MPXPRO Electronic controller User manual NO POWER & SIGNAL CABLES TOGETHER READ CAREFULLY IN THE TEXT! Integrated Control Solutions & Energy Savings
ENG IMPORTANT WARNINGS NO POWER & SIGNAL CABLES TOGETHER READ CAREFULLY IN THE TEXT! CAREL bases the development of its products on decades of experience in HVAC, on the continuous investments 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 available on the market.
ENG Content 1. INTRODUCTION 7. OPTIONAL CONFIGURATIONS 7 7.1 1.1 Models ............................................................................................................... 7 1.2 Functions and main characteristics ............................................................. 7 2. INSTALLATION 11 2.1 MPXPRO: DIN rail assembly and dimensions ........................................ 11 2.2 Main board: description of the terminals ................................................ 12 2.
ENG 1. INTRODUCTION • Display and master/slave network cable length extended to max100 m • advanced superheat control with protection for low superheat MPXPRO is an electronic controller for the for the complete and advanced management of stand-alone or multiplexed showcases or cold rooms, with or without built-in electronic expansion valve driver. It is designed for DIN rail assembly and comes with plug-in screw terminals.
ENG MPXPRO has been designed to offer maximum installation flexibility and significant energy saving when fitted with the CAREL E2V or PWM electronic expansion valve driver. It features 7 analogue inputs for probes and 5 digital inputs, configurable by parameter.
ENG Master/Slave boards (MX30*24HO0) 0 to 10 Vdc expansion board (MX3OPA1002) With 2 PWM outputs and PWM driver board with 0 to 10 Vdc output incorporated. Optional board used to manage the evaporator fans and anti-sweat heaters with a 0 to 10 Vdc control signal. Fig. 1.f Fig. 1.i Stepper EEV expansion board (MX3OPST***). RTC and RS485 interface card (MX3OP48500) Optional board for controlling a CAREL E2V electronic expansion valve driven by stepper motor.
ENG USB/tLAN converter (IROPZTLN00) VPM programming tool (Visual Parameter Manager) Converter used to connect a personal computer to an MPXPRO controller using the special connection available on the user terminals or remote display and, with the VPM program (Visual Parameter Manager), to complete the configuration and commissioning operations. The program can be downloaded from http://ksa.carel.com.
ENG 2. INSTALLATION MPXPRO optional connections 2.1 MPXPRO: DIN rail assembly and dimensions 111 137 PUSH MPXPRO High voltage 1 81 Fig. 2.d 109 1. Press the cover to remove it; Fig. 2.a Accessing the terminal block 2 Fig. 2.e 2. Plug the MXOPZKEYA0/IROPZKEYA0 key into the connector provided. Fig. 2.b Note: for models with firmware version ≤ 1.2 only use the IROPZKEYA0 key. To remove the cover: 1. press the sides; 2. remove the cover. Fig. 2.c To remove the covers: 1.
ENG 2.2 Main board: description of the terminals Note: before performing any operations on the control board, disconnect the main power supply by turning the main switch in the electrical panel OFF. Below is the wiring diagram for the MPXPRO main board in the version with 5 relays. The connectors are screen printed to simplify the electrical connections.
ENG 2.3 E2Vdriverexpansionboard(MX3OPSTP**): terminals and connections GND The input of the load 0 to 10 Vdc must feature reinforced insulation with reference to its internal power supply E2V Driver 2.4 PWM driver expansion board (MX3OPPWM**): terminals and connections 0 to10 Vdc PWM Driver 73 74 Analogic 10 Vdc GND output only for MX3OPST(H,U)0* Tight screw and nut after installing connector/cable and E2V.
ENG 3. Master/Slave network with shared user terminal and local remote display. 2.6 Functional diagrams The MPXPRO controllers are systems that manage refrigeration units (for example, one or a series of multiplexed showcases). These systems are made up of control boards connected together in Master-Slave mode; each Master board can manage up to 5 Slaves.
