100 0 U7 10 m OV This represents the minimum value that the analogue input S7 can measure associated with an input of OV or 4mA based on the type of probe connected 7 u7 Active Example Connecting a ratiometric probe to input S6 Probe To connect a ratiometric probe 0 to 5V to physical input S6 and ensure that the values measured are correctly displayed by the controller par P3 U6 L6 FE must be set as follows Parameter Action Fig 6 a P3 4 Ratiometric probe 0 to 5 Vdc to input S6 U6 9 3 The maximum value displayed by the controller is 9 3 bar l6 1 The minimum value displayed by the controller is 1 bar FE 6 Pressure sensor to measure the saturated evaporation temperature Tab 6 b C FA Fb Fc Assign temperature probes p 21 i A PH EEV Main type of refrigerant p 45 MPXPRO automatically converts the pressure value measured by the physical probe to the saturated evaporation temperature based on the
46. to the sum of the current set point and the night time offset r4 see basic parameter r4 p 28 e only use the intake probe as the control probe see parameter r6 p 28 When switching back from Night status to Day status the controller resumes standard operation Parameter tS sets the start of the time band parameter tE sets the end of the same band Each of these parameters if selected with the set button contains a sub menu that is used to set the day hours and minutes of the specific event In detail the sub menus can be navigated with the da or buttons to set e d the days the band is activated according to the table on the side e h the hour the band is activated e m the minute the band is activated Note During night status the icon is shown on the display Day night status is automatically propa gated from the master to the slaves H8 Select output switched with time bands Light and AUX Code UOM Min Max Def H8 flag 0 1 0 This is used to associate Day status and Night status with a specific auxiliary output which must have already been configured by parameters H1 H5 H7 Specifically e H8 0 Switching from Day status to Night status deactivates the auxiliary output configured as the LIGHT default and vice versa e H8 1 Switching from Day status to Night status deactivates the auxiliary output configured as AUX and vice versa If no auxiliary output is configured the c
47. type of refrigerant indicated for parameter PH 36 MPXPRO 030220186 rel 2 0 0702 2008 6 1 4 Assign probe functions Chapter 5 basic functions describes three main functions relating to the temperature probes for the control of the refrigeration unit e air outlet temperature Sm parameter FA e defrost temperature Sd parameter Fb e air intake temperature Sr parameter Fc As well as these MPXPRO features other special functions directly associated with any physical probe connected to the controller or one of the serial probes available for managing the electronic valve or other advanced functions Assignment of the advanced probe functions Parameters modified from version 2 0 cd _ Name UOM Min_ Max Def Fd_ Assign evaporator outlet temp probe Tsuct EEV 0 0 FE_ Assign saturated evaporation temp probe T Psat EEV FF_ Assign defrost temperature probe 2 Sd2 FG _ Assign auxiliary temperature probe 1 Saux 1 FH_ Assign auxiliary temperature probe 2 Saux 2 FI _ Assign room temperature sensor SA FL_ Assign room humidity sensor SU FM Assign glass temperature sensor Svt ojojojojojojojo E ey POED PP PP p p PD ojojojojojojojo Fn_ Assign dewpoint value to serial sensor Sdp Each function can be associated with any probe Fd FE FF FG FH Associated probe 0 disabled 1 SI
48. user errors etc Two types of HACCP event are managed 6 8 2 Type HA HACCP alarms high temperature during normal operation 6 8 3 Type HF HACCP alarms high temperature after a power failure When a HA or HF event occurs the following data are saved e hour minutes and day of the month when the alarm was activated and alarm duration e type of alarm When an alarm is recorded the HACCP LED flashes the display shows the alarm code the alarm is saved and the alarm relays and buzzer if featured are activated The latter can be reset simply by pressing the SET DEF buttons for the single alarm for all the alarms HA HF by pressing SET DEF AUX If HACCP is enabled Htd gt 0 and the HACCP LED is on 6 8 1 List of parameters Code Description HA Date time of the last HA event HAI Date time of the second to last HA event HA2 Date time of the third to last HA event HAn Number of HA alarm HE Date time of the last HF event HFI Date time of the second to last HF event HF2 Date time of the third to last HF event HFn Number of HF alarm 6 8 2 Type HA HACCP alarms The HA alarm is generated when during normal operation the temperature read by the probe set for parameter AA exceeds the high temperature threshold AH for a time Ad Htd Therefore compared to the normal high temperature alarm already signalled by the control the type HA HACCP alarm is delayed by a further specific time Htd for HACCP monitoring
49. virtual probe reading according to the table above The value of FO indicates e FO 1 Threshold for the difference between the evaporator temperature Sd and virtual probe temperature Sv e FO 2 Absolute threshold for the evaporator temperature read by Sd Note e If there are two evaporator probes see advanced section Defrost Second evaporator control will be performed on the maximum value of the two probes available to ensure that the fans are activated when all the probes reach the required temperature e In the event of errors on the control probes the fans are always on F2 Enable stop fans with control off Code UOM Min Max Def F2 Flag 0 1 1 In combination with parameter FO this is used to link the status of the fans with the control status F2 Fan status 0 FO 0 Fans always on FO 1 2 Fan controller active 1 Fans off if solenoid control off Tab 5 v F3 Stop fans during defrost Code UOM Min Max Def FS Flag 0 1 1 During the defrost the operation of the fans can be selected as follows e F3 1 Fans on e F3 2 Fans off Fan differential including variable speed Fd Post dripping time after defrost fans off with control on Code UOM Min Max Def Fd min 0 15 1 After the dripping phase the fans may be stopped beyond the period dd for a further period Fd to allow the evaporator to return to operating temperature ad avoid sending hot air into
50. 1 E This is used to enable disable the positioning of the valve cancelling the activation of any control function or alarm e PMP 0 manual positioning disabled e PMP 1 manual positioning enabled PMu EEV ADV Manual valve position Code UOM Min Max Def PMu 0 600 If manual positioning is enabled this is used to set the manual opening of the electronic valve The value is expressed in steps for stepper valves and as a for PWM valves 6 3 7 Read only status variables PF EEV ADV Valve opening steps Code UOM Description Min Max Def PF Absolute valve position 0 480 Status variable that only displays solely from the supervisor the current position of the electronic valve calculated by the controller System malfunctions may cause this value to be different from the effective position of the valve Not used with PWM valves SH Superheat Parameters modified from version 2 0 Code UOM Description Min Max Def Pol K Superheat a Status variable that only displays of the superheat value calculated by MPXPRO and used to control of the valve PPU Valve opening percentage Parameters modified from version 2 0 Code UOM Description Min Max Def PPU Valve opening as a percentage Status variable that only displays the electronic valve opening as a percentage tGS Superheated gas temperature Parameters modified from version
51. 10 TABLE OF PARAMETERS Key to the table Code code of the Parameter name Min max or Def Type C basic applications PW 22 F frequent A advanced applications PW 33 NV not visible from parameter as shown on the display of the parameter and any possible values Minimum maximum or default value UOM unit of measure Note space for notes showing the settings of the parameters terminal N B the codes of the A parameters are highlighted in bold Code Parameter Page UOM Type Def Min Max Note Temperature probe management parameters Pro 2 Analogue probe measurement stability l 41 E 4 1 15 4 Mina probe composition0 outlet probe Sm 100 intake probe Sr 28 C 0 0 100 Select C or F 5 0 display in E 38 flag C 0 1 Disable decimal point 6 0 decimal point enabled a flag S o rHS con osizione sima sonda vetro J 67 NV 20 100 Enable display alarms on the secondary termina it 0 display on second term disabled sd flag l Select display on the main terminal Val 0 not present 22 C 12 0 14 1 to 11 S1 to S11 12 Control probe Sreg 13 Virtual probe Sv 14 Set point t2 Select display on the secondary terminal See _ t1 38 C 0 0 14 Select optional terminal to 0 User termina
52. 6 Example 2 selecting the type of probes P4 1 S7 DI4 standard PTC temperature probe S7 DI5 can be used as a digital input for the immediate external alarm A11 1 P5 Select type of probe Group 5 serial probes S8 to S11 Code UOM in Max Def P5 0 15 0 Serial probes S8 to S11 are virtual probes that are not connected directly to the controller and that receive the values directly from the supervisory system This method can be used to share the value read by generic probes installed in the system between various units in different sub networks This function is especially useful for ensuing the regular operation of the unit in the event of probe malfunctions The type of probe is assigned by each individual bit see diagram below e bit 0 Temperature probe e bit 1 Generic probe The difference between these configurations lies in the way that MPXPRO interprets the value send by the supervisor e bit 0 Temperature probe the value is read by the controller as a temperature probe and interpreted according to the unit of measure C or F set for parameter 5 In this mode the supervisory system must send the value of the variable according to the setting of 5 The various recording calculation or display operations are performed by MPXPRO in accordance with the unit of measure specified e bit 1 Generic probe the value is read and treated as a generic probe No conversion of the units is allowed during the
53. At the end of a network defrost the single slave unit can decide whether to wait for the end defrost signal from the master or end the defrost independently from the others e d2 0 end defrost independently e d2 1 end defrost on signal from master d4 Enable defrost on start up Code UOM Min Max Def d4 flag 0 1 0 Enable the activation of a defrost when the instrument is switched on e d4 0 defrost on start up not enabled e d4 1 defrost on start up enabled If enabled on the master this refers to a network defrost while on a slave it is only a local defrost The defrost on start up has priority over the compressor safety times d5 Defrost delay on start up if enabled Code UOM Min Max Def d5 min 0 240 0 This represents the delay that affects e the activation of a defrost after switching on the instrument e the activation of a defrost after the call signal from digital input e the enabling of the defrost from digital input It can be set differently on the master and the slaves to stagger the defrost start timed on the different units in the local network dC Time base for defrost Code UOM Min Max Def dC flag 0 1 0 This is used to modify the unit of measure used for the defrost parameters as per the table dl dP1 dP2 ddP dC 0 hours minutes dC 1 minutes seconds MPXPRO 030220186 rel 2 0 07 02 2008 53 C dl dPl Interval between consecut
54. Before activating a specific alarm MPXPRO enters a special status that depends on the type of alarm attempting to restore operation by modulating the electronic valve In these situations the LSH LSA MOP status of a unit and the simultaneous closing of the expansion valve 0 steps with hysteresis of 10 steps also closed the local solenoid while all controllers in the master slave sub network must be in these conditions to close the network solenoid valve 5 1 6 Hardware Hhu Hot wire PWM 1 and 2 activation time on period of 240 seconds Code UOM Min Max Def Hhu 0 240 240 This determines the percentage of activation of the output used for the anti sweat hot wire on the display cabinets trim heater It is a fixed parameter that is used to statically modulate the PWM output if available on the board in a maximum period of 240 seconds Default Hhu 240 s hot wire always active Htc Clock option fitted RTC Code UOM Min Max Def Htc a 0 0 Indicates whether or not the real time clock is fitted e Htc 0 the clock is not fitted e Htc 1 the clock is fitted Slf the parameter is set to 0 and the operator physically installs the optional real time clock board MX20P48500 when restarting the unit parameter is automatically set to 1 If set to 1 without the clock option being fitted the rtc alarm is activated tc Real Time Clock date time setting RTC This is used to set the date and ti
55. CCP alarms As well as the simple values described in the table all the intermediate combinations are also possible allowing more than one button to be disabled at the same time Example To disable UP and PRG set the corresponding bits to 1 bit2 and bit3 and therefore according to the previous table set H6 4 8 12 This will disable all the functions that can be activated or modified by at least one of the two buttons MPXPRO 030220186 rel 2 0 07 02 2008 39 C t1 Select display terminal p 22 A t Display alarms on second display p 38 A t2 Enable second display p 38 C d8 Alarm bypass after defrost and door open p 30 For further information see Chap 3 User interface p 16 A H2 Disable keypad functions p 39 For further information see Chap 3 User interface p 16 A Important display only C A4 A5 A10 A11 A12 Digital input configuration p 22 9 DI paragraph from the supervisor DI 1 aja jajn o gt 2 N 40 Hdn Number of sets of default parameters available display only Code UOM Min Max fos Hdn 0 0 6 MPXPRO as well as the standard configuration may feature a different set of parameters that can be loaded The set identified as 0 represents the set of parameters used by the instrument The additional sets 1 6 are different support sets saved in the memory that can be loaded when starting
56. G l x 10T60 C MXooogx M N O x 10T50 C Index of protection IP00 Operating humidity lt 90 RH non condensing Storage temperature 20170 C Storage humidity lt 90 RH non condensing Environmental pollution 2 normal PTI of the insulating materials printed circuits 250 plastic and insulating materials 175 Period of stress across the insulating parts Long Category of resistance to fire category D and category B UL 94 V0 Class of protection against voltage surges category Il Type of action and disconnection 1C relay contacts microswitching Construction of the control device integrated electronic control device Classification according to protection against electric shock Class 2 when suitably integrated Device designed to he hand held or integrated into equipment designed to be hand held no Software class and structure Class A Cleaning the front panel of the instrument only use neutral detergents and water Main and secondary display External Maximum distance between controller and display 10 m shielded cable power supply rx tx gnd LAN connection 50 m total shielded cable rx tx gnd Programming key Available in all models Dimensions mm 132 Fig 11 a Tab 11 a MPXPRO 030220186 rel 2 0 0702 2008 CAREL CAREL S p A Via dell Industria 11 35020 Brugine Padova Italy Tel 39 049 9716611 Fa
57. H2 3 settings from remote control H2 4 set F parameters DOWN UP defrost continuous cycle H2 5 set F parameters DOWN UP modify set defrost continuous point cycle H3 Remote control enable code Code UOM Min Max Def H3 0 255 0 00 enable from remote control without code H4 Disable buzzer on terminal Code UOM Min Max Def H4 flag 0 1 0 e H4 0 buzzer enabled e H4 1 buzzer disabled H6 Configure terminal keypad lock Code UOM Min Max Def H6 0 15 0 This is used to disable enable the individual buttons Unlike parameter H2 the value of H6 can deactivate all the functions accessible or modifiable using the specific button or a combination of buttons The buttons disabled depend on the binary representation of the value entered for the parameter with the individual button being activated deactivated based on the value of an individual bit e bit 0 button enabled e bit 1 button disabled bit number F135 2 1 0 decimal value El 4 2 1 button disabled PRG UP_ DOWN SET Disabling a button also disables all the functions accessible and or modifiable using that button accor ding to the following table Value Button _ Functions disabled H6 0 no function disabled H6 1 Set Multiplexed defrost H6 2 def Local and multiplexed defrost Vv H6 4 A Activate deactivate auxiliary output IK Continuous cycle H6 8 Prg Mute buzzer rs Reset HA
58. LA 72 LRA 8 0 Relay 3 EN60730 1 8 2 A 9 C UL 873 12 A 5 FLA 30 LRA 10 C ll ot used 12 O Relay 4 EN60730 1 6 4 A 13 C UL 873 8 A 2 FLA 12 LRA 14 0 Relay 5 EN60730 1 6 4 A 15 C UL 873 8 A 2 FLA 12 LRA 16 Tab 2 a Open collector PWM analogue output connections Terminal Function 7 12V Power supply 18 PWM1 Open collector PWM1 20 mA max 12 Vdc O 19 PWM2 Open collector PWM2 20 mA max 12 Vdc Tab 2 b Depending on the model the main board may have two open collector PWM analogue outputs for connecting SSR relay for the anti sweat heaters on the display ae Function Type of network cabinets hot wire 20 TX RX Supervisor network connection shielded cable RS485 Phase cutting controllers for inductive loads e g fans with 7 TURE inductive motors for opto isolated control 72 GND Phase cutting controllers for capacitive loads e g fans 23 MSN Connection to master slave LANM S N Master Sla HLAN network with BRUSHLESS motors for opto isolated control TX RX ve network shielded cable 26 GND 24 TU Connections on the MPXPRO display and tLAN terminals and display TX RX terminals T U I terminal user interface 25 VL 26 GND Tab 2 c Digital DI1 to DI5 and analogue inputs S1 to S7 Terminal Type of inputs Probe group 26 GND Multifunction digital input 27 DI5 28 5Vdc Multifunction digital input 4 29 S7 DI4 NTC probe PTC PT1000 35 IcnD 1 to 5 Vdc ratiometric probe power term 28 5 Vdc 0 to 10 Vdc
59. MPXPRO CAREL GED MPXPRO User manual ES THESE INSTRUCTIONS Technology amp Evolution User manual A IMPORTANT WARNINGS CAREL bases the development of its products on decades of experience in HVAC on the continuous in vestments in technological innovations to products procedures and strict quality processes with in circuit and functional testing on 100 of its products and on the most innovative production technology avai lable on the market CAREL and its subsidiaries nonetheless cannot guarantee that all the aspects of the product and the software included with the product respond to the requirements of the final application despite the product being developed according to start of the art techniques The customer manufactu rer developer or installer of the final equipment accepts all liability and risk relating to the configuration of the product in order to reach the expected results in relation to the specific final installation and or equipment CAREL may based on specific agreements acts as a consultant for the positive commissio ning of the final unit application however in no case does it accept liability for the correct operation of the final equipment system The CAREL product is a state of the art product whose operation is specified in the technical documen tation supplied with the product or can be downloaded even prior to purchase from the website www carel com Each CAREL product in relation t
60. O AUTO LO2 Low temperature alarm ref Intake probe if Double thermostat A ON O AUTO HI2 High temperature alarm ref Intake probe if Double thermostat A ON O AUTO IA Immediate alarm from external contact A ON 0 AUTO dA Delayed alarm from external contact A ON O AUTO dEF Defrost running 4 always on OFF OFF AUTO Edi Defrost on evaporator 1 terminated by timeout OFF OFF AUTO Ed2 Defrost on evaporator 2 terminated by timeout OFF OFF AUTO dor Door open for too long alarm A ON O AUTO Etc Real time clock fault O OFF OFF AUTO LSH Low superheat alarm A OFF OFF AUTO LSA Low suction temperature alarm A OFF OFF AUTO MOP Maximum operating pressure alarm A OFF OFF AUTO LOP Low suction temperature alarm A OFF OFF AUTO Edc Communication error with stepper driver A ON O AUTO EFS Motor controlled by the stepper driver broken or not connected A ON O AUTO EE Unit parameter flash error A OFF OFF AUTO EF Operating parameter EEPROM error A OFF OFF AUTO HA HACCP alarm type HA HACCP OFF OFF MAN HF HACCP alarm type HF HACCP OFF OFF MAN ret Instrument enabled for programming from the remote control OFF OFF AUTO Add Automatic address assignment procedure in progress __ OFF OFF AUTO AcE ae to ON OFF operation of the hot wire due to sensor missing or error di OFF OFF AUTO or the PI display cabinet defrost algorithm ccb Start continuous cycle call ccE End continuous cycle call dFb Start defrost call dFE End defrost call
