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  • EWDR 981, Instrukcje, ELIWELL

    [ Pobierz całość w formacie PDF ]
    EWDR 981
    electronic controllers for refrigeration units
    cod. 9IS43091
    rel. 3/05
    GB
    USER INTERFACE
    The user interface has a 4 LED display to
    indicate status and alarms and four buttons
    for controlling instrument status and pro-
    gramming.
    DISPLAY
    This is used to display the inputs, the set
    point, the parameters and related values,
    alarms, functions and the status of the
    device.
    PARAMETER PROGRAMMING MENU
    Access the menu by pressing the ‘set’
    button for at least 5 seconds.
    The menu structure enables all
    parameter folders to be divided into two
    levels.
    All the level 1 folders can be accessed
    by entering the password ‘PA1’.
    Scroll down the level 1 folders using the
    ‘UP’ and ‘DOWN’ buttons. Press and
    release the ‘set’ button next to the
    selected label to access the parameters.
    Scroll through the labels in the folder
    using the ‘UP’ and ‘DOWN’ buttons,
    press ‘set’ to display the current value of
    the selected parameter, use the ‘UP’ and
    ‘DOWN’ buttons and set the required
    value by pressing ‘set’.
    To access the level 2 folders in the ‘Cnf’
    folder, select the ‘PA2’ label, enter the
    password ‘PA2’ and confirm with the ‘set’
    button. All the parameters that cannot
    be changed at level 1 are in this level.
    NOTE: Level 1 parameters will only be
    displayed if you quit the ‘parameter
    programming menu’ and repeat the
    steps for manipulation of level 1
    folders.
    The steps to follow for manipulation of
    level 2 parameters are the same as those
    NOTE: It is strongly recommended
    that the instrument is switched off
    and on again each time parameter
    configuration is changed in order to
    prevent malfunctioning of the
    configuration and/or ongoing timings.
    DESCRIPTION OF MENU
    Access to both menus is controlled by
    the ‘set’ button. If it is pressed and
    immediately released, the ‘machine
    status menu‘ is displayed. Hold the same
    button down for 5 seconds to access the
    ‘parameter programming menu‘.
    When one of the two menus has been
    accessed, you can navigate between the
    level 1 folders using the ‘UP’ and ‘DOWN’
    buttons. The folders are opened by
    pressing the ‘set’ button once. You can
    now scroll through the contents of each
    folder, modify it or use its functions.
    You can exit each level of both menus in
    three ways: using the ‘fnc’ button, if a
    new value is confirmed by pressing the
    ‘set’ button or, when the time-out has
    elapsed (15 seconds inactivity on the
    device).
    KEYS
    UP
    Increase in value of
    parameter
    Menu scrolling and
    activation of defrost
    function
    (Parameter programmable
    H31)
    DOWN
    Decrease in value of
    parameter
    Menu scrolling and
    activation of associated
    function
    (Parameter programmable
    H32)
    MACHINE STATUS MENU
    The ‘machine status menu’ contains the
    folders and basic information on the
    device:
    -AL: alarm folder
    -SEt: Set point setting folder
    -Pb1: ‘probe 1 value’ folder
    -Pb3: ‘probe 3 value’ folder
    set
    Access to different levels of
    menu
    Alarm display, set
    point and probes
    Access to programming of
    parameters
    fnc
    Exit current level of
    menu
    Confirmation of value of para-
    meter
    (Parameter programmable
    H33)
    If no alarms are present, the “SEt” label
    is displayed. From here, you can scroll
    down the other menu items using the
    UP’ and ‘DOWN’ buttons.
    Each folder can be accessed by pressing
    the ‘set’ button once. Values are
    modified using the ‘UP’ and ‘DOWN’
    buttons and the ‘set’ button that
    confirms the selected value and takes
    you back to the higher level.
    Setting the set point
    Access the ‘machine status menu’. If no
    alarms are present, the “SEt” label is
    displayed. By pressing and immediately
    releasing the ‘set’ button, the set point
    value can be set using the UP’ and
    ‘DOWN’ buttons. Press and release the
    ‘set’ button again or press the ‘fnc’
    button to go back to the main menu
    level. The set point setting folder is also
    closed when the time-out elapses.
    PASSWORD
    The passwords “PA1and “PA2” are used
    to access level 1 and level 2 parameters.
    To change them and assign them the
    desired value, access the ‘parameter
    programming menu’ in the “diS” label
    folder.
