Dixell Installing and Operating Instructions
Contents
1. 1592009540 XW272K GB 7 3 MOUNTING WITH KEYBOARD COVER OPENING UPWARD 8 ELECTRICAL CONNECTIONS XW272K is provided with screw terminal blocks to connect cables with a cross section up to 2 5 mm for the RS485 optional and the keyboard Connecting other inputs power supply and relays XW272K is provided with Faston connections 6 3mm Heat resistant cables have to be used Before connecting cables make Sure the power supply complies with the instrument s requirements Separate the probe cables from the power supply cables from the outputs and the power connections Do not exceed the maximum current allowed on each relay in case of heavier loads use a suitable external relay N B Maximum current allowed for all the loads is 20A 8 1 PROBE CONNECTIONS The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid infiltration It is recommended to place the thermostat probe away from air streams to correctly measure the average room temperature Place the defrost termination probe among the evaporator fins in the coldest place where most ice is formed far from heaters or from the warmest place during defrost to prevent premature defrost termination 9 TTL RS485 SERIAL LINE The TTL connector allows by means of the external module TTL RS485 XJ 485 to connect the unit to a network line ModBUS RTU compatible as the d IX EL m2. Label Name Range Default Level dAO Delay of temperature alarm 0 23h50min 1 3 Pr2 at start up EdA Alarm delay at the end off 0 255 min 30 Pr2 le ee dot Delay of temperature alarm 0 255 min 15 Pr2 letercesigttetor dOA Open door alarm delay 0 255 min 15 Pr2 nPS Pressure switch activation 0 15 Pr2 number ANALOGUE INPUTS es ee ee Ot Thermostat probe calibration 12 0 12 0 C 21 21 F OE Pri Evaporator probe calibration 12 0 12 0 C Pr2 21 21 F 03 Auxiliary probe calibration 12 0 12 0 C Pr2 21 21 F Evaporator probe presence HES Temperature increase 30 30 C 0 Pr2 during the Energy Saving 22 86 F cycle DIGITAL INPUTS a eee ee Pr2 Odc Open door control No Fan Fan CPr F C Door switch polarity CL 0P 2P Configurable digital input CL OP CL Pr2 polarity i2F Digital input configuration EAL bAL PAL EAL Pr2 dFr AUS ES OnF did Digital input alarm delay 0 255 min OTHER Oooo S S Serial address 1 L Sofware release f 10 PR Ptb Mapcoe f o y o j P Probes display Pbl Pb3 PR Pr2 Access parameterlist_ P2 Dixell s r l Via dell Industria 27 32010 Z I Pieve d Alpago BL ITALY tel 39 0437 98 33 fax 39 0437 98 93 13 E mail dixell dixell com http www dixell com 2 2
3. 0 y continuous mode ON during the defrost 1592009540 XW272K GB An additional parameter FSt provides the setting of temperature detected by the evaporator probe above which the fans are always OFF This can be used to make Sure circulation of air only if his temperature is lower than set in FSt 4 KEYBOARD To display and modify target set point in programming mode it selects a parameter or confirm an operation By holding it pressed for 3s when max or min temperature is displayed it will be erased To see the max stored temperature in programming mode it browses the parameter codes or increases the displayed value By holding it pressed for 3s the fast freezing cycle is started To see the min stored temperature in programming mode it browses the parameter codes or decreases the displayed value By holding it pressed for 3s the defrost is started Switch ON and OFF the cold room light Switch ON and OFF the instrument O6606 O KEY COMBINATIONS KEN v To lock and unlock the keyboard v To enter the programming mode D To exit the programming mode Each LED function is described in the following table MODE abe La The compressor is running F FLASHING Programming P hase flashing with LE D ah Anti short cycle delay enabled ah ON The fan is running ah oin Programming Phase flashing with LED ae sfa woo The defrost is enabled 0 atk FLASHING Drip time in progress AY
