Eliwell EWRC 300 NT User Manual
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Eliwell EWRC 300 NT User Manual

Controllers for cold rooms for on-board installation
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EWRC 300/500 NT
Controllers for cold rooms for on-board installation
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Summary of Contents for Eliwell EWRC 300 NT

  • Page 1 EWRC 300/500 NT Controllers for cold rooms for on-board installation USER MANUAL...

  • Page 2: Table Of Contents

    CONTENTS 1. INTRODUCTION ..................5 1.1. GENERAL DESCRIPTION ....................5 1.2. ADVANTAGES AND FEATURES ..................5 1.3. MODELS .......................... 5 2. TECHNICAL DATA ..................6 2.1. TECHNICAL SPECIFICATIONS (EN 60730-2-9) ..............6 2.2. FURTHER INFORMATION ....................6 2.2.1. INPUT CHARACTERISTICS ...............................6 2.2.2.
  • Page 3 6. FUNCTIONS AND REGULATORS ..............26 6.1. SETTINGS ........................26 6.1.1. PROBE SETTING AND CALIBRATION ..........................26 6.1.2. DISPLAY SETTINGS ................................26 6.2. FUNCTIONS ........................27 6.2.1. UPLOAD, DOWNLOAD, FORMAT ...........................27 6.2.2. MULTI FUNCTION KEY ..............................28 6.2.3. UNICARD ....................................28 6.3. BOOT LOADER FIRMWARE ....................29 6.4.
  • Page 4 7. PARAMETERS .................... 52 7.1. HOW TO MODIFY THE USER PARAMETERS ..............52 7.2. HOW TO EDIT THE INSTALLER LEVEL PARAMETERS ............52 7.3. PARAMETER TABLE ......................53 7.3.1. PARAMETER H60 ................................62 8. ALARMS ..................... 63 8.1. ALARMS AND SIGNALS TABLE ..................63 8.2.

  • Page 5: Introduction

    The HACCP function sets, maintains and memorises temperature measurements and any associated alarms, ensuring the quality and hygiene of stored products. EWRC 300 NT - Versions with 3 configurable relays for controlling al the accessory loads in the room. •...

  • Page 6: Technical Data

    0.1 °C 0.1 °C Resolution 0.1 °F 0.1 °F F.S. precision 0.5 % f.s. + 1 digit 0.5 % f.s. + 1 digit Impedance * probes not included - contact the Eliwell Sales Office for accessories EWRC 300/500 NT Pg. 6/89...

  • Page 7: Output Characteristics

    - Climate range A. - Measurement class 1 in the -25 ... 15 °C range (*). (* exclusively using Eliwell probes) NOTE: The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer to the instrument alone and not to any accessories provided, such as the probes.

  • Page 8: Connections

    Attach the 120 Ω 1/4 W resistors between the "+" and "-" terminals on the interface and the last controller in each branch of the network. 3.1.5. TTL CONNECTION Use a 5-wire TTL cable up to 3 m in length. An Eliwell-supplied TTL cable is recommended. Contact Eliwell Sales Office for item availability. EWRC 300/500 NT Pg. 8/89...

  • Page 9: Wiring Diagram

    3.2. WIRING DIAGRAM EWRC300/500 NT Yellow cable UNICARD COPY CARD DISPLAY RS485 OPTIONAL EWRC 500NT only ELIWELL ELIWELL OUT1 OUT2 OUT3 OUT4 OUT5 20 21 PB1 PB2 DI2 DI1 230V~ PB3/DI3 3.2.1. TERMINALS TERMINALS 1, 5, 8 9, 10 LINE/NEUTRAL. Power supply Analogue input Pb1 N.O.

  • Page 10: Wiring Diagram For Models With Magneto-Thermal Switch Installed

    3.3. WIRING DIAGRAM FOR MODELS WITH MAGNETO-THERMAL SWITCH INSTALLED EWRC500 NT BREAKER OUT1 OUT2 OUT3 OUT4 OUT5 20 21 PB1 PB2 DI2 DI1 PB3/DI3 230V~ 3.3.1. TERMINALS TERMINALS 1, 5, 8 9, 10 LINE/NEUTRAL. Power supply Analogue input Pb1 N.O. OUT1 Analogue input Pb2 NEUTRAL Analogue input Pb3 / Digital input DI3...

