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1. Cod 030220191 rel 2 0 dated 25 06 01 5 3 Installation Actual installation 1 insert the instrument into the previously created opening 2 fasten the instrument to the panel by sliding it onto the fastening bracket 3 insert the rear connectors of the instrument into the corresponding pre wired connectors 4 close the panel 5 connect the power and configure the operating parameters 3 1 Electrical connections Warning Before performing electrical installation read the instructions and take careful note ofthe diagrams on the following pages cap 16 Remember that all safety devices necessary for correct operation must be fitted in advance To install the controllers the following cables must be pre wired to special connectors 12 way connector power LAN communication channel analogue probes digital inputs 14 way connector relay outputs The IRMPX M models feature RS485 serial connection using a special connector with removable terminals The RS485 connection is made to installations featuring a supervisory system Once the connections have been pre wired the controllers can be easily replaced without having to repeat the pre installation operation described above Installation should be avoided in the following circumstances 1 Relative humidity greater than 85 2 Heavy vibration or shocks 3 Exposure to continuous water sprays 4 Exposure to corrosive or pollutant gases e g sulphur or ammonia fum
2. For easy reference below is a diagram showing the sequence of all the possible phases in the defrost process It should be remembered that some phases e g dripping or post dripping can be activated or inhibited by an appropriate choice of parameters The type of activators being controlled and the type of control depend on the type and configuration of the units selected PHASE normal defrost await dripping post dripping resumption operation dripping normal op ACTIVITY unit s evaporator the defrost compressor and fans are offto temperature temperature defrosted as relay is off evaporator fans allow the control controlled required while the are off in order evaporator to resumed controller to help drainage reach operating awaits the of water after temperature other units to defrost end defrost gt The sequence progresses from left to right Cod 030220191 rel 2 0 dated 25 06 01 41 13 Alarms 13 1 Defective or incorrect operation The units in the MPX range are able to signal most incorrect operations automatically When a malfunction occurs the microprocessor initiates the following actions e the malfunction is signalled on the display by an appropriate alarm code More specifically the display shows the alarm code and the temperature read by the probe alternating in sequence e if more than one alarm occurs at the same time these are signalled in sequence alternating with the temperature e
3. probe 1 100 probe 3 r CPF 0 C 1 F Decimal point enabling 0 No 1 Yes Display on main display and repeater 0 repeater not present 3rd probe reading only on repeater 2 3rd probe reading also on main display virtual probe reading on the main display and defrost probe on En 3rd probe calibration Defrost with probe 3 1 the defrost in temperature ends when the temperature measured by probe 3 is gt the temperature set for parameter dt Defrost probe calibration c 20 20 or oo Short descriptive note about probes with NTC and PTC type thermistors Units in the MPX series are designed to work with Carel NTC temperature probes or probes using thermistors with a negative characteristic NTC stands for Negative Temperature Coefficient This type of thermistor modifies an electrical parameter its own resistance in inverse proportion to any change in temperature that is the resistance falls as the temperature rises and vice versa Other types of thermistor are on the market PTC thermistors are widely available with a resistance of 985 Ohms at 25C PTC stands for Positive Temperature Coefficient by contrast with the NTC these increase their resistance directly as the temperature increases As can be seen in the diagram below the horizontal axis represents the operating range the vertical axis the error the NTC type of probe shows greater accuracy than the PTC version This is
4. Important after the RESET procedure the values of each single parameter will be the default values Any modifications made before the reset procedure will therefore be lost Important note given the delicate nature of this operation the reset procedure must be carried out by specialised personnel In any case the procedure will not damage the instrument but rather simply return it to the state in which it was purchased Thus if the operating parameters have been incorrectly or randomly modified to the point where the controller no longer functions as desired it can be reset to its initial configuration def If following the above described procedure the E symbol remains during power on followed by the letters EB press the button until the letters disappear If the EB error remains and the letters EA appear the instrument must be replaced If on the other hand the letters disappear the controller can continue to be used If the EB error occurs frequently and or tends to persist the controller should be checked as its original specified precision can not be guaranteed Cod 030220191 rel 2 0 dated 25 06 01 18 9 The alarm log All the models in the MPX Series are fitted with an alarm log that records up to until 9 alarm signals The models configured as Master and fitted with RTC also allow the display of the age of each alarm that is the time in hours elapsed between the moment in which the log is consulted and the time the alar
5. duration of charged battery at least 72 hours The devices pass the EMC tests for general and domestic environments En50082 2 immunity En60730 1 do not dispose of the device as ordinary waste To dispose of the device refer to the environmental protection laws in force in your country Note the cables to be connected to the controller must be heat resistant 90 C Cod 030220191 rel 2 0 dated 25 06 01 45 15 2 Temperature Resistance ratios for NTC thermistors The temperature probes with NTC thermistors normally featured on the MPX controllers change resistance as the temperature changes Following is a description of the resistance values corresponding to various temperatures In the case of malfunction or inaccurate control users can check the operation of the probes as follows e witha standard thermometer to determine the temperature measured by the probe e with an ohmmeter measure the resistance at the head of the probe and compare it with the values in the table In view of the variation shown by thermistors three resistance values are given in the table for each temperature e Rstd the typical resistance value at the temperature indicated e Rminis the minimum value e Rmax is the maximum value For the sake of simplicity the values corresponding to only a limited number of temperatures are given Intermediate values can be determined by interpolation Temperature Resistance ratios for the Carel NTC temperatu
6. 0 probe 1 100 probe 3 fs CrE 0 C 1 EIERN 8 pi eng ef fi Ea E Display on main display and repeater 0 repeater not present 1 3rd probe reading only on repeater 2 3rd probe reading also on main display 3 virtual probe reading on the main display and defrost probe on repeater I 3rd probe calibration Defrost with probe 3 1 the defrost in temperature ends when the temperature measured by probe 3 is gt the temperature set for parameter dt Defrost probe calibration Defrost probe present 0 defrost probe and third probe absent 1 defrost probe absent and probe 3 present 2 defrost probe present and probe 3 absent 3 both defrost probe and probe 3 present rd Regulator differential hysteresis F 01 20 eee 20 ri Minimum setallowed tothe user a so m eee ls 2 Maximum set allowed to teus O n as cer 0 Ed alarm enabling defrost interrupted for timeout C 1 flag 0 No 1 Yes Automatic variation of the night time set point curtain switch AA E EI A closed Enable min and max temperature monitoring r Night time variation with third probe 1 night with curtain lowered regulation with probe 3 0 night regulation with the virtual probe Min and max temperature measuring interval Max temperature measured in the interval rt Min temperature measured in the interval rt 2 NOTE the to LAN column in the table identifies
7. 25 06 01 15 7 5 The PSW button and the command buttons 7 5 1 The PSW button enter the system password from the remote control Pressing the PSW button for at least 5 seconds accesses the enter prompt for the system password see using the local keypad and Table of parameters e 22 C parameters e 44 read log e 66 start download procedure To enter a password from the remote control proceed as follows e press PSW for at least 5 seconds e the password entry prompt will appear 00 blinking e set the password using the arrow buttons and on the remote control e press the SEL button to confirm 7 5 2 Direct access to the alarm log A Y Pressing the HISTORY button allows direct access to the controller s alarm log The buttons on the remote control scroll the list of the saved alarms To exit the display of the alarm log press the PRG button Access to the log is inhibited when the instrument is in parameter programming mode Similarly access to the parameter programming mode is inhibited while the log is displayed 7 5 3 Command buttons e Lan_Defr starts a network defrost valid only on units configured as Master e CC ON starts the continuous cycle e CC OFF stops the continuous cycle e AUX ON switcheson the local auxiliary relay e AUX OFF switches off the local auxiliary relay toggles the network auxiliary relay on off 7 6 How to use the remote control 7 6 1 ACCESS WI
8. C parameter menu configuration allows access to the unit configuration In parameter as Master or Slave at the Boot of the unit or immediately after its reset if pressed together with button10 on Master units starts a network defrost on the entire multiplexed island on all units if pressed during the start up of the controller resets the alarm log if pressed for 5 seconds together with buttons 1 and 2 in normal operation resets the controller if pressed alone for 5 seconds during the probe test phase accesses the manual probe calibration procedure see calibration resets the temperature alarms and restarts their monitoring attempts to reload the parameters if there is a configuration read error during the start up of instrument passes from one parameter to the previous decreases the value associated to the parameter if pressed for more than 5 seconds activates a manual defrost if pressed together with button 1 activates deactivates the continuous cycle on start up displays the identification code of the software version loaded on the controller preceded by a graphic symbol if pressed together with button 9 on Master units starts a network defrost on the entire multiplexed island on all units if pressed during the start up of the controller resets the alarm log Note to enable disable the continuous cycle press button 10 and button I and hold for 5 seconds Cod 030220191 r
9. F0 1 Fans OFF with compressor OFF 0 No 1 Yes Active if F0 0 EEE GENER Fans OFF in defrost 0 No 1 Yes Active if F0 0 c o A l FAN relay configuration as AUX relay in this situation the fourth relay can be used as an alarm relay by setting H1 1 or H1 2 0 the aux relay is the fourth relay 1 the aux relay is the fan relay local relay 2 the aux relay the fan relay network relay Fa Fanofrinpost drippng EE 15 min 1 The F parameters are available on the following models IRMPX10000 IRMPX1M000 IRMPX14000 IRMPXM0000 IRMPXMM000 IRMPXMA000 F0 Fans managed by fan controller The fans can be put under the control of the fan controller which manages them according to the temperature measured by the defrost and control probes Alternatively the fans can work constantly with the possibility of switching them off when the compressor is off see parameter F2 during defrost see parameter F3 during a dripping period see parameter dd and for a further post dripping period see parameter F1 Values allowed for this parameter are FO 0 in this case the fans are not subject to fan control but to parameters F2 F3 and Fd FO 1 the fans are subject to fan control see parameter F1 It should be remembered that if a dripping period has been provided for dd not 0 the fans will be stopped in any case Parameter can be transferred via LAN from the Master to its
10. connected Slaves Def F0 0 that is not subject to fan control F1 Absolute Set Point Fan stop temperature operative only when F0 1 The fans are activated when the temperature on the evaporator is less than F1 AO The fans are turned off if the temperature on the evaporator is above the absolute set point Fl Parameter can be transferred via LAN from the Master to its connected Slaves Def F1 5 F2 STOP fans when compressor idle parameter operative only when F0 0 Selects whether the fans should operate continuously except F3 dd and Fd or only when the compressor is working If FO 1 the fans are managed by the fan control and therefore are working or off according to the difference between evaporator and ambient temperatures irrespective of the state of the compressor F2 0 no Fans operate even if compressor is off F2 1 yes Fans are off when the compressor is off Parameter can be transferred via LAN from the Master to its connected Slaves Def F2 1 fans off when compressor off F3 Stop fans during defrost parameter operative only when F0 0 Selects whether the fans should operate during defrost Inactive if the fans are managed by the fan control F3 0 no fans work during defrost F3 1 yes fans do not work during defrost Please remember that during the dripping waiting time in the case of network defrost if featured the fans are always off Parameter can be transferred via LAN from the
11. deviation permitted remains the same The end of the alarm condition occurs when temperature lt set point value of AL value of A0 The end of the alarm condition automatically cancels the corresponding signal The re occurrence of the alarm condition returns the instrument to monitor the condition itself Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def AH 4 Cod 030220191 rel 2 0 dated 25 06 01 33 AL Minimum temperature alarm This parameter allows the low temperature alarm to be selected The value of AL does not indicate the temperature at which the alarm will sound but rather the maximum deviation from the set point i e the requested operating temperature that is permitted The low temperature alarm is given as follows Low temperature alarm lt set point value of AL Note that changing the set point automatically changes the temperature at which the low temperature alarm will be given while the maximum differential permitted AL remains as set The end of the alarm condition occurs when temperature gt set point value of AL value of A0 The end of the alarm condition automatically cancels the corresponding signal The re occurrence of the alarm condition returns the instrument to monitor the condition itself It should be remembered that the low temperature alarm is also used in the continuous cycle see relative section In fa
12. external contact see parameter A4 A5 A8 4 this parameter represents the delay between the defrost start command and its actual start The digital input for defrost see parameter A4 A5 A8 can be used to carry out defrosts in real time Simply connect a timer to the multifunction digital input see parameter A4 A5 The defrost will be activated when the timer contacts close Where several units are connected to the same timer use parameter d5 to delay the various defrosts so as to avoid overloading the power supply Furthermore to avoid unwanted defrosts being commanded by the unit s internal clock parameter dI should be set to 0 on all the units and timed defrosts should be disabled on all units configured as Master and fitted with RTC defrosts only from keypad or from multi function contact Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d5 0 no delay in defrost from the start up of the instrument or the activation of the multifunction input d6 Management of the instrument s display and the repeater during defrost There are 3 options 0 Display not locked out and temperature reading alternates with the symbol dF on both displays 1 Both displays locked at the last value displayed before of the start of the defrost 2 dF fixed on both displays Readings normally return to both displays after the post dripping phase under normal regulation Repeaters belong