ENG 2.8 General connection diagram Power Supply AC 115-230 V 200 mA max AUX3 ( 1 2 3 L N NO NC 4 ( 5 C 6 8 9 NO NC R2 R3 R1 MX30**H** 7 NO C R1 AUX2 ( ( ( ( 10 11 12 13 C NO NO NC R3 R4 10 (2) A N.O. 6 (4) A N.O. 6 (4) A N.C. S2 S3 S4/ GND DI1 20 mA max totally MCHRTF LOAD LOAD 12 PWM modulating fans SSR1 Trim heater MX3OP48500 (only for slave models MX30S*****) CLOCK and SERIAL INT. MX30P485** -10T50 S1 R= 470 Ω Mounted on MX30S***** R5 6 (4) A N.O.
ENG 2.9 Installation 2.10 Programming key (copy set-up) For installation proceed as follows, with reference to the wiring diagrams: 1. before performing any operations on the control board, disconnect the main power supply by turning the main switch in the electrical panel OFF. Then remove the plastic side cover and/or the covers to make the electrical connections; 2. avoid touching the control board, as electrostatic discharges may damage the electronic components; 3.
ENG LED signal Cause Orange flashing Controller not compatible Red flashing Incorrect use of the key Orange steady Data copy error Off Key not powered or fault Meaning The parameters cannot be copied due to incompatibility of the firmware versions Commissioning via terminal/display (with IROPZTLN00 converter).
ENG 2.12 Settingthedefaultparameters/loadingthe parameter sets Introduction Seven different sets of parameters are saved in the MPXPRO memory. Set 0, called the working set, contains the set of parameters used by MPXPRO during normal operation. This set is loaded whenever MPXPRO is started, and the parameters can be modified at any time from the terminal, supervisor, remote control, VPM and programming key.
ENG 3. USER INTERFACE The front panel of the user terminal (IR00UG****) includes the display and the keypad, featuring 4 buttons that, pressed alone or in combination, are used to program the controller. The remote display (IR00XG****) is only used to show the values of system variables. 3.1 User terminal and remote display The display shows measurements in the range –50 and +150 °C, according to the type of probe used. The measurement is displayed with resolution to one tenth between –19.9 and + 19.9 °C.
ENG 3.
ENG 3.3 Programming Accessing the type F parameters The parameters can be modified using the front keypad. Access differs according to the type: Frequent (F), configuration (C) and advanced (A) parameters. The type of parameter is indicated in the table parameters. Access to the configuration and advanced parameters is protected by a password that prevents unwanted modifications by unauthorised people.
ENG Setting the parameters Category Probes Icon Category Electronic valve Control Configuration Compressor Alarm log Defrost HACCP Alarm RTC MPXPRO Once having accessed the desired level of parameters (F, C or A): 1. pressUPorDOWNuntilreachingthedesiredparameter:whenscrolling,an icon appears on the display representing the category the parameter belongs to (see the table below and the table of parameters); 2. or: press Prg/mute to display the menu of parameter categories.
ENG (Upload) 3.8 Using the remote control (accessory) All the parameters with upload attribute can be uploaded from a Master controller to the Slave controllers in the subnetwork. The upload attribute can only be set for the parameters using the VPM program (Visual Parameter Manager).
ENG Important: “Outputs” area: directly override the digital outputs • parameter H3 is equal to 0 by default on all MPXPRO controllers, to avoid interference within the operating range of the remote control; the values of parameter H3 should be unique for each device. • after 5 minutes without pressing any button, the remote control connection is automatically interrupted, together with any active overrides. To keep the connection and any overrides active, press any button before the 5 minutes elapse.
ENG “E2V” area: override position of the electronic expansion valve In this section, the position of the electronic expansion valve can be controlled manually. As in the other cases, the override function is activated by pressing the button once. When pressing one of the buttons, the display shows the position reached for 3 seconds, then resumes the display of the previous variable, to allow the position of the valve to be changed and then immediately observe the result.