  • Page 11: Mechanical Installation

    4. MECHANICAL INSTALLATION 4.1. MECHANICAL INSTALLATION Do not install the device in damp and/or dirty areas; it is intended for use in sites with ordinary or normal levels of pollution. Keep the area around the instrument cooling slots adequately ventilated. 4.1.1.
  • Page 12 Removing the cover Wall installation [UM] mm EWRC 300/500 NT Pg. 12/89...
  • Page 13 EWRC 300/500 NT Pg. 13/89...

  • Page 14: User And Start-Up Interface

    5. USER AND START-UP INTERFACE 5.1. DISPLAY 5.1.1. KEYS press and hold for about press and release NAVIGATION MENU Notes 3 seconds ESC key • Manual defrost • Functions menu • Output Configurable - see parameter H33 Defrost • Return to Main Menu •...

  • Page 15: Leds

    5.1.2. LEDS Meaning of LEDS: Colour Description amber not used TIME amber access in case of time display or editing DATA amber access in case of date display or editing Colour Alarms LED 7 LED 8 Buzzer Buzzer ALARM SEE "ALARM CAUSE/EFFECT TABLE" on page 64” PANIC LEAK DETECTOR PANIC + LEAK DETECTOR...

  • Page 16: Preliminary Configurations

    5.1.3. PRELIMINARY CONFIGURATIONS After making the electrical connections, simply power up the device to start operation. At first start-up, Eliwell recommends that you: Make sure the instrument is powered (green POWER SUPPLY LED on). Make sure the display is working: when the controller is powered up it performs a lamp test, during which time the display and LEDs will blink for several seconds to ensure that they all function correctly.

  • Page 17: Navigation

    5.1.5. NAVIGATION Display alarms display probe display probe SetPoint & Probes if active Turns light on/o value value Display HACCP alarms Turns instrument -20.6 -20.6 if function active on / o 1 sec set time and date 18.55 3 sec Manual 1 sec modify SetPoint...

  • Page 18: Functions Menu And Key-Activated Functions

    5.1.6. FUNCTIONS MENU AND KEY-ACTIVATED FUNCTIONS The Functions menu is used to perform a number of manual functions such as putting the device into stand-by, clearing pressure switch interventions and clearing HACCP alarms, etc. Access the Functions menu by pressing the ESC key. The following table lists the functions, which are all OFF by default.

  • Page 19: Password

    5.1.7. PASSWORD Password PA1 is disabled by default. Password PA1: allows access to User parameters. To enable it (PA1≠0): press and hold set for at least 3 seconds. The label USr appears. Press set again. Scroll through the parameters using UP and DOWN until you find label PA1, press SEt to display its value, change it using UP and DOWN and save it by pressing set or ESC.

  • Page 20: Setting The Setpoint

    Display Description Press SET Use UP and DOWN keys to enter the password Example the password is 15 Press SET installer menu accessed the first CPr folder appears If the value entered is incorrect, label PA2 will be shown again and the procedure must be repeated. 5.1.8.

  • Page 21: Viewing Probe Values

    5.1.9. VIEWING PROBE VALUES Display Description -17.8 Press and release the SET key -20.0 The upper display will show SEt, the lower display will indicate the current SetPoint value -20.0 Use the DOWN key to view the value of probe The time is displayed in HACCP models 5.28 Use the DOWN key again to view the value of...

  • Page 22: How To Modify The Date And Time

    5.1.10. HOW TO MODIFY THE DATE AND TIME Function only available in HACCP models Display Description -17.8 Press and release the SET key -20.0 The upper display will show SEt, the lower display will indicate the current SetPoint value -20.0 Use the DOWN key to display the time The CLOCK LED is on 5.28...

  • Page 23: Displaying Alarms

    5.1.11. DISPLAYING ALARMS Display Description -17.8 Press and release the UP key The upper display will show ALr -18.0 nOnE The lower display will show a. nOnE if no alarms active b. SYSt if system alarms present SYSt HACCP models ONLY The upper display will show ALr HACP The lower display will show HACP if HACCP alarms are present...