13. for some alarms an internal buzzer if fitted emits an audible warning e for these alarms the AUX relay where fitted and if configured as an alarm output will be activated PI Pressing the button silences the buzzer and de energises the relay for 10 min while the alarm code only disappears when the corresponding cause is eliminated The alarm codes are listed in the table below LE active regulation probe error Eo inaetiv_ CS inactive RTC invalid Masters with RTC Bi fate x x 1 5 Slave x not communicating x 1 5 13 2 Description of the signals flashing on the display of the MPX rE FLASHING Regulation probe error e Probe malfunction the probe signal is interrupted or short circuited e Probes not compatible with the instrument EO or El or E2 FLASHING Probe error S1 S2 or S3 respectively e Probe not working because the signal is interrupted or there is a short circuit e Probe not compatible with the unit IA FLASHING Immediate multi function digital input alarm e Check the multi function input and parameters A4 and AS Ad FLASHING Delayed multi function digital input alarm e Check the multi function input and parameters A4 A5 and A7 LO FLASHING Low temperature alarm The probe has measured a temperature further below the set value than the value set for parameter AL e Check parameters AL Ad and AO The alarm will cease as soon as the temperature returns within the set limit
14. i i Active if F0 1 Fans OFF with compressor OFF 0 No 1 Yes Meet eh Re Active if F0 0 Fans OFF in defrost 0 No 1 Yes Ae a Active if FO 0 FAN relay configuration as AUX relay in this situation the fourth relay can be used as an alarm relay by setting H1 1 or H1 2 0 the aux relay is the fourth relay 1 the aux relay is the fan relay local relay 2 the aux relay is the fan relay network relay Fd Fan off in post dripping Tea Serial address only for the network Master BC Ba Kr EEE BEER BE Relay 4 selection 0 auxiliary output 1 alarm relay normally open closed in alarm 2 alarm relay normally closed open in alarm 3 auxiliary relay Master serves the Slaves the action of the Master relay is transmitted via LAN to the Slaves the 4 relay of which is configured with H1 3 Available but not managed Number of Slaves parameter accessible only on the Master units 0 LAN not present SA Slave address in the LAN parameter accessible only on the Slave units 0 LAN not present Configuration parameter of the single unit as Master In 1 or Slave In 0 ea I ho m2 Minute of hour h2 on the current day when a defrost stats Hour of the eighth defrost Minute of hour h8 on the current day when a defrost starts 4 The IN parameters are accessible only when starting the machine by pressing the PRG 8 SEL buttons during the POWER ON phase during which t
15. instrument allows the remote control to interact with the required controller only For the use of the buttons see the section HOW TO USE THE REMOTE CONTROL Buttons used to modify the main parameters direct access buttons All type F parameters and cc and Ad parameters type C are directly accessible from the remote control and their identification code is shown next to the associated button For the use of the buttons see the section HOW TO USE THE REMOTE CONTROL 7 4 2 Buttons for the remote control of the instrument s keypad The PRG A A SEL buttons reproduce the functions of the controller s local keypad on the remote control The main functions are summarised below for convenience SEL displays the value of the selected parameter and accesses the set point A 1 passes from one parameter to the next 2 increases the data on the display when setting the value of the parameters 3 scrolls the alarm log 4 accesses the network auxiliary relay y 1 passes from one parameter to the previous 2 decreases the data on the display when setting the value of the parameters 3 starts a local defrost 4 scrolls the alarm log PRG 1 pressed for 5 sec accesses the type F parameters 2 permanently saves the values of the modified parameters and exits the parameter programming mode 3 silences the buzzer if activated when the controller is not in parameter programming mode Cod 030220191 rel 2 0 dated
16. is full the most recent alarm replaces the oldest event When an alarm event remains in the log for more than 199 hours its age is replaced by the symbol _ NOTE If the instrument loses its current time value this may occur if the rechargeable backup battery fitted in the instruments with RTC discharges the display shows tC and the age of all of the alarm events is replaced by the symbol _ On instruments whose serial number is 23610 the display of the code hE indicates the accidental loss of the alarm log Exiting the display of the log The display of the log is exited either by pressing the button or by not pressing any button for 60 seconds Deleting the log The alarm log can be deleted in three ways e by carrying out a System Reset SEL e on the start up of the controller pressing the and Fh ston together for 5 seconds e reconfiguring the controller from Master to Slave or vice versa Cod 030220191 rel 2 0 dated 25 06 01 19 10 New local network functions 10 1 Network defrost for multiplexed systems The Master controls the defrost in the entire multiplexed island cabinet controlled by the Master cabinets controlled by the Slaves This waits for all units to exit the actual defrost stage before sending the end defrost command to the entire network The Slaves which have exited the actual defrost stage await the end defrost command from the Master before passing to the dripping stage Thi
17. on Fastening the unit The unit is fastened using a compact quick fit plastic fastening bracket This allows the instrument to be mounted on the panel without requiring the use of screws Test in circuit The instruments in the MPX series are the result of the most advanced SMD technology All controls are built using high quality components Quality control includes a rigorous TEST IN CIRCUIT on each single component to ensure that the controller is completely reliable NTC probe The MPX instruments have been designed to be connected to Carel NTC probes as these offer greater precision than other probe types Watchdog A special device that protects the microprocessor of the controller even in the event of strong electromagnetic noise In the case of abnormal conditions the watchdog restores the initial operating status of the unit Immunity against noise The devices conform to EU standards on electromagnetic compatibility C amp 1809001 Approvals The quality and safety of the MPX series are assured by the ISO 9001 design and production certification as well as the CE Mark Cod 030220191 rel 2 0 dated 25 06 01 4 2 Models in the MPX series The models in the MPX series have different codes according to their features The table below lists the various codes and the corresponding options that characterise each model OPTIONS E gt e SES A IRMPX0M000 e IRMPX1A000 IRMPXM0000 IRMPXMM000 IRMPXMA000
18. on Slave units where A8 1 by the opening of the digital input DIN2 on the Master Important note it should be remembered that to guarantee the safety of the unit in the case of serious alarms the unit itself must always be fitted with all the electro mechanical safety devices needed to ensure correct operation A4 AS A8 2 input associated to delayed external alarm The significance connection and operating mode are similar to those already indicated for the parameter A4 1 However when A4 2 it is possible to delay the alarm signal for a period in minutes equivalent to value chosen for A7 After the set delay period the effects on the compressor fans defrost and continuous cycle are the same as when A4 A5 A8 1 A4 A5 A8 3 input associated to defrost activation An external contact can be connected to the multi function input to prepare for or to inhibit defrost When the contact is open defrost is inhibited and when closed defrost is possible If the contact is closed yet no defrost is requested the defrost is obviously not performed If the contact is closed and a defrost is in progress the opening of the digital input will end the current defrost while successive defrosts will be inhibited until the next closing of the same digital contact This function is useful for example with refrigerated cabinets fitted with hot gas defrost With these installations it is necessary to defrost an island at a time so at any one moment some
19. supply 12V alternating current Soft touch keypad The aesthetics of the MPX Series have been designed to blend harmoniously with the new lines of the refrigeration units In the MPX Series special attention has been paid to the ergonomic aspect In this way the modification of parameters and the setting of the more common functions can be done by simply pressing only one button at a time simplifying the use of the instruments New rear connections The rear connectors have been redesigned to make the instrument effectively a plug amp play unit LED Display The LED display shows two and half digits with a range from 55 95 C the temperature value appears with one decimal point which can be omitted via the setting of the relative parameter in the range from 19 9 to 19 9 C In addition depending on the model up to 4 LEDs are available for signalling the active actuators Buzzer All controls come complete with an alarm buzzer upon request LAN The multiplexed Master Slave units can operate both in Stand Alone mode and connected together in a network for the management of multiplexed refrigeration cabinets The unit configured as the Master in this case synchronises the defrost of all the slave cabinets The individual units on start up can be configured either as Master or as Slave The LAN is set up using a half duplex two lead serial interface which allows up to 6 units to be connected together 1 Master 5 Slave A
20. the parameters that can or can not be transferred via LAN from the Master to the Slave Cod 030220191 rel 2 0 dated 25 06 01 49 c0 Compressorstart delay when the instrument istumdON C o 15 min o e el Minimum time between two successive compressor starts C o 15 mn 0 FI men en all u Minimum compressor on time Relay safety 0 compressor always OFF BAR doi Da 100 compressor always ON o s how a ine a lorneosi reame ne fpe f num vas uom pet f Toran ner Defrost types 0 electrical ends by temperature and or for timeout 1 hot gas ends by temperature and or for timeout 2 electrical ends for timeout 3 hot gas ends for timeout Ca TT activated for defrosts without RTC dt Defrost end temperature Defrost end temperature F so 19 ecc 4 o ae d4 Defrost when the instrument starts 0 No 1 Yes c o 1 flag 0 d5__ Defrost delay when instrument starts or from digital input C o 19 min o Main display and repeater during defrost 0 No display block and the temperature alternates with the dF symbols on both displays 1 display is blocked on both displays adk on nibo displays aa a detox eam High temperature exclusion time after defrost and if A4 5 AS 5 LA ELIA ii EAR a or A8 5 alarm exclusion time from the opening of the door d9 Defrost priority over compressor protection
21. used parameters indicated as F parameters in the tables below e configuration parameters C protected by a code or password to prevent unauthorised access to the data The parameters are modifiable as follows e using the keypad on the front panel e via LAN download the parameters from the Master to its connected Slaves e ifthe relative options are available from the RS485 serial network using the Master as a protocol converter the parameters can be read from Supervisory system and written to Slave units which are not physically connected to the RS485 serial communication channel To modify the parameters using the keypad on the front panel proceed as described in the following paragraphs 6 1 Accessing the parameters To access the F parameters PRG press the for more than 5 seconds in the case of an alarm condition silence the buzzer first the display shows the code of the first modifiable parameter C To access the C parameters SEL press the and buttons simultaneously for more than 5 seconds the display shows 00 press either the or M appears button until 22 access password for the type C parameters SEL confirm by pressing the display shows the code of the first modifiable parameter that is C 6 2 Modifying the parameters Modifying parameters After having displayed the first parameter either C or F follow these instructions press either LE or until reach
22. why the NTC probes have been adopted as standard Maximum variation of NTC and PTC temperature probes from theoretically assumed values 25 20 15 10 10 15 20 25 30 n a TET Tolerance of Carel NTC probe Tolerance of PTC probe 985 Ohms at 25 C C Calibration Offset for the ambient probe probe S1 The value assigned to this parameter is added to if positive or subtracted from if negative the temperature transmitted by the probe S1 For example to reduce the temperature displayed by 2 3 degrees C should be set to 2 3 The calibration offset can be varied from 20 to 20 with precision to a tenth of a degree from 19 9 to 19 9 Available on all models Default is 0 0 i e no offset is applied to the probe s reading Cod 030220191 rel 2 0 dated 25 06 01 23 2 Stability of measurement This parameter is used to control the stability with which the temperature is measured Low values assigned to this parameter produce a prompt response by the probe to variations in temperature however the display becomes correspondingly sensitive to changes High values slow down the response causing less fluctuation and a more stable reading Available on all models Default value is 1 3 Probe reading speed Establishes the maximum variation in the measurement of the temperature for each complete analogue input acquisition cycle Small values of this parameter restrict the variation in temperature within the short per
23. 0 No 1 Ye c o 1 fag 0 ee GA _ Mid probe display y____ __ _____ e l_ ame lo Time base for the intervals between defrosts and maximum flag duration dP 0 hours mins 1 mins secs A ALARM e Te Min Mex Uo bet roman New Ad Fan and alarm differen c oi 0 or 20 High temperature alarm indicates the maximum variation from the Pioli Rea set point AH 0 excludes the high temperature alarm pl eet Md Fd SA FA point AL 0 excludes the low temperature alarm at fpi a A oe E LAS Digitlinput no l configuration Wc fo ft 7 ff of _ Compressor aap set Duty Setting from external alarm A4 1 or 2 a5 1 or 2 0 compressor always OFF 100 compressor always ON Detection delay time for the delayed alarm input A4 2 or A5 is 2 en Li As congo or e sum va pn Io I I E NASA Enable propagation via LAN of the second digital input on the iii a Master 1 propagation 0 no propagation e ee remote alarm signals enabled 3 Only the new repeaters with updated FW allow the display of the codes besides the temperature the others if d6 2 display only one fixed temperature Cod 030220191 rel 2 0 dated 25 06 01 50 EHEN PARAMETERS pe Min Man vom per TeLAn nun Fan management 0 fan always ON except in special cases see parameters F2 F3 Fd 1 fans thermostat controlled in accordance with the absolute set point Fl e I dd bd
24. 01 17 8 Re configuring a control with the default parameters Under exceptional conditions high electromagnetic noise levels for example there may be errors when storing data Consequently the unit may not work correctly When the microprocessor identifies an error in the process of storing data one of the following groups of letters will be displayed EA EB E The last symbol will only appear at the start up of the instrument To reset correct operation a special RESET procedure must be followed This procedure is only to be performed in exceptional circumstances as its possible causes are exceptional Thanks to the RESET procedure it is almost always possible to reset correct operation In any case it is useful to investigate the cause of this type of error to be able to prevent it from occurring again Special attention is drawn to the Installation chapter and the Warnings paragraph on page 9 of this manual To reset the controller e disconnect power from the instrument or reset it manually by pressing the PRG amp SEL amp UP buttons together for 5 seconds e During the start up reboot of the instrument press and hold the non DER e the display shows hold the e inthis way the instrument indicates that it is accessing the default configuration parameters until the display shows the decimal point e once the default configuration is reloaded the instrument automatically performs a reboot