ENG 4. COMMISSIONING 4.1 Configuration 4.2 Recommended initial configuration Once the electrical connections have been completed (see the chapter on Installation) and the power supply has been connected, the operations required for commissioning the controller depend on the type of interface used, however essentially involve setting the so-called initial configuration parameters. See the guided commissioning procedure. MPXPRO features highly configurable inputs and outputs.
ENG Power supply 115- 230 V~ 200 mA~ max L N AUX4 AUX3 ( 1 2 3 4 L N NO NC R1 /P2: Type of probe, group 2 (S4,S5) N L 5 C ( 6 7 8 9 NO C NO NC R2 R3 AUX1 AUX2 ( ( ( ( 10 11 12 13 C NO Used to select the type of temperature probe to be used for inputs S4, S5. Par.
ENG Example: to configure the addresses in a supervisor network made up of three Master controllers that manage 5, 3 and 1 Slave controllers respectively. Solution: assign, for example, the first Master controller serial address H0=31, which also represents the controller address in the supervisor network, the serial address of the second Master controller will be 37 and the third 41. See the following figure. PH: Type of refrigerant IThe type of refrigerant is essential for calculating the superheat.
ENG Ind Seriale indica l’indirizzo seriale con cui lo strumento è visibile a supervisione T.U.I. M.S.N.
ENG 5. BASIC FUNCTIONS Probe positioning and purchase codes 5.1 Probes (analogue inputs) The following probes are recommended by CAREL: • evaporator outlet temperature probe: NTC***HF01; • evaporation pressure probe: – SPKT0013R0: ratiometric -1 to 9.3 bars; – SPKT0053R0: ratiometric -1 to 4.2 bars; – SPKT0033R0: ratiometric -1 to 34.5 bars. – SPKT0053R0: raziometrica -1.0…4.2 bar; – SPKT0013R0: raziometrica -1.0…9.3 bar; – SPKT0043R0: raziometrica 0.0…17.3 bar; – SPKT0033R0: raziometrica 0.0…34.
ENG MPXPRO, inside the showcase or cold room, can use temperature probes to measure: • the air outlet temperature (evaporator outlet); • the defrost temperature (in contact with the evaporator); • the air intake temperature (evaporator inlet). Note: activation of the continuous cycle on the Master means all the dependent Slave observe the compressor management times of the Master controller (only parameter cc on the Master has an effect, while the values set on the Slaves are ignored).
ENG 2 = Delayed external alarm 5.2 Digital inputs The operation of this alarm depends on the setting of parameter A7 (delay time for delayed external alarm): • A7=0: signal only alarm on the display, normal operation of the controller is not affected (default); • A7≠0: alarm similar to the immediate external alarm, activation is delayed by the time set for A7. Introduction MPXPRO manages up to 5 physical digital inputs and one virtual digital input.
ENG features the following analogue outputs: 2 PWM outputs, used as a control signal to manage loads such as modulating evaporator fans or anti-sweat heaters. The first output (PWM1) is connected to phasecutting speed controller (CAREL code MCHRTF****), the second (PWM2) to the solid state relay (SSR) output.
ENG Auxiliary evaporator defrost (not compatible with electronic expansion valve management) Suction and equalizing valve This configuration involves using the auxiliary output as a suction or balancing valve for hot gas defrosts. See paragraph 5.6. A heater can be activated to perform a heater defrost on the main and auxiliary evaporator.
ENG During the day most of the load of the showcase is due to the warm air that enters from the outside and mixes with the cool air inside. Control based on the intake probe, due to high temperature outside the showcase and the mixing of the air, may not manage to reach the set point. Displaying the intake temperature would show a temperature that is too high. Setting a set point that is too low for the intake probe Sr may cause the food to freeze.
ENG with the fans off. See the chapter on Advanced functions. The type of display on user terminal and the remote display during the defrost can be selected by setting parameter d6. Shared network solenoid If using solenoid valves, on Master controllers only the solenoid output (relay 1 - AUX4) can be configured as a network solenoid output.