4. 3 2 SECOND COMPRESSOR The second compressor is switched ON after a delay AC1 of the first compressor activation Compressors can be switched ON always with the same sequence or in an alternate way CCO Se The first compressor is always switched on before the second one CCO Al The compressors are switched on in an alternate way 3 3 FAST FREEZING When defrost is not in progress it can be activated the keypad by holding the key pressed for about 3 seconds The compressor operates in continuous mode for the time set through the CCt parameter The cycle can be terminated before the end of the set time using the same activation key for about 3 seconds 3 4 DEFROST Three defrost modes are available through the tdF parameter defrost with electrical heater hot gas or thermostatic defrost The defrost interval is control by means of parameter EdF EdF in the defrost is made every IdF time EdF Sd the interval IdF is calculate through Smart Defrost algorithm only when the compressor is ON and the evaporator temperature is bigger than SdF parameter At the end of defrost the drip time is controlled through the Fdt parameter 3 5 CONTROL OF EVAPORATOR FANS The fan control mode is selected by means of the FnC parameter C n running with the compressor OFF during the defrost C y running with the compressor ON during the defrost O n continuous mode OFF during the defrost
5. Hot key and push key the uPL message appears 3 Push SET key to start the UPLOAD the uPL message is blinking 4 Turn OFF the instrument remove the Hot Key plug in the TTL serial cable then turn itON again At the end of the data transfer phase the instrument displays the following messages end for right programming err for failed programming In this case push SET key if you want to restart the programming again or remove the not programmed Hot key 11 ALARM SIGNALS Message Cause Outputs P1 Thermostat probe failure Alarm output ON Compressor output according to parameters COn and COF Evaporator probe failure Alarm output ON Other outputs unchanged Auxiliary probe failure Alarm output ON Other outputs unchanged Maximum temperature Alarm output ON Other outputs unchanged alarm Minimum temperature Alarm output ON Other outputs unchanged alarm The alarm message is displayed until the alarm condition is recovery Installing and Operating Instructions All the alarm messages are showed alternating with the room temperature except for the P1 which is flashing To reset the EE alarm and restart the normal functioning press any key the rst message is displayed for about 3s 11 1 SILENCING BUZZER Once the alarm signal is detected the buzzer can be silenced by pressing any key Buzzer is mounted in the T620 keyboard a
6. case 155x114 height 70mm Self extinguishing ABS IP55 PS case 147x110 height 47mm Self extinguishing ABS IP55 UL approved Connections Screw terminal block lt 2 5 mm heat resistant wiring and 6 3mm Faston Power supply 230Vac or 110Vac 10 Power absorption 10VA max Inputs 3 NTC probes Digital inputs 2 free voltage Relay outputs Total current on loads MAX 20A compressor relay SPST 20 8 A 250Vac light relay SPST 16 3 A 250Vac fans relay SPST 8 3 A 250Vac defrost relay SPST 8 3 A 250Vac alarm SPST relay 8 3 A 250Vac 2nd Compressor SPST relay 20 8 A 250Vac Serial output TTL standard RS 485 optional Communication protocol Modbus RTU Data storing on the non volatile memory EEPROM Kind of action 1B Pollution grade normal Software class A Operating temperature 0 60 C Storage temperature 25 60 C Relative humidity 20 85 no condensing Measuring and regulation range NTC probe 40 110 C 58 230 F Resolution 0 1 C or 1 C or 1 F selectable Accuracy ambient temp 25 C 0 5 C 1 digit 13 CONNECTIONS 13 1 XW272K 2 Comp Fan bf lot 25 Comp ALARM RS485 sare Door switch T620 Keyboard HOT KEY Hot key for programming 11 12 Alarm relay Connector Description Connector Description el ae oe RS485 RS 485 direct output 13 14 Compressor relay few ee 19 20 Defrost rel