61. OM Min Max Def O rH Maximum temperature C F Read only parameter rL Minimum temperature C F Displays the maximum rH and minimum rL temperature measured by the probe being monitored selected by par r5 6 7 3 Advanced alarms r3 Enable end defrost signal by timeout Code UOM Min Max Def 13 flag 0 1 0 If the defrost is set to end by temperature d0 0 1 this enabled the signalling of messages Ed1 and C amp do Select type of defrost p 29 Ed2 that indicate end defrost by timeout e 3 0 Ed1 and Ed2 disabled e r3 1 Ed1 and Ed2 enabledi AL2 Low temp alarm threshold on intake probe Sr Double thermostat only Code UOM Min Max Def AL2 C F 50 0 50 0 0 0 C AL AH Low temperature alarm threshold High In Double Thermostat mode parameter AL high temperature alarm threshold refers to the outlet probe temperature alarm threshold p 33 Sm only AL2 is identical to this for the intake probe Sr AH2 High temp alarm threshold on intake probe Sr Double thermostat only Code UOM Min Max Def AH2 SCE 50 0 50 0 0 0 A Double thermostat p 42 In Double Thermostat mode the parameter AH high temperature alarm threshold refers to the outlet probe Sm only AH2 is identical to this for the intake probe Sr C AL AH Low temperature alarm threshold High Ar Enable alarms to be sent from slaves to master temperature alarm threshold p 33 Code UOM Min Max Def
62. OXG6300 MPXPRO display green LED no options without IR without commissioning ROOUGC200 Terminal green LED full optional IR commissioning ROOXGC200 Display green LED full optional IR commissioning ROOUG6200 Terminal green LED no options without IR without commissioning ROOXG6200 Display green LED no options without IR without commissioning MX20P48500 MPXPRO OPTION RS485 RTC MODULE TRADRBE240 Transformer for DIN 230Vac 24Vac 20VA with fuse carrier TRA00BE240 Transformer for PANEL 230Vac 24Vac 20VA with fuse carrier ROPZTLNOO Commissioning interface USB tLAN ROPZPRGOO Programming key interface USB I2C MXOPZKEYAO MPXPRO parameter programming key Tab 1 d 10 MPXPRO 030220186 rel 2 0 07 02 2008 2 MECHANICAL AND ELECTRICAL INSTALLATION The following paragraphs illustrate the assembly procedures and the electrical connections for the MPXPRO board and the MX2OPSTP MX2OPPWM MX2OPA100 expansion boards 2 1 Removing the top and side covers A Important The assembly operations must be performed with the board discon nected from the power supply Fig 2 a removing the top cover O press sideways remove the cover Fig 2 b removing the side cover D press the cover sideways at the hinges remove the cover Fig 2 b MPXPRO 030220186 rel 2 0 07 02 2008 Il 2 2 MX20 board wiring diagram and connections The diagram refers to a full optional board
63. Parameter SI Standard NTC P1 0 Outlet temp FA S2 Defrost temp Fb 2 S3 Intake temp F3 S4 Standard NTC P2 0 Intake temp Fd 4 S5 Digital inpu Day night A5 7 S6 0 to 5 V ratiometric_ P3 4 Evaporation pressure FEE6 Tab 6 c electronic expansion valve selenoide valve A P15 EEV Main Support saturated temp in the event of pressure probe error p 47 A c1 c7 Calibration S1 S7 p 38 A Po5 Saturated evaporation temperature probe calibration p 38 Fig 6 b MPXPRO 030220186 rel 2 0 07 02 2008 N FG FH C1 to C7 Parameter Probe Ja SI JQ S2 1B S 1G S4 1G S5 C6 S6 Ja S7 N Important e The calibration parameters are only active for probes set for temperature measurements e If the probe is not suitably configured the calibration parameters show the message ___ If there is a probe error the display shows the specific error message for the probe 38 6 1 6 Probe and saturated evaporation temperature calibration MPXPRO can adjust the values read by the probes and some of the internal variables In particular c1 to c7 are used to increase or decrease the values read by the physical probes if configured as temperature probes Parameter Po5 on the other hand corrects the value of th
64. S8 tE1 tE8 Start day details time band 1 to 8 end day time band 1 to 8 H8 Select output switched with time bands Light and Aux Tab 5 a 5 1 2 Temperature probe configuration FA Fb Fc Assign temperature probes Name UOM Min Max Def FA___ Assign outlet temperature probe Sm 0 Il 1 Fb___ Assign defrost temperature probe Sd o i h Fc___ Assign intake temperature probe Sr 0 u 3 Tab 5 b MPXPRO inside the refrigerated cabinet or the cold room can use temperature probes to measure e the air outlet temperature at the evaporator outlet e the defrost temperature in contact with the evaporator e the air intake temperature at the evaporator inlet The default configuration for the assignment of the probes typical for CAREL controllers is the following e S1 Outlet probe Sm e S2 Defrost probe Sd e S3 Intake probe Sr The default configuration also includes three standard CAREL NTC probes Other types of probes can also be connected setting parameter P1 if the product code allows MPXPRO allows the default settings to be changed and the function associated with the probes to be se lected In particular parameters FA Fb Fc are used to assign the cabinet and or cold room temperature probes e FA Outlet temperature Sm e Fb Defrost temperature Sd e Fc Intake temperature Sr MPXPRO 030220186 rel 2 0 07 02 2008 21 Note To simplify understanding the basic an
65. activates a control action in addition to normal control with the aim of closing the electronic valve more quickly In practice the intensity of the system reaction is increased If the device remains in low superheat status for a certain period a low superheat alarm is activated with the display showing the message LSH The low superheat signal features automatic reset when the condition is no longer present or the controller is switched off standby When low superheat status is activated the local solenoid valve can be forced closed parameter P10 Overheating Low SH correction of the low overheating TiLowSH in addition to the PID Low overheating f status 1 Time out Low SH i l Automatic reset LSH alarm i l Fig 6 i P7 EEV LSH Low superheat threshold Code UOM Min Max Def P7 K 10 0 P3 70 This represents the absolute threshold for the activation of the low superheat function P8 EEV LSH Low superheat integration time Code UOM Min Max Def P8 S 0 240 15 This represents the integration time for the low superheat protection It is implemented in parallel with the integration time used during normal control To this must be set to lower values so as to determine a faster reaction of the electronic valve P8 0 gt low superheat protection and alarm disabled P9 EEV LSH Low superheat alarm delay Code UOM Min Max Def P9 S 0 999
66. al alarm not active The activation of the alarm causes e the message IA to be shown on the display and the A icon to flash e the activation of the buzzer to modify this function see advanced parameter H4 e the activation of the alarm relays if configured see basic parameters H1 H5 H7 e the deactivation of the compressor solenoid output to modify this function see advanced parameter Note the activation of the external alarm shuts down the fans only if these follow the status of the compressor output as set using basic parameter F2 The shutdown of the compressor due to an external alarm ignores the compressor ON time advanced parameter c3 A4 A5 A10 A11 A12 2 Delayed external alarm display only The operation of this alarm depends on the setting of parameter A7 external alarm delay e A7 0 signal only alarm on the display no change to the normal operation of the controller default e A7 0 alarm similar to the immediate external alarm the activation is delayed by the time set for A7 A4 A5 A10 A11 A12 3 Enable defrost lt defrost not enabled inhibited defrost enabled This is used to disable any defrost calls When the contact is open all the defrost calls are ignored Note e if the contact is open while a defrost is in progress this is immediately stopped wm flashes on the display indicating the defrost call is active this starts again when the contact closes e This function may be useful to pr
67. all the modifications have been made to permanently save the new values assigned to the parameters press PRG for 5 seconds To ignore the modifications wait 60 seconds without pressing any button TIMEOUT DI 3 3 4 Copy parameters from master to slave Upload All the parameters can be uploaded from a master unit to the slave units in the sub network This pro cedure can be used instead of the programming key with the advantage of being able to update all the slave boards in the sub network at the same time rather than having to do it individually for each board with the programming key Procedure 1 Access the Copy parameters from master to slave menu see Table 3 b Functions and associated buttons 2 Scroll the list of units available using UP or DOWN 3 Press SET to select the desired unit Selecting ALL means all the slave units in the sub network will be programmed 4 During the programming process the display on the terminal shows the normal display alternating with the message uPL and the A icon comes on 5 Once the programming procedure is complete the message uPL disappears and the A icon goes off In the event of errors the message uPX is displayed X number of the slave unit where the error occurred 3 3 5 Alarm log Below are the instructions for managing the alarms saved by MPXPRO 1 Access the Alarm log menu see Table 3 b Functions and associated buttons 2 If using a mas
68. amater first start up e set the parameter upload attributes e write and read the parameters from to a file e check the parameters 7 2 Commissioning VPM Visual Parameter Manager MPXPRO can communicate directly with a PC using the commissioning port This connection can be used to program and check the operation of an MPXPRO controller from the PC when installing and first starting the system The commissioning connection can be used to e Set the values visibility and download attributes of all the parameters including the unit parameters Completely program a key e During start up monitor and manually control all the inputs outputs e Update the firmware MPXPRO 030220186 rel 2 0 07 02 2008 61 Fig 7 b UPLOAD Fig 7 c DOWNLOAD OFF o Fig 7 d EXTENDED DOWNLOAD ON Fig Ze TERMINAL CONVERTER si ra a tLAN USB commissioning cable PC SS Fig 7 f USB Fig 7g ith the MPXPRO board see p 12 gt 62 A PC can access the commissioning connection via e The special port available on some terminals displays e The RS485 supervisory network The commissioning software can also be used to program the key Further information regarding the operation of the commissioning software is available in the online manual VPM 030220890 e Commissioning via terminal
69. analogue input external p s 4 to 20 mA analogue input external p s 28 5Vdc Multifunction digital input 3 30 GND NTC probe PTC PT1000 31 S6 DI3 0 to 5 Vdc ratiometric probe power term 28 5 Vdc N 30 GND Multifunction digital input 2 32 55 Di2 NTC probe PTC PT1000 Important e 5 54 DII All the contacts should be galvanically insulated by adding 34 GND NIC probe PTC PTioco i H Pep tor ach conati 35 53 e digital inputs must not be connected in parallel othe 36 S2 rwise the board may be damaged 37 SI Tab 2 d N B The devices with 4 to 20 mA or 0 to 10 output Vdc connected to input S7 cannot be powered directly from the MPXPRO They therefore require an appropriate external power supply Important The type of input connected to each probe in the same group can be configured by just one parameter Consequently for group 1 for example there is just one parameter that defines the type of input and that must therefore be the same for all the probes in the same group For group 2 despite there being just one parameter mixed combinations are possible excepting different types of temperature probes on the two inputs MPXPRO 030220186 rel 2 0 07 02 2008 13 2 3 Stepper EEV expansion board wiring diagram MX20PSTP i The input 0 to 10 Vdc must feature reinforced insulation with reference A i to its internal power supply i Important q before installing the expansion board di
70. arameters available Virtual digital input A8 Configure function of virtual digital input A9 Select digital input propagated from master to slaves 34 MPXPRO 030220186 rel 2 0 07 02 2008 6 1 2 Password MPXPRO features three types of password for accessing three different menus PS configuration parameters PSA advanced parameters PSS alarm log PSU upload parameters Code UOM Min Max Def PS 0 200 22 PSA 0 200 PS 11 PSS PS 200 PS 22 PSU PS 200 PS 44 The passwords can only be displayed on the user terminal while they can be modified only from the supervisor programming key and commissioning tool Note The structure of the passwords requires only PS to be set while the other values are determined automatically e PSS PS 22 e PSU PS 44 6 1 3 Analogue inputs MPXPRO features 7 configurable analogue digital inputs S1 to S7 up to 4 serial probes that can be set directly from the supervisory system and the possibility of sharing the pressure probe connected to the master with all the units present in the master slave LAN In particular this paragraph explains all the settings required to modify the default configuration relating to the types of probes connected plus the other information needed for correct operation P1 P4 Select type of probes groups 1 to 4 S1 to S7 DI1 to DI4 The following table summarises the types of probes compatible with MPXPRO and the rela
71. are used parameters to set the functions of the digital inputs Parameter DI A4 DI A5 DI2 A10 DIS All DI4 Al2 DIS Tab 5 e For the configuration of the virtual digital input refer to parameters A8 and A9 The possible functions are identical for each digital input A4 A5 A10 A11 A12 Digital input configuration Parameters modified from version 1 2 Code Name UOM Min__ Max Def A4 Configure function of digital input DI1 on S4 0 8 0 A5 Configure function of digital input DI2 on S5 0 8 0 A10 Configure function of digital input DI3 on S6 0 8 0 All Configure function of digital input DI4 on S7 0 8 0 Al2 Configure function of digital input DI5 0 8 0 Tab 5 f Below is the list of the functions that can be associated with each individual digital input A4 A5 A10 All A12 Function lt N 0 default Input not used 1 Immediate external alarm Active Inactive 2 Delayed external alarm display only Active Inactive 3 Enable defrost Not active Active 4 Defrost call Not active Active 5 Door switch Door open Door closed 6 Remote ON OFF OFF ON 7 Curtain switch light Day status Night status 8 Continuous cycle Inactive Active Tab 5 g MPXPRO 030220186 rel 2 0 07 02 2008 Input not used default A4 A5 A10 A11 A12 0 Immediate external alarm A4 A5 A10 A11 A12 1 Pai immediate external alarm active YI immediate extern
72. as d 29 generated on 29 August 2003 at h 19 19 44 and lasted 298 minutes n_ 44 298 HFn Number of HF alarms Code UOM Min Max Def HFn 0 15 Indicates the number of HF alarm events A maximum of 15 alarms can be saved while only the last 3 can be viewed in detail HF HF1 HF2 Read only parameter 60 MPXPRO 030220186 rel 2 0 07 02 2008 7 PROGRAMMING KEYS AND COMMISSIONING TOOL From version 2 0 MPXPRO step 2 is only compatible with the key code MXOPZKEYAO Previous versions are only compatible with IROPZKEYAO Parameters cannot be copied between the two versions The programming key codes MXOPZKEYAO can be used to copy the complete set of parameters values visibility possibility to upload from and to an MPXPRO controllers The commissioning tool on the other hand is software used to program manage and monitor the complete status of the MPXPRO series controllers This software is especially useful when first starting the instrument by connecting the controller user terminal directly to a PC 7 1 Programming keys MXOPZKEYAO The programming keys MXOPZKEYAO Fig 7a and 7b are used to copy the complete set of MPXPRO parameters The keys must be connected to the connector 4 pin AMP fitted on the compatible controllers without powering the controller and can manage up to 6 different sets of parameters on the instrument The two dipswitches provided accessible on removing the batter
73. ater sensitivity to disturbance e High values on the other hand mean a lower frequency and consequently greater stability of the measurement together with greater immunity to disturbance ro Control offset in the event of probe error Code UOM Min Max Def ro C F 0 0 20 0 0 0 In the standard mode MPXPRO uses the virtual probe Sv as the control probe see basic parameter 4 In the event of errors or breakage of one of the two probes making up the virtual probe outlet or intake probe parameter ro is used to continue normal operation in controlled conditions without requiring immediate service by maintenance personnel The recommended value of ro is the difference between the outlet probe and intake probe temperature readings in stable operation of the refrigeration unit ro Sr Sm If ro 0 the function is not active In the event of an error on the outlet probe Sm MPXPRO starts control based solely on the intake probe Sr considering a new set point St determined by the following formula st astiro OA If the error is on the intake probe Sr on the other hand control is performed solely on probe Sm consi dering the new set point St St eee 100 This function remains active until the errors have been resolved If on the other hand both temperature probes are faulty duty setting mode is activated see advanced parameter c4 In night status when suitably configured MPXPRO may use the i
74. be connected len RS485 on RS485 T Shield E NTC RATIOMETRIC w Master Slave network max 10 meters between controllers O z e z e Terminal user interface max 10 meters complete line IR U IR X PROBE Sm DEFROST TEMPERATURE PROBE Sr PROBE Sm AIR ON TEMPERATURE tLAN PROBE TsuctEEV NTI n c 2 lt oc a T E O a Possible connection S4 a gt ool SUCTION TEMPERATURE EVAPORATION PRESSUR PROBE T PsatEEV GNI Connection VE 25 GND 26 see the technical gaa ae tae aaa alia TULL Tx Rx 24 leaflets 050000135 E SAN Use only one ie Pressure probe connection A pressure probe ae i Connect with CAREL cable aS ga i SPKC003310 or SPKC005310 Dis GN 1 2 s i 31 30 29 28 1532 al connection with E m m m LESE Terminal Colour Green l Black e 28 5Vdc Black 29 7 D14 White i 30 GND Green 31 S6D13 White CAREL electronic press probe Range CAREL code barg Ref probe i min max becouse Lucaceneasilozliconel tose coke SPKTOO53RO 1 0 4 2 2CP5 52 SPKTOOISRO 1 0 9 3 2CP5 46 SPKTO043RO 0 0 17 3 52CP36 01 2CP5 66 SPKT0033RO 0 0
75. be error enabled Default d12 0 during defrost supervisor pressure probe refresh enabled Po4 and pressure probe error disabled MPXPRO 030220186 rel 2 0 07 02 2008 9 ALARMS AND SIGNALS 9 1 Alarms and signals display buzzer and relay Note The buzzer is activated if enabled by parameter H4 The alarm relay is activated if one of the outputs auxiliary 1 auxiliary 2 or auxiliary 3 H1 H5 and H7 has been assigned o the alarm relay function normally closed or normally open Code Description Icon on display flashing Alarm relay Buzzer Reset rE Virtual control probe fault A ON O AUTO EI Probe S1 fault A OFF OFF AUTO E2 Probe S2 fault A OFF OFF AUTO E3 Probe S3 fault A OFF OFF AUTO E4 Probe S4 fault A OFF OFF AUTO E5 Probe S5 fault A OFF OFF AUTO E6 Probe S6 fault A OFF OFF AUTO E7 Probe S7 fault A OFF OFF AUTO E8 Serial probe S8 not updated A OFF OFF AUTO E9 Serial probe S9 not updated A OFF OFF AUTO E10 Serial probe S10 not updated A OFF OFF AUTO E11 Serial probe S11 not updated A OFF OFF AUTO eno Probe not enabled OFF OFF AUTO LO Low temperature alarm ref Outlet probe if Double thermostat A ON O AUTO HI High temperature alarm ref Outlet probe if Double thermostat A ON
76. c 0 0 100 0 compressor valve always OFF 100 compressor valve always ON cc Duration of continuous cycle operation _ 43 hours C 1 0 15 c6 Low temperature alarm bypass time after continuous cycle 43 min C 60 0 240 Defrost management parameters dEF Select type of defrost do 0 heater defrost by temperature 3 hot gas defrost by time 29 i c 0 0 4 1 hot gas defrost by temperature 4 heater defrost by temperature and time 2 heater defrost by time __ d2 Enable end defrost synchronised by Master 53 fla c 1 0 1 0 end defrost not synchronised 1 end defrost synchronised 8 dl Maximum interval between consecutive defrosts 29 hours C 8 0 240 dt End defrost temperature read by Sd 29 CPF C 8 0 50 0 50 0 dt2 End defrost temperature read bySd2 54 CEE C 8 0 50 0 50 0 dP1 Maximum defrost duration 30 min C 45 1 240 dP2 Maxim um defrost duration on second evaporator 54 min C 45 1 240 Enable defrost on start up d4 0 defrost on start up disabled gt flag c i i l d5 Defrost delay on start up if enabled 53 min C 0 0 240 Select display on terminal during the defrost de 0 temperature alternating with dEF on both displays 3g g c 1 0 gt 1 both displays off 2 dEF fixed on both displays _ dd Dripping lime fter defrosting fans off 54 min 2 0 15 Enable Skip defrost jep E 0 Skip defrost disabled __ LARIO d8 High temperature alarm bypass time after defrost and door open 30 min C 30 0 240 x ao Disable defrost priority over
77. connected to the door switch see basic parameters A4 A5 A10 A11 A12 In an alarm situation when d8 expires the alarm is signalled after the time set for A6 d8 0 immediate alarm td1 to td8 Defrost events 1 to 8 Code Description Sub parameter UOM Min Max Def td1 td8 Details of defrost events 1t08__ d day 0 1 0 h hour 0 23 0 n min 0 59 0 p flag 0 1 0 Tab 5 t Note the attribute P determines a power defrost see Chap 6 advanced parameters power defrost This function is disabled by defaul MPXPRO manages up to 8 defrost time bands each of which can be set at a precise moment day hour and minute To set a defrost time band e identify a defrost band e g td1 and press SET e set the parameters day d hours h minutes m using UP or DOWN and press SET to tempora rily save the setting e at the end of the operation press PRG to confirm and save Sd1 Display defrost probe Parameters modified from version 2 0 Code UOM Min Max Def Sdi CPF z z z Parameter that displays the value measured by the defrost probe Sd if fitted and configured Otherwise three horizontal dashes ___ are displayed Important the default values d 0 h 0 m 0 indicate no defrost is programmed 5 4 Fans MPXPRO manages the activation and deactivation of the fans in relation to the operation of the system normal operation defrost dripping