  • Page 24: Modifying A Parameter

    5.1.13. MODIFYING A PARAMETER The User parameters USr are the most frequently used ones and are NOT grouped into sub-folders. They are always visible by default (access password PA1 is not enabled by default). The same parameters are also visible in the respective folders 'Compressor', 'Fans', etc. within the Installer parameters menu InS. They are always visible by default (access password PA2 is not enabled by default).

  • Page 25: How To Modify An Installer Parameter

    5.1.13.2 How to modify an Installer parameter Instructions are provided below on how to modify the same User parameter but via the Installer menu. Let us take the dit parameter as our example. At Installer level the parameter is in the folder containing dEF defrost parameters. We will now show how to change the value from 8h to 6h.

  • Page 26: Functions And Regulators

    6. FUNCTIONS AND REGULATORS This section describes the various functions of the devices. IMPORTANT: some functions may not be available in certain models. 6.1. SETTINGS 6.1.1. PROBE SETTING AND CALIBRATION EWRC 300/500 NT have 3 configurable NTC/PTC inputs (PB1 ... PB3). The temperature probes (PB1 ...

  • Page 27: Functions

    6.2. FUNCTIONS 6.2.1. UPLOAD, DOWNLOAD, FORMAT Description The Unicard/Multi Function Key is connected to the serial port (TTL) and allows fast programming of instrument parameters. DOWNLOAD from reset operating mode: at power-on, if the Unicard/Multi Function Key is inserted in the device, the controller automatically downloads data.

  • Page 28: Multi Function Key

    6.2.2. MULTI FUNCTION KEY The Multi Function Key lets you download/upload a parameter map from/to a controller. Regardless of whether you are down or uploading a parameter map, the controller must be connected to a power supply and switched on. 6.2.3.

  • Page 29: Boot Loader Firmware

    In order to download the Firmware application on the UNICARD (in CLONE mode as used for parameters maps) you must use the Device Manager (version 05.00.06 or later), which you can download from the Eliwell site after having registered at level 2.

  • Page 30: Compressor

    6.4. COMPRESSOR The compressor is controlled by the device's relay. It will be switched on or off depending on: • the temperature status readings from the cold room probe • the temperature control functions set • the defrost/dripping functions (see Defrost section) 6.4.1.

  • Page 31: Compressor/General Protections

    6.5. COMPRESSOR/GENERAL PROTECTIONS Description If the cold room probe is in error E1 the output relay configured as compressor/general regulates in accordance with the times set in parameters Ont and OFt. The first time to consider is Ont. If Ont > 0, the protection programmed in parameters dOn-dOF-dbi must be respected (see Compressor Safety Times).

  • Page 32: Compressor Safety Timings

    6.5.1. COMPRESSOR SAFETY TIMINGS Compressor on-off operations must respect the safety times that you can set using the special parameters as described below. The compressor LED will flash to indicate when an activate compressor request has been received but a safety protection exists.

  • Page 33: Defrost/Dripping

    6.6. DEFROST/DRIPPING 6.6.1. DEFROST TYPE AND ACTIVATION Defrost is used to stop ice from forming on the surface of the evaporator. Its activation can be: • automatic, in one of the following modes selected via dCt: • compressor hours (Digifrost); •...

  • Page 34: Automatic Defrosting

    6.6.2. AUTOMATIC DEFROSTING The defrost cycle is programmed to start at intervals. NOTE: To disable the automatic cycle, set dit=0. If dit>0, then defrost cycles will be run at fixed intervals, as indicated in parameter dit, and the interval time is counted as follows: Par.

  • Page 35: External Defrost

    6.6.4. EXTERNAL DEFROST If the Digital Input is configured for this function (if H11 ... H13 = 1) and if conditions permit, defrost can be requested and the relative regulator activated. Time graphs for signals in each of the various function modes are presented below. IMPORTANT: Defrost activation occurs when the signal is toggled and the polarity can be selected.