25. 0191 rel 2 0 dated 25 06 01 35 A4 A5 A8 5 Door Switch Setting A4 A5 A8 5 controls the switch on the store room door When the switch is opened the compressor and the fans are switched off and the lights are switched on if at least one of the two fan or AUX relays is configured as an auxiliary and is used as a light relay When the door is closed as well as the Multifunction contact the unit resumes the previous operation delaying any temperature alarm by a number of hours equivalent to the value of d8 If the door stays open for a time longer than d8 the display begins to flash and the controller returns to normal operation the same as before the door was opened Specifically e if the controller was in Duty Setting it returns to Duty Setting mode e if the controller was in continuous cycle it returns to continuous cycle and the maximum time for the continuous cycle is extended by the length of time the door was opened e if the controller was in defrost it remains in defrost On re starting the compressor however any protective time constraints selected will be respected see c parameters Note even if the fan is controlled by the fan controller see category F the fans will be shut down ATTENTION the Door Switch algorithm can be activated on units where A8 5 by a command from the supervisory system if the latter exploits the functions supplied by the Master or by the opening of the second digital input DIN2 on
26. MPX User manual EEE QUESTE ISTRUZIONI READ AND SAVE THESE INSTRUCTIONS CAREL Technology amp Evolution LEGGI E CONSERVA gt QUESTE ISTRUZIONI lt READ AND SAVE THESE INSTRUCTIONS We wish to save you time and money We can assure you that a thorough reading of this manual will guarantee correct installation and safe use of the product described CONTENTS General Features anne nass anlsslhisehresuhlneshensnungensnsnnbssnhennebenksensehhhreuhtnen 2 1 Main features of the multiplexed Master Slave unitS suessersossonesnssseesonsnnesnsnssensesnnsnnssnnennesansnnssnnessesnnsnnssnnnsnessnsnnssnnessensnsnnnsnnesnene 3 2 Models in the MPX series cussesssersussnsessessnsnnesnuesnesansnnssnsnnsesnnsnnesnsnsersansnnssnsnssssansnnesnsnsersansnnsnnesnensessansnnesnensersansnnesnensensansnnessensersane 5 3 Installation o oomooo 6 3 1 Electrical Connections z 2 22 84 222 nein EHER II I able iii Hiab ceases 6 4 User interface Buttons and display seessessossnseseessesnnssnsessesnnsnnesnsnssnsersnnsnnssnsnsessonsnnesnensersnnsnnesssnsersansnnesnsnsersansnnesnensersansnnesnensensane 7 4 1 The LED display awT 4 2 Operatingindicati ns a Ri Es E a bid Dari 4 3 Keypad iii a A agile ira 7 5 Configuration of the controllers u suessessorsnnessessesnnssnnesnessesnnnsnnesnensensesnnssnnesnensnsnnssnnessessnsnnssnnsssessnsnnssnnnssessnsnnssnsesss
27. Master to its connected Slaves Def F3 1 evaporator fans off during defrost F4 configuration of the fan relay as an auxiliary relay This parameter allows the fan relay to be configured as an auxiliary local or network allowing the fourth relay to be used as an alarm relay H1 1 or H1 2 If F4 1 or F4 2 the interventions normally performed on the 4th relay are re routed to the fan relay which acts as an auxiliary relay If F4 1 the fan relay can only be managed locally if F4 2 the fan relay may be commanded via LAN for example by pressing the AUX button on a Master unit Parameter can be transferred via LAN from the Master to its connected Slaves Def F4 0 Fd fans off during post dripping The fans after the defrost can be stopped for a further period in minutes defined by the value of Fd This is useful in allowing the evaporator to return to the correct temperature after the defrost thus avoiding forcing hot air into the refrigeration unit In the case of fan controller management Fd does not need to be selected in that the fan controller starts the fans only when the evaporator has reached the correct temperature If fan control is active F0 1 on assigning Fd a value other than zero the fans stay off for a period equal to the value of Fd irrespective of the temperature of the evaporator Parameter can be transferred via LAN from the Master to its connected Slaves Def Fd 1 NOTE Please rememb
28. S Type Min Max UOM Def To LAN New Defrost types 0 electrical ends by temperature and or for timeout 1 hot gas ends by temperature and or for timeout 2 electrical ends for timeout 3 hot gas ends for timeout flag C 0 0 ds Defrost delay when instrument starts or from digital input C 0 199 min 0 Dripping time after defrost F 0 15 mn 2 e High temperature exclusion time after defrost and if A4 5 A5 F 15 hours 1 5 or A8 5 alarm exclusion time from the opening of the door Defrost priority over compressor protection 0 No 1 Yes d Defrost probe display S2 MEA A flag 0 e Third probe display S3 eee i A ME RO O Se pee dd Main display and repeater during defrost C 2 flag 1 0 No display block and the temperature alternates with the dF symbols on both displays 1 display is blocked on both displays 2 dF on both displays 1 dC Time base for the intervals between defrosts and maximum duration dP 0 hours mins 1 mins secs A d0 Type of defrost This parameter sets the type of defrost for units fitted with defrost relays 0 electrical heating element ends at temperature and or for timeout 1 hot gas ends at temperature and or for timeout 2 electrical heating element ends for timeout 3 hot gas ends for timeout Parameter can be transferred via LAN from the Master to its connected Slaves Availabl
29. THOUT USING THE CODE H3 0 The ENABLE button is not required if H3 0 In this case the remote control is always enabled 7 6 2 ACCESS USING THE CODE H3 0 How to set the access code setting the code The controllers are supplied by the manufacturer without the access code To enter the code modify parameter H3 Proceed as follows e press PSW for at least 5 seconds e the controller will show the password entry prompt e enter the password 22 using the arrow buttons on the remote control e confirm by pressing the SEL button e press Y until parameter H3 is displayed on the controller e press SEL to display the value 00 default e use A to set the required code thus must be a value between 01 and 99 e press SEL to confirm the new value and return to the display of parameter H3 e press PRG to exit saving the code Removing the code Repeat the previous procedure assigning the value 00 to H3 In this way the remote control can be used without requiring the access code Cod 030220191 rel 2 0 dated 25 06 01 16 7 6 3 ENABLING THE CONTROLLER FOR RECEIVING COMMANDS FROM THE REMOTE CONTROL e press the ENABLE button to enable the use of the remote control e the instrument will display a two digit code the value of parameter H3 enter the code displayed using the numeric keypad on the remote control The code must be entered correctly without ignoring the zeroes e g if the display on the controller shows 05 t
30. These inputs can be used to enable disable defrost to manage serious alarms that require the immediate e g high pressure or delayed e g low pressure shut down of the unit or for remote control by the Master models and or a supervisory system Cod 030220191 rel 2 0 dated 25 06 01 3 Multifunction output A fourth relay is present to remote the alarm signal or to control the On Off command of accessory devices If the FAN relay is not used to control the fans it can be used as an auxiliary relay in this case the fourth relay can be used as an alarm relay Continuous cycle This function operates the ON routines of the compressor for a time t selected via a specific parameter This is particularly useful when a rapid drop in temperature is required Serial connection Some Master models are fitted with a built in RS 485 serial interface which allows them to be connected to a supervisory system These units can therefore act as a gateway between the supervisory system and the local multiplexed sub network they are part of Dimensions Even the most sophisticated model has standard dimensions The dimensions required on the panel are in fact 71x29 mm Index of protection In the MPX series the O RING inside the front panel and the material used for the keypad ensure the controller IP65 index of protection In addition a flat gasket is supplied as standard in order to increase the index of protection of the panel the instrument is mounted
31. ait before generating a temperature alarm Obviously if during the set delay the temperature conditions return within the set limits that is within the 4 degrees around the set point no alarm is generated NOTE during installation the unit may not reach a temperature within the range of 4 degrees around the set point within the set 120 minute delay and so the temperature alarm will be activated In this case it is suggested to increase the delay by modifying parameter Ad DEFROST PARAMETERS When using the unit to control defrost check the following parameters before starting the unit dl Interval between defrost cycles without RTC or without programmed times Defrost cycles occur periodically depending on the intervals in hours set using the parameter dI When the interval is 0 d1 0 the defrost cycle is never performed unless it is forced via keypad manual defrost via the digital input see parameter A4 or by a command form the Master in a LAN Temperature alarms are inhibited during defrosts If the parameter is set to a value other than the default value the new value will be operative only after the successive defrost Def 8 hours NOTE even when cyclical defrosts are not expected to be used for example with RTC or otherwise dI should not be set to 0 but rather to a value that is higher than the maximum interval between two defrosts This acts a safety function as it ensures at least one defrost i
32. anagementy o Z o 11 3 The password FLASHING PASSWORD This is a protective device that intentionally complicates access to Configuration parameters in order to prevent accidental changes or any that might be made by unauthorised persons Type C parameters are in fact those that alter the controller s configuration Once the configuration parameters have been entered via the use of the password the system also allows the user to alter type F parameters as required The password request flashing 00 appears when the two buttons and I pressed at the same time Access to type C parameters is gained as follows 4 e press or to enter 22 or the correct password confirm using the code of the first modifiable parameter is displayed that is C enter 44 as the password if you wish to access the alarm log enter 66 as the password on a Master unit if you wish to download the parameters from the Master to its Slaves for the configuration of a multiplexed island The following paragraphs describe all the parameters In addition the default value Def that is the value set in the factory will also be indicated Cod 030220191 rel 2 0 dated 25 06 01 22 11 4 parameters for the management of the temperature probes St Temperature setpoint __ e ec roo e __ ao probs bean U EM 1 2 Measurement stability UL edi sl FE B Probereadingrate __nu Virtual probe between probe 1 and probe 3 C 0 100 0 0
33. at least 1 minute The defrost will be performed in any case by the timer which was reset to the value of parameter dI after the previous defrost e Check the electrical connections between the Slave and the LAN e The resetting of the network signals both on the Master and the Slaves occurs automatically as soon as communication is restored between the Master and the Slave d1 d5 FLASHING ON THE MASTER Failed parameter download on unit 1 5 e Check the wiring of the LAN e Press Y for 5s to reset this signal II ID NOTE The alarms on the Slave that generate the alarm n x x 1 5 on the Master are HI LO dA IA and rE Cod 030220191 rel 2 0 dated 25 06 01 43 14 Troubleshooting PROBLEM CAUSE CHECK compressor does not start e power on e compressor LED flashing temperature is outside set limits but no alarm signalled and the buzzer if fitted does not sound the AL or Ad alarm signalled Multi function input without in fact being active the alarm connected to Multi function input is not signalled defrost not activated e contact open e defrost LED off manual defrost not activated and defrost LED flashing compressor delay in progress alarm delay in progress Multi function input generates alarm as power goes on alarm delay operating or parameter programming error defrost cycle too short dP interval between defrosts dI 0 in this case the defrost i
34. ation of the continuous cycle The period in hours for which the compressor remains in operation so as to lower the temperature even below the set point If cc 0 the continuous cycle is not activated Control exits from continuous cycle mode when the period set under parameter cc has elapsed or when the minimum set temperature has been reached set point AL Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 4 hours c6 Alarm cut out after continuous cycle operation The time in hours that the low temperature alarm is no longer monitored after a continuous cycle In practice if the temperature of the refrigerated unit following a continuous cycle falls due to inertia below the minimum temperature set point AL the monitoring of the relative alarm is delayed by the time c6 In theory the persistence of the conditions for a low temperature alarm at the end of a continuous cycle can be detected after a time equal to the sum of c6 hh Ad mm parameter Ad delay in minutes for the signalling of low high temperature alarm Please remember that at the minimum temperature set point AL the continuous cycle is deactivated Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 2 hours Cod 030220191 rel 2 0 dated 25 06 01 29 11 7 d Parameters for defrost management d DEFROST PARAMETER
35. been to provide harmonious expansion that is to offer the user all the functions available on the local keypad as well as some extra options direct access to the parameters the defrost times the alarm log separate management of the network relay and local relay that the local user interface does not have The available functions are accompanied by the following system security features aimed at protecting the user No control configuration parameters can be modified by accident from the remote control Each instrument has its own enabling code for the use of the remote control set by parameter H3 When H3 is assigned a value other than zero during the installation of the instruments the use of the remote control is disabled as default Only the START procedure see below can access the functions of the remote control in this case the value saved for H3 acts as the access code Assigning different H3 values for each instrument allows the same remote control to be used with different controllers The faulty pressing of buttons on the remote control for one minute disables the remote control in which case the START procedure is required before being able to use it again Cod 030220191 rel 2 0 dated 25 06 01 14 7 3 Technical specifications Power supply 2 alkaline batteries 1 5V type UM 4 AAA IEC R03 Case plastic Dimensions 60x160x18mm Storage 25 C 70 C Operating temperature 0 C 50 C Type o