78. d MPXPRO 030220186 rel 2 0 0702 2008 6 5 Defrost This section describes the advanced functions concerning the defrost 6 5 1 List of parameters 6 5 2 General parameters 6 5 3 Second evaporator 6 5 4 Special functions e Skip Defrost e Running Time e Sequential Stops e Power Defrost 6 5 1 List of parameters Code Parameter General parameters d2 Enable end defrost synchronised by Master d4 Enable defrost on start up d5 Defrost delay on start up if enabled dC Time base for defrost dd Dripping time after defrosting fans off Second evaporator Sd2 Display second evaporator defrost probe dt2 End defrost temperature read by Sd2 dP2 Maximum defrost duration on second evaporator Special functions Skip Defrost d7 Enable Skip defrost dn ominal duration of the defrost in Skip defrost mode Running Time d10 Defrost time in Running time mode dil Defrost temperature threshold in Running time mode Sequential Stops dS1 Compressor off time in Sequential stop defrost mode dS2 Compressor operating time in Sequential stop defrost mode Power Defrost ddt Additional end defrost temperature delta in Power defrost mode ddP Additional maximum defrost time delta in Power defrost mode 6 5 2 General parameters d2 Enable end defrost synchronised by Master Code UOM Min Max Def d2 flag 0 1 1
79. d advanced parame ters are highlighted by references shown on the side of the page For example if the text refers to parameter FA the following reference will be shown on the side of the page C FA p 21 Default configuration A P1 general configuration analogue inputs p 35 Sm FA Regulation probe parameters A Important Check the technical specifications of each input in relation to the application that is being implemented before setting the parameters A t2 Select display on secondary terminal p 38 A A8 A9 Configure function of virtual digital input Select digital input propagated from Master to Slaves p 40 22 MPXPRO can manage a maximum of 11 analogue probes 7 can be physically connected to the device and 4 serial probes via the master slave network The possible configurations of the parameters and the corresponding meanings are shown in the following table FA Fb Fc_ Probe associated 0 No probe associated with the function probe not present 1 S1 default FA 2 S2 ical Fb 3 S3 default Fc 4 S4 5 S5 6 S6 7 S 8 S8 serial probe 9 S9 serial probe 10 S10 serial probe Il 511 serial probe Tab 5 c The default values of parameters FA Fb Fc identify a typical application that uses three temperature probes to control the temperature inside the cabinet There are cases however in
80. d hold the PRG button after having set all the parameters displayed In fact each individual parameter must be selected using the SET button the value set correctly using UP or DOWN and saved by pressing the SET button again The configuration procedure is simplified by the icons being shown on the display corresponding to each parameter that has not yet been set Only when all the parameters have been set and consequently the icons corresponding to all the start up parameters are off will it be possible to exit this procedure 4 5 Exceptions As already mentioned this procedure is especially useful when starting and programming the installation directly Nonetheless the list of parameters displayed can be changed and or the procedure disabled by programming the parameters via programming key or commissioning tool For further information see to the documents on the commissioning tool MPXPRO 030220186 rel 2 0 0702 2008 5 BASIC FUNCTIONS MPXPRO features a vast range of applications and functions for the control and management of refrigeration units To simplify the use of the functions available two levels have been identified e C Basic simple standard functions Type F and C parameters e AS Advanced complex applications and functions reserved for expert users see Chap 6 Advanced functions p 34 Type A parameters The basic functions described in this chapter include the typical parameters for entry level us
81. ds the sum of the set point St and the differen tial rd gt control ON If the temperature measured is less than the set point St gt control OFF In the transitions within the band set by rd the controller remains in the previous status Low values of rd mean e Precise control e High switching frequency control On Off High values of rd mean Less precision e Low switching frequency control On Off in response to minimum deviations in the temperature For further information on the compressor protection parameters see the compressor parameters chapter 6 Advanced functions MPXPRO 030220186 rel 2 0 07 02 2008 C H8 Select output switched with time bands light and AUX p 27 C r4 and r6 Automatic set point variation in night status Enable control on intake probe Sr at night p 28 A Important day active AUX inactive attiva LIGHT active inactive C H1 H5 H7 Conf A Advanced control parameters p 34 ON OFF St Fig 5 c igurazione funzioni uscite AUX p 24 Sreg Advanced functions Double thermostat p 42 A Advanced compressor functions p 51 27 C r6 Enable control on intake probe Sr at night p 28 Example 4 50 Sv Sm 100 50 Sr e 50 _ Sm Sr 100 2 Example 4 75 Sm 100 75 Sre75_ 1 3 Sv gsm H 4 Sr C A4 A5 A10 A11 A12 Digital input configuration p 22 C tS1 188 tE1 tE8 Day and nig
82. e Code UOM Min Max Def P5 S 0 900 150 This represents the time required by the controller to balance the difference between the set point and the actual superheat It practically limits the number of steps that the valve completes each second It is MPXPRO 030220186 rel 2 0 07 02 2008 47 A P10 Enable close solenoid valve for low superheat LSH and or low suction temperature LSA p 49 48 only valid during normal control the special functions in fact have their own integration time High values gt slow and less reactive e g 400 for CO carbon dioxide applications Low values gt fast and reactive valve P5 0 integration action disabled P6 EEV PID Derivative time Code UOM Min Max Def P6 S 0 0 100 0 5 0 This represents the reaction of the valve to variations in the superheat It amplifies or reduces variations in the superheat High values gt fast variations Low values gt limited variations P6 0 gt differential action disabled Example For CO carbon dioxide applications P6 5 6 3 5 Safety functions and alarms e LSH Low superheat To prevent too low superheat values that may cause the return of liquid to the compressor or system instability swings a low superheat threshold can be defined below which a special protection function is activated When the superheat falls below the threshold the system immediately enters low superheat status and
83. e of the controller These involve 5 1 5 1 General configuration I O hardware and LAN 5 2 Control set point 5 3 Defrost 5 4 Fans 5 5 Temperature alarms 5 1 General configuration The following paragraph describes the basic configurations relating to 5 1 2 Temperature probes 5 1 3 Digital inputs 5 1 4 Auxiliary outputs 5 1 5 LAN 5 1 6 Hardware 5 1 1 List of parameters Code Parameter Temperature probes FA Assign outlet temperature probe Sm Fb Assign defrost temperature probe Sd Fc Assign intake temperature probe Sr tl Select display on the main terminal Digital inputs A4 Configure function of digital input DI1 on 4 A5 Configure function of digital input DI2 on S5 A10 Configure function of digital input DI3 on S6 All Configure function of digital input DI4 on S7 Al2 Configure function of digital input DIS A7 Delay time for delayed external alarm Auxiliary outputs H1 Configure function of AUX1 output H5 Configure function of AUX2 output H7 Configure function of AUX3 output H9 Select function associated with the AUX button Light or AUX LAN In Select type of unit MASTER or SLAVE Sn Number of slaves in the local network Ho Serial address r7 Enable solenoid output on the Master as sole LAN solenoid Hardware Htc Clock option fitted tc RIC date time setting tS1 t
84. e saturated evaporation temperature calculated directly based on the evaporation pressure The serial probes cannot be calibrated while the probes shared with the master are calibrated by the master c1 c7 Calibration of probes S1 to S7 cannot be uploaded Code UOM Min Max Def cl 7 C F or barg 20 0 20 0 0 0 These correct the reading made by probes S1 to S7 respectively see the table to the side so that MPXPRO considers the value read increased or decreased by the set value as the effective value The table to the side shows the association between parameter calibrated probe the virtual sensors S8 to S11 do not require calibration Calibration is performed before checking if the value if out of range that is MPXPRO first determines the values read by the probes correcting them based on the calibration parameters then checks if these are outside of the range specified and where necessary generates a probe error Example To decrease the temperature measured by sensor S1 by 3 C set cl 3 cE Saturated evaporation temperature calibration Parameters modified from version 2 0 Code UOM Min Max Def cE F 20 0 20 0 0 0 To calibrate the value of the saturated evaporation temperature enter the offset value for this parameter The action of this parameter is similar to the ones described above 6 1 7 LAN and Hardware Below are the parameters corresponding to the advanced configuration of
85. ed E6 Probe S6 fault unvaried unvaried unvaried unvaried DI E Probe S7 fault unvaried unvaried unvaried unvaried V ES Serial probe S8 not updated Duty setting c4 unvaried unvaried unvaried DI Eo Serial probe S9 not updated Duty setting c4 unvaried unvaried unvaried NI E10 Serial probe S10 not updated Duty setting c4 unvaried unvaried unvaried V Ell Serial probe S11 not updated Duty setting 4 unvaried unvaried unvaried DI Se Probe not enabled unvaried unvaried unvaried unvaried V LO Low temperature alarm ref Outlet probe if Double unvaried unvaried unvaried unvaried thermostat HI High temperature alarm ref Outlet probe if Double unvaried unvaried unvaried unvaried V thermostat LO2 Low temperature alarm ref Intake probe if Double unvaried unvaried unvaried unvaried N thermostat HI High temperature alarm ref Intake probe if Double unvaried unvaried unvaried unvaried V thermostat IN mmediate alarm from external contact duty setting A6 unvaried unvaried unvaried V dA Delayed alarm from external contact duty setting A6 if unvaried unvaried unvaried V ATO dEF Defrost running unvaried unvaried unvaried unvaried DI Ed1 Defrost on evaporator 1 ended by timeout unvaried unvaried unvaried unvaried Vy Ed2 Defrost on evaporator 2 ended by timeout unvaried unvaried unvaried unvaried V dor Door open for too long alarm u
86. ed using the commissioning tool or programming key In this mode modulation can also be managed using the open collector PWM outputs The modulation management algorithm is independent of the output used 56 MPXPRO 030220186 rel 2 0 07 02 2008 F5 Fan cut off temperature hysteresis 1 C Code UOM Min Max Def F5 F FI 50 0 50 0 This represents the temp threshold above which the fans are stopped with speed control F6 F7 Maximum and minimum fan speed Parameters modified from version 2 0 Code UOM Min Max Def F6 maximum F7 100 100 F7 minimum 0 F6 0 These represent the maximum speed F6 and minimum speed F7 of the fans expressed as a of the output Their meaning depends on the type of output used e Oto 10 V the output voltage at maximum or minimum speed e PWM maximum or minimum portion of the semi wave applied to the load F8 Fan peak speed time Code UOM Min Max Def F8 S 0 240 0 When fans are started this sets the operating time at maximum speed The function is especially useful to overcome the mechanical inertia of the motor when starting F8 0 speed always managed by the controller F9 Select fan control with PWM output1 2 with phase cutting speed control Code UOM Min Max Def F9 flag 0 1 1 If controlled via a PWM output this indicates the type of control used F9 0 control by duration for inductive loads F9 1 control by pulse
87. ef dS2 min 0 240 120 This represents the value initial counter starting time in relation to the control operating time after which a natural defrost is performed in sequential stops mode dS2 is only active if dS1 0 C dt1 dP1 End defrost temperature Maximum e Power defrost defrost duration p 29 Power defrost is a special function on the MPXPRO that increases the end defrost threshold dt1 dt2 for A dt2 dP2 End defrost temperature Maximum the second evaporator and or the maximum defrost duration dP1 dP2 for the second evaporator The defrost duration second evaporator p 54 se increases allow longer and more effective defrosts Power defrosts are performed upon each defrost C td1 td8 Defrost events 1 to 8 p 30 call in night status or when suitably configured by the RTC parameters td1 to td8 to allow the user to choose the most suitable conditions for this special procedure Power Defrost is enabled when at least one of the set increases ddt or ddP is other than zero ddt Additional end defrost temperature delta in Power defrost mode Code UOM Min Max Def ddt Q F 20 0 20 0 0 0 This sets the temperature value that is added to the end defrost threshold dt1 dt2 for the auxiliary evaporator Example ddt 0 C increased threshold not active in Power defrost ddP Additional maximum defrost time delta in Power defrost mode Code UOM Min Max Def ddP min 0 60 0
88. en successive starts Q Minimum off time 3 Minimum on time d9 Disable defrost priority over solenoid times A6 Configure solenoid control during external alarm immediate or delayed 6 4 2 General functionsi cO Enable compressor and fan delay on power up Code UOM Min Max Def co min 0 240 0 This is used to set a minimum activation delay of the compressor control output after switching on the instrument In a system with multiple compressors cO can be set to stagger the starts of the compressors see Fig 6 k This prevents the compressors from starting too close together in the case of frequent power failures The delay if enabled naturally also affects the activation of the output fans if suitably configured c1 Minimum time between successive starts Code UOM Min Max Def cl min 0 15 0 This establishes the minimum interval between two consecutive activations of the compressor regardless of the temperature and the set point Each start call in this period will be postponed until the delay elapses see Fig 6 1 c2 Minimum off time Code UOM Min Max Def 2 min 0 15 0 This establishes the minimum interval between when the compressor stops and starts again During this interval the compressor will remain off regardless of the temperature and the set point see Fig 6 m Parameter c2 is useful for balancing the pressure after the compressor stops in systems with hermetic and capil
89. entage of the maximum duration dP1 and dP2 below which the next defrosts are skipped This function observes the following rules e If the duration of the current defrost is less than dn the next defrost is skipped e If when the next defrost is performed the duration is still less than dn then two consecutive defrosts are skipped e This procedure is repeated until reaching a maximum of three defrosts the fourth is always performed e On power up the control always performs the first 7 defrosts Below is an example of the sequence Defrost dE lt dn dE lt dn dE lt dn Manual dl dl dl dl dl dl dl di dl dl time defrost not performed 2 defrost not performed 3 defrost not performed Fig 6 0 The figure shows an example in which the defrost is activated based on the cyclical parameter dl Naturally this function is enabled for all possible activations apart from the defrost from keypad or supervisor and these are always performed regardless of this function Skip Defrost is not recommended for programmed defrosts as important defrosts may be skipped before long periods in which no defrost is programmed MPXPRO 030220186 rel 2 0 0702 2008 d7 Enable Skip defrost Code UOM Min Max Def d7 flag 0 1 0 Enable Skip defrost function e d7 0 Skip defrost disabled e d7 1 Skip defrost enabled dn Nominal d
90. er failures Recommended CAREL codes TRADRBE240 20 VA transformer DIN rail TRA00BE240 20 VA transformer panel EVBAT00300 Optional battery kit Installation notes MPXPRO is designed to manage one electronic expansion valve that controls the flow of refrigerant inside an individual evaporator Two evaporators in parallel cannot be managed with just one electronic expansion valve e The NTC PTC PT1000 temperature probe must be installed near the evaporator outlet according to the standard installation methods see the installation notes on the E2V instruction sheet Suitable thermal insulation is recommended CAREL offers special types of probes designed to simplify installation in contact with the refrigerant pipe NTCO30HFO1 for Retail use IP67 3m 50T90 C 10 pcs NTCO6OHFO1 for Retail use IP67 3m 50T90 C 10 pcs e To measure the saturated evaporation temperature different types of probes can be used in particular the following can be configured advanced parameter FE 0 to 5 V ratiometric pressure probe NTC PTC PT1000 temperature probe Active 4 to 20 mA pressure probes powered externally CAREL recommends the use of the following ratiometric probes SPKTO053RO 0 to 5Vdc 1 to 4 2 bar for LT circuits SPKTOO13RO 0 to 5Vdc 1 to 9 3 bar for MT circuits NB MPXPRO can measure the saturated evaporation temperature using a normal NTC PTC PT1000 tem perature probe see price list This solution even if eco
91. essssssesnsssee 59 7 PROGRAMMING KEYS AND COMMISSIONING TOOL 61 71 Programming keys MXOPZKEYAO i 61 72 Commissioning VPM Visual Parameter Manager i 61 8 NEW VERSION V2 AVAILABLE 63 8 1 Compatibility with previoUS VErSIONS ssssssesssseesssssessssssssssessesssessssssessasesnsssesisaseesnnssen 63 8 2 Description of the NEW FUNCTIONS ssssssssessesesussseesssssessssesssnsssussesssusssssussasssnsnsessesessnnssees 63 9 ALARMS AND SIGNALS 67 9 1 Alarms and signals display buzzer and relay sssssssssssessssssssussssssssssssssassessssessessesssssen 9 2 Table of alarms and signals functions enabled disabled 10 TABLE OF PARAMETERS 69 11 TECHNICAL SPECIFICATIONS 73 MPXPRO 030220186 rel 2 0 07 02 2008 5 6 MPXPRO 030220186 rel 2 0 07 02 2008 1 INTRODUCTION 1 1 MPXPRO MPXPRO is the CAREL product for the complete and advanced management of stand alone or multiplexed refrigeration units MPXPRO includes a wide range of integrated microprocessor parametric controllers optional electronic boards terminals displays and accessories that ensure high flexibility and extended functions for the management of showcases or cold rooms MPXPRO can independently manage the control and operation of a refrigeration unit implement a vats series of functions and emergency procedures to avoid critical situations control stepper or PWM electronic expansion valves synchronise a master slave net
92. event defrosts on units exposed to the public during the shop opening hours and to be able to perform special hot gas defrosts e If the digital contact for the defrost call is connected in parallel to a series of MPXPRO controllers the defrosts on the various showcases can be staggered see advanced parameter d5 A4 A5 A10 A11 A12 4 Start defrost 7 _ no defrost call SF defrost call The closing of the digital contact starts the defrost if enabled If the controller is the master the defrost will be a network defrost while if it is a slave it will only be a local defrost Note e If the defrost is inhibited by another digital input configured as enable defrost the defrost calls are ignored e If the digital contact for the defrost call is connected in parallel to a series of MPXPRO controllers the defrosts on the various showcases can be staggered see advanced parameter d5 A4 A5 A10 A11 A12 5 Door switch This function is useful when MPXPRO is used to control check a cold room and specifically to manage the contact on the door Door open Stop control shutdown compressor solenoid and evaporator fans e Switch light on if configured see basic parameters H1 H5 H7 A flashing on the display e Disable temperature alarm Door closed e Restart control e Switch light off if configured see basic parameters H1 H5 H7 A stops flashing on the display e Enable temperature
93. figuration 0 9 2 H7_ Auxiliary output AUX 3 configuration 0 9 5 Tab 5 i Each auxiliary output can be configured to carry out the following functions H1 H5 H7 Function output 0 not configured 1 normally open alarm 2 normally closed alarm 3 auxiliary output 4 master remote auxiliary output 5 ight 6 master remote light 7 auxiliary evaporator defrost 8 an 9 anti sweat heaters Tab 5 j MPXPRO 030220186 rel 2 0 07 02 2008 NO alarm normally open H7 H5 H7 1 The digital output is normally open it is closed when an alarm is activated NC alarm normally closed H1 H5 H7 2 The digital output is normally closed it is opened when an alarm is activated This guarantees maximum safety as the alarm is also activated in the event of power failures or disconnection of the cables AUX auxiliary output H1 H5 H7 3 The auxiliary output is activated when the controller switches from night status to day status and is deactivated when switching back curtain switch or time bands It can be activated deactivated manually using the a button if basic parameter H9 1 or from the supervisor AUX master remote auxiliary output H1 H5 H7 4 This can only be configured on the slaves It allows the auxiliary output on a slave to repeat the same operation as the auxiliary output on the master With this configuration for example AUX3 on a slave can exactly replicate the behaviour of AUX3 on the master Light H1 H5 H7 5