7. The Fast Freezing cycle is enabled ALARM signal In Pr2 indicates that the parameter is also presentin Prl Function of the LEDs placed on the left top side of buttons BUTTON FUNCTION MODE SET FLASHING The Set point is displayed and it can be modified SET FAST The Energy Saving is enabled FLASHING DEFROST ON The Manual Defrost is activated LIGHT ONT The Lightis ON ON OFF ON J The instrumentis OFF 4 2 HOWTO SEE THE MIN TEMPERATURE L na 3 4 3 HOWTO SEE THE MAX TEMPERATURE Press and release the key The Lo message will be displayed followed by the minimum temperature recorded By pressing the key or waiting for 5s the normal display will be restored Press and release the key 1 ua 2 The Hi message will be displayed followed by the maximum temperature recorded 3 By pressing the key or waiting for 5s the normal display will be restored 44 HOWTO RESET THE MAX AND MIN TEMPERATURE RECORDED To reset the stored temperature when max or min temperature is displayed 1 Press SET key until ST label starts blinking N B After the installation RESET the temperature stored 4 5 HOWTO SEE AND MODIFY THE SET POINT 1 Push and immediately release the SET key the display will show the Set point value 2 Q 4 The SET LED start blinking To change the Set value push the ora arrows within 10s 4 6 TO START A MANUAL DEFROS
8. Installing and Operating Instructions rel 1 0 25 10 2000 cod 1592009540 WING XW272K 1 GENERAL WARNING 11 A READ BEFORE USING THIS MANUAL e This manual is part of the product and should be kept near the instrument for easy and quick reference e The instrument shall not be used for purposes different from those described hereunder It cannot be used as a Safety device e Check the application limits before proceeding 1 2 A SAFETY PRECAUTIONS e Check the supply voltage is correct before connecting the instrument e Do not expose to water or moisture use the controller only within the operating limits avoiding sudden temperature changes with high atmospheric humidity to prevent formation of condensation e Warning disconnect all electrical connections before any kind of maintenance e Fitthe probe where it is not accessible by the End User The instrument must not be opened e In case of failure or faulty operation send the instrument back to the distributor or to Dixell s r l See address with a detailed description of the fault Consider the maximum current which can be applied to each relay see Technical Data e Ensure that the wires for probes loads and the power supply are separated and far enough from each other without crossing or intertwining e n case of applications in industrial environments the use of mains filters our mod FT1 in parallel with inductive loads could be useful 2 GENE
9. LATION Hy Differential 0 1 25 5 C 1 45 F Intervention differential for set point always positive Compressor Cut IN is Set Point Plus Differential Hy Compressor Cut OUT is when the temperature reaches the set point LS Minimum set point limit 50 0 C SET 58 F SET Sets the minimum acceptable value for the set point US Maximum set point limit SET 110 C SET 230 F Set the maximum acceptable value for set point OdS Outputs activation delay at start up 0 255 min This function is enabled at the initial start up of the instrument and inhibits any output activation for the period of time set in the parameter AUX and Light can work CCO Compressors configuration Se Al Se The first compressor is always switched on before the second one Al The compressors are switched on in an alternate way AC Anti short cycle delay 0 30 min interval between the compressor stop and the following restart AC1 Time delay between turning on compressor 1 and 2 0 255 sec allows to set the delay between turning on the first and the second compressor CCt Thermostat override Omin 23h 50min allows to set the length of the continuous cycle Can be used for instance when the room is filled with new products Con Compressor ON time with faulty probe 0 255 min time during which the compressor is active in case of faulty thermostat probe With COn 0 compressor is always OFF COF Compressor OFF time with faulty probe 0 255 mi
10. RAL DESCRIPTION Model XW272K is microprocessor based controller suitable for applications on medium or low temperature refrigerating units It must be connected by means of a two wire cable 1mm at a distance of up to 30 meters to the keyboard T620 It is provided with six relay outputs to control two compressors defrost which can be either electrical or hot gas the evaporator fans the lights and the alarm It is also provided with three NTC probe inputs one for temperature control one to control the defrost end temperature of the evaporator and the third optional for the display There are two digital inputs free contact for the door switch and configurable by parameter