  • Page 36: Defrost Mode

    6.7. DEFROST MODE 6.7.1. DEFROST WITH ELECTRIC HEATERS Defrost with electrical heaters is configured by setting dtY = 0. The compressor remains stopped for the duration of the defrost cycle and the relay configured as defrost regulator output, to which the electrical heaters are connected, activates.

  • Page 37: Inverse Defrost

    6.7.2. INVERSE DEFROST Hot gas defrost is configured by setting parameter dtY = 1. The compressor stays on for the entire duration of the defrost cycle and the relay configured as defrost regulator output, and that the solenoid valve is connected to, activates. On completion of the defrost cycle, the solenoid valve relay is de-energised and the dripping phase set in parameter dt (if not equal to zero) is interrupted.

  • Page 38: Double Evaporator Defrost

    6.7.3. DOUBLE EVAPORATOR DEFROST The defrost for a second evaporator can be controlled via the probe configured as second evaporator. Configure a relay output (see configuration parameters H21...H25) as a defrost relay for evaporator 2. To enable this function, you need to: •...
  • Page 39 User parameters The parameters that manage this regulator are: Label Description Selects defrost type Time interval between 2 consecutive defrost cycles Selects the count mode for the defrost interval Defrost cycle activation delay after request Defrost timeout, evaporator 1. Determines the maximum defrost duration Defrost timeout, evaporator 2.

  • Page 40: Evaporator Fans

    6.8. EVAPORATOR FANS 6.8.1. EVAPORATOR FAN OPERATING CONDITIONS The regulator is active when: • the time set in parameter OdO has elapsed. • the temperature of the evaporator probe, if present, is between the values of the parameters Fot and FSt. •...

  • Page 41: Fan Operation In Thermoregulation Mode

    6.8.2. FAN OPERATION IN THERMOREGULATION MODE During "cooling", the fans operate as shown in this diagram: Thermostat control of fans takes place at the values set in parameters • FSt (fan disabling temperature) and FAd (fan differential). • Fot (fan start temperature) and FAd but with the sign inverted. By default, the fan disabling temperature, set by parameters FSt (fan disabling temperature) and FAd (fan differential), is an absolute value, as FPt = 0 (actual temperature value).

  • Page 42: Fan Operation In Defrost

    6.8.4. FAN OPERATION IN DEFROST During defrost, the fans operate as shown in this diagram: dFd = n: fans are not excluded during defrost THERMOREGULATION / DUTY CYCLE (see parameters FCO, Fon, FoF) dFd = y: exclusion of fans during defrost Thermostat control of fans takes place at the values set in parameters: •...

  • Page 43: Fan Function During Dripping

    6.8.5. FAN FUNCTION DURING DRIPPING If parameter dt ≠ 0 (dripping time), the fans will stay OFF for the time set in this parameter. See "Defrost with electrical heaters". Note that if Fdt (fan delay time) is greater than dt (dripping time) the fans stay OFF for the time set in Fdt rather than dt (e.g. whichever timing is longer will be applied).

  • Page 44: Deep Cooling Cycle - Dcc

    6.9. DEEP COOLING CYCLE - DCC Description This regulator ensures that the compressor regulates the setpoint dCS, with differential equal to the value set via parameter diF. When the DCC (Deep Cooling Cycle) activates, the interval between defrost cycles is cleared and defrosts disabled. Ending of the DCC is time-based, by setting the parameter tdc≠0, or when the setpoint dCS is reached if tdc = 0.

  • Page 45: Pressure Switch

    6.11. PRESSURE SWITCH Description This regulator performs diagnostic procedures on an activated digital input by assigning the value ±11 (General pressure switch), ±09 (Minimum pressure switch) or ±10 (Maximum pressure switch) to one of the parameters H11 ... H13. If a pressure switch input is activated, power to the compressor loads is immediately cut off, the relative alarm LED lights up to provide a visual warning and the alarms folder ALr is also displayed.

  • Page 46: Auxiliary Output (Aux/Light)

    6.11.1. AUXILIARY OUTPUT (AUX/LIGHT) Description If one of the parameters H21...H25 is set to the value H2x=5, it anticipates the relay control as AUX and, by pressing the associated key H32...H35 - which should be set to the value H3x=2, the relay is activated if it was off previously and vice-versa. The on/off status is saved in non-volatile memory hence when power returns after a blackout, the device will restart in the status that was active prior to the blackout.