94. for resetting the alarm is represented by this threshold plus the hysteresis P13 P12 EEV LSA Low suction temperature alarm delay Code UOM Min Max Def P12 5 0 999 600 This represents the alarm activation delay after exceeding the threshold P11 When the alarm is activated the following occur e The message LSA is shown on the display e The buzzer is activated The alarm features automatic reset for the first three activations over a two hour period P12 0 gt LSA alarm disabled P13 EEV LSA Low suction temperature alarm differential C Code UOM Min Max Def Pls C F 0 0 60 0 10 0 This represents the hysteresis used to reset the LSA alarm P13 0 gt always automatic reset e LOP Minimum evaporation pressure Function useful above all for stand alone refrigeration units used to prevent the evaporation pressure from remaining excessively low for too long When the evaporation pressure expressed in degrees saturated falls below the threshold the LOP protection is activated which adds an integration action to normal PID control specifically devised to be more reactive as regards the opening of the valve The PID control remains active as the superheat must continue to be monitored as to avoid flooding the compressors The LOP alarm is delayed from the activation of the protection function both are reset automatically when the pressure value in degrees saturated exceeds t
95. gue probe measurement stability ro Control offset in the event of probe error Special functions St2 Intake probe set point with double thermostat rd2 Control differential with double thermostat 4 ON time for duty setting operation Toff 15 min fixed cc Duration of continuous cycle operation c6 Low temperature alarm bypass time after continuous cycle 6 2 2 Settings This paragraph describes the advanced functions for configuring the set point and the temperature measurement functions on a refrigeration unit in particular relating to The range of the set point The frequency for refreshing the control probe reading Operation in the event of control probe breakage rl Minimum set point Code UOM Min Max Def rl C F 50 0 2 50 0 This is used to set the minimum temperature set point value that can be set by the user The set point cannot be set below this limit r2 Maximum set point Code UOM Min Max Def r2 C F rl 50 0 50 0 This is used to set the maximum temperature set point value that can be set by the user The set point cannot be set above this such limit 2 Analogue probe measurement stability Code UOM Min Max Def 2 1 5 4 This determines the refresh rate for the values read by the probes e Low values mean very frequent readings and consequently allow higher sensitivity of the control in re sponse to rapid variations in the values measured This may also mean gre
96. h double thermostat active the action of OSH will be determined by the thermostat with the lower difference between the set point and the actual temperature e In case of Double thermostat the action of OSH is relevant to the higher value between Tf st rd 2 and Tf2 St2 rd2 2 since there are 2 time bands MPXPRO 030220186 rel 2 0 0702 2008 Application example OSH too low A Controlled SONAR O rn i eae auleaistes Ton Cabinet differential C Tf Function intervention threshold We A Toff Cabinet set point C OSH too high A Controlled temperature FO n cineca Ton Cabinet differential C WLLL Tf Function intervention threshold Toff Cabinet set point C OSH ideal A Controlled Pe o o Ton Cabinet differential C Li Tf Function intervention threshold Toff Cabinet set point C gt Fig 6 h P15 EEV Main Support saturated temp in the event of pressure probe error Code UOM Min Max Def P15 C F 50 0 50 0 8 0 In the event of a pressure saturated evaporation temperature probe error this represents the constant value used by the device to simulate the probe reading In centralised systems the evaporation pressure is determined by the compressor rack set point Once this set point has been set for P15 control can continue even if not in perfect conditions in eme
97. hange in status only changes the working set point and the control probe where set as described previously 5 2 Control MPXPRO features different modes for controlling the temperature inside the cabinet or cold room This section describes the basic parameters to set a standard configuration of the controller in particular 5 2 2 Temperature set point 5 2 3 Night time set point management 5 2 1 List of parameters Code Parameter Set point St Unit set point rd Temperature set point differential 4 Virtual probe composition Sv Night time set point management r4 Automatic night time set point variation r6 Enable night time control on intake probe Sr Tab 5 n 5 2 2 Temperature set point To determine the control status MPXPRO compares the value read by the control probe Sreg against the set point and the differential rd see Fig 5 0 For advanced control applications see chapter 6 Advanced functions St Unit set point Code UOM Min Max Def St F rl 2 50 0 This establishes the value of the set point the desired temperature inside the cabinet cold room used for control in day mode rd Temperature set point differential Code UOM Min Max Def rd F 0 1 20 0 2 0 This determines the controller operating cycle It is summed to the value of St set as above to determine the control status If the temperature measured by the control probe excee
98. he normal display after a timeout of 1 min 3 3 3 Modifying the parameters 1 Access the desired configuration menu Type A parameters Type C parameters or Type F parameters see Table 3 b Functions and associated buttons 2 If using a user terminal connected directly to the master unit select the unit see par 3 3 1 Selecting the network unit 3 Press UP or DOWN until reaching the desired parameter the icon for the function will be displayed ogether with the parameter Alternatively Press PRG to display the menu of parameter categories Press UP or DOWN until reaching the desired category of parameters and press SET The list of parameters in the selected category is displayed then press UP or DOWN until reaching the desired parameter the display shows the icon that represents the category the parameter belongs to see Table 3 0 4 Once having reached the desired parameter press SET Increase or decrease the value of the parameter using UP or DOWN 6 Press SET to temporarily save the new value and return to the display of the list of parameters to modify other values 7 Ifthe parameter has sub parameters after having selected the parameter as in point 4 press SET again to enter the sub menu use the UP or DOWN button to scroll between the sub parameters which can be modified like a normal parameter Press SET again to temporarily save the values and return to the higher level menu 8 Once
99. he threshold PL1 EEV LOP LOP threshold saturated evaporation temperature Code UOM Min Max Def PLI C F 50 0 50 0 50 0 This represents the evaporation pressure expressed in degrees saturated below which the LOP protec tion is activated The protection is deactivated immediately when the pressure exceeds this threshold PL2 EEV LOP LOP integration time Code UOM Min Max Def PL2 S 0 240 0 S PEt Saturated 2 evaporation 53 temperature E Tsat LOP PL3 gt Correction of LOP TILOP LOP sul L lt _______ gt Timeout LOP Automatic reset Fig 6 j This represents the integration constant used during the activation of the LOP protection This integration time acts in parallel to normal PID control PL2 0 gt LOP protection and alarm disabled PL3 EEV LOP LOP alarm delay Code UOM Min Max Def PL3 S 0 240 0 This represents the alarm activation delay after exceeding the LOP threshold When the alarm is activated the following occur e The message LOP is shown on the display e The buzzer is activated The alarm features automatic reset when the evaporation pressure rises above the threshold PL1 PL3 0 gt LOP alarm disabled MPXPRO 030220186 rel 2 0 07 02 2008 6 3 6 Manual valve positioning from the supervisor PMP EEV ADV Enable manual positioning of the expansion valve Code UOM Min Max Def PMP E 0
100. he threshold d10 0 running time disabled d11 Defrost temperature threshold in Running time mode Code UOM Min Max Def dil C F 50 0 50 0 30 0 This indicates the evaporator temperature threshold below which the controller starts counting the time d10 for the automatic activation of a defrost Naturally the evaporator temperature defrost temperature is the value measured by the defrost probe Sd installed in contact with the evaporator and configured with parameter Fb e Sequential stops Sequential stop mode is especially useful for high normal temperature refrigeration units and is based on the intelligent stopping of control to allow the evaporator to defrost naturally by the flow of ambient air only without activating the defrost output and consequently the defrost heaters When control stops the operation of the fans depends on the setting of parameter F3 If the function is enabled parameter dS10 two counters are activated 1 dS1 for the stop control time on hold during operation 2 dS2 for the control operating time on hold during the periods when control is stopped The purpose of this new function is stop control and allow natural defrosts only when necessary The old procedure in fact which only counted the control operating time was in some cases inefficient due to brief periodical stops that reset the counter but did not ensure correct defrosting Elapsed dS2 Decreased dS2 MSA operati
101. he two is available the Duty Setting control starts With this function the controller is activated at regular intervals operating for a time equal to the value set for the duty setting parameter c4 and off for a fixed time of 15 minutes This mode manages to temporarily extend service times 42 MPXPRO 030220186 rel 2 0 07 02 2008 c4 ON time for duty setting operation tOFF 15 min fixed Code UOM Min Max Def c4 min 0 100 0 lIn the event of alarms on the components of the control probes c4 allows the controller to be operated awaiting the resolution of the fault As the controller cannot adapt operation based on the temperature inside the refrigeration unit it operates for a time equal to c4 ON time and stops for a fixed time of 15 min OFF time The ON time may last from 0 to 100 minutes 1 c4 0 control always on 2 c4 100 control always off With the duty setting active during the ON time the icon remains on while flashes during the off sta tus The table below describes the possible error situations on the components of the control probe in various types of systems with one or two probes Examples of systems Control probe fault Action of MPXPRO Parameter sm Sr System with just one r Duty setting c4 probe v Duty setting c4 System with two v Control with Sr ro probes v Control with Sm ro v v Duty setting c4 Tab 6 f in MPXPRO the changeover to the
102. he value of the virtual probe _ Sms 100 4 Sr 4 E 100 This fuction can be enabled only if Double thermostat is disabled rd2 0 5 2 3 Night time set point management MPXPRO can change the temperature set point at night useful for energy saving Night time operation can be activated by e curtain switch curtain down basic parameters A4 A5 A10 A11 A12 e night time bands parameters tS1 to tS8 tE1 to tE8 local or by Master Therefore based on the settings of parameters r4 and r6 relating to night time set point management control will be different during the day and at night according to the table below Variable Day mode Night mode r6 0 r6 1 Control probe Sreg Virtual probe Sv Virtual probe Sv Intake probe Sr set point set point St St r4 Tab 5 p r4 Automatic set point variation in night time operation Code UOM Min Max Def 14 C F 50 0 50 0 0 0 In night mode MPXPRO automatically increases the set point as determined by parameter St by the offset set for r4 The new reference night time set point Stn is therefore St St r4 If r4 is negative in night mode the control decreases the standard set point r4 0 default No variation in night mode r6 Enable night time control on intake probe Sr Code UOM Min Max Def r6 Flag 0 1 0 This is used to modify the configuration of the control probe Sreg during night mode r6 0 Control probe Sreg Virtual p
103. ht time bands p 26 Example of automatic set point variation in night time operation St 20 C r4 5 C Stn St r4 20 5 15 C 28 4 Virtual probe composition Sv UOM Code j4 Min 0 Max 100 Def 0 The virtual probe is the control probe used by MPXPRO during standard operation For the alternative functions see basic parameter r6 or in paragraph 6 2 Control p 41 Parameter 4 is used to assign the virtual probe Sv to the value read by the outlet probe Sm the intake probe Sr or a weighted average of the two values Depending on the value set for 4 1 to 99 the reading of Sv may be closer to Sm or to Sr 4 Virtual probe composition Sv 0 Sv Sm virtual probe Sv Outlet probe Sm 1 49 Sv Sm gt Sr __ virtual probe Sv Outlet probe Sm gt Intake probe 50 Sv Sm Sr _ virtual probe Sv Outlet probe Sm Intake probe 51 99 Sv Sm lt Sr __ virtual probe Sv Outlet probe Sm lt Intake probe 100 Sv Sr virtual probe Sv Intake probe Sr Tab 5 0 The control probe in the most common applications coincides with the virtual probe Sv set using pa rameter 4 It may be different in the event of night time set point management or the double thermostat function With control ON the compressor solenoid output and the management of the electronic valve where featured are activated Note The following formula is used to calculate t
104. igital input that determines the changeover can be connected to the master setting the following parameters Unit Parameter Action master A9 1 Enable propagation of DI master A4 7 DI master curtain switch slave A8 7 On the Slaves virtual digital input curtain switch In this way each slave changes from day status to night status or vice versa whenever the status of digital input DI1 on the master changes To see the effect of this function refer to the description of the function of the digital inputs basic parameters A4 to A12 DI1 has been selected to be propagated as a digital input its function is still configured by parameter A4 A8 Configure function of virtual digital input Parameters modified from version 2 0 Code UOM Min Max Def A8 0 7 0 This determines the function associated with the virtual digital input the functions that can be associated are exactly the same as for a normal digital input physically connected to the unit On the master configu red to propagate the status of a physical digital input A9 0 as the virtual digital input the setting of A8 has priority over any configuration set for parameters A4 to A12 A8 Function e NY 0 default _ Input not used 1 Immediate external alarm Active Inactive 2 Delayed external alarm display only Active Inactive 3 Enable defrost Not enabled Enabled 4 Defrost call Not active Active 5 Doo
105. ion to 6 sets of parameters Management of 5 slaves 8 1 Compatibility with previous versions 1 Firmware MPXPRO 2 0 and higher is compatible with the previous versions in terms of functions that is mixed master slave networks can be created with the various versions the basic functions of versions 1 are always guaranteed 2 Programming key MPXPRO 2 is only compatible with MXOPZKEYAO and not with IROPZKEYAO which is only compatible with the previous versions 3 In version 2 0 some parameters have been extended or the code changed to make them easier to identify see the summary below In the body of the manual each parameter that is different from the previous versions is marked as modified from version x x Parameter in version 1 Modification in version 2 0 Description on page d l New code Sd1 30 d 2 New code Sd2 54 dio Maximum value 240 55 A4 A5 A10 All A12 Added option A4 8 Continuous cycle from version 1 2_ 22 F6 Minimum value modified from 10 to 0 57 F7 Maximum value modified from 80 to 100 57 H1 H5 H7 Added option H1 9 anti sweat heaters 24 Hdn New maximum value 6 P10 Default 0 49 Pol New code Sh 51 Po2 New code PPu 51 Poz New code tGS 51 Po New code TEu 51 Po5 New code cE 51 Tab 8 1 8 2 Description of the new functions Below is a description of all the new functions including the description of the corresponding parameters 8 2 1 Di
106. ive defrosts p 29 A dP2 Maximum defrost duration on second evaporator p 54 A ddP Additional maximum defrost time delta in Power defrost mode p 56 C amp dt1 End defrost temperature p 29 C amp dP1 Maximum defrost duration p 30 de effective defrost duration 54 dd Dripping time after defrosting fans off Code UOM Min Max Def dd min 0 15 2 This defines the interval in minutes during which the compressor and the evaporator fans are forced off after defrosting so as to allow the evaporator to drip If dd 0 no dripping time is enabled and at the end of the defrost control resumes immediately 6 5 3 Second evaporator MPXPRO is used to manage separate defrosts on two evaporators in parallel This specific configuration is only allowed if an electronic expansion valve is not used and therefore control is performed on the two thermostatic valves or directly on the solenoid valve With this function enabled the defrosts on the two evaporators can be performed independently with different end defrost thresholds and maximum durations Naturally two separate auxiliary outputs must be used see basic parameters H1 H5 H7 and a temperature probe must be installed on the second evaporator see advanced parameter FF Sd2 Second evaporator defrost probe Parameters modified from version 2 0 Code UOM Min Max Def Sd2 C F This is used to display the temperature measured by the
107. l and display connected 1 User term connected and display optional 66 A 3 0 3 2 User term optional and display connected _ 3 User terminal and display optional Select type of probe Group 1 S1 S2 53 0 Standard NTC with Range 50T90 C P1 1 Standard PTC Range 50T150 C 35 z 8 0 0 5 2 Standard PT1000 Range 50T150 C 3 NTC K243 Standard Range 50T90 C P2 Select type of probe Group 2 SA S5 See P1 35 C 0 3 P3 Select type of probe Group 3 S6 35 _ c 0 0 4 Pro 0 to 3 See P1 4 0 to 5 V ratiometric probe p4 Select type of probe Group 4 S7 35 g c 0 0 6 A A 0 to 3 See P1 4 0 to 5 V ratiometric probe 5 0 to 10 V input 6 4 to 20 mA input Select type of probe Group 5 serial probes S8 to S11 P5 35 C 0 0 15 0 temperature probes FA Assign outlet temperature probe Sm 2 I c 1 0 1 0 Function disabled 1 to 11 S1 to S11 Fb Assign defrost temperature probe Sd See Fa 21 C 2 0 1 Fc Assign intake temperature probe Sr Gee Fa 21 C 3 0 1 Fd__ Assign evaporator outlet temp probe Tsuct EEV See Fa 37 C 0 0 1 Fe Assign saturated evaporation temp probe T Psat EEV See Fa 37 C 0 0 1 JEF Assign defrost temperature probe 2 Sd2 See Fa 37 C 0 0 1 FG__ Assign auxiliary temperature probe 1 Saux See Fa 37 C 0 0 1 FH Assign auxiliary temperature probe 2 Saux2 See Fa 37 0 0 1 FI Assign room temperature sensor SA 37 A 0 0 1 JEL_ Assign room humidity sensor SU 37
108. larm HA to HA2 Day 59 Days z 1 31 h HACCP alarm HA to HA2 Hour 59 Hours hi 0 23 n HACCP alarm HA to HA2 Minute 59 Min 0 59 Hop HACCP alarm HA to HA2 Duration 59 Min 0 240 HEn Number of HF alarms 60 C 0 0 15 HF1 3 Number of type HF1 to 3 HACCP events activated 60 C HACCP HF Details of HACCP alarm HF 1 60 C 2 ly HACCP alarm HF to HF2 Year 60 Years 0 99 M HACCP alarm HF to HF2 Month 60 Months 1 12 d HACCP alarm HF to HF2 Day 60 Days 1 31 h HACCP alarm HF to HF2 Hour 60 Hours 0 23 n HACCP alarm HF to HF2 Minute 60 Min hi 0 59 HACCP alarm HF to HF2 Duration 60 Min Li 0 240 Htd HACCP alarm delay 59 Min C 0 o 240 0 monitoring disabled RTC management Real Time Clock and timed defrost rtc parameters td1 8_ Details of defrost event 1 to 8 30 C Defrost 1 to 8 Day 0 event disabled 9 Monday to Saturday 7 d 1 to 7 Monday to Sunday 10 Saturday amp Sunday s Days v a 1 8 Monday to Friday 11 every day h Defrost 1 to 8 Hour 30 Hours di 0 0 23 n Defrost 1 to 8 Minute 30 Min hi 0 0 59 pO Defrost 1 Enable Power defrost type of defrost 30 flag P 0 I 0 normal 1 power defrost tS1 8 Start day details time band 1 to 8 26 C tc id Start day details time band 1 to 8 Day 26 Days 0 0 1 h Start day details time band 1 to 8 Hour 26 Hours 0 0 23 O n Start day details time band 1 to 8 Minute 26 Min ji 0 0 59 tE1 8 End day details time band 1 to 8 26 C d E
109. larm disabled _ PI3 a LSA Low suction temperature alarm differential C 50 F c 10 0 00 600 0 always automatic reset P15 EEV Main Support saturated temp in the event of pressure probe error 47 SCE OC 8 0 50 0 50 0 EEV Main Type of refrigerant EVd IPH 1 R22 3 R404a 5 R410a 7 R290 9 R600a 11 R744 13 R1270 45 5 1 14 A 2 R134a 4 R407c__6 R507a__8 R600 10 R717 12 R508a__14 R417a OSH EEV ADV Superheat offset for modulating thermostat 46 K c o0 o0 600 0 0 function disabled i Phr EEV ADV Enable fast update of the valve parameters to supervisor 46 flag c 0 0 0 fast update disabled PMI EEV MOP MOP threshold saturated evaporation temperature 49 C F C 50 0 50 0 50 0 PM2 Ly E o wul integration time 49 S C 10 0 240 EV alarm delay iii 0 function disabled c 0 0 gt PM4 EEV MOP MOP function delay when starting control 49 S C 2 0 240 PM5 EEV MOP Enable close local solenoid valve for MOP alarm 49 flag 0 0 PLI EEV LOP LOP threshold saturated evaporation temperature 50 C F _C_ 50 0 50 0 50 0 PL2 EEV LOP LOP integration time 50 S C 0 0 240 PL3 EEV LOP LOP alarm delay 50 c 0 0 240 0 alarm disabled Pol Superheat 51 K F Po2 Valve opening percentage 51 F Po3 Superheated gas temperature 51 CSF OF Po4 Saturated evaporation temperature 51 YEI F Po5 Saturated evaporation temperature calibration 38 YEI C 0 0 20 0 20 0 Po6 EEV ADV PWM expansion valve Ton T