36. cally stop flashing Download failed signal The Master will display the failure of a download to a Slave by showing the signal alternating with the temperature dX where X 1 2 5 that is the value of the parameter LA of the Slave for which the operation of configuration via LAN failed 10 5 Functions available to the RS485 serial supervisory system The MPX Series controls can easily be integrated into large supervisory networks by using the MPX models fitted with a built in RS485 serial interface These models must be configured as the Master the units to integrated must be configured as Slaves with a maximum of 5 for each Master which has the function of interface to the RS485 network of the supervisory system The structure of the software in the MPX provides the supervisory system a number of powerful monitoring and control functions that can be performed on the remote workstation PC e Monitoring of the temperature measured by the three probes on each controller e Monitoring of the status of the digital inputs of each instrument e Monitoring of the alarms on all the controllers including the Slaves which are not directly connected to the RS485 serial communication channel e Reading and modification of the value of the parameters of each controller including the Slaves which are not directly connected to the RS485 serial communication channel Remote control of the controllers actuators light relay for a
37. ct if the temperature falls to the level set for the alarm the continuous cycle is automatically stopped even if the set period of time has not elapsed The stopping of the cycle does not lead to any alarm signal Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def AL 4 Ad Temperature alarm delay Indicates the delay in minutes before a registered deviation is signalled The measuring of a temperature alarm condition leads to the monitoring of the condition itself for a time equal to Ad minutes after which if the condition persists the alarm is signalled If there is an end to the alarm condition within the period Ad no alarm is signalled Setting a delay in signalling temperature alarms can help to avoid false alarms due to interference with the probe or situations lasting only a limited time such as briefly opening the door of a store room Alarm delays do not affect two particular functions defrost and continuous cycle To delay any temperature alarms after these functions parameters d8 for defrost and c6 for continuous cycle must be set Remember that temperature alarms are not generated during defrost and continuous cycle operation Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def Ad 120 120 minutes delay in signalling temperature alarms 11 9 Digital inputs and description of the interface c
38. ctly to the dripping phase See further on network defrost In the case of malfunction of the defrost probe the controller will effect a defrost lasting for a period equivalent to the value set for dP Thus ifthe end defrost set point can not be reached the defrost will be interrupted after a maximum period equivalent to the value in minutes of dP and the Ed error will be displayed ifr3 1 and will persist until a defrost is correctly performed that is ends at the set temperature In the case where probe S3 is used as a defrost probe on a second evaporator the temperature defrost ends when both probes S2 and S3 measure a temperature above or equal to that set in parameter dt Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 4 dP Maximum defrost duration Determines the duration of the defrost in minutes or seconds see parameter dC for timed defrost In the case where during a temperature defrost the end defrost temperature is not reached within the time dP dP represents the maximum duration of the defrost Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 30 minutes d4 Defrost at power ON Activates a defrost when the unit is switched on Possible values are 0 no defrost on start up of the units 1 defrost is effected on start up Commanding a defrost when the unit is s
39. e on all models Def d0 0 electrical defrost temperature end dl Interval between cyclical defrosts The parameter dI manages the so called cyclical defrosts for of each individual Master Slave unit These are controlled by a timer built into the instrument with a set value in hours minutes see parameter dC saved for parameter dI This timer is reset after each attempted defrost including non cyclical ones If the time dI is set to 0 dI 0 no cyclical defrosts are performed Cyclical defrosts may be local that is performed independently on the individual units or network after the time dI on a Master with connected Slaves the Master will manage a network defrost During the defrost the temperature alarms are disabled Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 8 hours 1 Only the new repeaters with updated FW allow the display of the codes besides the temperature the others if d6 2 display only one fixed temperature Cod 030220191 rel 2 0 dated 25 06 01 30 dt End defrost temperature set point This parameter allows the setting of the temperature of the evaporator at which the defrost is ended the temperature of the evaporator is measured by the defrost probe probe 2 If at the start of a defrost d0 0 the temperature measured by the defrost probe is greater than the set end defrost temperature the unit goes dire
40. el 2 0 dated 25 06 01 8 5 Configuration of the controllers The multiplexed units are supplied ready for use They have in fact been programmed using a default configuration so as to satisfy the more common requirements Programming is performed by assigning all the parameters the more frequently required value These values are listed in the table of parameters at the end of the manual If the user wants to maximise the operation of the controllers or has other specific regulation needs the value of the operating parameters can be modified The following notes indicate the default values and the parameters that are more frequently modified before starting to operate the unit 5 1 Configuration of the controllers as Master or Slave SEL e on start up of the unit press the and buttons together for 5 seconds e the display shows the configuration parameter code In SEL e press the button to modify the value 0 Slave unit 1 Master unit SEL e press again to temporarily confirm the new value and move onto the display of the parameter code e press the button to save the new value and exit the Master or Slave configuration procedure the unit will perform a software reboot NOTE the controllers are Master or Slave as default depending on the model and its options all the models featuring RTC with battery backup and or built in RS485 interface are set as Master units 5 2 Selecting the principal operating parameters How to
41. er modifies the set point adding the value of parameter r4 With r4 3 0 pre programmed value the set is increased by 3 degrees from the value used for the open curtain If the auxiliary output is used for the light switch only for H1 0 or H1 3 or F4 1 or F4 2 the lowering of the curtain automatically switches off the light while the raising of the curtain switches it on Cod 030220191 rel 2 0 dated 25 06 01 36 A9 Enable the propagation via the LAN of the Master s second digital input This parameter is accessible only for instruments configured as Master It allows parallel connection to the virtual digital input on the connected Slave units of the Master s second physical digital input DIN2 In this way the second digital input of the Master may be propagated or not to the Slaves 1 DIN2 can be propagated 0 DIN2 can not be propagated For Stand Alone Master units set the value of A9 to 0 Def A9 1 Available on all models if configured as Master Some important warnings For correct management of the functions associated to the digital inputs the values of A4 A5 A8 must be different from one another or else null That is when A4 AS A8 have values other than zero the following must be true A4 A5 A4 A8 A54A8 By default A4 AS A8 are zero and thus the corresponding inputs are not associated to any special functions Note The configuration of a controller s digital inputs is carried out onl
42. er that during the dripping time dd and post dripping time Fd if set to a value other than zero the fans will in any case stay off irrespective of the values assigned to parameters FO F2 and F3 Cod 030220191 rel 2 0 dated 25 06 01 38 11 11 H other settings H OTHER PRE SETTINGS Type Min Max UOM Def To LAN New Serial address only for the network Master Relay 4 selection 0 auxiliary output 1 alarm relay normally open closed in alarm 2 alarm relay normally closed open in alarm 3 auxiliary relay Master serves the Slaves the action of the Master relay is transmitted via LAN to the Slaves the 4 relay of which is configured with H1 3 not managed H0 Serial address Sets an address for the unit for connection to a supervisory or telemaintenance system Also used for serial or network connection Available only on models IRMPX0M000 IRMPX1M000 IRMPXMM000 Def HO 0 Hl Configuration of the fourth relay This parameter allows the fourth relay to be configured as a local or network auxiliary relay or as an alarm relay in this case the parameter Hl also allows the selection of rest as the position of the alarm relay 0 auxiliary output 1 alarm relay normally closed 2 alarm relay normally open 3 auxiliary relay served by the master to the slaves on the master the action of the relay is propagated via the LAN to the slaves where the 4th relay is config
43. erature See parameter dt Probe 3 can therefore be used as a defrost probe on a second evaporator Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 Temperature defrost with probe S2 only one evaporator only d Calibration of the second probe S2 defrost probe The value assigned to this parameter is added to positive value or subtracted from negative value the temperature measured by probe S2 For example to reduce the temperature by 2 3 degrees 8 must be set to 2 3 The offset may range from 20 to 20 with decimal precision between 19 9 and 19 9 Available on all models Def 0 0 no offset to probe reading A Presence of probes S2 and S3 defrost and hot point The value of this parameter tells the instrument if the defrost probe S2 and or cabinet hot point probe S3 are connected or not The possible values for this parameter are the following 0 defrost probe and third probe absent 1 defrost probe absent and probe 3 present 2 defrost probe present and probe 3 absent 3 defrost probe and probe 3 both present Examples D If probe S2 is not present set A 0 or A 1 The instrument will in this way be informed that probe S2 has not been wired during pre installation and will use probe S1 to manage any temperature defrosts The absence of probe S2 will not generate any error signals ID If probe S3 is not present se
44. ers to define the number of start ups per hour and the minimum off period see the Compressor parameters In all MPX refrigeration units the differential is placed to the right of the set point as indicated below DIRECT operation Direct freddo cooling rd attuatore off Set point Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def rd 2 0 rl Minimum set allowed This parameter establishes the minimum value that can be given to the set point Using this parameter prevents the user from setting a set point lower than the value assigned to rl Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 50 r2 Maximum set allowed This parameter establishes the maximum value accepted as a set point Use of this parameter prevents the user from setting a set point greater than the value assigned to r2 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 90 r3 enable signalling of end defrost for timeout enables alarm Ed defrost ended due to timeout 0 alarm disabled 1 alarm enabled Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 r4 set point variation by digital input automatic set point variation by digital input day night set point The parameter r4 ranges fro
45. es saline mist smoke so as to avoid corrosion and oxidisation Strong magnetic and or radio interference therefore installation of the unit near transmitter aerials should be avoided 6 Exposure of controls to direct solar radiation and other climatic elements The following warnings must be heeded when making the connections during the pre installation of the controllers 1 Connecting a power supply of the incorrect voltage can seriously damage the system 2 So as to avoid any possible electro magnetic interference separate as far as possible the signal leads from the probes and the digital inputs from the induction and power leads Do not place power leads and probe leads in the same channels Furthermore avoid placing probe leads in the immediate vicinity of powered components thermo magnetic contacts or others Keep the probe leads as short as possible and avoid sharing their routes with power leads As defrost probes use only guaranteed IP67 sensors place the probes with the bulb in an upright position to assist the drainage of any condensation that may occur Note that thermistor temperature probes NTC or PTC have no polarity and so the terminals may therefore be connected either way If connection to a supervisory network is featured connect the shield of the RS485 channel to the 485 ground on the instrument 4 The secondary side of transformers supplying the units must not be earthed If it is necessary to connect to a trans
46. eters If the probe fault alarm is signalled while the compressor is operating the compressor is switched off without regard to the minimum operating time which may have been selected under parameter c3 and remains off for 15 minutes the COMP LED flashes during this phase After this periodic operation commences according to the operating time set under c4 If the probe fault alarm is signalled while the system is in defrost or in continuous cycle control immediately exits from the current state and duty setting starts To re activate the defrost or continuous cycle operation a back up operation can be performed by modifying parameter A assigning it values 0 or 2 third probe not present If the error disappears the machine returns to normal operation regulation If the error persists even after this operation the correct operation of both probes S1 and S3 must be checked by opening the panel and checking the electrical connections Please keep in mind that in the case of a regulation error on a Master Slave unit neither manual defrosts nor continuous cycle can be performed A Master which shows a regulation error may on the other hand manage the defrosts of all its Slaves network defrost C4 ON compressore compressor OFF OFF 15 min Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 compressor always off in the case of faulty ambient probe Cc dur
47. eypad The buttons present on the front allow the following functions O goes to the next parameter increases the value associated with the parameter activates de activates the auxiliary output resets the remote alarm signal on Master unit resets the remote alarm and failed download signal on the Master if pressed together with button 1 activates the continuous cycle on start up displays the identification code of the software version loaded on the controller preceded by a graphic symbol if pressed for 5 seconds together with buttons 2 and 9 in normal operation resets the controller Cod 030220191 rel 2 0 dated 25 06 01 7 stops the audible alarm for 10 minutes only if fitted if pressed for over 5 seconds accesses the menu of the type F parameters frequent if pressed for more than 5 seconds together with button 9 accesses the menu of the type C parameters configuration accesses the alarm log via password 44 activates the parameter download from the Master units via password 66 if pressed at instrument start up activates the procedure for reloading the controller s default configuration if pressed for 5 seconds together with buttons 1 and 9 in normal operation resets the controller SEL displays and or selects the SET POINT displays the value associated to the selected parameter if pressed for more than 5 seconds together with button 2 accesses the type