  • Page 47: Door/External Alarm Management

    6.12. DOOR/EXTERNAL ALARM MANAGEMENT The door switch input is associated to an appropriately configured digital input (H1x = ±4). By controlling the opening of the door, it is possible to deactivate the compressor output and/or the fans. It is also possible to associate a deactivation delay to the compressor output by means of parameter dCO. If the door is opened during a defrost cycle, the cycle is not shut down.
  • Page 48 EWRC 300/500 NT Pg. 48/89...

  • Page 49: Demisting Heaters (Frame Heaters)

    6.13. DEMISTING HEATERS (FRAME HEATERS) The controller is equipped with a regulator for the frame heaters. Description Operating conditions The table below lists the ways the relay output can be managed: FRAME HEATER OUT >0 >0 >0 >0 DUTY CYCLE Where HOn = 0 the regulator is always off, while if HOn >...

  • Page 50: Condenser Fans

    6.14. CONDENSER FANS This regulator is associated with probe Pb3 (see specific section) and features: • SCF activation setpoint • dCF operating differential • dCd exclusion of fans during defrost • tCF activation delay after end of defrost If a digital output is set as condenser fans (H21...H25=12), this output will behave as follows: °C (Pb3) If probe Pb3 is not present and if alarm E3 is active, the regulator will always be active except during the defrost cycle.

  • Page 51: Stand-By

    6.15. STAND-BY Operating conditions The stand-by regulator can be activated by digital input (if configured) or by key (if programmed). With the device OFF the display shows "OFF" and all regulators are blocked including alarms. When the device is switched on via a key or an appropriately configured digital input, regular operation commences, the same as from power-on.

  • Page 52: Parameters

    7. PARAMETERS 7.1. HOW TO MODIFY THE USER PARAMETERS The 'User' parameters are the most useful parameters and are described in this document, in the section Parameters Table. 1) Press and hold the SET key for 3 seconds until the display shows USr 2) Press and release the SET key once more.

  • Page 53: Parameter Table

    7.3. PARAMETER TABLE PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. USr/inS Temperature control SEtpoint °C/°F -58.0...302 COMPRESSOR (CPr) Activation differential USr/inS °C/°F 0 ... 30.0 N.B.: diF cannot be equal to 0. Maximum value that can be assigned to the setpoint. USr/inS NOTE: The two setpoints are interdependent: HSE cannot be less than LSE and °C/°F...
  • Page 54 PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. Defrost interval count mode. 0 = compressor running time (DIGIFROST® method); defrost active ONLY when compressor is on. NOTE: compressor running time is counted separately from the evaporator probe (count active also when evaporator probe missing or error). USr/inS 0 ...
  • Page 55 PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. dE2m USr/inS Start time minutes weekday defrost 2. 0 ... 59 dE3H USr/inS Start time weekday defrost 3. d2H ... 23 = start hour; 24 = disabled. hours 0 ... 24 dE3m USr/inS Start time minutes weekday defrost 3. 0 ...
  • Page 56 PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. Condenser Fans °C/°F -50.0…150.0 10.0 Condenser fans activation Setpoint Condenser fans activation differential °C/°F -30.0…30.0 Condenser fans switch-on delay after defrost 0…59 Exclusion of condenser fans during defrost. flag n (0) = fans running during defrost; y (1) = fans excluded. ALARMS (ALr) Parameters HAL and LAL mode intended as the absolute temperature value or differential in relation to the Setpoint.
  • Page 57 PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. Activation delay for digital inputs DI1, DI2. 0 ... 255 Activation delay for digital inputs DI3 0 ... 255 Action forced from digital input (if PEA ≠ 0): 0 = activate compressor. 1 = activate fans. 2 = activate compressor and fans.
  • Page 58 PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. d3_E3 Enable defrost weekdays or weekends day 4. flag 0 ... 1 d4_E0 Enable functions during events day 5. 0 ... 8 d4_E1_h Event start time (hours) day 5. hours 0 ... 23 d4_E1_min Event start time (minutes) day 5.
  • Page 59 PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. Offset activation on display, thermoregulation or both: 0 = only the temperature shown is modified. 0/1/2 1 = only the temperature used by the regulators is modified; the display remains unchanged. 2 = temperature displayed is modified, which is also the one used by the regulators. Minimum value that can be displayed by the device.
  • Page 60 PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. CONFIGURATION (CnF) If one or more parameters present in the folder are changed, the controller MUST be switched off and switched on again. Selection of type of probe used (Pb1 ... Pb3). Usr/inS (0) = PTC. (1) = NTC.
  • Page 61 PAR. DESCRIPTION U.M. RANGE DEFAULT LEV. Configuration of ESC key. Same as H32. 0 ... 15 ON/OFF key configuration. Same as H33. 0 ... 15 LIGHT key configuration. Same as H34. 0 ... 15 Presence of Cold Room probe Pb1. flag n (0) = not present;...