    SIGNAL LED
    The status of the external devices, functions
    and controllers is described by the device
    LEDs.
    LED
    Description
    Indication
    The password is requested:
    - PA1 when entering the ‘parameter
    programming menu’;
    - PA2 in the “Cnf” folder containing the
    level 1 parameters.
    reduced set point
    Lights up when
    inserted
    LED set point is dis-
    played, blinking
    when reduced set
    point is inserted
    compressor LED
    ‘on’ with LED on.
    Blinking for delay,
    protection or acti-
    vation blocked
    USING COPY CARD
    The Copy card function can be used to
    upload and download parameter maps
    of one or more of the same type of
    instrument.
    The accessory is connected to the device
    using the special TTL serial port on the
    instrument. The Copy card can be used
    for the following functions:
    defrost LED
    ‘on’ during defrost-
    ing. Blinking when
    activated manually
    or by digital input
    alarm LED
    ‘on’ if alarm is pre-
    sent. Blinking for
    silenced
    alarm decimal point
    ‘on’ to indicate of
    voltage when on
    stand-by and dis-
    play ‘off’
    Alarm on
    If an alarm condition exists when the
    Machine Status menu is accessed the
    “ALfolder label appears.
    Upload (UL)
    : The upload function reads
    the instrument parameters and writes
    them onto the Copy card
    Download(dL)
    : The download function
    writes the parameter map that is on the
    copy card at that time onto the
    instrument memory.
    NOTE:
    Upload = instrument—-> Copy card
    Download = Copy card —> instrument
    The operations are performed by
    accessing the folder with the ‘FPr’ label
    and selecting the ‘UL’, ’dL’ or ‘Fr’
    commands. The operation is confirmed
    by pressing the ‘set’ button. If the
    operation is successful, a “y” is displayed
    whereas if it is unsuccessful an “n” will
    be displayed.
    Formatting the copy card
    This function is necessary when using the
    copy card for uploading for the first
    time or when using the copy card on
    device models that are not compatible.
    NOTE: formatting deletes all the data
    on the Copy card and cannot be
    undone.
    Download from reset
    Once the copy card has been connected
    the instrument is switched on. When the
    lamp test is over, one of the following
    two labels will be displayed for 5
    seconds:
    - dLY if the operation is successful
    - label DLn if operation fails The display
    will then go into default position (probe
    or set point).
    NOTE: after downloading, the
    instrument will begin to work with
    the new parameter map that has just
    been downloaded.
    closed.
    The ‘+’ sign indicates that the input is
    activated when the contact is open
    If several alarms are activated at the
    same time, they are displayed alternately
    for 2 seconds each. An error condition
    in the room probe leads to:
    - E1 code appears on display
    - activation of compressor as indicated
    by Ont and OFt
    - deactivation of maximum and
    minimum alarm controller.
    LIGHT CONTROLLER
    Controls the light relay. The function can
    be started in two different ways. If you
    press the light button the light relay is
    switched on if it was off and is switched
    off if it was on.
    The light status is recorded by the
    device as soon as the button is pressed
    so that when power is restored after a
    black-out the device can continue to
    operate in the same way as before the
    power failure.
    The following parameters control how
    the light works:
    MINIMUM AND MAXIMUM
    TEMPERATURE
    ALARM
    The alarm is regulated on the room
    probe. The temperature limits are
    defined by parameters HAL and LAL. The
    limits refer to the set point if parameter
    Att=1 and are absolute if Att=0.
    NOTE: If the alarms are relative, the
    parameter HA1 is set to positive
    values and LA1 to negative values.
    Par
    Description
    H06
    Button/aux input/door switch light active
    when instrument off
    dSd
    Enabling light relay by door switch
    dLt
    Delay Light Relay
    deactivation delay
    Att=0
    absolute
    Maximum temperature alarm
    room probe temperature

    HAL
    OFL
    Light switch always disables light relay
    OAO
    Alarm signal delay after
    disabling the digital input
    (door closed)
    Minimum temperature alarm
    room probe temperature

    LAL
    tdO
    Time out door open.
    Time out signal after activation of D.I.
    (door open)
    Att=1
    relative
    Maximum temperature alarm
    room probe temperature

    Set + HAL
    H11
    Digital output configurability/polarity 1
    Minimum temperature alarm room
    probe temperature

    Set + LAL
    H21...H25
    Digital output configurability 1...5
    The configuration of these parameters
    controls the status of the light relay by
    using the digital input as well as the
    normal button.