48. f transmission Infrared Weight 80 g without batteries 7 4 Description of the keypad The buttons can be divided into the following groups based on their functions e function buttons to activate deactivate the use of the remote control to access the alarm log and for the password entry prompt e pre programmed buttons to modify the main parameters e pre programmed buttons to send direct commands activate aux relay start defrost etc e buttons that repeat the local keypad on the instrument When a button is pressed on the remote control the LED above the decimal point on the main display of the instrument is turned on The LED will stay ON while the button is pressed on the remote control 7 4 1 Function buttons ENABLE accesses the procedure for enabling the use of the remote control History direct access to the alarm logs PSW accesses the password entry prompt ESC 1 exits the parameter programming phase without saving the modifications made this option is not available on the local user interface where the parameter programming phase is exited by timeout 2 ends a session dialogue with an instrument on the remote control NUMERIC KEYPAD sets the enabling code for using the remote control This code is recommended when more than one controller is within the operating range of the remote control as in the case of a series of controls installed in an electrical panel Selecting a different code for each
49. former that has a secondary earth an insulating transformer must be installed in between 5 If more than one control is connected to the same transformer refer to the following wiring diagrams for details of the wiring method bad Cod 030220191 rel 2 0 dated 25 06 01 6 4 User interface Buttons and display Each instrument features 12Vac power supply two and a half digit display temperature display to the tenths LED indicating the output state 4 buttons for programming buzzer according to model PANEL MOUNTED VERSION 4 1 The LED display The display shows temperature in the range 55 to 95 C The temperature measured by the probe is displayed with decimal resolution between 19 9 and 19 9 It is possible to exclude the decimal point by modifying the value of parameter 6 According to the function in progress the display shows one of the following e in normal operation temperature measured by the probe selected by parameter 7 e in parameter selection phase code of the parameter or the value associated to it e in the presence of an alarm condition flashing code of the alarm detected alternated to detected temperature value 4 2 Operating indications On the display are some signal areas see O O O O and in the figure They indicate 4 compressor operating 4b continuous cycle active 5 fan operating 6 fourth relay energised 7 defrost in progress 8 decimal point 4 3 K
50. he 3 hyphens and a code identifying the unit as Master uM or slave u 1 5 address of the slave in the LAN are displayed Cod 030220191 rel 2 0 dated 25 06 01 51 Note Note Note CAREL Technology amp Evolution CAREL srl Via dell Industria 11 35020 Brugine Padova Italy Tel 39 049 9716611 Fax 39 049 9716600 http www carel com e mail carel carel com Agency cod 030220191 rel 2 0 del 25 06 01
51. he digital inputs Cod 030220191 rel 2 0 dated 25 06 01 13 7 Programming by remote control AVAILABLE FOR THE FOLLOWING MODELS IRMPX0A000 IRMPX1A000 IRMPXMA000 7 1 Remote control layout ne asi Remote local interface buttons PRG SEL KEY_UP KEY_DOWN Numeric keypad D Function buttons History PSW ESC ENABLE 7 2 Introduction The remote control for the IRMPX series has been designed to provide the user in the palm of their hand all the functions offered by the MPX family instruments and its local network structure 1 ERA Remote programming of the individual instrument direct access to the parameters and or by entering password 22 on the remote control Remote programming of a multiplex network using the Master unit only starting the download from the remote control Remote setting of the defrost times only for models with RTC and configured as Master Remote setting of the current hour and minute current only for models with RTC and configured as Master Direct access by simply pressing one button to the alarm logs Direct remote access to the local auxiliary relay Direct remote access to the network auxiliary relay using the remote control on the Master unit Remote silencing of the buzzer switching off the corresponding local alarm relay Remote starting of manual defrosts local and or network In implementing the user interface for the MPX remote control the aim has
52. he new value e pressing the ESC button will exit the parameter programming mode without saving the changes 7 6 5 Setting the clock only for Master with RTC Press the hh button to set the hours and the mm button to set the minutes Follow the same procedure as above 7 6 6 MODIFYING THE DEFROST TIMES only for Master with RTC Proceed as follows e press hh for hours mm for minutes e pressa numeric button from 1 to 8 to select the required hours minutes for the defrost being set e the display will show the fixed code hn mn n 1 8 e press the SEL button on the remote control to display the current value of the parameter e press the arrow buttons to modify it e press the SEL button to temporarily confirm the value entered e pressing PRG will permanently save the new value e pressing the ESC button will exit the parameter programming mode without saving the changes When displaying the code associated to the hours or the minutes of any defrost time pressing a button on the remote control numeric keypad associated to a defrost time other than the one being displayed will access the associated defrost time Example assume parameter h8 m8 is displayed that is the hours minutes associated to the eighth defrost time that can be set Pressing button 2 on the numeric keypad will show the code h2 m2 associated to the second defrost time that can be set Cod 030220191 rel 2 0 dated 25 06
53. hes to the LAN and RS485 inputs to access the functions associated with the virtual digital input The following is a description of the functions for each value of A4 A5 A8 A4 A5 A8 0 corresponding input not active The Multifunction digital input is not used and is insensitive to variations closing opening of any externally connected contacts A4 A5 A8 1 input associated to immediate external alarm It is possible to connect the digital input to an external alarm which will request immediate intervention for example a high pressure or compressor temperature alarm In particular the alarm is registered when the contact is opened normal operation being in the closed state Activation of the alarm produces a display signal see alarm Al the sounding of the buzzer if fitted and initiates the following actions compressor works in Duty Setting the ON times are however determined by the parameter A6 and not by the parameter c4 as in the case of a regulation error fan continues to work according to fan parameters F If the external alarm is registered during defrost or a continuous cycle control exits from the procedure Cod 030220191 rel 2 0 dated 25 06 01 34 When the alarm ceases the unit resumes normal temperature control operation WARNING If A8 1 the alarm can be activated by a specific command from the supervisory system if the latter exploits the functions supplied by the MPXs or
54. hird probe as a defrost probe on a second evaporator allows an end defrost when both probes S2 and S3 measure a temperature above that set for parameter dt Def 4 C 5 5 List of parameters to be checked during installation Sn Numberofslaves fortheMaster Jo 5 o SA Address in the LAN for the Slave doj 5 0 Control differential 0 1 Type of defrost ooo Pe po yodo flag 0 Interval between defrosteyeles E E fate i 40 199 CHF 4 ALARM PARAMETERS Ad Temperaturealamdelay Cc 0 19 min 120 FAN PARAMETERS F4 Fanrelayusedforthefansorasauxiiay DD Y CO 0 2 0 HO RS485 serial address only for Master with RS485 ___________ c 0 19 1 HI Configuration of fourth relay auxiliary and or alarm Cc 0 3 0 DEFROST TIMES only for Master with RTC nli Hourofthefirstdeftosttimeabletobest C 0 24 hours 24 mI Minute ofthe first defrost time able to best 0 50 min o e A a in a hs Hourof the eighth defrost ime able be set 0 24 haus I 24 m8 Minute of the eighth defrost time able to be set C 0 min Cod 030220191 rel 2 0 dated 25 06 01 11 6 Programming The microprocessor in the MPX instruments allows the configuration of the functions of the controller according to the application requirements To simplify this operation we have divided the operating parameters into two main groups e frequently
55. ing the parameter whose value needs to be changed SEL press to display its current value increase or decrease its value using the or key until reaching the required value SEL press to temporarily save the new value and display the code of the parameter again e To modify the values of the other parameters repeat all the operations from the modifying the parameters paragraph Saving the new values e Push the PRG button to save the new value s and exit from the parameter modification procedure Cod 030220191 rel 2 0 dated 25 06 01 12 How to exit the procedure How to save the new set values e Press to save the new values and exit the procedure PRG mute Important press to save the new values In the case of power failure before has been pressed all changes will be lost 6 3 Exiting the programming procedure To exit the programming procedure without saving the changes do not press any key for at least 60 seconds TIME OUT The instrument will return to its normal operating mode 6 4 Manual reboot of the controllers PRG The controllers can be manually rebooted at any time without disconnecting the power This is done by pressing the B E and A buttons together and holding them for 5 seconds This procedure may be useful if operating anomalies occur during the configuration installation of the instrument after having changed some important configuration parameters such as the configuration of t
56. ing to older models do not manage the display of symbols for these d6 1 and d6 2 represent the same setting Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d6 1 during defrost the last temperature measured before the start of the defrost remains on the display Cod 030220191 rel 2 0 dated 25 06 01 31 dd Dripping time This parameter makes it possible to shut down the compressor and the evaporator fans after a defrost so as to speed up the dripping from the evaporator The value of the parameter indicates the minutes of shut down If dd 0 no dripping time is provided for with the result that the compressor will be re activated immediately when defrost ends Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def dd 2 minutes d8 Period of alarm cut out after defrost and or open door This indicates the time for which a high temperature alarm will be inhibited at the end of a defrost and or after the door of a store room has been opened in the case of the Multi function input being connected to the door switch see parameter A4 A5 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d8 1 hour of cut out d9 Defrost priority over compressor protection This parameter cancels the compressor protection times cl minimum time between two success
57. iod and thus reduce the unit s susceptibility to erratic impulses Note When modifying both this parameter and the previous operate in a consistent manner that is if 2 is increased 3 should be left unchanged or reduced Vice versa if 2 is decreased Available on all models Default value is 1 4 Virtual probe Defines a fictitious probe which does not exist physically used for normal regulation operations This parameter determines the weighted average used to calculate the value of the virtual regulation probe based on the readings from the ambient probe S1 and probe S3 cabinet hot point The formula is the following Lt yS A xS3 jJ JA virtual probe With a value of 0 the virtual probe coincides with the ambient probe with a value of 100 the virtual probe coincides with probe 3 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 5 Selection of F or C Defines the unit of measurement 0 for working in degrees Celsius 1 for working in degrees Fahrenheit When passing from one unit to another the unit of measure for the set point and the regulator differential are also automatically changed Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 operation in degrees Celsius 6 Decimal point Allows the display of temperature with or withou
58. islands will be enabled for defrost and others inhibited Another use for this function is to inhibit defrost of those units open to the public during shopping hours ATTENTION If A8 3 the defrost of a unit can be enabled disabled by a command from the supervisory system if the latter exploits the functions supplied by the MPXs or by the closing opening of digital input DIN2 on the Master if A9 1 on the Master In this way using only the DIN2 digital contact on the Master the defrost of an entire multiplexed sub network Master connected Slaves can be enabled disabled or only of those units in the sub network where A8 3 NOTE the enabling disabling of defrost by digital contact is local for all units a Master with A4 A5 A8 3 and with its corresponding digital input open cannot defrost locally while it may command the defrosts of its connected Slaves manual cyclical or timed defrost the latter option is only available on models fitted with RTC A4 AS A8 4 input associated to defrost by contact This function allows the defrost to be activated by an external contact If the defrost is activated by an external contact all the type d parameters selected remain valid In particular it may be useful to set dI 0 and inhibit defrosts by RTC on Master units fitted with RTC if manual defrosts or by external contact only are desired This function is useful for performing real time defrosts To do this simply connect a mechanical
59. ive start ups c2 minimum shut down time and c3 minimum operating time at the start of defrost 0 protection times are observed l protection times are not observed defrost has greater priority and takes no account of the compressor timings As an example this is useful for avoiding a delay in the hot gas defrost when the compressor has just stopped and has been restarted with a minimum time between two starts It must be remembered however that in this event the maximum number of compressor starts per hour may not be observed Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d9 0 the defrost follows the compressor times by default these are set to zero D Defrost probe reading This parameter displays the value being read by the defrost probe in the units where it is fitted When the parameter d has been set selected pressing will not allow the value to be changed but the value recorded by the defrost probe can be read Available on all models dA Third probe reading SEL This parameter displays the value read by the defrost probe where fitted Once the parameter dA has been selected pressing does not allow the modification of the value but rather the reading of the temperature measured by the third probe S3 Available on all models dC Time bases Changes the units of measure used to count the times for parameters dl interval between def
60. l contact if the auxiliary relay is used as a light switch ATTENTION The daytime night time set point can be modified by a command from the supervisory system and or by the opening closing of the second digital input on the Master DIN2 if A9 1 on the Master unit on all units where A8 7 Practical example in a multiplexed sub network setting A8 7 on all units simply connect the second digital input of the Master to a switch to be able to manage the light relay and the variation of the set point for all the controllers Summary of the programmable digital inputs list of options A4 AS A8 0 finputmotactive OOOO 1 2 3 4 start defrost Defrost is activated when the contact closes It can be used for real time defrost Simply connect the digital input to a clock with power back up select A4 4 if the chosen input is DIN1 or A5 4 if the chosen input is DIN2 To exclude cyclical defrost automatically activated by the controller set dI 0 5 door switch Contact open door open When the door is open the compressor and the fan are turned off If H1 0 or H1 3 or F4 1 or F4 2 the auxiliary relay is activated to turn the light on If the door stays open for a time longer than d8 the display will begin to flash and the controller will restart normal operation compressor and fan ON if required 6 7 curtain switch Contact closed curtain down If the input is selected as curtain switch when the contact closes the controll