ENG 1. Heater defrost (d0 = 0, 2, 4): duty cycle 3. Multiplexed hot gas defrost (d0 = 5, 6) : duty cycle The duty cycle refers to the default values of parameters F2 and F3. The valve can be opened to the initial value set for cP1 for a period equal to Pdd. The duty cycle refers to the default values of parameters F2 and F3. The valve can be opened to the initial value set for cP1 for a period equal to Pdd.
ENG The installer is responsible for evaluating the effects on the multiplexed system if one of the following events occurs: • a unit in a multiplexed group performs a local hot gas defrost while the other multiplexed units continue normal control; • a multiplexed group starts a hot gas defrost while one of the units is offline, and then continues control, or is OFF, if the safety procedure is activated (parameter A13).
ENG Staggered defrosts Sd-Sv Par d1S d2S Description Number of daily defrosts (td1) 0 = Disabled Def 0 1 = 24 hours 0 mins 8 = 3 hours 0 mins 2 = 12 hours 0 mins 9 = 2 hours 40 mins 3 = 8 hours 0 mins 10 = 2 hours 24 mins 4 = 6 hours 0 mins 11 = 2 hours 11 mins 5 = 4 hours 48 mins 12 = 2 hours 0 mins 6 = 4 hours 0 mins 13 = 1 hour 0 mins 7 = 3 hours 26 mins 14 = 30 mins Number of daily defrosts (td2) see d1S Min 0 Max 14 t ON FAN UoM - OFF t Sd F0 = 2 F1 F1-Frd t 0 0 14 - ON FAN Tab. 5.
ENG Sd-Sv measurement point of the sensors. The expansion valve must therefore be controlled with extreme precision and a reaction capacity around the superheat set point, which will almost always vary from 3 to 14 K. Set point values outside of this range are quite infrequent and relate to special applications. Parameters SH, tGS, tEu and PPU are display only variables, used to monitor the refrigeration cycle.
ENG 6. ADVANCED FUNCTIONS This chapter examines the categories of parameters already described in the chapter on basic functions, so as to explain the use of the corresponding advanced parameters and control algorithms. In addition, the parameters relating to the compressor are explained, all of which are advanced level parameters.
ENG Calibration (parameters /c4,/c5,/c6,/c7,/cE) Set: Parameters /c4 to /c7 are used to correct the reading made by probes S4 to S7 respectively. Serial probes S8 to S11 do not require calibration. /cE calibrates the saturated evaporation temperature.
ENG Alternatively, the supervisor can directly supply the dewpoint value (Sdp) using the serial probes (see parameter /Fn). The glass temperature probe (Svt) may be connected directly to each controller (see parameter /FM), or estimated. The estimate of the glass temperature probe reading is performed internally when: ambient temperature (SA), outlet temperature (Sm) and intake temperature (Sr) are available, and depends on parameters rHA, rHb and rHS.
ENG 6.5 Control R R Minimum and maximum set point values (parameters r1 and r2) ON ON The minimum and maximum value available for the set point can be defined by parameter. OFF Par. r1 r2 Description Minimum set point Maximum set point Def -50 50 Min -50 r1 Max r2 50 OFF Sm UoM °C/°F °C/°F Sr rd rd2 St Tab. 6.o St2 Fig. 6.e Fig. 6.f ON/OFF (parameter OFF) Key The parameter OFF is used to act on the ON/OFF status of the control.
ENG • r6 (probe for night-time control); • r4 (automatic night-time set point variation). Maximum and minimum temperature monitoring (parameters r5,rt,rH,rL) Control offset with probe error (parameter ro) For the procedure to enable monitoring, see paragraph 3.7. Par. ro Description Control offset with probe error Def 0.0 Min 0.0 Max 20 Par. Description rt Duration of current maximum and minimum temp. monitoring session. rH Maximum temp. acquired in the session rL Minimum temp.