110. lary compressors c3 Minimum on time Code UOM Min Max 3 min 0 15 Def 0 This represents the minimum compressor running time No compressor stop calls will be accepted until the set time has elapsed see Fig 6 n d9 Disable defrost priority over solenoid times Code UOM Min Max Def d9 fla 0 1 1 Disables the compressor protection times when the defrost is called This is useful for hot gas defrosts 1 d9 0 the protection times are observed 2 d9 1 the protection times are not observed the defrost has higher priority A6 Configure solenoid control during external alarm immediate or delayed Code UOM Min Max Def A6 min 0 100 0 If an external alarm is activated both immediate and delayed control is normally stopped for the duration of the alarm Parameter A6 can be used to activate control for a time equal to the value of A6 ON time followed by a fixed pause of 15 min OFF time This is similar to the duty setting function advanced parameter c4 e A6 0 in the event of external alarms the compressor is always off e A6 100 in the event of external alarms the compressor is always on the 15 min off time is skipped Note e During operation in A6 the fans continue to operate according to the set configuration e A6 has priority over c4 duty setting in the event of simultaneous external alarms and breakage of the control probes the action of parameter A6 is implemente
111. lass temperature is performed internally based on room temperature SA outlet temperature Sm and intake temperature Sr This formula has 2 hidden coefficients rHA and rHb to adapt to even the most critical situations Outputs The output used by default is the PWM1 output 17 19 however VPM can be used to change this to other analogue outputs The maximum activation period can be set using parameter rHt rHt has no effect on 0 to 10 Vdc and digital outputs The auxiliary digital outputs configured as anti sweat heaters using parameters H1 H5 H7 ces only operate manually based on parameters rHt and rHu MPXPRO 030220186 rel 2 0 07 02 2008 unn referen Algorithm The percentage of activation Hh of the heater outputs depends proportionally on the difference betwe en dewpoint calculated the value of parameter rHo offset and the value of parameter rHd differential as shown in the following graph Hh A rHo rHd i CUTOFF gt lt gt Max Min 0 l i Svt Sdp rHo rHd CUTOFF Fig 8 a Where MIN minimum output fixed at 10 MAX maximum output fixed at 100 CUT OFF cut off temperature fixed at 5 C above the differential The action is proportional only when the estimate of the glass temperature sensor reading is used and proportional plus integral Tint 240s constant if the physical glass temperature sensor is used The integral action has the purpose of bringing the
112. lves alternatively POWER SUPPLY N oe ea ee NL 115 230 Vac L 25 W max TooToo Tos oa os GND _ reinforced insulation with reference Mei ete i __ to its internal power supply i i 40 10 Vdc The input 0 to 10 Vdc must feature 14 MPXPRO 030220186 rel 2 0 0702 2008 MX2PPWM board connections Terminal _ Connection Function 68 GND 0 to 10 Vdc output 67 0 to 10 Vdc 66 Not used 65 DC PWM valve 64 63 L AC PWM valve 62 N 61 N Power supply 60 L Tab 2 f 2 5 0 to 10 Vdc expansion board wiring diagram MX20PA100 Fig 2 f MX20PA100 O A i Analogic output 1 0 10 Vdc ic The input 0 to 10 Vdc must feature 1 N i 3 1 i reinforced insulation with reference 1 __I to its internal power supply i MX20PA100 board connections Terminal _ Connection Function 42 GND 0 to 10 Vdc output 41 0 to 10 Vdc 40 Not used Tab 2 g MPXPRO 030220186 rel 2 0 07 02 2008 A Important before installing the expansion board disconnect the power supply and remove the plastic cover 3 USER INTERFACE IR U Function This chapter describes the features and the functions available to display the status and set the parame ters of the MPXPRO series controllers The basic MPXPRO series interfaces are e IR U display with three digits and function icons e R X user terminal
113. maximum inputs and outputs To check which inputs and outputs are effectively present on the model in question see par 1 4 Models A Important The connections must be performed with the board disconnected from the power supply N glo lg L 6 A Default 8 9 10911 12 13 114 15 16 Ana JOMA Ma drof c 12 Vdc 7 7 GK PWM modulating fans Req additional R4 R5 module as MCHRTF MX20 E Expansion board 230 V 50 mA max E V driver MX2OPSTP BE ni PWM driver MX20PPWM Be E HE ga Power Supply 230 V 50 mA max 0 10 Vdc Analog output MX20PA10 Mounted on E p VSS p VS py E py D DN MX20S MX20P48500 EN60730 1 MANO 8 10 AN O 8 2 AN O 6 4 AN O 6 4 A N O only for MX20S 301 4 A N C 8 2 AN C 6 4 A N C GLOCK UL 873 6A2FLA 8A8FLA 8A5FLA 6A2FLA 6A2FLA and 12 LRA 72 LRA 30 LRA 12 LRA 12 LRA SERIAL INT Maximum currents with removable vertical connectors cod MX20 C I 0 laximum currents with removable vertical connectors cod MX20 C I 0 MX20P485 For more details please refer to the technical leaflets MXOPZKEYAO 10T50 00600 proc key E ns QI To be used only with S4 S5 S6 S7 T U I M 5 N control switch off no Power Supply 37 36 35 34 331 32 31 30 29 28 27 26 25 24 23 22 21 20 Default connection Supervisor Only Master units to
114. me of the Real Time Clock RTC Selecting the parameter with the button shows the various sub parameters is sequence To set date time RTC Description Sub parameter UOM Min Max Def tc id y Year 00 99 00 M Month 1 12 l 6 0 0 0 0 indicates the day of the week 1 Monday 2 Tuesday 7 Sunday Note The changes to these parameters have effect immediately that is they are saved directly when exiting the parameter by pressing the SET button tS1 to tS8 tE1 to tE8 Day and night status time bands Code Description Sub parameter__ UOM Min Max Def tS1 t88__ Start time band days h hour 0 23 0 m min 0 59 0 tE1 tE8 _ End time band d days 0 1l 0 h hour 0 23 0 m min 0 59 0 Tab 5 1 The days d in the bands correspond to d days 0 no days 1 7 Monday to Sunday 8 Monday to Friday 9 Monday to Saturday 10 Saturday amp Sunday Il Every day Tab 5 m MPXPRO 030220186 rel 2 0 0702 2008 MPXPRO manages a maximum of 8 time bands These can be useful to simultaneously manage daily closing times weekly closing times weekends etc In particular when switching from Day status to Night status the following actions are possible e disattivare l uscita LUCE o AUX secondo quanto impostato dal parametro base H8 e icontrol with night time set point Stn St r4 equal
115. n Number of sets of parameters 40 NV 0 0 6 MPXPRO 030220186 rel 2 0 07 02 2008 71 Code Parameter Page UOM Type Def Min Max Note Htc Clock option 26 c 0 0 1 0 clock absente ae i Hu Hot wire PWM 1 and 2 activation time on period of 240 seconds 26 c 70 0 100 CNF 0 hot wire function disabled i rHt Anti sweat activation period 67 Min A 5 0 180 AUX Ho Anti sweat heater modulation offset __ 67 C F A 2 20 20 rHd Anti sweat heater modulation differential 67 C F A 0 20 20 rHL Type of load for PWM outputs 67 A 0 0 1 rHA Coefficient A for glass temp sensor estim 67 C NV 2 20 20 rHb Coefficient B for glass temp sensor estimate 67 NV 22 0 100 Alarm log parameters HSt HS0 9 Alarm event 0 to 9 58 C HSt Alarm event 0 to 9 Code 58 h Alarm event 0 to 9 Hour 58 Hours 0 23 AUX In Alarm event 0 to 9 Minute 58 Min 0 59 Alarm event 0 to 9 Duration 58 Min 0 999 HACCP alarm management parameters HcP HAn Number of HA alarms 60 E 0 0 15 HA HA2 Number of type HA to HA2 HACCP events activated 59 C HA Details of HACCP alarm HA1 to 3 59 C ly HACCP alarm HA to HA2 Year 59 Years 0 99 M HACCP alarm HA to HA2 Month 59 Months 1 12 d HACCP a
116. nctional groups based on their specific purpose To simplify understanding the basic and advanced parame The advanced functions are ters are highlighted by references shown on the side of the 6 1 General configuration page For example if the text refers to parameter A6 the 6 2 Control following reference will be shown on the side of the page 6 3 Electronic expansion valve di i 6 4 Compressor a 6 5 Defrost 6 6 Fan speed modulation 6 7 Alarms 6 8 HACCP alarms This chapter shows all the parameters corresponding to the advanced functions featured in the MPXPRO firmware Based on the default configuration the set of parameters used or the special settings entered by the user these can be totally or partly masked and therefore not accessible to the final user 6 1 General configuration This section describes the advanced settings relating to 6 1 2 Password 6 1 3 Analogue inputs 6 1 4 Probe functions 6 1 5 Network pressure saturated temperature probe 6 1 6 Probe and saturated evaporation temperature calibration 6 1 7 LAN and HW 6 1 8 Virtual digital input 6 1 1 List of parameters Code Parameter Password PSA Password to display advanced parameters PSS Password for entering the alarm log PSU Password for entering the parameters uploading Analogue inputs PI Select type of probe Group 1 S1
117. nd day details time band 1 to 8 Day 26 Days x 0 0 Il h End day details time band 1 to 8 Hour 26 Hours 0 0 23 n End day details time band 1 to 8 Minute 26 Min 0 0 59 c RTC date time setting 26 C y Year 26 Years 0 00 00 99 M Month 26 Months di 1 1 12 d Day of the month 26 Days di 1 1 31 u Day of the week 26 Days 6 1 7 h Hour 26 Hours 0 0 23 n Minute 26 Min 0 0 59 Supervisor system parameters _ PF EEV ADV Valve opening steps l 51 0 480 PMP EEV ADV Enable manual positioning of expansion valve i Sena 51 0 1 0 manual positioning disabled PMu EEV ADV Manual valve position 51 0 600 Parameters from programming key and or commissioning tool Hdn Number of sets of default parameters available 40 0 0 2 PS Password to display configuration parameters 35 22 0 200 PSS Password to enter alarm log 35 PS 22 PSU Password to enter parameter upload 35 PS 44 Tab 10 a 72 MPXPRO 030220186 rel 2 0 0702 2008 11 TECHNICAL SPECIFICATIONS Model Voltage Power Power supply MXXxxxxEXX 230 V 50 60 Hz 11 5 VA 50 mA max MXxxxxxAXx 115 V 50 60 Hz 11 5 VA 100 mA max reinforced insulation from very low voltage parts 6mm in air 8mm on surface Insulation guaranteed by the supply MXx
118. nomically convenient requires careful installation and in any case does not offer the same precision as a ratiometric probe CAREL recommends the use of ratiometric probes for reading the evaporation pressure which is automatically converted to the saturated temperature using the specific tables for the type of refrigerant used Description of operation The values read by the probes described above are called tGS evaporator outlet temperature e tEU saturated evaporation temperature converted from pressure These values are used to calculate the superheat SH tGS tEu MPXPRO manages the proportional opening of the electronic expansion valve adjusting the flow of refri gerant in the evaporator so as to maintain the superheat around the value set for advanced parameter P3 superheat set point The opening of the valve is controlled simultaneously yet independently from normal temperature control When there is a refrigeration call the compressor solenoid valve relay is activated control of the electronic valve is also activated and then managed independently If the superheat value read by the probes is greater than the set point the valve is opened proportionally to the difference between the values see the figure on the side The speed of variation and the percentage of opening depend on the set parameters MPXPRO 030220186 rel 2 0 0702 2008 The opening is continuously modulated based on the superheat value with PID c
119. nstrument but rather the first start up in safe conditions so as to avoid critical situations and be able to set all the remaining parameters at a later stage on the user terminal or via the supervisor During this procedure the device remains in standby and all the functions are deactivated the controller consequently does not implement any control functions or communicate with the supervisor These restrictions end only after having set all the required parameters 4 3 Device start up parameters When first starting the controller the user terminal does not display the traditional menu but rather automatically enters a temporary configuration menu that only displays the parameters defined as critical for the initial operation of the installation By default the following parameters are displayed Code Application Description P2 Electronic expansion valve Select type of probe Group 2 S4 S5 DI1 DI2 P3 Select type of probe Group 3 S6 DI3 Fd Assign evaporator outlet temp probe FE Assign saturated evaporation temp probe U6 Max value of sensor S6 L6 Min value of sensor S6 PI Type of valve PH Type of refrigerant HO Supervisor and LAN Serial LAN address In Unit configuration Master or Slave sn Number of slaves connected to the Master Tab 4 a 4 4 Navigation This menu can be navigated in the traditional manner through the sub sets of parameters To exit the menu press an
120. ntake probe Sr only for control If there is an error with this probe and the outlet probe is fitted the unit responds as if 4 100 MPXPRO 030220186 rel 2 0 07 02 2008 Measurement update sequence C Lower sensitivity low reading frequency High reading frequency Higher sensitivity lt _t Fig 6 c C 4 Virtual probe composition Sv p 28 A c4 ON time in duty setting operation p 43 4 Examples of using parameter ro Examples of using ro in the New Control probe Set point ro Sr Sm New set point event of a probe fault robe E g 1 Sm fault in daytime Sr Sv St 2 5 2 3 St ro 100 4 100 operation 4 0 2 5 100 0 100 100 Sm 3 E g 2 Sr fault in daytime Sm Sv St 1 5 2 3 St ro 100 4 100 operation 4 75 1 5 100 75 100 75 Sm 2 25 Tab 6 d 6 2 3 Special functions This paragraph describes the following advanced control functions on MPXPRO 6 2 3 1 Double Thermostat 6 2 3 2 Duty Setting 6 2 3 3 Continuous cycle 6 2 3 1 Double Thermostat Double Thermostat is a special function on MPXPRO that is used to control the temperature inside a refrigeration unit using two separate thermostats one associated with the outlet probe and the other with the intake probe This control technique is used to appropriately manage the day night changeover and in particular the closing of the curtain at night without requiring
121. nvaried unvaried unvaried unvaried DI Etc Real time clock fault unvaried unvaried unvaried unvaried V LSH Low superheat alarm Off unvaried unvaried unvaried y DI LSK Low suction temperature alarm Off unvaried unvaried unvaried V V mOP Maximum operating pressure alarm Off unvaried unvaried unvaried Ri V LOP Low suction temperature alarm unvaried unvaried unvaried unvaried V V bLo Blocked valve alarm unvaried unvaried unvaried unvaried DI Edc Communication error with stepper driver unvaried unvaried unvaried unvaried DI EFS Motor controlled by the stepper driver broken unvaried unvaried unvaried unvaried EE Unit parameter flash error off not perf off not perf V EF Operating parameter EEPROM error off not perf off not perf V HA HACCP alarm type HA unvaried unvaried unvaried unvaried DI HF HACCP alarm type HF unvaried unvaried unvaried unvaried DI MA Communication error with the Master only on Slave unvaried unvaried unvaried unvaried ul u5 Communication error with Slave 1 5 unvaried unvaried unvaried unvaried n1 n5 __ Indicates alarm on unit 1 5 in the network unvaried unvaried unvaried unvaried upl Signals upload procedure in progress unvaried unvaried unvaried unvaried upl up5 Signals upload procedure with errors on unit 1 5 unvaried unvaried unvaried unvaried Tab 9 b 68 MPXPRO 030220186 rel 2 0 0702 2008
122. o 0 C 5 C in the range Probe type measurement error from 0 C to 90 C 2000 at 0 C range from 50 C to 90 C NERS enor 2 C in the range from 50 C to 25 C resolution 0 1 fs SA AZIO ARS measurement error 2 fs maximum 1 typical 420 mA resolution 0 5 fs J J 7 measurement error 8 fs maximum 7 typical 0 10V resolution 0 1 fs _ f measurement error 9 fs maximum 8 typical depending on the model EN60730 1 UL 873 model relay 250V operating cycles 250V operating cycles Bui 8 4 Aon NO MXxxxxxx A G M x R 4 6 4 A on N C 100000 8A res 2FLA 12LRA C300 30000 2 2 A on N O amp N C R2 R3 12 2 A on N O amp N C 100000 12A res 5FLA 30LRA C300 30000 R2 10 10 A 100000 12A res 12FLA 72LRA 30000 EN60730 1 UL 873 model relay 250V operating cycles 250V operating cycles by es 8 4 AonNO RA 6 4 Aon N C 100000 8A res 2FLA 12LRA C300 30000 MXxxxxxx B N x 2 2 A on N O amp N C Relay outputs R2 R3 10 2 Aon N O amp N C 100000 10A res 5FLA 30LRA C300 30000 R2 10 10 A 100000 10A res 10FLA 72LRA 30000 EN60730 1 UL 873 model relay 250V operating cycles 250V operating cycles are 6 4 Aon N O RA 6 4 A on N C 100000 6 Ares 2 FLA 12 LRA C300 30000 MXxxxxxx C O x 2 2 A on NO amp N C R2 R3 8 2 A on NO amp N C 100000 8 A res 5 FLA 30 LRA C 300 _ 30000 R2 8 10 A 100000 8 A res 8 FLA 72 LRA 30000 reinforced insulation from very low voltage parts 6mm in air 8mm on s
123. o its advanced level of technology requires setup configuration pro gramming commissioning to be able to operate in the best possible way for the specific application The failure to complete such operations which are required indicated in the user manual may cause the final product to malfunction CAREL accepts no liability in such cases Only qualified personnel may install or carry out technical service on the product The customer must only use the product in the manner described in the documentation relating to the product In addition to observing any further warnings described in this manual the following warnings must be heeded for all CAREL products e Prevent the electronic circuits from getting wet Rain humidity and all types of liquids or condensate contain corrosive minerals that may damage the electronic circuits In any case the product should be used or stored in environments that comply with the temperature and humidity limits specified in the manual e Do not install the device in particularly hot environments Too high temperatures may reduce the life of electronic devices damage them and deform or melt the plastic parts In any case the product should be used or stored in environments that comply with the temperature and humidity limits specified in the manual Do not attempt to open the device in any way other than described in the manual Do not drop hit or shake the device as the internal circuits and mechani
124. off 51 S C 6 1 20 cP1 EEV ADV Initial valve position at start control 46 C 30 0 100 Pdd EEV ADV Initial valve position maintenance time after defrost 46 min E 10 0 30 Psb EEV ADV Valve standby position 46 steps E 7 0 400 General configuration parameters CnF Select type of unit MASTER or SLAVE In 25 1 0 1 1 Master Sn Number of slaves in the local network 25 C 0 0 4 HO Serial address 25 C 199 0 199 Configure function of AUX1 output 0 No function ass with the output 5 Light output H1 1 Alarm output de energised 6 Light slaved to MAST on Slaves 24 c 3 0 8 2 Alarm output normally energised 7 Auxiliary evaporator def output 3 Auxiliary output 8 Evap fan output 4 Auxiliary ou pui salved to MASTER on slaves H2 Disable keypad and remote control functions 39 c 1 0 5 CNF 1 keypad and remote control enabled H4 Remote control enabling code 39 fla c 0 0 1 AUX 00 programming from the remote control without code 8 HS Disable terminal buzzer if present 24 c 2 0 3 0 buzzer enabled H6 Configure function of AUX2 output see H1 39 E 0 0 15 H7 Configure terminal keypad lock 24 E 5 0 8 Select output switched with time bands Light and Aux H8 0 NIGHT DAY time band linked to 27 flag 0 0 1 1 NIGHT DAY time band linked to AUX Select function associated with terminal AUX button Light or AUX H9 0 AUX button associated with light output function 25 C 0 0 1 1 AUX button associated with AUX auxiliary output function Hd
125. on the evaporator temperature and Sd Sv lt F1 Frd Fans on virtual probe Sd Sv gt FI Fans off 2 Fans controlled based on evaporator temperature only Sd lt Fl Frd Fans on Sd gt F1 Fans off Tab 5 u Where e FI basic parameter Fan start temperature e F2 basic parameter Stop fans with compressor off e Frd basic parameter Fan differential e Sd temperature measured by the defrost probe basic parameter Fb e Sv temperature measured by the virtual probe basic parameter 4 If FO 0 the fans are not controlled based on the temperature If FO 1 the fans are controlled based on the virtual probe and the evaporator temperature according to the graph on the side This status refers to the normal operation of the device that is when MPXPRO is not in specific modes such as defrost dripping post dripping In fact e the status of the fans can be forced during defrost see basic parameter F3 e during the dripping and post dripping phase see advanced parameters dd and Fd the fans are always off Note with FO 1 in normal control mode the fan temperature control uses the virtual probe Sv even control is performed on Sr in night time operation F1 Fan control temperature threshold only if FO 1 or 2 Code UOM Min Max Def FI F 50 0 50 0 5 0 This represents the temperature threshold used to determine the activation of the fans in reference to the evaporator temperature and or the