61. larm log Each individual unit features a log with a maximum of 9 alarms each new alarm is recorded in the log where it can be consulted by the user RTC Some models are fitted with RTC battery backup and allow the management of the defrosts at pre set times Up to 8 defrost times can be set during a day 24 hours In the models where RTC is not featured the defrosts can in any case be performed cyclically or manually Third probe Used for measuring the temperature in the hot point of the refrigerated cabinet this can be displayed as a frequent parameter and corresponds to new parameter dA Probe 3 on a stand alone instrument may also be used to manage the defrost on a second evaporator Duty setting A completely new function allows the compressor to run even if the regulation probe is damaged In the case of a short circuit or open circuit probe the compressor is instructed to start on the basis of time intervals minutes selected using the duty setting parameter c4 and to turn OFF every 15 minutes fixed time interval Multifunction input The multiplexed units are fitted with three digital inputs which can be configured by setting parameters A4 A5 and A8 respectively Two of these are physical that is relate to an electrical contact parameters A4 A5 while one is related to the LAN parameter A8 for the Slave models or to the RS 485 serial interface for the Master models fitted with RS 485 serial interface
62. llation of a network of Master and Slaves Available on all models if configured as Master Def Sn 0 Master stand alone Cod 030220191 rel 2 0 dated 25 06 01 39 SA Slave Address This parameter is assigned to the Slave when it is installed in a multiplexed network managed by a Master It is the address of the unit in the network the correct assigning of this number means the Master may communicate correctly with this unit Available on all models if configured as Slave Def SA 0 Slave stand alone Procedure for the installation of a multiplexed network 1 Assign the value of Sn on the Master 2 Assign the value of SA on each Slave Please heed the following warnings e During installation check that in the multiplexed network the values of SA on the various units are different from one another e The value that may be assigned to SA must not be above the value of Sn on the Master if the unit is to be correctly managed by the latter e Ina multiplexed network only one unit can be configured as Master In Installation parameter The value of this parameter configures the unit as Master or Slave this can be accessed by pressing the PRG and SEL buttons together for 5 seconds during the power on phase of the instrument that is when first 3 hyphens and then the identification code of the unit as Master uM or slave u 1 5 address of slave in the LAN are displayed e In 1 unit configured as Maste
63. m 20 to 20 degrees with decimal resolution When configured on the closing of a digital input the set point varies by the amount stored in parameter r4 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 3 0 r5 enable temperature monitoring maximum and minimum Enables the monitoring of the max rH and min rL temperatures in the interval rt max 199h r5 Enable min and max temperature monitoring Temperature alarm monitoring HI and LO 0 None On virtual probe 1 On probe S1 On virtual probe 2 On probe S3 only if 7 1 On virtual probe 3 None On probe S3 4 On probe Sl On probe S3 5 On probe S3 only if 7 1 On probe S3 Monitoring begins when r5 is assigned a value greater than or equal to 1 Cod 030220191 rel 2 0 dated 25 06 01 26 To inhibit monitoring and or reset the values recorded set r5 to 0 After 199 hours the measuring of the max and min temperatures is halted having reached the maximum monitoring time allowed by the instrument Modify r5 to perform monitoring again first set to 0 using the arrows and the SEL button and then to the required value between 1 and 5 again using the arrows and SEL Press PRG to save In the event of blackouts keypad resets or Off commands from digital input monitoring will be reset and then start from zero when the same condition
64. m was recorded Events recorded in the log The following anomalies are saved in the log e the high and low temperature alarms the regulation probe error probe S1 and or probe S3 short circuited and or open the defrost probe error short circuited and or open the signalling of temperature defrost ended due to timeout if enabled as alarm the signalling of loss of communication to the LAN by a networked controller both for Master and Slave units Display of the log The alarm log is accessed using a password in the same way as the configuration parameters the password used is 44 Description of the alarm log If the alarm log is empty the display shows three horizontal dashes otherwise the following information is displayed e the index of the position of the alarm in the log preceded by a graphic symbol displayed in the highest value digit of the display e the alarm code e the time elapsed in hours only for units fitted with RTC and configured as Master from the recording of the event For the Slave units the graphic symbol _ _ is displayed in the place of the time The three displays appear in an alternating cycle The log is scrolled by pressing the arrow buttons o display the older alarms lal more recent alarms The size of the log is 9 events The alarms appear in the log according to the time of their recording At each new alarm event the older alarms are pushed back in the list If the log
65. n entire locked out multiplexed island Remote control of the light relays for each individual MPX unit Network defrost for a multiplexed island by Supervisory units Defrost of any remote unit belonging to a multiplexed island Switching OFF of any MPX by a Supervisory unit Activation of alarm signals and associated operating mode Duty Setting from the Supervisory system Cod 030220191 rel 2 0 dated 25 06 01 21 11 DESCRIPTION OF THE CONFIGURATION PARAMETERS 11 1 Configuration parameters As already mentioned see chapter on how to modify the operating parameters there are two types of parameter parameters used frequently indicated by F in the following tables configuration parameters type C which are protected by a password to prevent unwanted modification 11 2 Parameter categories Besides being divided into TYPES the parameters are grouped into logical categories labelled by letters indicating their function The categories and their identifying letters are given below Flashing00 Does not indicate a category but merely that a password mustbe 00 Does not indicate a category but merely that a password must be E in order to access the ER ee parameters or the alarm log I parameters parameters corresponding to temperature probe A to temperature probe parameters corresponding to temperature control C parameters corresponding to compressor management da parameters corresponding to defrostm
66. nel index of protection Fastening Connections Classification according to protection against shock Number of automatic cycles for each automatic action Disconnection action type PTI of materials used for insulation Environmental pollution Heat and fire resistance category Software class and structure Safety device Display Light signals Audible signal Inputs multifunction digital inputs Relay outputs all Compressor Defrost Fan Aux alarm output RTC rechargeable backup battery Immunity to disturbance electromagnetic compatibility conforming to standards En50081 2 emission Conformity to safety standards for devices in l v Disposal of the product only on models with this function available NTC Carel 55 c 95 c 0 5 C 10 C 70 c 0 C 50 c 12Vac 150mA IP65 with panel mounted and gasket inserted by bracket Molex type crimped connectors should be integrated in class I or II devices 100 000 1B 250V normal D class A watch dog 2 and a half digits compressor continuous cycle defrost fan alarm auxiliary output buzzer optional regulation probe defrost probe cabinet hot point probe two type of action of the device 1C nominal values of the 3a 250Vac relays SPST relay Imax 3A res 2A Vac max 250V SPDT relay Imax 3A res 2A Vac max 250V SPST relay Imax 3A res 2A Vac max 250V SPST relay Imax 3 res 2A Vac max 250V
67. of Slaves in the LAN during boot the display shows uM unit Master e parameters for setting defrost times hx mx x 1 2 8 hours and minutes of defrost times the tens of minutes can be set only if RTC is present e parameters hh and mm current hour and minute only if RTC is present For the Slaves e parameter SA Slave address address of the slave in the LAN during machine boot if configured as Slave uN is displayed where N SA e g ul if the address of the Slave in the LAN is 1 SA 1 5 4 Important parameters for all units Master Slave As indicated the instruments are factory programmed to measure both the high and the low temperature alarm The alarms set off the internal buzzer if fitted and show a code on the display HI for the high temperature and LO for the low temperature The conditions that generate a temperature alarm are e high temperature alarm the temperature measured by the ambient probe is above the set point by a value greater than AH ambient temperature gt set point AH e low temperature alarm the temperature measured by the ambient probe is below the set point by a value greater than AL ambient temperature lt set point AL The default settings are AL 4 and AH 4 and any signalling of the alarm is delayed by 120 minutes Ad 120 The value associated to Ad in fact indicates the number of minutes of delay that the controller must w
68. olling the evaporator fans i 38 11 11 Other settings lei e ne INTRA ri 12 Operating states of the units 12 1 Sequence of the main phases si nrin Ab inni canililno 13 VAIS ER ERA NERE EIN SIRIO RICA PE SRO AAA AAA AAA RE IRNERIO SERIE OE 13 1 Defective or 1ncorrect Oper ati On verses cicca inne ee aaa lana 42 13 2 Description of the signals flashing on the display of the MPX nennen nnnnnennon 42 14 Troubleshooting 15 Technical specifications s rsursonesnesnessersorsnnesnensersonsnnennensersonsnnennensersonsnnennensersonsnnesnensessansnnesnensersansnnesnensersansnnesnensensansnnesnensensane 45 1521 Vrechnieal chatacteristies as a e iu Sii calli a Re na ne et chen ed esse gern 45 15 2 Temperature Resistance ratios for NTC thermistors nono no nono nonn nn nonc on nac nono non n nono non onn cn rare aan nr aran nanccn no 46 15 3 View ofthe TASTE A eee SITI Ae aa 47 16 WIRING DIAGRAMS AAA O O 48 16 1 MPX Contact rear Wii iaia riada 48 17 General Features The multiplexed Master Slave units belong to the MPX Series for refrigeration made up of microprocessor controlled electronic controllers with LED display specifically designed for the management of refrigeration units In this particular case the refrigeration units may be stand alone type or grouped together as multiplexed cabinets 1 Main features of the multiplexed Master Slave units Power
69. ommands for the supervisor A4 AS AS Configuration of the Multi function digital inputs The instruments in the MPX Series are fitted with three digital inputs which can be configured using parameters A4 A5 A8 Parameters A4 and A5 configure the digital inputs DIN1 and DIN2 which are wired during pre installation All units both Master and Slave can also manage using an electrical analogy a third digital input known as the virtual input This input in the unit Slave is physically supported by the terminals in the LAN while for the units configured as Masters and fitted with RS 485 serial connection it is supported by the signal terminals and of the RS485 In the case of a multiplexed network Master Slave the virtual digital inputs for all the instruments are wired in parallel The virtual inputs of the Slave are served by the Master and that of the Master is served by the supervisory system The physical input DIN2 of the Master may also be wired in parallel to the virtual inputs by setting on the Master unit the parameter A9 In this case the closing opening of the physical contact DIN2 on the Master will be propagated to the virtual digital inputs on all the connected Slave units as by default happens for the Master s virtual digital input The parameter A8 configures the virtual digital input of a MPX Note that this is used only as an analogy do not physically connect external switc
70. one alarm relay that of the Master in the multiplexed sub network The nX signal on the Master may be inhibited for one minute by pressing J for 1 second 10 3 The network auxiliary relay By default the fourth relay of an MPX unit is configured as the network auxiliary In a multiplexed network pressing the L Jbutton on the Master propagates the action of the Master s auxiliary relay to all the Slaves with a relay fan relay or fourth relay that is configured as an auxiliary F4 2 or Hl 3 The action of the Master s auxiliary relay is also propagated to the Slaves by a variation closing opening of a contact to the Master s digital inputs see configuring the digital inputs parameters A4 A5 A8 EXAMPLE in the case of the Curtain Switch simply connect a switch to the second digital input of the Master DIN2 so as to be able to also turn on off the lights on the refrigerated cabinets controlled by the Slave units the Slaves must be set as F4 2 or H1 3 10 4 Configuring a network by downloading the parameters from the Master unit A Master Slave network is used to control the temperature of refrigerated cabinets with similar product types As a consequence the Master and the Slaves must have the same values for the parameters such as the regulation set point the end defrost timeout the end defrost temperature the interval between defrosts the dripping time etc All the instruments in the MPX Series featu
71. or electronic timer to the digital input When the contact of the timer switches from open to closed the request for defrost is activated As mentioned in the description of parameter d5 more than one unit can be connected to the same timer By selecting a different value of d5 for each unit simultaneous defrosts can be avoided NOTE in the case of a Master with connected Slaves on the closing of its digital contact a network defrost will be performed even when a local defrost cannot be performed ATTENTION If A8 4 on Master unit with connected Slaves a network defrost can be performed by a command from the supervisory system if the latter exploits the functions supplied by the Master If A8 4 on one Slave a defrost can be performed by e acommand from the supervisory system if the latter exploits the functions supplied by the Master that the Slave is connected to and if the Master is fitted with built in RS485 interface e the closing of the digital input DIN2 of the Master if on the Master A9 1 t l timer defrost dP unit 1 d defrost PT ar unit 2 d defrost richiesta sbrinamento defrost request EXPLANATION t impulse from timer to start defrost the minimum duration must be 0 5 seconds dP 1 maximum duration of defrost unit 1 d5 2 external contact s defrost delay for unit 2 This must be grater than dP 1 if two units are not to be defrosted at the same time Similarly for d5 3 and dP 3 Cod 03022
72. or multiplexed systemS ii 20 10 2 Remotesalarm signal s c co ccccececcsccecctesscs ccuensecescodesetensde ss ses i iiiki E cacedeeutecescendesatcnsdesddsas secsbcentecukendese easdn seduce ieri 20 103 Thenetwork auxuillary lla Vin cloni 2002 ai Iata 20 10 4 Configuring a network by downloading the parameters from the Master unit ii 20 10 5 Functions available to the RS485 serial supervisory System iii 21 11 DESCRIPTION OF THE CONFIGURATION PARAMETERS uusussssnssssnsnssnssssnsnsnnsnssssnsnssnsnssnsnsnnsnnnssnsnssnsnssnsnsnnsnnsnsnsnnne 22 11 1 Configuration parameters 11 2 Parameter categories A A RAT RT ii 11 4 parameters for the management of the temperature probes nono nnnn nono nnnonn nan co nono nonnnnnnnnnos 23 11 5 r parameters for temperature regulation cono nnnonnnnnn non ron no nn nn nn none nn non no nn nana nn neon non anar nana onnonnannncnnos 25 11 6 c parameters for compressor management nono nonn none none nn RR estet tSt RR ESSE RR RR RRA DRNA RR RR RR RR R RR ENESE SEn enteses ennert seeen 27 11 7 d Parameters for defrost management sts ssreorsesesteeeestsses ere 30 11 8 A parameters for alarm control RE RAI IAA PRETE 33 11 9 Digital inputs and description of the interface commands for the supervisor iii 34 11 10 F parameters for contr