The standard TTL output allows the user to connect by means of a TTL RS485 external module a ModBUS RTU compatible monitoring system and to programme the parameter list with the Hot Key An optional output for RS485 direct is available 3 CONTROLLING LOADS LED bd PEC es ca Es 3 1 THE COMPRESSOR The regulation is performed according to the temperature measured by the thermostat probe with a positive differential from the set point if the temperature increases and reaches set point plus differential the compressor is started and then turned off when the temperature reaches the set point value again In case of fault in the thermostat probe the start and stop of the compressor are timed through parameters COn and COF
11. T To memorise the new set point value push the SET key again or wait 10s 1 Push the DEF key for more than 2 seconds and a manual defrost will start 4 7 TO ENTER IN PARAMETERS LIST PR1 To enter the parameter list Pr1 user accessible parameters operate as follows 1 Enter the Programming mode by pressing the Set and DOWN key for few seconds af and a start blinking 2 The instrument will show the first parameter present in Prl 48 TO ENTER IN PARAMETERS LIST PR2 To access parameters in Pr2 1 Enter the Pr1 level 2 Select Pr2 parameter and press the SET key 3 The PAS flashing message is displayed shortly followed by O with a flashing zero 4 Use e ora to input the security code in the flashing digit confirm the figure by pressing SET The security code is 321 5 If the security code is correct the access to Pr2 is enabled by pressing SET on the last digit Another possibility is the following after switching ON the instrument the user can push Set and DOWN keys within 30 seconds NOTE each parameter in Pr2 can be removed or put into Pr1 user level by pressing SET When a parameter is presentin Pr LED Q is on 4 9 HOWTO CHANGE THE PARAMETER VALUE Enter the Programming mode Select the required parameter with ora Press the SET key to display its value E
12. a and oh LED starts blinking Use ora to change its value 5 Press SET to store the new value and move to the following parameter To exit Press SET UP or wait 15s without pressing a key NOTE the new programming is stored even when the procedure is exited by waiting the time out 4 10 HOWTO LOCK THE KEYBOARD 1 Keep the and keys pressed together for more than 3 s the anda keys 2 The POF message will be displayed and the keyboard is locked At this point it is only possible the viewing of the set point or the MAX o Min temperature stored and to switch ON and OFF the light the auxiliary output and the instrument TO UNLOCK THE KEYBOARD Keep the anda keys pressed together for more than 3s 4 11 ON OFF FUNCTION By pushing the ON OFF key the instrument shows OFF for 5 sec and the ON OFF LED is switched ON During the OFF status all the relays are switched OFF and the regulations are stopped if a monitoring system is connected it does not record the instrument data and alarms N B During the OFF status the Light and AUX buttons are active 4 12 TO SEE THE PROBE VALUES Enter in Pr2 level Select Prd parameter with ora Press the SET key to display Pb1 label alternate with Pb1 value Use anda keys to display the other probe values Press SET to move to the following parameter on ee WN XW272K 5 PARAMETER LIST REGU
13. al the temperature alarm condition after closing the door doA Open door alarm delay 0 255 min delay between the detection of the open door condition and its alarm signalling the flashing message dA is displayed nPS Pressure switch number 0 15 Number of activation of the pressure Switch during the did interval before signalling the alarm event 12F PAL PROBE INPUTS Ot Thermostat probe calibration 12 0 12 0 C 21 21 F allows to adjust possible offset of the thermostat probe OE Evaporator probe calibration 12 0 12 0 C 21 21 F allows to adjust possible offsets of the evaporator probe 03 Auxiliary probe calibration 12 0 12 0 C 21 21 F allows to adjust possible offsets of the evaporator probe P2P Evaporator probe presence n not present the defrost stops only by time y present the defrost stops by temperature and time P3P Auxiliary probe presence n not present y present HES Temperature increase during the Energy Saving cycle 30 0 C 30 0 C 22 86 F sets the increasing value of the set point during the Energy Saving cycle DIGITAL INPUTS odc Compressor and fan status when open door no normal Fan Fan OFF CPr Compressor OFF F_C Compressor and fan OFF 11P_ Door switch input polarity CL the digital input is activated by closing the contact OP the digital input is activated by opening the contact 12P Configurable digital input polarity CL the digital in