126. on time Regulation Re initialized dS1 e dS2 Compressor status Decreased dS1 compressor stop time Regulation Elapsed dS1 Fig 6 q The purpose of this new function is stop control and allow natural defrosts only when necessary The old procedure in fact which only counted the control operating time was in some cases inefficient due to brief periodical stops that reset the counter but did not ensure correct defrosting MPXPRO sequential stops function and in fact with control active for an extended period the effect of this function is exactly the same as before If two evaporators are managed in parallel two independent counters are activated on the evaporators and the behaviour is identical for both MPXPRO 030220186 rel 2 0 07 02 2008 55 C dP1 Maximum defrost duration p 30 A dP2 Maximum defrost duration on second evaporator p 54 Evaporator temperature l dti Fig 6 p paragraph 5 3 Defrost p 28 C Fb Assign defrost temperature probe sd p 37 dS1 Compressor off time in Sequential stop defrost mode Code UOM Min Max Def dS1 min 0 45 0 This represents the initial counter starting time in relation to the control stop time and the effective stop time when reaching the maximum time dS2 for the activation of control dS1 0 Sequential stops disabledi dS2 Compressor operating time in Sequential stop defrost mode Code UOM Min Max D
127. ontrol Note All the references relating to control of the electronic valve are based on the use of a CAREL E2V electronic expansion valve The descriptions are then made considering the steps of the stepper motor used for this type of valve for example the maximum number of opening steps is 480 All the functions are also then described for PWM valves In particular instead of the maximum opening expressed as the number of steps the maximum ON OFF time of the PWM valve is considered default 6 seconds The absolute openings expressed as steps must then be suitably converted by the user and referred to the maximum fixed period expressed in seconds 6 3 2 List of parameters Code Parameter Generic functions PH EEV Main Type of refrigerant PI EEV Main Select model of electronic valve P3 EEV PID superheat set point cP1 EEV ADV Initial valve position when control starts Pdd EEV ADV Initial valve position maintenance time after defrost PSb EEV ADV Valve standby position Phr EEV ADV Enable fast update of the valve parameters to supervisor OSH EEV ADV Superheat Offset for modulating thermostat P15 EEV Main Support saturated temp in the event of pressure probe error PID control P4 EEV PID Proportional gain P5 EEV PID Integration time P6 EEV PID Derivative time Safety functions and alarms LSH Low superheat P7 EEV
128. ontrol probe 2 Activation of the AUX or LIGHT output based on setting of parameter H8 A4 A5 A10 A11 A12 8 Continuous cycle o n When the contact closes the continuous cycle is activated parameters cc and c6 When the contact opens again the continuous cycle ends Continuous cycle inactive Continuous cycle active A7 Delay time for delayed external alarm Code UOM Min Max Def AT min 0 240 0 Sets the delay for the activation of the external alarm from digital input A4 to A12 2 5 1 4 Auxiliary outputs MPXPRO features a maximum of 5 digital outputs Two of these in particular relay 1 R1 and relay 3 R3 are related respectively to the management of the compressor solenoid valve and the defrost e R1 Compressor Solenoid R3 Defrost Their configuration cannot be modified on the keypad or via the supervisor To change this setting use the programming key or the commissioning tool see Chap 7 Programming key and Commissioning tool p 61 The other three auxiliary outputs in their default configuration have the following functions Output Relay Parameters Default functions AUX 1 4 HI A AUX 2 5 H5 A AUX3 2 H7 pol Tab 5 h H1 H5 H7 Configure AUX output functions Parameters modified from version 2 0 Name UOM _ Min Max Def H1_ Auxiliary output AUX 1 configuration 0 9 8 H5_ Auxiliary output AUX 2 con
129. operations and no unit of measure is defined Default The default settings define all the serial probes as temperature probes The system interprets the value of the serial probes based on the bitwise configuration of parameter P5 MPXPRO 030220186 rel 2 0 07 02 2008 35 For further information see chap 7 Programming key and Commissioning tool p 61 For further information on the types of probes and the connections e diagrams and electrical connections p 12 e Temperature probe configuration p 21 C Fd Post dripping time after defrost p 37 C A4 A5 A10 A11 A12 Digital input configuration p 22 A 5 Select C or F p 38 Specifically considering the binary representation of the value of the parameter the four bits on the right represent the configuration of the four probes according to the following diagram bit number 3_ 12 1_ 10 decimal value FF 18 44 h2 I serial probe 1 S1 Slo S9 S8 The type of probe can be configured based on the value of the individual bits e Example 1 S8 temperature probe gt bit0 0 S9 generic probe gt bit1 1 S10 generic probe gt bt2 1 S11 temperature probe gt bit3 0 bit 3 2 0 Bit value 0 1 1 0 Corresponding decimal value 8 4 2 1 Partial value 0 4 2 0 P5 6 Note The other bits 4 to 8 are ignored and considered null
130. ot gas using another support solenoid valve The two actions are not separated time wise By end mode By temperature the defrosts end when the defrost probe reading exceeds the threshold set using basic parameter dt1 If the evaporator does not reach the set threshold within the maximum period set for basic parameter dP1 the defrost is terminated due to the maximum time being reached Note the display of error message Ed1 for end defrost by maximum time depends on advanced parameter r3 Ed2 if two evaporators are managed see Advanced parameters Defrost Second evaporator e By time when there is no defrost probe the defrosts can end after a maximum time dP1 No end defrost error messages due to maximum time are signalled e Heater by time with temperature control see Fig 5 d heater defrost end by time the defrost output is only activated when the temperature measured by the defrost probe is less than the end defrost tempera ture threshold basic parameter dt1 This function is useful for energy savings dl Maximum interval between consecutive defrosts Code UOM Min Max Def dl ore 0 240 8 Safety parameter used to perform cyclical defrosts every dl hours even without the Real Time Clock RTC The effect of dl is always active It is also useful if the LAN or RS485 serial network is disconnected At the end of each defrost irrespective of the duration the interval dl starts being counted If
131. other probe in the event of faults is automatic if ro gt 0 Note In duty setting mode the compressor times are ignored 6 2 3 3 Continuous cycle IThe continuous cycle is a special function on MPXPRO that is used to keep the refrigeration cycle active continuously for a settable duration irrespective of the temperature inside the unit This may be useful when requiring a rapid decrease in the temperature including below the set point The continuous cycle is activated by pressing the UP amp DOWN buttons for more than 5 s from the supervisor or from the digital input The continuous cycle cannot be activated if e the duration of the continuous cycle is set to 0 cc 0 e the control temperature is less than the low temperature threshold AL AL2 in double thermostat e the device is OFF When the continuous cycle is running e the solenoid output and valve control are activated and the E icon is shown on the display e the low temperature alarm AL AL2 in double thermostat is active Note Opening the door digital input stops the cycle When closing the door again system resumes from the previous status The continuous cycle remains in standby if e the compressor protection times are set cl C2 C3 e the immediate or delayed alarm from external digital input delays the activation of the compressor e defrost dripping post dripping are active e the door is open in the same way as described previously The continu
132. ouble thermostat operating mode there is no recovery from outlet and intake probe errors using parameter ro Fig 6 d e In double thermostat operating mode there is no change in the set point in night time operation with C r4 Automatic night time set point variation p 28 reference to parameter r4 e The virtual probe has no meaning in Double thermostat function Below are the values of parameters St2 intake probe set point Sr and rd2 intake probe set point diffe rential required to activate the double thermostat function St2 Intake probe set point with double thermostat Code UOM Min Max St2 2C SF rl 12 Def 50 0 In the Double Thermostat function this indicates the value of the set point in relation to the intake probe Sr rd2 Control differential with double thermostat Code UOM Min Max Def A ro Control offset with probe error p 28 rd2 F 0 0 20 0 0 0 This represents the differential for the intake probe Sr in mode Double Thermostat mode rd2 0 the double thermostat function is disabled 6 2 3 2 Duty Setting Duty Setting is a special function used to maintain control in emergency situations with errors in the tem perature control probes The controller in fact even with just one temperature control probe operating outlet or intake attempts to adapt its operating characteristics to the special conditions see parameter ro If neither of t
133. ous cycle ends when pressing the UP amp DOWN buttons for more than 5 seconds e supervisor e the low temperature threshold is reached AL or AL2 in double thermostat e end of the continuous cycle duration cc e controller switched off from the supervisor logical OFF cc Continuous cycle operation duration Code UOM Min Max Def cc ore 0 15 1 This determines the compressor operating time in continuous cycle During the time set for cc the com pressor will continue operating so as to rapidly decrease the temperature including below the set point cc 0 Continuous cycle deactivated c6 Low temperature alarm bypass time after continuous cycle Code UOM Min Max Def c6 min 0 240 60 This determines the time in minutes during which the temperature alarm is disabled after the continuo us cycle If the temperature in the refrigerated unit at the end of the continuous cycle falls below the threshold AL or AL2 in double thermostat c6 delays the temperature alarm for the time set for the parameter When c6 elapses any temperature alarms are only activated after Ad MPXPRO 030220186 rel 2 0 07 02 2008 43 ia regolation OFF 15 min Fig 6 e A ro Control offset in the event of probe error p 41 C AL Low temp alarm threshold p 33 A AL2 Low temp alarm threshold on intake probe Sr p 58 C Ad Delay time for high and low temperature alarms
134. ow temperature alarm probe AA 1 Control 3 Outlet 5 Intake 7 Saturated evap 9 Auxiliary 32 gt E 1 1 10 2 Virtual 4 Defrost 6 Sup gas 8 Auxiliary defrost 10 Auxiliary 2 AO Reset high and low temperature alarm differential 32 C F C 2 0 0 1 20 0 Select alarm thresholds relating to the absolute set point AI O AL AH AL2 and AH2 are considered relative thresholds to the set point 33 flag C 0 0 1 1 AL AHAL2 and AH2 are considered absolute thresholds AL Low temp alarm threshold outlet probe Sm in Double thermostat 33 C F E 40 50 0 500 AH High temperature alarm threshold outlet probe Sm in Double thermostat 33 C F C 10 0 50 0 50 0 AL2 Low temperature alarm threshold on intake probe Sr Double thermostat only 58 CPE C 0 0 50 0 500 AH2 High temperature alarm threshold on intake probe Sr Double thermostat only 58 F C 0 0 50 0 50 0 Ad Delay time for_high and low temperature alarms 33 min C 120 0 240 Configure function of digital input DI on S4 0 input not active 4 start defrost 1 immediate external alarm 5 door switch with ALM 5 du 2 delayed external alarm comp and fans OFF S E Y a A display only 6 remote on off 3 enable defrost e 7 curtain switch A5 Configure function of digital input DI2 on S5 see A4 22 C 0 0 7 Configure solenoid control during external alarm immediate or delayed A6 l Lasi 52 min C 0 0 100 0 compressor valve always OFF 100 compre
135. p 33 aS Important For further information regarding assembly and the connections see paragraph 2 2 Wiring diagram and board connections p 12 A FE Assign advanced probe functions p 37 A P3 EEV PID superheat set point p 45 Valve opening SH Vs Valve opening Fig 6 f 44 6 3 Electronic expansion valve This section describes the electronic expansion valve and the settings for correct operation 6 3 1 Introduction 6 3 2 List of parameters 6 3 3 Generic functions 6 3 4 Control 6 3 5 Safety functions and alarms LSH MOP LSA LOP 6 3 6 Manual valve positioning from the supervisor 6 3 7 Read only status variables 6 3 8 Power failure 6 3 1 Introduction MPXPRO depending on the optional boards installed can manage different types of electronic expansion valve Specifically Option Option code Model of valve Stepper MX2OPSTP CAREL EV PWM MX20PPWM PWM 115 230 Vac PWM 110 210 Vdc To manage the electronic expansion valve two additional probes must be installed and suitably configu red e Temperature probe for measuring the superheated gas temperature at the evaporator outlet e Pressure probe for the measurement of the pressure saturated evaporation temperature at the evapo rator outlet In addition if the optional Stepper board is used MX2OPSTP an external 230 24 Vac 20VA transfor mer is required and optionally a backup battery in the event of pow
136. period Upon the fourth activation in such period the alarm is saved and requires manual reset from the user terminal or supervisor P10 EEV Main Enable close solenoid valve for low superheat LSH and or low suction temperature LSA Code UOM Min Max Def P10 flag 0 1 1 This allows the network solenoid valve to be closed in the event of low superheat status LSH and or low suction temperature alarm LSA e P10 1 default the unit that signals the LSH status and or LSA as well as closing the local solenoid valve also sends the signal across the LAN This enables the propagation of the closing request across the tLAN to the master and the other slaves To enable the closing of the network solenoid valve P10 1 the solenoid valve on the Master must be configured as a network valve parameter r7 1 being the only one enabled to accept control signals from the local network MPXPRO 030220186 rel 2 0 07 02 2008 49 D Important this function is designed for stand alone refrigeration units not centralised systems self contained units 50 e P10 0 the unit that signals the LSH status and or LSA does not enable the closing of the network and local solenoid valve P11 EEV LSA Low suction temperature threshold Code UOM Min Max Def Pll F 50 0 50 0 45 0 This represents the suction temperature below which the alarm is activated after the corresponding delay The threshold
137. r H5 PWM 1 anti sweat heaters hot wire if present see basic parameter Hhu p 26 PWM 2 not used e Sets of pre configured parameters To further assist the configuration phase MPXPRO features 6 sets of pre configured parameters for identifying different applications currently the 6 sets of parameters are all the same These pre configurations are can be selected using the procedure for loading the default parameters and then selecting the desired set of parameters 4 2 Start up procedure MPXPRO features a special procedure when first starting that ensures the controller operates in safe conditions This procedure is designed above all to help the installer when starting an installation in which the devices have not been previously programmed and or when replacing the controllers in existing systems In these cases this procedure avoids problems of conflicts on the supervisor or in the master slave network and the return of liquid refrigerant to the compressors very frequent situations when the instruments have not been programmed correctly When first powered up MPXPRO runs a procedure that freezes all the functions of the controller and only allows the user terminal or the remote control to be used to set the parameters that are considered critical for e correct communication of the controller with the supervisor management of the electronic valve The scope of this procedure does not cover the complete programming of the i
138. r display used to display the status of a variable directly set on the instrument 1 3 Functional diagrams The MPXPRO controllers are systems that manage refrigeration units for example one or a series of mul tiplexed showcases These systems are made up of control boards connected together in master slave mode each master board can manage up to 5 slave boards The functional diagrams below show some examples of typical applications Stand alone diagram and applicable options Fig 1 k Available options e expansion board for the management of CAREL E2V Stepper valves MX2OPSTP MX20PSTP MX20PPWM HE RS485 3 master MPXPRO A A MX20PA100 F MX20P48500 O only for MX20S tLAN 3 i Fg ri A emmm E E AAA EA aR e expansion board for the management of PWM valves Pulse Width Modulation MX2OPPWM e 0 10 Vdc expansion board MX2OPA100 In addition the MPXPRO slave MX20S slave boards MX20S can be fitted with the RTC and RS485 serial interface MX20P48500 MPXPRO 030220186 rel 2 0 0702 2008 Master slave network with terminals and displays master maximum 5 slaves MPXPRO slave 4 tLAN wany3 LAN slave 1 slave 2 tLAN 773 tLAN
139. r switch Door open Door closed 6 Remote ON OFF OFF ON 7 Curtain light switch Day Night 8 Continuous cycle Non attivo Attivo For further information see the configuration of the digital inputs parameters A4 to A12 The virtual digital input is useful for controlling coordinated functions within the LAN and saves on wiring costs If needed different functions can be configured on the different slaves meaning the change in status of the contact on the master determines the activation of different functions on the various slaves A9 Select digital input propagated from master to slaves Code UOM Min Max Def AQ 0 5 0 This can be configured only on the master unit enabling the propagation via tLAN of the status of one of the digital inputs on the master or sent by the supervisor to the slaves Based on the value associated with the parameter MPXPRO propagates only one of the digital contacts across the LAN according to the table on the side The slaves receive the status of the virtual digital input and activate the corresponding function according to the specific parameter A8 MPXPRO 030220186 rel 2 0 07 02 2008 6 2 Control This section describes the parameters corresponding to the advanced control functions 6 2 2Settings 6 2 3 Special functions 6 2 1 List of parameters Code Parameter Settings rl Minimum set point r2 Maximum set point 2 Analo
140. reading This parameter is normally not visible on the user terminal MPXPRO 030220186 rel 2 0 07 02 2008 65 66 rHb 0 rHb 100 means Svt Sm amp Sr means Svt SA To use this function new parameters for assigning the function a sensors have been added as already shown in the corresponding section Code_ Description UOM _ Cat Min___ Max Def FI Assign room temperature sensor SA A 0 ll 0 FL___ Assign room humidity sensor SU A 0 Il 0 FM__ Assign glass temperature sensor Svt A 0 Il 0 Fn__ Assign dewpoint value to a serial probe Sdp _ A 0 ul 0 Below is a summary diagram that shows the various types of operation of the anti sweat heaters based on the output used function output used parameters external application safety device anti sweat PWM 1 2 rHL 0 SSR modulation with 24 in the event of sensor error heaters second period for parameters rHt rHu used anti sweat heaters rHL 1 SSR instant modulation for in the event of sensor error fans parameters rHt rHu used 0 10Vdc FCS phase control modulation in the event of errors parameter rHu used AUX1 AUX2 rHt rHu direct constant capacity control AUX3 connection 8 2 5 Miscellaneous t0 Select optional terminal Code UOM Cat Min Max Def to 0 3 3 Available from firmware release 2 0 this is used to select whether the user terminal and or
141. rgency situations 6 3 4 Control The opening of the electronic valve is controlled based on the difference between the superheat set point and the actual superheat calculated by the probes The speed of variation the reactivity and the ability to reach the set point depend on three parameters Kp proportional gain parameter P4 Ti integration time parameter P5 Td differential time parameter P6 The ideal values to be set vary depending on the applications and the utilities managed nonetheless default values are proposed that allow good control in the majority of cases For further details see classic PID control theory P4 EEV PID Proportional gain Code UOM Min Max Def P4 a 0 0 100 0 15 0 This represents the amplification factor It determines an action that is directly proportional to the diffe rence between the set point and the actual superheat value It acts on the speed of the valve in terms of steps C The valve moves P4 steps for every degree centigrade variation in the superheat opening or closing whenever the superheat increases or decreases respectively It also acts on the other control factors and is valid in both normal control and with all emergency control functions High values gt fast and reactive valve e g 30 for applications CO carbon dioxide Low values gt slow and less reactive valve Example For CO carbon dioxide applications P4 30 P5 EEV PID Integration tim
142. ries are discharged the copy operation cannot be performed Replace the batteries Green LED flashing Batteries discharged during copy During the copy operation or at the end of the or at end of copy operation the battery level is low Replace the batteries and repeat the operation Red green LED flashing Instrument not compatible The parameter set up cannot be copied as the connected controller model is not compatible This error only occurs for the DOWNLOAD function check the code of the controller and run the copy only for compatible codes Red and green LED on Error in data being copied Error in the data being copied The data saved on the key are partly completely corrupted Reprogram the key Red LED on steady Data transfer error The copy operation was not completed due to a serious error when transferring or copying the data Repeat the operation if the problem persists check the key connections LEDs off Batteries disconnected Check the batteries Only on keys with battery Tab 7 a The key can be programmed not only directly from the MPXPRO controller but also directly from the PC using the special converter and the commissioning tool software Using this special connection the PC can completely program the key In particular the following func tions are possible e set the values of the parameters both unit and operating parameters e set the visibility of the parameters e set the par