ENG Slave controllers ignore the Master control mode and manage the display as normal (compressor icon on during the cooling request and off when there is no request). Duty setting with shared control status For the description of shared control status, see paragraph 5.1. The activation of the duty setting mode on the Master controller implies that all the related Slaves observe the Master controller compressor management times.
ENG discharge cycle, which needs to be started at short intervals (minutes) and for very brief periods (seconds). 6.7 Defrost The advanced parameters for defrost management include general parameters on the time base, activation delays, synchronization between Master and Slaves, the stages of the defrost such as pump down and dripping, and the advanced defrost functions, such as: • Skip defrost; • Running time; • Sequential stops; • Power defrost. Dripping time after defrost (parameter dd) Par.
ENG The purpose is to stop control and allow natural defrosts only when necessary. Important: for multiplexed hot gas defrosts, the setting is only valid on the Master and the defrost is synchronized across the Master/Slave network. Note: the setting of parameter F3 has no effect. Evaporator fan management depends on parameter F0. Pressure probe alarm management during defrost (parameter d12) During defrost and dripping, so as to avoid false pressure probe error signals, errors are ignored.
ENG 6.8 Evaporator fans See paragraph 5.7. The advanced parameters for the evaporator fans concern the minimum and speed maximum, the selection of the type of motor (inductive or capacitive) and the setting of the start-up time. Par.
ENG 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. The speed of variation and the percentage of opening depend on the PID parameters set.
ENG Phr = 1: fast update enabled (update every 1 s). Sreg Par. Phr Description Enable fast update of the valve parameters to supervisor 0 = fast update disabled Def 0 Min 0 Max 1 UoM - St+rd St+rd/2 St Tab. 6.at t Important: in the event of power failures, parameter Phr will be reset to zero. Fig. 6.
ENG 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).
ENG hour period, then becomes manual reset. P12 = 0 ==> LSA alarm disabled T_EVAP PM1 P13 represents the hysteresis used to deactivate the LSA alarm. P13 = 0 ==> reset always automatic. P10 allows the network solenoid valve to be closed in the event of low superheat (LowSH) and/or low suction temperature alarm (LSA). • P10=1 (default): the unit that signals the LowSH and/or LSA status, as well as closing the local solenoid valve, propagates the request across the local network (LAN).
ENG PL2 PL3 LOP: integration time LOP: alarm delay 0 = alarm disabled 0.0 0 0.0 0 240.0 240 PWM valve modulation period (parameter Po6) s s Par. Po6 Tab. 6.ba PL3 represents the alarm activation delay after exceeding the LOP threshold. When the alarm is activated, the following occur: • message ‘LOP’ shown on the display; • the buzzer is activated. The alarm features automatic reset when the evaporation pressure rises above the threshold PL1.
ENG 7. OPTIONAL CONFIGURATIONS When the set point and type F parameter setting functions are inhibited, neither the set point nor the type F parameters can be changed, while their values can still be displayed. The type C parameters, on the other hand, being password protected, can also be set from the keypad, following the procedure described previously.
ENG Buttons / Associated function • • • • Network defrost Local defrost Network defrost Continuous cycle Enter HACCP • • Enable /Disable aux/light output Continuous cycle • • Mute Enter HACCP Tab. 7.h Active buttons H6 0 1 2 3 4 5 6 7 H6 YES NO NO NO YES NO YES NO YES YES NO NO YES YES NO NO YES YES YES NO NO NO NO NO YES YES YES YES YES YES YES YES 8 9 10 11 12 13 14 15 YES NO YES NO YES NO YES NO YES YES NO NO YES YES NO NO YES YES YES YES NO NO NO NO NO NO NO NO NO NO NO NO Tab. 7.
ENG 8. TABLE OF PARAMETERS Parameter levels: F = frequent, C=configuration (password=22), A=advanced (password=33) Par. Description Pag.
ENG Par. /FG Description Assign auxiliary temperature probe 1 (Saux1) - See /FA Pag.