  • Page 62: Parameter H60

    7.3.1. PARAMETER H60 Display of selected application. 0 = no vector selected; 1 = vector 1, …, 6 = vector 6. It has a subset of parameters which can be programmed in line with the type of configuration required for the installation. By setting H60, the user can also select one of the six 'sets' of pre-programmed parameters.

  • Page 63: Alarms

    8. ALARMS 8.1. ALARMS AND SIGNALS TABLE When an alarm condition is detected, the ALARM LED will come on. If present and enabled, the buzzer and alarm relay will also activate. To silence the buzzer, press and release any key, the relative icon will continue to flash. All alarms are reset automatically (i.e.

  • Page 64: Alarm Cause/Effect Table

    8.2. ALARM CAUSE/EFFECT TABLE EWRC 300/500 NT can run integral diagnostics on the installation, signalling any operating faults with specific alarms found, and record and signal any user-defined unusual events to have greater control over the system as a whole. Label Description Cause...
  • Page 65 Label Description Cause Effects Remedy If the number n of pressure switch activations is n=PEn: General pressure Switch the device off and back on again • • Label PA displayed Pressure alarm activation by general pressure switch • Reset alarms using the rPA key switch regulator.

  • Page 66: Description Of Alarms

    8.3. DESCRIPTION OF ALARMS 8.3.1. PROBE ALARM OPERATING CONDITIONS When one of the probes is out of the nominal operating range or in the case of an open probe or a probe in short circuit, an alarm is generated if this condition persists for longer than 10 seconds. The alarm condition is indicated on the display by means of the following error codes: •...

  • Page 67: Minimum And Maximum Temperature Alarm

    8.3.2. MINIMUM AND MAXIMUM TEMPERATURE ALARM OPERATING CONDITIONS The alarm regulation is carried out on probe 1. The temperature limits defined in parameters HAL and LAL are determined by parameter Att which specifies if they represent the absolute temperature value or a setpoint differential (in the case of offset on the entered setpoint, the high and low alarms will refer to this new control setpoint).

  • Page 68: End Of Defrost Due To Timeout Alarm

    8.3.3. END OF DEFROST DUE TO TIMEOUT ALARM OPERATING CONDITIONS The regulator is activated without any delay in the case of end of defrost due to timeout, instead of probe 2 reaching the defrost end temperature. The action consists of: •...

  • Page 69: Door Open Alarm

    8.3.5. DOOR OPEN ALARM OPERATING CONDITIONS The door switch alarm is associated to a specially configured digital input: • H11, H12, H13 = ± 4 On activation of the digital input (door open) and after delay tdO has elapsed, the door open alarm must be signalled in the alarms folder and the LED and alarm relay must light up The label OPd is displayed.

  • Page 70: Pressure Switch Input Alarm

    8.3.6. PRESSURE SWITCH INPUT ALARM OPERATING CONDITIONS The pressure switch is associated with a suitably configured Digital Input and can be general, minimum or maximum. NOTE: behaviour and configuration parameters are the same for all three types. Every time pressure switch input activation causes the compressor/fans to be deactivated instantly, with only visual indication of the activation (WARNING) provided via illumination of the alarm LED and recording of the number of pressure switch activations that have taken place.