73. quest _1 Viet cite n OFF compressore compressor Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def c3 0 no minimum ON time is set Cod 030220191 rel 2 0 dated 25 06 01 28 c4 Duty setting or safety relay If the regulation error alarm occurs that is probes S1 and or S3 are short circuited or disconnected this parameter ensures the operation of the compressor until of the elimination of the fault As the compressor is unable to function based on the temperature because of the faulty probe it is activated cyclically with an operating time ON time in minutes equivalent to the value assigned to c4 and a fixed OFF time of 15 minutes There are two values of c4 that produce special functions If c4 0 the compressor will remain permanently OFF in the case of a defective probe if c4 100 the compressor will remain permanently ON the 15 minute off time being cancelled The following particular situations should also be considered if the regulation error occurs while the compressor is off it is turned on respecting the delays set by parameters cl and c2 and remains on for a time equal to c4 This is called duty setting operation which is signalled by the COMP LED that flashes during compressor off period and stays on when the compressor is in operation The fans continue to operate according to their respective parameters see F param
74. r e In 0 unit configured as Slave Available on all models The default for this parameter depends on the model of the instrument see the second row of the following table for the default values of the various models IRMPX00000 IRMPX0M000 IRMPXOA000 IRMPX10000 IRMPX1M000 IRMPX1A000 IRMPXM0000 IRMPXMM000 IRMPXMA000 IRMPXMB000 PA ASA A O A dale NOTE in all models configured as Slave access is denied even by password to the following parameters H0 Sn Ar A9 the clock and the parameters for setting the defrost times units configured as Slaves do not manage these Min Def bh Currenthour TE Yo mm Currentmimute 0 po h1 Hourofthefirstdeoto mi Minute of hour h1 on the current day when a defrost starts C 0 22051 0 E a 23 hours Jo poso i ea gt pi 23 hours 24 50 10min o J 23 hours 24 J EOS fessi EE ES E O Be Huan JE 23 hours 24 pl AE ES so iomin 0 Minute of hour h8 on the current day when a defrost starts The RTC parameters are present on models IRMPXM0000 IRMPXMM000 IRMPXMA000 IRMPXMB000 3 9 3 0 3 0 10 min 3 50 hh mm current hour and minute These can be set as for the F type parameters Setting the current hour and minute automatically cancels the signalling of an RTC error tC hX mX are respectively the hour and the minute set for the X th defros
75. r always remains off A6 100 the compressor always remains on The fans continue to be controlled according to the selected parameters see category F Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def A6 0 compressor off in the case of external alarm AT Delay in signalling of external alarm multi function input Sets the delay in minutes in signalling the external alarm when A4 A5 A8 2 Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def A7 0 Ar Enable Master for the signalling of alarms on remote Slave units The Master unit if Ar 1 can indicate the presence in its own sub network of a Slave in alarm If an alarm is activated on one Slave the Master displays the signal nX alternating with the display of the temperature where X is the address of the Slave in alarm X 1 5 If on the Master relay 4 is configured as an alarm relay H1 1 or Hl 2 the alarm relay of the Master is also activated Available on all models if configured as Master Def 1 Monitoring enabled Cod 030220191 rel 2 0 dated 25 06 01 37 11 10 F parameters for controlling the evaporator fans C Fan management 0 fan always ON except in special cases see parameters F2 F3 Fd 1 fans thermostat controlled in accordance with the absolute set point F1 Fan start absolute set point Active if
76. r starts This sets the minimum time in minutes that must elapse between two starts of the compressor independently of the temperature and of the set point By setting this parameter it is possible to restrict the number of starts per hour For example if the greatest number of starts permitted in an hour is 10 simply set c1 6 ATTI RA richiesta inserimento I Parameter can be transferred via LAN from the Master to its RE vi VIESTE CRA TE oF connected Slaves i e Available on all models Def c1 0 no minimum time is set between two start ups compressore compressor C1 c2 Minimum compressor OFF time This sets the minimum time in minutes for which the compressor may remain inactive The compressor will not be started if the minimum time selected has not elapsed c2 This parameter is useful for equalising pressure after switch off in the case of installations with hermetic and capillary compressors richiesta inserimento E insertion request J i Be Parameter can be transferred via LAN from the Master to its connected ON Slaves Available on all models OFF Def c2 0 no minimum OFF time is set compressore compressor c3 Minimum compressor ON time This sets the shortest period for which the compressor may operate The compressor will not be switched off if it has not been on for a time equivalent to the minimum selected m ot 2 RA VS SS ae richiesta inserimento I I insertion re
77. re probe Temperature Rmin_________ Rstd Rmx Cod 030220191 rel 2 0 dated 25 06 01 46 15 3 View of the instrument aa 71 x 29mm SN 8 ru un TT Dimensions of the MPX in mm A B 34 C 66 D 75 Cod 030220191 rel 2 0 dated 25 06 01 47 16 WIRING DIAGRAMS Master Slave connection wiring diagram Insulating Transformer transformer pLAN Example of wiring for serial connection of the instruments Main mains power supply TRF transformer INS TRF insulating transformer earth SER multiple connection to the controller system 16 1 MPX contact rear view Label of connections for the IRMPX10000 model slave with 4 relays CIERNE ELELELE Y dl CMP FAN AUX E a 0001XdWdl 3 EFRERFT Winlogon ni _ A a e CMP FAN UX s 1 mm mm y RIP LLAN L RS 485 ve O00WWNXdWdI A0S2 Cod 030220191 rel 2 0 dated 25 06 01 48 17 Summary of parameters Pa PASSWORD PARAMETERS c 00 o Inf rograssworp tg DOWNLOADPASSWORD__________ e o 190 se I St temperature serpme DD a m ec oo 1C Regulation probe calibration FE 20 20 eee Poo 2 rasen nam te SS I a Probe reading rate FERA Be EL ll
78. re the possibility of manually configuring just the Master unit and then transferring the Master s configuration via network to the corresponding Slave units The following is a list of the parameters that can be transferred via LAN by the Master to the Slaves TABLE OF DOWNLOADABLE PARAMETERS Minimum time between two successive compressor starts Cod 030220191 rel 2 0 dated 25 06 01 20 CODE CAUSE Minimum compressor off time Minimum compressor on time c4 Compressor on time in Duty Setting mode Duration of continuous cycle cc Exclusion time for low temperature alarm after continuous cycle dO Type of defrost Interval between defrosts dt End defrost temperature dP Maximum duration of one defrost Defrost on instrument start up YES NO d4 Delay defrost on instrument start up d6 No temperature display during defrost dd Dripping time Alarm exclusion time after defrost Defrost priority over compressor protection Fan set point Fan set point How to perform a download To carry out a download on the unit configured as Master use the same procedure as for accessing the configuration parameters and enter the password 66 The lowest value digit on display of the Master will flash until the end of the download to all the Slave units Each Slave after having been configured by the Master will perform an auto reboot At the end of the download the lowest value digit on the Master will automati
79. rost and dP duration of defrost 0 dI is expressed in hours and dP in minutes 1 dI is expressed in minutes and dP in seconds The parameter dC 1 can be useful for quickly testing the defrost operation with reduced times It is however considered that if defrost requires the activation of the compressor hot gas defrost and the parameter d9 1 there may be a risk of damaging the compressor by too many starts at short intervals The defrost cycle thus becomes the condensate discharge cycle which needs to be started at short intervals minutes and for very brief periods seconds Contact your Carel agent for further information Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def dC 0 that is defrost interval in hours and dP maximum defrost duration in minutes Cod 030220191 rel 2 0 dated 25 06 01 32 11 8 A parameters for alarm control Areas LAN AO Fan and aterm iteremial ____ _ 91 120 CE 20 High temperature alarm indicates the maximum variation from 0 199 C F the set point AH 0 excludes the high temperature alarm AL Low temperature alarm indicates the maximum variation from F 199 C F 4 the set point AL 0 excludes the low temperature alarm Digital input no 1 configuration 0 RS Dal no on pepe st pe Compressor step set Duty Setting from external alarm 100 A4 1 or 2 a5 1 or 2 0 compressor alwa
80. s see parameter AL Cod 030220191 rel 2 0 dated 25 06 01 42 HI FLASHING High temperature alarm The probe has measured a temperature further above the set value than the value set for parameter AH e Check parameters AH Ad and AO e The alarm will cease as soon as the temperature returns within the set limits see parameter AH EA EB DISPLAYED DURING OPERATION OR WHEN SWITCHING ON Data acquisition error e See the section on Procedure for re configuring the controller with the default parameters Ed FLASHING The last defrost has stopped due to the expiry of the maximum time rather than the end defrost set temperature being reached e Check parameters dt dP and d4 e Check the effectiveness of the defrost e Ifthe next defrost ends due to temperature the signal will automatically disappear dF FLASHING Defrost in progress e This is not an alarm signal but rather an indication that the unit is carrying out a defrost e Appears only if parameter d6 0 or d6 2 TC FLASHING RTC error on the units fitted with RTC and configured as Master e Set the hour and minutes on the user interface n1 n5 FLASHING ON THE MASTER Slave 1 5 in local alarm e Press AUX to reset the alarm ul u5 FLASHING ON MASTER Loss of communication with Slave 1 5 for around 3 minutes e Check LAN electrical connections MA FLASHING ON SLAVE Loss of communication between the Slave and the Master for
81. s as described above are true Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def r5 0 temperature monitoring not enabled r6 night time regulation with third probe if regulation is performed using the night time set point regulation can be selected using either the virtual probe or the third probe only cabinet hot point r6 1 night time regulation using probe S3 r6 0 night time regulation using the virtual probe Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 regulation using virtual probe rt temperature monitoring time once temperature monitoring has been enabled the time in hours from the start ofthe monitoring period is saved for this parameter Available on all models Def rH maximum temperature measured in time rt once temperature monitoring has been enabled the maximum temperature measured from the start of the monitoring period is saved for this parameter Available on all models Def rL minimum temperature measured in time rt once temperature monitoring has been enabled the minimum temperature measured from the start of the monitoring period is saved for this parameter Available on all models Def 11 6 c parameters for compressor management c JU ed Compressor start delay when the a n 0 15 min 0 c1 Minim
82. s not activated no defrost time set compressor protection delays in progress parameters c0 cl and c2 check Ad check connection of input and whether it is off in normal operation see whether A4 A5 1 or A4 A5 2 if A4 A5 1 check status of digital input if A4 A5 2 check A7 parameter dP and dI parameter d9 select d9 1 high temperature alarm given after defrost alarm delay after defrost too short or alarm parameter d8 and AH and Ad threshold too low fans do not start fan power on compressor LED flashing fan LED flashing after changing a value or programming the controller continues to work with old values e compressor and fan delay selected e if FO 1 fans under fan control e evaporator is warm temperature can be read by selecting parameter d dripping is in progress a post dripping delay is in progress if FO 0 F2 1 and compressor off dripping is in progress post dripping shut down unit has not yet updated the new values the parameters have not been satisfactorily saved by check c0 parameters FO Fl Fd dd parameters FO F2 dd and Fd switch off the controller or program parameters again correctly continuous cycle is not activated press before Cod 030220191 rel 2 0 dated 25 06 01 44 15 Technical specifications 15 1 Technical characteristics Probe type Operating field Precision Storage Operating conditions Power supply Power consumption Front pa
83. s performed every dI hours even when due to unforeseen anomalies the programmed defrosts would normally not be performed This will not affect the normal performance of the programmed defrosts as the timer associated to the value of dI will be restarted at the end of each defrost dP Maximum defrost time The parameter dP determines the maximum duration of the defrost cycle in minutes This parameter represents the effective duration of the defrost when d0 2 or d0 3 If this parameter is modified while a defrost is in progress the new setting will not influence the duration of the current defrost but rather that of the successive defrost Def 30 minutes d0 Type of defrost Establishes the type of defrost 0 defrost by electrical heating element 1 defrost by hot gas 2 timed defrost by electrical heating element 3 timed defrost by hot gas Def d0 0 electrical heater defrost by temperature Cod 030220191 rel 2 0 dated 25 06 01 10 dt End defrost temperature This parameter allows the end defrost temperature as measured on the evaporator to be set In any case the maximum defrost time is equal to the value in minutes set for parameter dP When the temperature measured by the defrost end probe is higher than the defrost end temperature set by the user the defrost cycle will not be performed that is only the following dripping and if required post dripping phases will take place The use of the t
84. s waiting status is identified on the display by the flashing of the def and fan LEDs Once they receive the end defrost command the Slaves move onto the dripping phase The actual defrost stage for each individual unit and for the network as a whole end in any case due to timeout The default end defrost timeout is 30 minutes The network defrost which is set to occur cyclically every 8 hours may also be started manually pressing the DEF SEL buttons for 5 seconds or at set times if the RTC is present The Master may control and manage the network defrost cyclically manually by time or via its digital contact even in operating conditions under which it cannot perform a local defrost 10 2 Remote alarm signals The unit configured as the Master in a multiplexed network may signal remote alarms present in the slave units if this is enabled by setting the relative configuration parameter parameter Ar 1 All Master units are set to do this as default If the Master detects that a Slave unit is in alarm status regulation probe error defrost probe error high low temperature error the display shows the signal nX alternating with the display of the temperature where X 1 2 3 5 the sub network address of the Slave in question Following this event the alarm relay of the Master is activated if configured to do so parameter H1 1 or parameter Hl 2 This allows the use of just