14. ay Defrost probe Configurable digital input 18 19 2nd compressor relay Pow O oS 14 DEFAULT SETTING VALUES Label Name Range Default Level REGULATION PCP XW272K LS US 5 23 Hy Differential 0 1 25 5 C 2 4 Prl 1 45 F LS Minimum set point SET 230 F Start up Compressors configuration AC Anti short cycle delay 0 30 min 1 Prl pT e a a fast freezing COn Compressor ON time with 0 255 min 15 Pr2 pn leans a a CO 30 Pr2 F Compressor OFF time with 0 255 min faulty probe p DISPLAY y e measurement unit gt imegeecrtoim e integer decimal point Red Remote display P1 192 P1 Pr2 DEFROST CE e EdF Defrostmode msd n f PR DEFROST 22 86 F dtE Defrost termination temp 50 0 110 C 8 46 Prl 1 Evaporator 58 230 F IdF Interval between defrost 1 120h Prl MdF Maximum length for 1 0 255 min 30 Prl dFd Pr2 Displaying during defrost rt it SEt It dEF dEG defrost Fot Drainingtime S060 min 0 PR dPO Firstdefrostafter startup ny N PR dAF Defrost delay after fast 0 23h 50 min 2 Pr2 freezing O FANS SC CidC FnC Fans operating mode C n C y Pr2 O n O y Fans delay after defrost 0 255 min alarms rE Ab rE Pr2 ALU MAXIMUM temperature 50 0 110 C 10 20 Prl ALL minimum temperature alarm AFH Temperature alarm and fan 0 1 25 5 C 2 4 differential 1 45 F Temperature alarm delay 0 255 min Temperature
15. ditions After the defrost is finished the normal regulation will restart only if the digital input is disabled otherwise the instrument will wait until the Mdf safety time is expired 6 6 CONFIGURABLE INPUT ENERGY SAVING ES The Energy Saving function allows to change the set point value as the result of the SET HES parmeter sum This function is enabled until the digital input is activated 6 7 CONFIGURABLE INPUT REMOTE ON OFF ONF This function allows to switch ON and OFF the instrument 6 8 DIGITAL INPUTS POLARITY The digital inputs polarity depends on I1P and I2P parameters CL the digital input is activated by closing the contact OP the digital input is activated by opening the contact 7 INSTALLATION AND MOUNTING T620 keyboard shall be mounted on vertical panel in a 150x31 mm hole and fixed using two screws 3 x 2mm To obtain an IP 65 protection grade use the front panel rubber gasket mod RG L Power module XW272K shall be mounted in a panel with two or more screws and it must be connected to the keyboard by means of a two wire cable 1mm The temperature range allowed for correct operation is 0 60 C Avoid places subject to strong vibrations corrosive gases excessive dirt or humidity The same recommendations apply to probes Let the air circulate by the cooling holes 7 1 1620 CUT OUT a 1 7 2 MOUNTING WITH KEYBOARD COVER OPENING DOWNWARD cuer A
16. etween the defrost end and evaporator fans start FSt Fan stop temperature 50 110 C 58 230 F setting of temperature detected by evaporator probe above which the fan is always OFF ALC Temperature alarm configuration rE High and Low alarms related to Set Point Ab High and low alarms related to the absolute temperature ALU High temperature alarm setting ALC rE 0 50 C or 90 F ALC Ab ALL 110 C or 230 F when this temperature is reached and after the ALd delay time the HA alarm is enabled ALL Low temperature alarm setting ALC rE 0 50 C or 90 F ALC Ab 50 C or 58 F ALU when this temperature is reached and after the ALd delay time the LA alarm is enabled AFH Temperature alarm and fan differential 0 1 25 5 C 1 45 F Intervention differential for temperature alarm set point and fan regulation set point always positive ALd Temperature alarm delay 0 255 min time interval between the detection of an alarm condition and the corresponding alarm signalling dAO Delay of temperature alarm at start up Omin 23h 50min time interval between the detection of the temperature alarm condition after the instrument power on and the alarm signalling EdA Alarm delay at the end of defrost 0 255 min Time interval between the detection of the temperature alarm condition at the end of defrost and the alarm signalling dot Delay of temperature alarm after closing the door 0 255 min Time delay to sign