    The parameter dSd automatically
    switches on the light relay when the
    digital input is enabled and switches it
    off when the digital input is disabled
    following the delay set by parameter dLt.
    Parameter H06 activates the light button
    and enables the relay when the door is
    open even when the instrument is
    powered but is ‘off’.
    The dedicated button always deactivates
    the light relay even if the digital input is
    on or during the dLt delay only if the
    parameter OFL=Y.
    ALARM WITH THRESHOLD REFERRING
    TO PROBE 3
    An alarm is associated with probe 3 that
    refers to a threshold that is reset at a
    specified differential.
    By setting parameter PbA=3 probe 3 will
    signal a high or low temperature alarm
    for exceeding the set value.
    Signal
    Description
    AH3
    High temperature alarm
    AL3
    Low temperature alarm
    ADVANCED FUNCTIONS
    DOOR SWITCH INPUT
    This is a clean contact digital input with
    programmable polarity. The door switch
    input functions are controlled by the
    values of the following parameters:
    The alarm is handled in the same way as
    the other temperature alarms and
    standard signal delays are used.
    EXTERNAL ALARM
    It is set if the digital input is enabled
    with the delay specified by parameter
    dAd and remains enabled until the next
    time the digital input is deactivated. The
    alarm consists of an alarm LED that
    remains on, activation of a buzzer and
    deactivation of all the device loads (if
    specified by the EAL parameter).
    If an external alarm is present the EA
    label is displayed in the AL folder.
    DIAGNOSTICS
    Par
    Description
    dOd
    Digital input switches off loads
    PROBE ALARMS
    When one of the probes is outside the
    nominal operating range or the probe is
    open or has shorted, an alarm is
    generated if at least one of these
    conditions persists for at least 10
    seconds.
    If at least one of these 3 alarms is
    signalled the alarm LED and relay are
    enabled. When activated code E1
    appears on the display.
    dAd
    D.I. activation delay
    OAO
    Alarm signal delay after dis-
    disabling the digital input (door closed)
    tdO
    Time out door open. Time out
    signal after activation of D.I.
    (door open)
    H11
    Digital output configurability/polarity 1
    H21...H25
    Digital output configurability 1...5
    Parameter H11 is used to configure the
    door switch input with values between
    -8 and +8. Positive and negative values
    are present in order to select the
    polarity assigned to the input and:
    NOTE: the sign “-” indicates that the
    input is activated when the contact is
    Signal
    Description
    EA
    External alarm
    It is reset the next time the digital input
    is deactivated and the buzzer can be
    manually silenced.
    Signal
    Description
    E1
    Faulty room probe
    E3
    Faulty display probe
    EWDR 981
    2/8
     OPEN DOOR ALARM
    This alarm is generated when the door is
    open for longer than the value specified
    in parameter tdO. The door open alarm
    is signalled in the alarm folder (AL) and
    the LED and alarm relay are switched on.
    The OPd label is also displayed.
    CONDITIONS OF USE
    ELECTRICAL
    CONNECTIONS
    PERMITTED USE
    For safety reasons the instrument must
    be installed and used in accordance with
    the instructions supplied.
    Users must not be able to access parts
    with dangerous voltage levels under nor-
    mal operating conditions. The device
    must be suitably protected from water
    and dust depending on the specific
    application and only be accessible using
    special tools (except for the front key-
    pad).
    The device is ideally suited for house-
    hold use and/or similar use in the refrig-
    eration sector and has been tested with
    regard to safety in accordance with the
    European harmonized reference stan-
    dards. It is classified as follows:
    • as an automatic electronic control
    device to be independently mounted as
    regards its construction;
    • as a 1 B type operated control device
    as regards its automatic operating fea-
    tures;
    • as a Class A device as regards the cate-
    gory and structure of the software.
    Warning! Always switch off machine
    before
    working
    on
    electrical
    connections.
    The instrument has screw terminal blocks
    for connecting cables with a maximum
    diameter of 2.5 mm
    2
    (only one conductor
    per terminal block for power
    connections): for terminal capacity, see
    the label on the instrument.
    The relay outputs are voltage free.
    Do not exceed the maximum current
    allowed. For higher loads, use a suitable
    contactor.