ENG Par. c7 Description Defrost priority over continuous cycle 0 = no, 1= yes Pag. 47 Def 0 Min 0 Max 1 UoM - Type A 36 0 0 6 - C 48 1 0 1 - A 38 8 0 240 hour C Icon dEF (defrost) d0 Type of defrost dI 0 = heater by temperature 4 = heater by time with temp.
ENG Par. A1 AL Description Alarm thresholds (AL, AH) relative to the set point St or absolute 0 = relative; 1 = absolute Alarm thresholds (AL2, AH2) relative to the set point St2 or absolute 0 = relative; 1 = absolute Low temperature alarm threshold 67 4 -50.0 50.0 °C/°F AH High temperature alarm threshold 67 10 -50.0 50.0 °C/°F F AL2 Low temperature alarm 2 threshold 67 0 -50.0 50.0 °C/°F A AH2 High temperature alarm 2 threshold 67 0 -50.0 50.
ENG Par. P12 Pag. 55 Def 600 Min 0 Max 999 UoM s Type A 55 10.0 0.0 60.0 °C/°F A 67 1 0 1 - A P15 Description LSA: alarm delay 0 = alarm disabled LSA: alarm differential (°C) 0 = reset always automatic Enable valve alarm at end travel (‘blo’) 1 = signal enabled Support saturated temperature for pressure probe error 53 -15.0 -50.0 50.0 °C/°F A PH Type of refrigerant 28-51 3 1 22 - A 53 0.0 0.0 60.
ENG Par.
ENG 9. ALARMS AND SIGNALS 9.1 Signals Note: The signals are messages shown on the display to notify the user of the control procedures in progress (e.g. defrost) or confirm the controls from the keypad or remote control. Code --dEF Ed1 Ed2 rct Icon - rcE - Add ccb ccE dFb dFE On OFF - rES - AcE Act uPL uS_ - • to deactivate the buzzer press Prg/mute; • to cancel an alarm signal with manual reset, once the cause has been resolved, press Prg/mute and UP together for 5 seconds.
ENG In addition, the HACCP alarm menu allows the following operations: • delete an HACCP alarm by pressing Set & 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; • delete the entire memory of HACCP alarms, by pressing Set & UP & DOWN for 5 seconds. This procedure displays the message rES, deletes the entire memory of alarms and reinitialises the monitoring of the HACCP alarms.
ENG 9.5 Alarm parameters Note: • alarms LO(LO2) and HI(HI2) have automatic reset. A0 represents the Assign probe for high and low temperature alarms (parameters AA, AA2) hysteresis between the alarm activation value and deactivation value; • if Prg/mute is pressed when the value measured is above one of the thresholds, the buzzer is immediately muted, while the alarm code and the alarm output, if set, remain active until the value measured is outside of the activation threshold.
ENG Key Hot gas safety procedure for Slave offline (parameter A13) S Measurement probe Ad In a Master/Slave network the multiplexed hot gas defrost is always synchronized by the Master. The safety procedure switches the Slave OFF if it is offline (no longer by the Master across the tLAN). St Set point Htd Par.
ENG 10. TECHNICAL SPECIFICATIONS v Model MX3xxxxHxx MX3xxxx(3,5,6)Hxx Voltage 110-230 V~ , 50/60 Hz 110-230 V~ , 50/60 Hz Power 11.
ENG The MPXPRO range fitted with the standard CAREL NTC probes model NTC015WF00, NTC030HF01 and NTC015HP00 is compliant with standard EN 13485 on thermometers for measuring the air and product temperature for the transport, storage and distribution of chilled, frozen, deep-frozen/quick-frozen food and ice cream. Designation of the instrument: EN13485, air, S, 1, -50T90°C.
ENG Examples application showcase showcase cold room Master Slave Master only no.
ENG Note: MPXPRO - + 0300055EN rel. 1.
CAREL reserves the right to modify or change its products without prior warning CAREL INDUSTRIES - Headquarters Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 - Fax (+39) 049.9716600 e-mail: carel@carel.com - www.carel.com MPXPRO - + 0300055EN rel. 1.