17. is present sets the temperature measured by the evaporator probe which causes the end of defrost idF Interval between defrosts 1 120h Determines the time interval between the beginning of two defrost cycles MdF Maximum duration of defrost 0 255 min When P2P n no evaporator probe it sets the defrost duration when P2P y defrost end based on temperature it sets the maximum length for defrost dFd Display during defrost rt real temperature it temperature reading at the defrost start Set set point dEF dEF label dEG dEG label dAd Defrost display time out 0 255 min Sets the maximum time between the end of defrost and the restarting of the real room temperature display Fdt Drain down time 0 60 min time interval between reaching defrost termination temperature and the restoring of the control s normal operation This time allows the evaporator to eliminate water drops that might have formed due to defrost dPO First defrost after start up y Immediately n after the IdF time dAF Defrost delay after fast freezing Omin 23h 50min after a Fast Freezing cycle the first defrost will be delayed for this time FnC Fan operating mode C n running with the compressor OFF during the defrost C y running with the compressor ON during the defrost O n continuous mode OFF during the defrost 0 y continuous mode ON during the defrost Fnd Fan delay after defrost 0 255 min The time interval b
18. n time during which the compressor is off in case of faulty thermostat probe With COF 0 compressor is always active DISPLAY CF Temperature measurement unit C Celsius F Fahrenheit When the measurement unit is changed the SET point and the values of the regulation parameters have to be modified rES_ Resolution for C in 1 C de 0 1 C allows decimal point display de 0 1 C in 1 C Red Remote display select which probe is displayed by the remote display T620 P1 Thermostat probe P2 Evaporator probe P3 auxiliary probe 1r2 difference between P1 and P2 P1 P2 DEFROST tdF Defrost type rE electrical heater Compressor OFF rT thermostat defrost During the defrost time MdF the heater switches On and OFF depending on the evaporator temperature and dtE value in hot gas Compressor and defrost relays ON EdF Defrost mode in interval mode The defrost starts when the time Idf is expired Sd Smartfrost mode The time IdF interval between defrosts is increased only when the compressor is running even non consecutively and only if the evaporator temperature is less than the value in SdF set point for SMARTFROST SdF Set point for SMARTFROST 30 30 C 22 86 F evaporator temperature which allows the IdF counting interval between defrosts in SMARTFROST mode dtE Defrost termination temperature 50 0 110 0 C 58 230 F Enabled only when the evaporator probe
19. nd it is an option 11 2 EE ALARM The d IX EL instruments are provided with an internal check for the data integrity Alarm EE flashes when a failure in the memory data occurs In such cases the alarm output is enabled 11 3 ALARM RECOVERY Probe alarms P1 probel faulty P2 and P3 they automatically stop 10s after the probe restarts normal operation Check connections before replacing the probe Temperature alarms HA and LA automatically st op as soon as the thermostat temperature returns to normal values or when the defrost starts Door switch alarm dA stop as soon as the door is closed External alarms EAL BAL stop as soon as the external digital input is disabled PAL alarm is recovered by switching OFF the instrument 12 TECHNICAL DATA T620 keyboard Housing self extinguishing ABS Case facia 38x185 mm depth 23mm Mounting panel mounting in a 150x31 mm panel cut out with two screws 3 x 2mm Distance between the holes 165mm Protection IP 20 Frontal protection IP65 with frontal gasket mod RG L optional Connections Screw terminal block lt 2 5 mm heat resistant wiring and 6 3mm Power supply from XW272K power module Display 3 digits red LED 14 2 mm high Optional output buzzer Power module XW272K Case OS open board 132x 94 mm height 40mm OA open board with aluminium protection 176x 123mm height 52mm GS