85. sansnnssnsnssssansnnsnne 5 1 Configuration of the controllers as Master or Slave iii 5 2 Selecting the principal operating parameters iii 5 3 Other important parameters i 5 4 Important parameters for all units Master Slave 5 5 List of parameters to be checked during installation 6 AAA NS 12 6 1 AICCESSINEITHEIPALAMNEIGIS o EEE nee 12 6 2 Modifying the parameters ico ari ORE TITANI 12 6 3 Exiting the programming procedure ii 13 6 4 Manual reboot of the Controllers nn tcs 13 7 Programming by remote control cusseessessersorsnnesnensersorsnnennensersunsnnesnensersnnsnnennennessesnnnsnnennensennnssnnenssensessnssnnensnensesnnnsnnessessensarsnnennene 14 7 1 Remote control layout i 72 Introduction 7 3 Technical specifications 7 4 Description of the keypad 7 5 The PSW button and the command buttons i 16 7 6 How to use the Temote contiol are e a 8 Re configuringa control with the default parameters 9 TUG alarm NOG o 55s0s000d0sesnosensedsoosesedecseosesesvsnousnovesecescsesseusts0os sosvseodeaseseooseseseosoessoes desusnedes soceussusesocdeossanedsesesssdees deossusesecvensdsnebsesasossee 10 New local network functionSs cusseessersorsonesnessersorsnnesnensersarsnnesnensersonsnnesnensensersorsnnesnensersansnnesnersensonsnnesnensersonsnnesnensersonsnnesnensennane 20 10 1 Network defrost f
86. set the ambient set point The instrument is configured with a default set point of 10 C If this is not compatible with the required application it can be modified as follows SEL e press the button for one second to display the value of the set point the previously set value will flash e increase or decrease the value of the set point using the E and or buttons until the desired value is displayed SEL e press the button again to confirm the new value How to set the differential regulator hysteresis The instrument is programmed with a differential of 2 degrees as default If this is not compatible with the required application it can be modified as follows PRG press the 5 button for more than 5 seconds in case of alarm first silence the buzzer if fitted e the display shows the code of the first modifiable parameter C 4 e press the button or button until the code rd is displayed SEL e press to display the associated value e increase or decrease the value using the and or button until the desired value is displayed SEL e press again to temporarily confirm the new value and move onto the display of the parameter code e press the button to save the new value and exit the parameter modification procedure Cod 030220191 rel 2 0 dated 25 06 01 9 5 3 Other important parameters LAN configuration parameters For the Master e parameter Sn Slave number from 1 to 5 number
87. t A 0 or A 2 this will avoid the signalling of the rE regulation error due to the detected disconnection of probe S3 that is an error due to the malfunctioning of one of the two probes which together determine the value of the virtual probe Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 3 probes S2 and S3 both present 11 5 r parameters for temperature regulation Toe r r r Ed alarm enabling defrost interrupted for timeout 0 No 1 Yes r r r r Enable min and max temperature monitoring Night time variation with third probe 1 night with curtain lowered regulation with probe 3 0 night regulation with the virtual probe IH Max temperature measured in the interval rt Min temperature measured in the interval rt 4 Automatic variation of the night time set point curtain switch closed 1 3 5 6 H L Cod 030220191 rel 2 0 dated 25 06 01 25 rd Regulation delta Sets the value of the differential or hysteresis used in regulating the temperature A narrow differential i e one with a low number ensures a temperature that differs little from the set point or optimal operating temperature but one that requires the frequent switching on and off of the main operating components normally the compressor It is possible to extend the life of the compressor by appropriately setting the paramet
88. t If a defrost is required for example at 3 30 in the morning set hX 3 and mX 30 X 1 2 8 To inhibit defrost set hX 24 The parameter mX can only be modified in steps of 10 min Cod 030220191 rel 2 0 dated 25 06 01 40 12 Operating states of the units As indicated above the display LEDs can be in three states e off when the function indicated or the actuator is not operative e on when the function indicated or the actuator is operative e flashing when the function is held up by an alarm situation by a delay or by a particular status of the Multifunction input There are however various specific operating states not directly indicated by the displays This can lead to erroneous interpretation of the unit s operating state For convenience the status of the display in such situations is shown below SPECIFIC STATE COMP LED FAN LED DEF LED C CYCLE LED ener dei TT e e aid ders NE I VERA er Defrost requested nn N DTO in progress A EN NT 1 Only if the defrost requested is inhibited by digital contact and if the request for defrost comes from the digital input the defrost is performed as soon as the enabling digital contact is closed signifies that the LED may be on off or flashing depending on the other parameters and ambient factors temperature operating set differential etc The general remarks made above on the status of the LEDs should be kept in mind 12 1 Sequence of the main phases
89. t tenths of degrees ranging from 19 9 to 19 9 0 data displayed with tenths of degrees 1 data displayed without tenths of degrees Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 decimal point enabled 7 Reading on main display and repeater Allows the selection of the readings on the repeater and the main display 0 repeater not present default value 1 third probe reading on repeater 2 third probe reading also on the main display 3 second probe reading defrost probe on repeater Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 0 external display not present 8 Calibration of the third probe cabinet hot point The value assigned to this parameter is added to positive value or subtracted from negative value the temperature measured by probe S3 For example to reduce the temperature by 2 3 degrees 8 must be set to 2 3 The offset may range from 20 to 20 with decimal precision between 19 9 and 19 9 Available on all models Def 0 0 no offset to probe reading Cod 030220191 rel 2 0 dated 25 06 01 24 9 defrost with probe 3 This parameter allows a defrost to be carried out using probes S2 and S3 together if set to 1 In this case the temperature defrost ends when the temperature measured by both probes is greater than or equal to that set as the end defrost temp
90. the Master if on the Master A9 1 A4 A5 A8 6 control off by digital contact Contact closed On contact open Off In Off status the controller displays the temperature alternating with the symbol _ _ It only displays the temperature and does not control the compressor or the fans which are off nor monitors for any alarms In the case where the temperature displayed is outside the limits of the instrument the code or is displayed out of range The instrument ignores requests for defrost continuous cycle and Duty Setting If the instrument in Off status is a Master with a sub network of Slaves this may still manage a network defrost even using another digital contact and signal any alarms on remote units ATTENTION machines where A8 6 can be placed in Off status by a command from the supervisory system if the latter exploits the functions supplied by the Master or by the opening of the second digital input DIN2 on the Master if on the Master A9 1 and if the machine is a Slave A4 A5 A8 7 automatic variation of the set point by digital contact Contact closed night time set point contact open daytime set point set point set by user interface using the SEL button For the night time set point the value of the set point is added to the value with sign of parameter r4 Thus the new set point is Daytime set point r4 The switching on of the lights is associated to the opening of the digita
91. um time between two successive compressor stats c o 15 min o c2_ Minimumcompressorofftime o C 0 15 min 0 c3 ___ Minimum compressor on time East EA ER E Relay safety 0 compressor always OFF al ES 100 compressor always ON FEDE ec Continuouseycle duration c o 15 hours SETT Cod 030220191 rel 2 0 dated 25 06 01 27 c0 Delay in switching on the compressor and fans if controlled after switching on the instrument From when power is supplied to the controller the start up of the compressor is delayed by a time in minutes equal to the value assigned a this parameter This delay serves to protect the compressor from repeated start ups when there are interruptions to the power supply For example setting c0 6 the compressor will wait 6 minutes before starting from when power is supplied In the case of systems with more than one compressor the parameter c0 may also be used to prevent the simultaneous starts of the units In this case a different value of c0 should be set for each compressor A nia aan a dep ani rai lr ia ON Parameter can be transferred via LAN from the Master to its power ON en RR ds ore Connected Slaves po Saya ee eee on Available on all models I Def c0 0 no delay is set for the activation of the compressor following Teer reduser 1 o the start up of the instrument ON compressore compressor el Minimum time between two compresso
92. ured using H1 3 Available on models IRMPX10000 IRMPX1M000 IRMPX1A000 IRMPXM0000 IRMPXMM000 IRMPXMA000 Def HI 3 the relay is configured as a network auxiliary H2 Enable remote control Enables or disables the use of the remote control for the instruments that feature this function H2 0 remote control enabled H2 1 remote control disabled Available on models IRMPX0A000 IRMPX1A000 IrmpxMA000 IRMPXMAC00 Def H2 1 H3 Instrument identification code for programming by remote control This parameter sets the code that enables the controller to receive the commands from the remote control If there are a series of instruments enabled for the use of the remote control when pressing the start button on the remote control all the instruments will respond waiting for the code from the remote control this code thus allows the operator to identify and thus select which instrument to operate on Available on models IRMPX0A000 IRMPX1A000 IrmpxMA000 IRMPXMAC00 Def H3 0 Number of Slaves parameter accessible only on the Master units 0 LAN not present Slave address in the LAN parameter accessible only on the Slave units 0 LAN not present In Configuration parameter of the single unit as Master In 1 or Slave In 0 Sn Number of Slaves This parameter informs the Master of the number of Slaves it must manage It can be accessed using a password 22 and is used during the insta
93. witched on can be useful in certain particular situations for example if the installation suffers from frequent blackouts If there is a power failure the internal clock that calculates the intervals between two defrosts will be set to zero In extreme cases if the frequency of power failures is greater than the frequency of defrosts for example a power failure every 8 hours with a defrost interval of 10 hours the controller would never command a defrost In such a situation it is better to activate defrost at power on especially if defrost is set by temperature evaporator probe so as to avoid unnecessary defrosts or at least reduce the duration of such In the case of multi unit installations if defrost at power on is chosen when power is restored all the units may start defrosting at the same time and therefore the power supply will be overloaded To avoid this use parameter d5 which allows an initial delay in defrost this delay obviously has to set to a different value for each unit Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def d4 0 the instrument does not perform a defrost on start up d5 Delay of defrost at power on or start of Multi function This parameter sets the time that is to elapse between the controller power on and the start of defrost When a digital input is used either to start a defrost see parameter A4 A5 A8 3 or to convey a defrost command from an
94. y during installation It is good practice after having configured the controller s digital inputs to carry out a manual reset pressing the PRG SEL and UP buttons for 5 seconds of the controller In the case of a multiplexed network slaved using the virtual digital input of the Master to a supervisory system that controls for example the synchronisation of the defrosts the day night set point etc the propagation of the second digital input of the Master must be disabled setting A9 0 from the supervisory system before using the command interface that the Master offers the Supervisor This operation ensures the correct response of the multiplexed network to the commands from the supervisory system and the synchronisation of the controllers to the same commands Failure to heed this warning may lead to anomalies in the operation of the controllers both in stand alone systems 1 and ii and in network systems iii A6 Compressor stop by external alarm The function of this parameter is similar to that of parameter c4 duty setting As well as acting on the probe alarm it acts on the external alarm via the multi function input A4 A5 A8 1 or2 When an external alarm occurs whether immediate or delayed the compressor works for a period equivalent to the value given to parameter A6 in minutes while remaining off for a fixed period of 15 minutes When given two particular values A6 serves the following functions A6 0 the compresso
95. ype 0 then 5 on the remote control e If the code entered corresponds to the code shown on the instrument full access is provided to the functions of the remote control and the controller enters parameter F programming mode the code C will be displayed corresponding to the parameter ambient probe calibration e Ifthe code entered does not correspond to the code displayed the controller will immediately exit the START procedure and will ignore the pressing of any buttons on the remote control other than the ENABLE button 7 6 4 MODIFYING THE MAIN PARAMETERS The buttons on the remote control used to modify the parameters buttons labelled with codes allow direct access to all type F parameters frequent for the instrument as well as type C configuration parameters Ad and ce To access one of these proceed as follows e press the button associated to the corresponding parameter e the code of the parameter will blink on the display e pressing the arrow buttons on the remote control scrolls the entire list of F parameters The possibility of scrolling the list of parameters is inhibited for safety reasons for direct access configuration parameters ec Ad and defrost times e press the SEL button on the remote control to display the current value of the parameter e press the arrow buttons to modify the value e press the SEL button to temporarily confirm the value entered e pressing PRG will permanently save t
96. ys OFF 100 compressor always ON Detection delay time for the delayed alarm input A4 2 or ey Se ae ae AS 2 ee _ Configuration of the instrument s virtual digital input Enable propagation via LAN of the second digital input on the Ren Master 1 propagation 0 no propagation Ar Enable remote alarm signals from Slaves on the Master 1 C 0 1 flag 1 remote alarm signals enabled AO Alarm and fan differentials This parameter represents the differential used for activating the high and low temperature alarms AL and AH see the diagram below and for the control of the fans see F parameters In the case of the alarms as can be seen from the diagram the value AO contributes to determining the points at which the temperature alarms actually occur Parameter can be transferred via LAN from the Master to its connected Slaves Available on all models Def 2 0 degrees allarme bassa temperatura allarme alta temperatura low temperature alarm high temperature alarm set point AH High temperature alarm It allows the high temperature alarm to be set The value of AH does not indicate the temperature at which the alarm is given but rather the maximum deviation allowed from the set point i e the requested operating temperature Therefore High temperature alarm gt set point value of AH Note that changing the set point automatically changes the high temperature alarm while the maximum

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