  • Page 71: Refrigerant Leak Alarm

    8.3.8. REFRIGERANT LEAK ALARM OPERATING CONDITIONS The refrigerant leak (Leak Detector) alarm is associated with an appropriately configured digital input. • H11, H12, H13 = ± 21 This alarm is activated after the delay set in parameter di3 and it persists until the next digital input deactivation. The action consists of: •...

  • Page 72: Modbus Msk 554 Functions And Resources

    The master device can send messages to individual slaves or to the entire network (broadcast) whilst slaves can only respond individually to the master. The ModBUS standard used by Eliwell employs the RTU code for data transmission. 9.3.1. DATA FORMAT (RTU) The coding model used defines the structure of messages transmitted on the network and the way in which this information is deciphered.

  • Page 73: Modbus Commands Availble And Data Areas

    9.3.3. MODBUS COMMANDS AVAILBLE AND DATA AREAS The following commands are implemented: ModBUS command Description of command 03 (hex 0x03) Read 16 consecutive registers for Client side. 04 (hex 0x04) Read 1 single register for parameters. 16 (hex 0x10) Write 15 consecutive registers for Client side. 22 (hex 0x16) Write 1 register for the parameters.

  • Page 74: Parameter Visibility And Values

    9.3.5. PARAMETER VISIBILITY AND VALUES IMPORTANT: 1) When not indicated otherwise, the parameter is always visible and modifiable, unless customised settings have been configured by the user via serial. 2) If folder visibility is modified, the new setting will apply to all parameters in the folder. 9.3.6.
  • Page 75 Examples (in binary form the least significant bit is the first on the right): Default visibility: PAR. VALUE ADDRESS DATA SIZE Value Content of register 49336.6 2 BIT 65535 -------------(000000001111111111111111) 49337 2 BIT 65535 (000000001111111111111111) 49337.2 2 BIT 65535 (000000001111111111111111) 49337.4 2 BIT 65535...

  • Page 76: Parameter/Visibility Table

    9.3.7. PARAMETER/VISIBILITY TABLE NOTE: ModBUS read command: 04 (0x04) and ModBUS write command: 22 (0x16) PAR. Value Vis. PAR. DATA LABEL DESCRIPTION CPL EXP U.M. RANGE FOLDER ADDRESS ADDRESS SIZE 16386 49455 Setpoint WORD °C/°F LSE...HSE 16388 49455.2 Setpoint differential WORD °C/°F 0 ...
  • Page 77 PAR. Value Vis. PAR. DATA LABEL DESCRIPTION CPL EXP U.M. RANGE FOLDER ADDRESS ADDRESS SIZE F1_min 49356 Defrost start time (minutes) no. 1 weekend BYTE 0 ... 59 F2_h 49359 Defrost start time (hours) no. 2 weekend BYTE hours 0 ... 24 F2_min 49358 Defrost start time (minutes) no.
  • Page 78 PAR. Value Vis. PAR. DATA LABEL DESCRIPTION CPL EXP U.M. RANGE FOLDER ADDRESS ADDRESS SIZE 49286 49473.4 Select DI for lock/unlock resources function BYTE 0...3 49287 49473.6 Evaporator fan compressor activation/switch-off delay BYTE 0...255 49260 49465 Compressor activation/switch-off delay after request BYTE 0...255 49288...
  • Page 79 PAR. Value Vis. PAR. DATA LABEL DESCRIPTION CPL EXP U.M. RANGE FOLDER ADDRESS ADDRESS SIZE 16434 49477.2 Calibration Pb1 WORD °C/°F -30.0...30.0 16436 49477.4 Calibration Pb2 WORD °C/°F -30.0...30.0 16438 49477.6 Calibration Pb3 WORD °C/°F -30.0...30.0 49296 49478 Calibration operation BYTE 0/1/2 16440...