20. onitoring system XJ 500 Version 3 0 The same TTL connector is used to upload and download the parameter list of the HOT KEY The instruments can be ordered wit the serial output RS 485 Optional 10 USE OF THE PROGRAMMING HOT KEY The Wing units can UPLOAD or DOWNLOAD the parameter list from its own E2 internal memory to the Hot Key and vice versa 10 1 DOWNLOAD FROMTHE HOT KEY TO THE INSTRUMENT 1 Turn OFF the instrument by means of the ON OFF key remove the TTL serial cable if present insert the Hot Key and then turn the Wing ON 2 Automatically the parameter list of the Hot Key is downloaded into the Wing memory the DoL message is blinking After 10 seconds the instrument will restart working with the new parameters 3 Turn OFF the instrument remove the Hot Key plug in the TTL serial cable then turn it ON again At the end of the data transfer phase the instrument displays the following messages end for right programming The instrument starts regularly with the new programming err for failed programming In this case turn the unit off and then on if you want to restart the download again or remove the Hot key to abort the operation 10 2 UPLOAD FROM THE INSTRUMENT TO THE HOT KEY 1 Turn OFF the instrument by means of the ON OFF key and remove the TTL serial cable if present then turn itON again 2 When the Wing unit is ON insert the
21. put is activated by closing the contact OP the digital input is activated by opening the contact 12F Digital input operating mode configure the digital input function EAL generic alarm bAL serious alarm mode PAL Pressure switch dFr Start defrost AUS Not used Es Energy Saving onF remote On OFF did Time interval delay for digital input alarm 0 255 min Time interval to calculate the number of the pressure switch activation when I2F PAL If I2F EAL or bAL external alarms did parameter defines the time delay between the detection and the successive signalling of the alarm OTHER Adr RS485 serial address 1 247 Identifies the instrument address when connected to a ModBUS compatible monitoring system Rel Release software read only Software version of the microprocessor Ptb Parameter table read only it shows the original code of the d IX EL parameter map Prd Probes display read only display the temperature values of the evaporator probe Pb2 and the auxiliary probe Pb3 Pr2 Access to the protected parameter list read only 6 DIGITAL INPUTS The Wing series can support up to 2 free contact digital inputs One is always configured as door switch the second is programmable in seven different configurations by the I2F parameter 1 2 Dix ell rel 1 0 25 10 2000 cod 1592009540 6 1 DOOR SWITCH INPUT It signals the door status and the corresponding relay output status through
22. the odc parameter no normal any change Fan Fan OFF CPr Compressor OFF F_C Compressor and fan OFF Since the door is opened after the delay time set through parameter dOA the alarm output is enabled and the display shows the message dA The alarm stops as soon as the external digital input is disabled again During this time and then for the delay dot after closing the door the high and low temperature alarms are disabled 6 2 CONFIGURABLE INPUT GENERIC ALARM EAL As soon as the digital input is activated the unit will wait for did time delay before Signalling the EAL alarm message The outputs status don t change The alarm Stops just after the digital input is de activated 6 3 CONFIGURABLE INPUT SERIOUS ALARM MODE BAL When the digital input is activated the unit will wait for did delay before signalling the BAL alarm message The relay outputs are switched OFF The alarm will stop as soon as the digital input is de activated 6 4 CONFIGURABLE INPUT PRESSURE SWITCH PAL If during the interval time set by did parameter the pressure switch has reached the number of activation of the nPS parameter the PAL pressure alarm message will be displayed The compressor and the regulation are stopped When the digital input is ON the compressor is always OFF 6 5 CONFIGURABLE INPUT START DEFROST DFR It executes a defrost if there are the right con
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