143. rm p 24 A d5 Defrost delay on start up if enabled p 53 Door switch C H1 H5 H7 AUX output configuration p 24 C d8 Alarm bypass after defrost and door open p 30 C di Interval between consecutive defrosts p 29 C4 St Unit set point p 27 C r4 r6 Automatic set point variation in night status Enable control on intake probe Sr at night p 28 C H8 Select output switched with time bands light and AUX p 27 CX cc c6 Compressor management parameters p 43 24 Note e If more than one input is configured as the remote ON OFF the off status of one any of these determi nes the off status of the device e The ON OFF control from digital input has priority over the keypad and the supervisor e If the controller remains OFF for longer than the value set for basic parameter dl when the instrument is switched back on a defrost is performed A4 A5 A10 A11 A12 7 Curtain switch light __ _ __T Daystatus N Night status During night status 1 the night time set point Stn is used for control calculated based on the set point St plus the offset defined by basic parameter r4 Stn St r4 In addition if the control probe has been modified according to the configuration of basic parameter r6 2 the AUX or LIGHT output is deactivated based on the setting of basic parameter H8 During day status 1 Normal operation resumes set point St virtual probe used as c
144. rm involves C H4 Disable buzzer on terminal p 39 e the activation of the buzzer if enabled see parameter H4 e a message shown on the display HI high temperature alarm LO low temperature alarm The temperature alarms have automatic reset that is the alarm is reset directly by the controller when the temperature returns within the allowed range Note If the Double Thermostat function is enabled the messages HI2 and LO2 are also displayed The parameters corresponding to the temperature alarms are used to e assign the measurement probe e set the high and low temperature differential e set the temperature thresholds e set the activation delay A Double Thermostat p 42 5 5 1 List of parameters Code Parameter AA Assign high and low temperature alarm probe A0 Differential to reset high and low temperature alarms AI Select alarm thresholds relative to the set point or absolute AL Low temperature alarm threshold outlet probe Sm in double thermostat AH High temperature alarm threshold outlet probe Sm in double thermostat Ad Delay time for high and low temperature alarms Tab 5 x 5 5 2 Temperature alarm parameters AA Assign high and low temperature alarm probe Code UOM Min Max Def AA 1 10 1 This sets which physical probe is used to monitor the temperature and consequently signal any high or low temperature alarms AA Probe
145. robe Sv er6 1 Control probe Sreg Intake probe Sr 5 3 Defrost MPXPRO manages the most common defrost modes This section describes the basic configuration regarding e type of defrost features of the defrosts e times and alarms programmed defrosts 5 3 1 List of parameters Code Parameter do Select type of defrost dl Maximum interval between consecutive defrosts dt End defrost temperature read by Sd dP1 Maximum defrost duration d8 Bypass time high temperature alarm after defrost and door open td1 td8 Defrost events 1 to 8 d l Display defrost probe Tab 5 q MPXPRO 030220186 rel 2 0 0702 2008 5 3 2 Defrost parameters do Select type of defrost Code UOM Min Max Def do z 0 4 0 This establishes the defrost mode do type of defrost 0 heater by temperature safety time 1 hot gas by temperature safety time 2 heater by time 3 hot gas by time 4 heater by time with temperature control Tab 5 r The defrosts available can be divided by type and the way they end The combination of these variables determines the different types of defrost By type e Heater defrost the output configured as the defrost is activated to power the heaters on the evaporator At the same time control is stopped e Hot gas defrost First the evaporator is emptied of refrigerant Then the defrost output is activated to gradually inject h
146. s for capacitive loads The figure below shows a comparison between the two types of control Control by duration manages the fan speed based on the duration of the output pulse while control by pulses on the other hand determines the speed based on the position of the pulse in relation to the semi wave Vac F9 0 capacitive loads duration control i F9 1 inductive loads impulsive control oN 4 v l F9 0 coincide ear F9 1 dra coincide voltage beginning voltage end but F9 0 does not coincide with F9 1 Fig 6 6 7 Alarms This section describes the settings regarding the alarms 6 7 2 Temperature monitoring 6 7 3 Advanced alarms 6 7 1 List of parameters Code Parameter Temperature monitoring r5 Select maximum and minimum temperature monitoring probe rt Duration of the current maximum and minimum temperature monitoring session rH Maximum temperature acquired in the session rl Minimum temperature acquired in the session Advanced alarms 3 Enable end defrost signal by timeout Ed1 e Ed2 AL2 Low temperature alarm threshold on intake probe Sr only in Double thermostat mode AH2 High temperature alarm threshold on intake probe Sr only in Double thermostat mode Ar Enable alarms to be sent from slaves to master HS0 HS9 Alarm log event 0 to 9 6 7 2 Temperature monitoring MPXPRO allows the continuous and direct monitoring of any of the probes It
147. sconnect the power BX i 122 22 MX2OPSTPO a supply and remove the plastic cover Tight screw and nut after installing connector cable and EN do not connect to any GND Terminal i CAREL E2VCABS y H O Green _84 Brown Red 83 Yellow Black_82 White 81 Shield _80 24 Vac 20VA Suggested transformer j for one module TRADRBE240 with DIN rail TRAOOBE240 for panel installation Unique correct connection view no other possible connections E2VCON not suitable for refrigeration application Optional kit battery EVBAT00300 230 Vac For further information please refere to the EEV system guide code 030220810 available in the web site www carel com in the literature section Fig 2 d MX20PSTP board connections Terminal Connection Function 84 green Connection to CAREL EEV expansion valve 83 brown red CAREL 82 yellow black E2VCABS610 81 white cable 80 shield 79 12 Vbat Optional battery 78 GND 71 GO Power supply 76 G 75 EARTH 74 0 to 10 Vdc 0 to 10 Vdc output 73 GND A Tab 2 e Important before installing the expansion board disconnect the power supply and remove the plastic cover 2 4 PWM expansion board wiring diagram MX2PPWM AA DC AC output _ eli parsa ee oo i EN l PWM valve E Z Use Com ya ay Sowers wenn PWMac or PWIMdei ac de a ee _ va
148. slow modulation and vice versa rHd 0 disables modulating operation of the heaters based on the dewpoint enabling manual operation based on rHu rHL Type of load used for PWM outputs Code UOM Cat Min Max Def rHd si A 0 1 0 Determines the type of load connected to the modulating anti sweat heater output 0 resistive load modulation with a 24s period 1 inductive load fans instant modulation rHs Makeup of glass temperature sensor estimate Code UOM Cat Min Max Def rHs NV 0 100 20 Establishes the ratio between outlet probe and intake probe in the estimate of the inside temperature near the glass This parameter is normally not visible on the user terminal rHs 0 means Svt Sm rHs 100 means Svt Sr rHA Coefficient A for glass temperature sensor estimate Code UOM Cat in Max Def rHA SE NV 20 20 2 Represents the absolute difference between the room temperature read and the room temperature outside of the glass Useful if the room temperature sensor is located far away from the showcase Positive values decrease the room temperature value used This parameter is normally not visible on the user terminal rHb Coefficient B for glass temperature sensor estimate Code UOM Cat in Max Def rHb NV 0 100 22 Represents the ratio in hundredths between the inside temperature and outside temperature in the calculation of the glass temperature sensor
149. sms may be irreparably damaged e Do not use corrosive chemicals solvents or aggressive detergents to clean the device Do not use the product for applications other than those specified in the technical manual All of the above suggestions likewise apply to the controllers serial boards programming keys or any other accessory in the CAREL product portfolio CAREL adopts a policy of continual development Consequently CAREL reserves the right to make chan ges and improvements to any product described in this document without prior warning The technical specifications shown in the manual may be changed without prior warning The liability of CAREL in relation to its products is specified in the CAREL general contract conditions available on the website www carel com and or by specific agreements with customers specifically to the extent where allowed by applicable legislation in no case will CAREL its employees or subsidiaries be liable for any lost earnings or sales losses of data and information costs of replacement goods or servi ces damage to things or people downtime or any direct indirect incidental actual punitive exemplary special or consequential damage of any kind whatsoever whether contractual extra contractual or due to negligence or any other liabilities deriving from the installation use or impossibility to use the product even if CAREL or its subsidiaries are warned of the possibility of such damage
150. solenoid times 52 fla c I 0 1 0 protection times respected 8 d l Defrost probe 30 CPE F d 2 Second evaporator defrost probe 54 GEE F Time base for defrost dC 0 di expressed in hours dP1 dP2 and ddP in minutes 53 flag G 0 0 1 1 dl expressed in minutes dP1 dP2 and ddP in seconds Running time defrost time Ae 0 function disabled o i A dll Temperature threshold for running time defrost 55 F C 30 0 50 0 50 0 Manage pressure sensor during defrost 0 probe error disabled supervisor update enabled d12 1 probe error enabled supervisor update enabled 68 A 0 0 3 2 probe error disabled supervisor update disabled 3 probe error enabled supervisor update disabled Compressor off time for sequential stop defrost dS1 cae 56 min C 0 0 45 0 function disabled i i dS2 Compressor on time for sequential stop defrost 56 min C 120 0 240 ddt Additional end defrost temperature delta for power defrost mode 56 SCE C 0 0 20 0 200 ddP__ Additional maximum end defrost time delta for power defrost mode 56 min C 0 0 60 dn Nominal duration of the defrost for skip defrost 55 C 15 0 100 dis Number of daily defrosts 66 C 0 0 14 d2S Number of daily defrosts 66 C 0 0 14 Alarm management parameters ALM Assign high and l
151. ssansssessnssensasssennsnsen 8 VAMOGEIS E E EA 0 2 MECHANICAL AND ELECTRICAL INSTALLATION 11 2 1 Removing the top and side COVELS cssssssssessssesussssesssssessusssssusnsssssnsseussesssisanseusseseesssssesnsnsee 1 2 2 MX20 board wiring diagram and connections al 2 3 Stepper EEV expansion board wiring diagram MX2OPSTP 14 2 4 PWM expansion board wiring diagram MX2PPWM scssssscsssessssesessesesesseseeesettnsteeee 4 2 5 0 to 10 Vdc expansion board wiring diagram MX2OPA100 sssssssssssessssssessseeesseeesseeeee 5 3 USER INTERFACE 16 LIDI 6 3 2 Keypad and functions 16 3 3 Setting and editing the parameters 17 4 START UP 19 4 1 Recommended initial CONfIQUIatION sssssssesssssseesssseessssssesusssessssesseusssssesstseussssesssssesssnsee 9 4 2 Start up procedure Di 4 3 DEVICE start Up PAFAMELETS scio 20 4A Navigatio N 20 AB EXCEDUO N Siingi annigaia iae aiaiai 20 5 BASIC FUNCTIONS 21 BW Generalhconti guration resisae E 21 SA COMPO ae aa R 27 SODEM ae sac aeiihsiectites taasentqueenuednuian cease tee aeanntti 28 DA FANS cn iii 30 SS Temperature alerts mitra 32 6 ADVANCED FUNCTIONS 34 General COP MOULIN x pipriian Licio 34 6 2 CONtrOl Al 6 3 Electronic expansion valve 44 6 4 COMPMESSON ira 51 CODE int 53 6 6 Fan speed modulation 56 CH 57 6 8 HACCP Hazard Analysis and Critical Control Point ssssssssesssseessssssssssssssssss
152. ssor valve always ON i A7 Delay time for delayed external alarm 24 min C 0 0 240 A8 Configure function of virtual input see A4 40 C 0 0 7 Select digital input propagated from Master to Slave O digital inputs not propagated 3 DI3 propagated ia 1 DI1 propagated 4 DI4 propagated a0 S 9 0 gt 2 DI2 propagated 5 DI5 propagated A10 Configure function of digital input DI3 on S6 see A4 22 C 0 0 7 All Configure function of digital input DI4 on 7 see A4 22 C 0 0 7 A12 Configure function of digital input DI5 see A4 22 0 0 7 Enable send alarms from Slave to Master Ar 58 flag C 1 0 1 1 alarm signals enabled 70 MPXPRO 030220186 rel 2 0 07 02 2008 Code Parameter Page UOM Type Def Min Max Note Evaporator fan management parameters FAn Configure fan management 0 fans always on FO 1 fans controlled based on the temperature difference between the virtual probe Sv or Sr in double 30 0 0 2 thermostat and evaporator temperature Sd 2 fans controlled based on the temperature difference of the evaporator Sd FI Fan temperature control threshold only if FO 1 or 2 31 SCE C 5 0 50 0 50 0 Enable Di fans with controller off 31 2 denn flag C 1 0 1 FAn Fz Stop n
153. st Code UOM Min Max Def d6 3 0 2 1 MPXPRO 030220186 rel 2 0 07 02 2008 During defrost different types of messages can be shown on the user terminal and on the display e d6 0 the message dEF is displayed alternating with the value read by the selected probe e d6 1 the last temperature measured before the defrost remains displayed Based on the type of defrost the normal display resumes when reaching the end defrost set point when the temperature to be displayed is lower than the temperature currently frozen on the display or in any case after the end of the alarm bypass period after defrosting basic parameter d8 e d6 2 message dEF fixed on the terminal display Note When t 0 the defrost messages are also disabled on the display N B The unit remains in defrost status until the end of the post dripping phase and consequently the display reflects this until the end of this phase H2 Disable keypad functions Code UOM Min Max Def H2 0 5 l H2 can be set to deactivate access to some functions from the keypad The individual buttons are in any case active for displaying the values but only the functions are disabled according to the table below H2 Functions disabled H2 0 set F parameters modify set point H2 1 Jall active H2 2 set F parameters modify settings set point from remote control
154. st during the dripping phase the expansion valve can be forced open to the initial value set for cP1 for a time equal to Pdd This means greater immunity of the instrument to return of liquid to the compressor rack due to an excessively high evaporator temperature PSb EEV ADV Valve standby position Code UOM Min Max PSb steps 0 400 Def 7 This indicates the position as the absolute number of steps that the valve must move to after having com pletely closes to restore the elastic operating conditions of the valve spring by releasing the compression for stepper valve only Note the value of this parameter represents the absolute position of the valve during the closing phase value read using the advanced parameter PF Phr EEV ADV Enable fast update of the valve parameters to supervisor Code UOM Min Max Def Phr flag 0 1 0 This is used to enable the fast update to the supervisor of the variables relating to the electronic expan sion valve such as PF absolute position in number of steps for stepper valves only e SH superheat e PPV position as a percentage e tGS superheated gas temperature e tEu saturated evaporation temperature Useful in commissioning phase or start up Phr 0 fast update disabled update every 30 s Phr 1 fast update enabled update every 1 s OSH EEV ADV Superheat Offset for modulating thermostat Code UOM Min Max Def OSH K
155. stat Code UOM Min Max Def AL C F 50 0 50 0 4 0 Determines the activation threshold for the low temperature alarm Its meaning depends on the value of the parameter A1 A1 0 AL is the relative threshold for the low temperature alarm expressed as difference between the current set point and the value set for AL SAL St AL In this case the alarm is disabled if AL 0 Changing the set point also changes the alarm thresholds by the same amount Al 1 AL is the absolute threshold for the low temperature alarm SAL AL The alarm is disabled if AL 50 Changing the set point does not affect the thresholds The low temperature alarm features automatic reset that is if the temperature monitored falls below the threshold causing the activation of the alarm it is automatically deactivated when the temperature rises back above the threshold plus the differential AO AH High temperature alarm threshold outlet probe Sm in double thermostat Code UOM Min Max Def AH C F 50 0 50 0 10 0 Determines the activation threshold for the high temperature alarm Al 0 AH is the relative threshold for the high temperature alarm expressed as sum between the current set point and the value set for in AH SAH St AH The alarm is disabled if AH 0 Changing the set point also changes the alarm thresholds by the same amount Al 1 AH is the absolute threshold for the low temperature alarm SAH AH
156. supply 230 V 50 mA max rz MPXPRO 030220186 rel 2 0 07 02 2008 19 Default configurations ool Se oe 37 36 35 34 33 32 31 30 29 28 E Co JJ Sa T RATIOMETRIC e I aG di w ca O ca a PROBE Sm DEFROST TEMPERATURE Z PROBE Sm W cc W a LU E o x lt L AIR OFF TEMPERATURE Z PROBE TsuctEEV SUCTION TEMPERATURE Z EVAPORATION PRESSURE PROBE T PsatEEV i da gt A Important The availability of the output depends on the code of the controller consequently check the hardware before making the connections C A5 A12 Digital input configuration p 22 A Fd FE Assigning the functions of the probes p 37 A P3 U6 L6 Analogue input configuration p 35 see Restoring the default parameter settings C H1 H5 H7 AUX output configuration p 24 C Hhu Hardware configuration p 26 AN NB Based on the specific application these parameters may not be useful for example if the electronic expansion valve is not used In these cases simply confirm the default values set on the controller 20 e Initial configuration of the outputs The default configuration envisages Relay 1 solenoid valve compressor not modifiable Relay 2 light see basic parameter H7 Relay 3 heaters defrost not modifiable Relay 4 fans see basic parameter H1 Relay 5 alarm see basic paramete
157. t 22 or 33 Set Confirm the password the first type C parameter is displayed Exit parameters Prg 5s The changes are saved Defrost Local defrost del dFb start defrost call Yy dFE end defrost call Multiplexed defrost def 5s dFb start defrost call From master only Set amp Y dFE end defrost call Auxiliary Continuous cycle A oe 5s ccb start continuous cycle call ax amp Y ccE end continuous cycle call AUX output A Network functions Copy parameters from master to slave Prg amp Set 55 master only 5 Enter password default 66 Set For further info see par 3 3 4 Copy parameters from master to slave Display network unit status from master Prg eee Select slave unit see par 3 3 2 Display network unit status from master mute e Default Reset default parameters Prg mute at start up Alarms Alarm log re 55 A et Enter password default 44 ax amp W Set see par 3 3 5 Alarm log Manual alarm reset Prg n A TES indicates the alarms have been reset Mute buzzer and disable alarm relay Prg mute HACCP HACCP menu Prg i see par 3 3 6 HACCP alarms Tab 3 b Note Resets the alarm delays Disables the slave offline signals for one minute MPXPRO 030220186 rel 2 0 07 02 2008 3 3 Setting and editing the parameters The following paragraphs explain Table 3 a Functions and associated buttons and the other modes for setting the MPXPRO 3 3 1 Selecting the network unit from master unit onl
158. ted parame ters It can be seen how the various inputs are divided into uniform groups in which each input has the same features and can be configured by the same parameter group probe parameter Types of probes physical NTC PTC PT1000 NTCL243 JOto5Vdc Oto 10V 4t020mA DI ratiometric_ dcinput input 1 1 S2 S3 P1 Pi 0 Pi 1 P1 2 P1 3 default 2 s4 pn P2 P2 0 P2 1 P2 2 P2 3 DI1 DI2 5 DI2 default P2 0 3 3 S6 DI3 P3 P3 0 P3 1 P3 2 P3 3 P3 4 DIZ default P3 0 3 4 S7 DI4 P4 P4 0 P4 1 P4 2 P4 3 P4 4 P4 5 P4 6 DI4 default P4 0 3 Tab 6 a Analogue inputs S4 to S7 can also be used as digital inputs In this case simply configure the input as an NTC PTC Pt1000 temperature probe and then suitably set parameters A4 A5 A10 A11 A12 In fact groups 2 3 4 can be used in a mixed manner that is even if configured for NTC PTC PT1000 temperature probes one of the probes can be used in this mode while a digital input can be connected to the other input In this case the system can recognise the type of input connected The only limitation is that the use of one type of probe is set the others cannot be used Example 1 selecting the type of probes P2 0 S4 DI1 and S5 DI2 standard NTC temperature probes S4 DI1 can be used as the evaporator outlet temperature probe Fd 4 S5 DI2 can be used as the remote ON OFF digital input A5