  • Page 80: Parameter/Visibility H60 Table

    PAR. Value Vis. PAR. DATA LABEL DESCRIPTION CPL EXP U.M. RANGE FOLDER ADDRESS ADDRESS SIZE Copy Card formatting function visibility 2 BIT 0...3 9.3.8. PARAMETER/VISIBILITY H60 TABLE PAR. Value Vis. PAR. DATA LABEL DESCRIPTION U.M. RANGE ADDRESS ADDRESS SIZE V0-SEt 16752 Regulation setpoint WORD...
  • Page 81 V2-ddL 49584 Lock display during defrost mode BYTE 0/1/2 V2-dFd 49585 Evaporator fans disabling during defrost time BYTE flag V3-SEt 16818 Regulation setpoint WORD °C/°F LSE ... HSE V3-diF 16820 Setpoint differential WORD °C/°F 0.1 ... 30.0 V3-LSE 16822 Minimum setpoint value that can be set WORD °C/°F LSE ...

  • Page 82: Folder Visibility Table

    9.3.9. FOLDER VISIBILITY TABLE ModBUS DATA LABEL R/W DESCRIPTION RANGE U.M. ADDRESS SIZE vis_CPr 49450 RW Display folder 2 bit 0 ... 3 num vis_dEF 49450.2 RW Display folder 2 bit 0 ... 3 num vis_FAn 49450.6 RW Display folder 2 bit 0 ...
  • Page 83 DATA LABEL ADDRESS R/W DESCRIPTION RANGE U.M. SIZE Deep Cooling 33102.5 Deep Cooling 1 bit 0 ... 1 flag Pump Down 33102.4 Pump Down 1 bit 0 ... 1 flag LIGHT_ON 33057 Lights on 1 bit 0 ... 1 LIGHT_OFF 33057.1 Lights off 1 bit...

  • Page 84: Advanced Functions - Night And Day

    10. ADVANCED FUNCTIONS - NIGHT AND DAY Events and cycles can be programmed at set times during the week using the Night&Day regulator algorithm. The parameters concerned are contained in folder nAd / sub-folder d0…d6, Ed. IMPORTANT: do not confuse labels E0 … E3 with probe error messages E1 … E2. IMPORTANT: be careful as to how E0 = 3 (stand-by regulator) is used.

  • Page 85: Operation With Defrost Group

    10.2. OPERATION WITH DEFROST GROUP If E0 is not equal to 0, the meaning of weekday parameters dE1…dE8 shifts from: Defrost group valid EVERY day (see Automatic defrost with Real Time Clock) Defrost group applicable only to weekdays. The weekday parameters dE1…dE8 are supplemented with the management of weekend/public holiday parameters F1…F8.

  • Page 86: Opening Folder Nad - Day/Night

    10.4. OPENING FOLDER NAD - DAY/NIGHT Display Description -17.8 Press SET for 3 seconds -18.0 Folder USr appears Use the UP & DOWN keys to search for the InS folder Press and release the SET key Use the UP & DOWN keys to search for the nAd folder Press and release the SET key Press and release the SET key to open the folder The first day, d0, appears...

  • Page 87: Advanced Functions - Haccp

    11. ADVANCED FUNCTIONS - HACCP To meet the minimum requirements prescribed in HACCP regulations, there is a set of dedicated parameters. These parameters can be viewed and configured in folder: HACCP (folder with label "HAC") The recording of HACCP alarms can be enabled in parameter H50≠0. IMPORTANT! SWITCH THE INSTRUMENT OFF AND ON AGAIN AFTER MODIFYING PARAMETER H50.

  • Page 88: Displaying Haccp Alarms

    11.1. DISPLAYING HACCP ALARMS Display Description The red HACCP LED will remain permanently on to indicate an HACCP alarm has occurred Press and release the UP key The upper display will show ALr HACP If HACP alarms have occurred the lower display will show HACP Press and release the SET key To access the information contained within each AHC folder, press the 'set' key...
  • Page 89 T +39 0437 986 300 E techsuppeliwell@schneider-electric.com Sales T +39 0437 986 100 (Italy) T +39 0437 986 200 (other countries) E saleseliwell@schneider-electric.com 9MA10258 - EWRC300/500 NT - EN - 02/17 © Copyright Eliwell Controls s.r.l. 2014-2017 All rights reserved...

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