159. ter unit select the desired unit par 3 3 1 Selecting the network unit 3 Scroll the list of alarms by pressing UP and DOWN 4 Select the desired alarm by pressing SET showing the alarm code hours minutes and duration of the alarm using the UP and DOWN buttons 5 To return to the list press SET again 6 To exit the alarms menu press PRG for 5 seconds or alternatively wait 60 seconds without pressing any button To delete the alarm log press SET amp UP amp DOWN for 5 seconds the display will show the alarms deleted message rES MPXPRO 030220186 rel 2 0 07 02 2008 Q The terminal connected to the master unit only allows a general overview of the entire local network Parameter categories Parameter category Prefix Display Icon Probe Pro A Control r at w Compressor c CMP O Defrost d dEF se Alarms A ALM A Fans F FAn SI Expansion valve E Eud ON Configuration H CF AUX Log HS Hst A HACCP H HcP HACCP Tab 3 c 3 3 6 HACCP alarms The most recent 6 HACCP alarms HA HF can be displayed and managed inside the HACCP menu 1 Access the HACCP menu see Table 3 b Functions and associated buttons 2 If using a master unit select the desired unit par 3 3 1 Selecting the network unit 3 Scroll the list of alarms by pressing UP and DOWN 4 Press SET to select the desired alarm
160. that as well as the display also features a keypad with four buttons for navigating the device function menus e Supervision software Commissioning tool 3 1 Display OOO The IR U display Fig 3 a shows the readings of the probes connected to the controller see parameter t1 p 22 and t2 p 38 and the general status of the device using the corresponding icons The numeric display can show values in the range 50T150 C with decimal resolution in the range 19 9T19 9 C see parameter 6 p 38 3 2 Keypad and functions The IR X user terminal Figure 3 b is an interface that as well as displaying the values shows the general status of the device using icons and provides access to the MPXPRO parameter configuration menu using the keypad located next to the display Depending on the type of connection and the configuration of the local network the entire network can be controlled from just one point The table below describes the main functions that are immediately obtainable by pressing the specific combination of keys Further information on the procedures for managing the network and setting the parameters is shown in the following paragraphs Icons and functions Icon meaning function status Description On Off Flashing Ga Compressor Compressor output status Active Not active Activation delayed by protection times KB Fan Fan output status Active Not active Activa
161. the event of mains power failures For further information see the instruction sheet on the electronic valve code 050000340 Alternatively a backup battery can be installed that provides power for enough time to close the valve When next restarted the system is automatically rebooted and resumes normal control 6 4 Compressor This section describe the advanced settings that are useful if MPXPRO is used in non centralised systems that is where the compressor operating times are managed to avoid sudden starts stops that may cause damage In this section the compressor control output is assumed to be connected directly to a compressor MPXPRO 030220186 rel 2 0 07 02 2008 5I A Fd FE Assign advanced probe functions p 37 function of parameter cO start up refrigeration i request sile lle Pe Lara alal OFF ON compressor OFF co Fig 6 k function of parameter c1 refrigeration 4 7 7 i an ON request _ 1 Meee iii OFF compressor Fig 6 1 function of parameter c2 i i meme a ON refrigeration k K request __1 Tusio held ON compressor i Sierrei OFI C2 lt gt Fig 6 m function of parameter c3 refrigeration ae pooee es ON request Ty og i ON compressor i Fig 6 n A c4 ON time for duty setting operation p 43 6 4 1 List of parameters Code Paramenter c0 Enable compressor and fan delay on power up cl Minimum time betwe
162. the instrument The different sets identify typical groups of parameters different for applications Hdn Note 0 Only the current set of parameters is available The levels of visibility cannot be modified and only the visible parameters can be set 1 6 Sets of parameters other than the current set are available The programming key or commissioning tool can be used to set the visibility attributes and upload the values of all the parameters The procedure for restoring the default parameters only acts on set 0 The value of Hdn must be identical in all the sets loaded on the controller 6 1 8 Virtual digital input configuration of the virtual digital input for activation of the curtain switch MPXPRO can propagate the status of a digital input across the master slave sub network This input is called the virtual digital input Its status may derive e from a digital input directly connected to the master e from the supervisory system On every controller in the sub network this input can be used to activate any function of a generic digital input including functions that are different from the others on the others instruments The slave unit is not concerned with the actual origin of the status received The master unit determines the origin by parameter A9 To configure the curtain switch and consequently the changeover from day to night status in the entire local network by propagation of the virtual digital input the d
163. tion see the HACCP alarms section on p 18 59 HAn Number of HA alarms Code UOM Min Max Def Read only parameter HAn 0 E Indicates the number of HA alarm events A maximum of 15 alarms can be saved while only the last 3 can be viewed in detail HA HA1 HA2 6 8 3 Type HF HACCP alarms The type HF HACCP alarm is generated if following a power failure for an extended time gt 1 minute the temperature read by the probe set for parameter AA exceeds the high temperature threshold AH This therefore records the alarms due to power failures In this case too if the Double Thermostat function is active reference is made to the threshold AH2 Temperature HF Alarm Black out AH set point St gt Time Fig 6 u HF HF1 HF2 HF alarm events i Alarm code hour UOM Min Max Def minutes and duration HF HF2 y Year 0 99 M Month 1 12 Read only parameter d Day 31 h Hour 0 23 n min 0 59 alarm duration 0 240 These parameters are accessed from the HACCP menu The last 3 alarms can be displayed alarm code month day hour minutes duration of the alarm The order of the alarms listed is progressive HF is the most recent alarm When the list is full and a new alarm is generated the oldest one is deleted Example Code Alarm code hour minutes and Meaning duration HF HF Y_ 03 M 08 Indicates that the HF alarm w
164. tion disabled externally or by procedure in progress 3 Defrost Defrost output status Active Not active Activation disabled externally or by procedure in progress AUX Aux Auxiliary output status Active Not active Alarm Alarm status during normal opera _ Pre activation of a delayed No active alarm Active alarms tion or from digital input external digital alarm Clock RTC option Control in night time operation Control in daytime operation Clock alarm at start up comes on to indicate the option is present Bog Light Local or network light output status Active Not active A Service General service signals On the master indicates the upda No malfunction Malfunction System error Contact service te of the parameters to the slave HACCP HACCP HACCP alarm signal Function enabled Function not enabled HACCP alarm active signal on the display HA HF we Cont cycle Continuous cycle function status On Off Request in progress Tab 3 a Catego Function Keypad controls Display Notes gory Buttons Duration p ay Set point Temperature set point Set Set point value flashin A di Change the set point ax Of W Set Save set point and return to initial display Access to the parameters Type F parameters frequent Prg 5s The first type F parameter is displayed mute Type C parameters configuration or A Prg amp Set 55 advanced A Enter password defaul
165. uld not be enabled on all the instruments indiscriminately but rather one at a time and only for service and test operations C rd Temperature set point differential p 27 A P3 EEV PID superheat set point p 45 46 MPXPRO with PID control tends to maintain the actual superheat calculated based on the probe rea dings around the value set for this parameter This is done by gradually varying the opening of the valve based on the difference between the actual superheat and the set point Important The set point value calculated depends on the quality of the installation the position of the probes and other factors Consequently depending on the installation the set point read may deviate from the actual value Set point values that are too low 2 to 4 K may cause problems involving the return of liquid refrigerant to the compressor rack cP1 EEV ADV Initial valve position when control starts Code UOM Min Max Def cP1 0 100 30 This is used to set the position of the valve as a percentage when control starts High values ensure Intense and immediate cooling of the evaporator when each call is sent however may cause problems If the valve is oversized with reference to the cooling capacity of the unit Low values on the other hand allow a more gradual and slower action Pdd EEV ADV Initial valve position maintenance time after defrost Code UOM Min Max Def Pdd min 0 30 10 At the end of a defro
166. um and minimum temperature monitoring probe at 0 disabled 4 defrost probe Sd 8 auxiliary defrost probe E r5 1 control probe Sreg 5 intake probe Sr 9 auxiliary probe 58 a 0 0 10 2 virtual probe Sv 6 superheated gas probe 10 auxiliary probe 2 3 outlet probe Sm 7 saturated evaporation probe i rt Duration of current maximum and minimum temperature monitoring session 58 hours C 0 999 rH Maximum temperature acquired in the session 58 C F C E 2 rL Minimum temperature acquired in the session 58 C F E Enable night time control on intake probe Sr r6 O control on virtual probe Sv at NIGHT 28 flag 0 0 1 1 control on intake probe Sr at NIGHT ro Control offset in the event of probe error J 4l F C 00 00 200 Enable solenoid output on Master as LAN solenoid only 17 as 26 flag Cc 0 0 1 0 compressor output for local valve 1 compressor output for network valve MPXPRO 0302 20186 rel 2 0 0702 2008 69 Code Parameter Page UOM Type Def Min Max Note Compressor management parameters MP co Enable compressor and fan delay on power up 52 min C 0 0 240 cl Minimum time between successive starts 52 min C 0 0 15 cmp 2 Minimum off time 52 min C 0 0 15 3 Minimum on time ___ A _ 52 min C 0 0 15 e la ON time for operation in duty setting Toff 15 minutes fixed 43 ai
167. uration of the defrost in Skip defrost mode Code UOM Min Max Def dn 0 100 75 The nominal duration represents the critical threshold below which the next defrost can be skipped The value is expressed as a percentage and is based on parameter dP1 maximum defrost duration on main evaporator or dP2 maximum defrost duration on auxiliary evaporator depending on the evaporator in question To determine the effective value of the nominal duration corresponding to the main evaporator dn dnl edPl 100 The remarks are identical for the second evaporator dn2 1 apo 100 e Running time Running time is a special function that allows MPXPRO to determine when the refrigeration unit needs defrosting In particular it is assumed that if the evaporator temperature remains continuously below a certain set threshold d11 for a certain time d10 the evaporator may be excessively frosted Defrosting in this situations may resolve the problem To the side is the graph that explains the operating principle d10 Defrost time in Running time mode Code UOM Min Max Def d10 min 0 240 0 This indicates the time during which control remains active when the evaporation temperature is lower than the value set for d11 When the time set for d10 has elapsed a defrost call will be sent and the defrost performed in the mode set in the defrost section The count is reset if the temperature returns above t
168. urface 3750V insulation main insulation between the independent relay outputs 3mm in air 4mm on surface 1250 V insulation model Output voltage maximum current available not isolated from the board earth PWM analogue outputs 1 2 MXxxx 2 3 XxXxX 12 Vdc 20 mA max for each PWM Type of connection Cross section Maximum current model relay power supply _ probes Connections aes SI n o TA pigi ache for cables from 0 5 to 2 5 mm 12 A MXxxxxxx C 1 0 x plug in 180 plug in 180 plug in 180 The correct sizing of the power cables and the connections between the instrument and the loads is the installer s responsibility none MXxxxxxx A B C x Case support base MXxxxxxx G X support base and cover MXxxxxxx M N O x Assembly on plastic spacers MXxxxxxx A B C x on DIN rail MXxxxxxx G M N O x No option MXxxxx0x 0 1 2 x Clock with backup battery MXxx M S Xxxxx RS485 interface MXxx M S xxxxx Parameter and firmware customisation MXcoooxxn cc customer identification n progressive customisation MPXPRO 030220186 rel 2 0 07 02 2008 73 error at 25 C 10 ppm 5 3min year error in the temp range 10T60 C 50 ppm 27min year Clock ageing lt 5 ppm 2 7min year Discharge time typically 6 months 8 months maximum Recharge time typically 5 hours lt 8 hours maximum Operating temperature MX00000x A B G
169. vision into F C A To simplify navigation within the MPXPRO menus from version 2 0 all the parameters have been divided following the philosophy of the manual F frequently used parameters C basic configuration parameters A advanced configuration parameters In this way if MPXPRO is to be used as a standard controller with the default configurations as described in the basic section of the manual only the type C parameters need to be configured The access procedures remain unchanged therefore F no password C password 22 A password 33 In this way entering password 33 provides access to all the parameters available The list of parameters at the end of the manual highlights this division 8 2 2 List of new parameters Parameter description dis Number of daily defrosts d2S Number of daily defrosts rHu Hot wire PWM 1 and 2 activation time on period of 240 seconds rHt Anti sweat activation period rHo Anti sweat heater modulation offset rHd Anti sweat heater modulation differential rHL Type of load for PWM outputs MPXPRO 030220186 rel 2 0 07 02 2008 63 64 rHS Makeup of glass temperature sensor estimate rHA Coefficient A for glass temperature sensor estimate rHb Coefficient B for glass temperature sensor estimate tO Select optional terminal H3 Remote control enable code d12 Pressure probe management during defrost Tab 8 2 8 2 3 Staggered defrosts
170. which the features of the applications require different settings Examples Control inside a cold room is normally performed using two temperature probes specifically the intake temperature is not used In this case the possible configuration may be e FA 1 Outlet temperature measured by probe 1 Sm S1 e Fb 2 Defrost temperature measured by probe S2 Sd S2 e Fc 0 Intake temperature absen Alternatively e FA 1 Outlet temperature measured by probe 1 Sm S1 e Fb 3 Defrost temperature measured by probe S3 Sd S3 e Fc 0 Intake temperature absen t1 Select display on the main terminal Code UOM Min Max Def tl 0 14 12 If the device that is being configured has its own main terminal user terminal with keypad parameter t1 can be used to select the probe whose value is displayed during normal operation Value of t1 Probe displayed 0 No probe displayed Lal S1 to S7 8 11 S8 to S11 serial probes 12 Sreg Control probe Default 13 Sv Virtual probe 14 Set point Tab 5 d To configure the value shown on a second display see advanced parameter t2 5 1 3 Digital inputs Based on the configuration of the probes MPXPRO manages up to 5 digital inputs directly connected to the board and 1 virtual digital input shared by the master with the slaves across the local network The function of each individual input depends on the setting of a specific parameter The following
171. work with a maximum of 5 units and connect to the supervisor network for complete monitoring of the installation MPXPRO is only available in the split version for DIN rail assembly with the user terminal separate from the power unit It can be configured using a remote terminal remote control supervisor and commissio ning software on a PC directly connected to the user terminal 1 2 Components The series of MPXPRO controllers is made up of Fig 1 a MPXPRO master MX20M Fig 1 a Device that can independently control a refrigeration unit using a wide range of probes digital or analo gue inputs and outputs specially designed and sized for the specific functions In addition it is fitted with a clock RTC for the synchronisation of the events in the tLAN and features connection to the supervisor network RS485 MPXPRO slave MX20S Fig 1 b Device similar to the master version without the serial board RS485 and Real Time Clock RTC These functions are carried out by the master unit connected in the LAN or alternatively can be included by Fig 1 b installing the optional clock board and RS485 interface MX20P48500 Stepper EEV expansion board MX20PSTP Fig 1 c Optional board for controlling a CAREL EV electronic expansion valve driven by stepper motor Model MX2OPSTPO also has a 0 to 10 V modulating output for the control of external actuators It is installed on the main board using special
172. x 39 049 9716600 e mail carel carel com www carel com Agenzia Agency MPXPRO 030220186 rel 2 0 07 02 2008
173. xxxx E A xx 3590 V insulation insulation from relay outputs 3mm in air 4mm on surface 1250 V insulation ST 52 and 53 NIC MXoxx000 or NIC PIC PT1000 and NTC L243 MXxxxx 1 2 3 4 5 6 7 8 XX 54 55 DII D2 NTC MXxxxxOxxx or NTC PTC PT1000 and NTC L243 MYooxx 1 2 3 4 5 6 7 8 XXX voltage free contact contact resistance lt 10 ohm closing current 6 mA 56 NIC EET or NTC PTC PT1000 and NTC L243 MXxxx 1 2 3 4 5 6 7 8 XX 0 to 5 V ratiometric MXXxxxxxxxx Inputs DI3 Rigore contact contact resistance lt 10 ohm closing current 6 mA 57 NTC MXxxxxOxxx or NTC PTC PT1000 and NTC 1243 MX00x 1 2 3 4 5 6 7 8 700 0 to 5V ratiometric 4 to 20 mA 0 to 10 V MXxxxxxxxx DI4 voltage free contact contact resistance lt 10 ohm closing current 6 mA DI5_ _ voltage free contact contact resistance lt 10 ohm closing current 6 mA f Maximum distance of probes and digital inputs less than 10 m Note in the installation keep the power and load connections separate from the probe digital inputs repeater display and supervisor cables 10 k_at 25 C range from 50 C to 90 C T z z Std CAREL NTC 1 Cin the range from 50 C to 50 C danse i 3 C in the range from 50 C to 90 C 985 at 25 C range from 50 C to 150 Std CAREL PTC i 2 C in the range from 50 C to 50 G specific model ee 4 C in the range from 50 C to 150 C 1000_at 0 C range from 50 C to 90 C Pt 1000 3 C in the range from 50 C t
174. y If using a user terminal connected directly to the master unit the select network unit function can be used to choose the desired unit After having identified the required setting e g edit parameters access the alarm log then e Scroll the list of slave units available pressing UP or DOWN e Press SET to select the desired unit e To return to the normal display press PRG The control will in any case return to the normal display after a timeout of around 1 minute NB uM indicates the master unit u1 indicates slave unit 1 u30 indicates unit 3 is offline This specific procedure can be managed from the master unit only if the user terminal is connected to a slave unit the procedure is limited to that slave only 3 3 2 Displaying the network unit status from the master Virtual Console If using a user terminal connected directly to the master unit the status of any slave unit can be displayed as if the terminal were connected to the selected unit Procedure 1 Access the Display network unit status from master function see Table 3 b Buttons and Functions 2 Scroll the list of units available by pressing UP or DOWN 3 Use SET to select the unit and display the status 4 The display shows the status of the selected unit that is the value shown on the display and the icons refer to the selected unit in the sub network 5 To return to the normal display press PRG The control in any case returns to t
175. y cover can be set to perform the following functions through VPM e Load the parameters for a controller onto the key see Fig UPLOAD the key acquires all the parame ters from the controller e Copy from the key to a controller see Fig DOWNLOAD the key sends the operating parameters to the connected controller Extended copy from the key to a controller see Fig EXTENDED DOWNLOAD the key sends all the parameters to the connected controller both the operating and the unit parameters Warning the parameters can only be copied between instruments with the same code while the UPLOAD operation can always be performed The UPLOAD and or DOWNLOAD and DOWNLOAD EXTENDED functions are performed as follows 1 open the rear cover on the key and set the 2 dipswitches according to the desired operation see Figure 7 c 7 d 7 e UPLOAD DOWNLOAD EXTENDED DOWNLOAD 2 close the cover and insert the key in the connector on the controller 3 press the button and check the LED red for a few seconds then green indicates that the operation was completed correctly Other signals or the flashing of the LED indicates that problems have occur red refer to the corresponding table 4 at the end of the operation release the button after a few seconds the LED goes OFF 5 remove the key from the controller Table of LED signals LED signal Error Meaning and solution Red LED flashing Batteries discharged at start copy The batte

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