    Make sure that the power voltage
    complies with the device voltage.
    Probes have no connection polarity and
    can be extended using an ordinary
    bipolar cable (note that if probes are
    extended this affects the electromagnetic
    compatibility (EMC) of the instrument:
    special care must be used when wiring).
    Signal
    Description
    OPd
    Open door alarm
    The relay can be deactivated by pressing
    the silencing button. The LED continues
    to flash intermittently and the OPd label
    remains in the alarm menu until the
    door is closed.
    MECHANICAL
    ASSEMBLY
    The EWDR 981 is designed to be wall-
    mounted (removable brackets) or
    mounted on DIN rail (Omega 3). The
    unit operates correctly with an ambient
    temperature range of between -5 and 55
    °C. Units must not be installed in
    excessively humid and/or dirty locations.
    The TTL serial cable must be kept
    separate from the power cables.
    TECHNICAL DATA
    Casing: plastic 4 Din modules
    Dimensions: front 70x85 mm, depth
    61mm.
    Mounting: on DIN rail (Omega 3) or
    wall-mounted.
    Connections: on screw terminal block for

    2.5mm
    2
    conductors
    (only one conductor per terminal block
    for power connections)
    Operating temperature: -5...55°C.
    Storage temperature: -30...85°C.
    Operating and storage ambient humidity:
    10...90 % RH (non-condensing).
    Display: 3 digits + sign
    Analogue inputs: 2 NTC/PTC inputs
    (parameter configurable)
    Digital inputs: 2 voltage-free parameter-
    configurable digital inputs.
    Serial: TTL for Copy Card
    Digital outputs: 1 on relay:
    16A 1hp 250V SPDT;
    Configurable 12V
    UNPERMITTED USE
    The use of the unit for applications
    other than those described above is for-
    bidden. It should be noted that the relay
    contacts supplied with the device are
    functional and therefore exposed to
    potential faults. Any protection devices
    required to comply with product
    requirements or dictated by common
    sense due to obvious safety reasons
    should be installed externally.
    RESPONSIBILITY AND RESIDUAL RISKS
    Eliwell shall not be liable for any damages deriving from:
    - installation/use other than that prescribed and, in particular, which does not comply
    with the safety standards specified in the regulations and/or those given herein;
    - use on boards which do not guarantee proper protection against electric shock, water
    or dust when assembled;
    - use on boards which allow dangerous parts to be accessed without the use of tools;
    - tampering with and/or alteration of the product;
    - installation/use on boards that do not comply with the standards and regulations in
    force.
    /24mA output
    Resolution: 1 or 0.1°C.
    Accuracy: better than 0.5% of bottom
    scale +1 digit
    Consumption: 5VA
    Power supply: 230Va
    c
    EWDR 981
    3/8
    PAR.
    DESCRIPTION
    RANGE
    DEFAULT
    VALUE
    LEVEL
    U.M.
    SEt
    Set point with range falling between the minimum
    LSE set point and the maximum HSE set point. The
    set point value is in the
    machine status menu
    menu
    LSE...HSE
    0.0
    °C/°F
    diF
    When the compressor stops when it reaches the
    set point value, it restarts at a value corresponding
    to the set point plus the value of the differential It
    must not be 0
    0.1...30.0
    2.0
    1-2
    °C/°F
    HSE
    Maximum set point value
    LSE...302
    50.0
    1-2
    °C/°F
    LSE
    Minimum set point value
    -58.0...HSE
    -50.0
    1-2
    °C/°F
    OSP
    Offset point. Value to be added to set point if
    reduced set point is activated Economy function).
    -30.0...30.0
    0
    2
    °C/°F
    Cit
    Minimum compressor ON time. Minimum time for
    activating a compressor before deacti vation Not
    active if=0
    0...250
    0
    2
    min
    CAt
    Maximum compressor ON time. Maximum time for
    activating a compressor before deacti vation Not
    active if=0
    0...250
    0
    2
    min
    Ont (1)
    Compressor activation time if probe is faulty. If set
    to 1 with OFt=0 the compressor always remains on
    whereas if OFt>0 it operates in duty cycle mode
    (see
    Duty Cycle
    diagram)
    0...250
    0
    1-2
    min
    OFt (1)
    Compressor shut-down time if probe is faulty. If set
    to 1 with Ont=0 the compressor always remains off
    whereas if OFt>0 it operates in duty cycle mode
    (see
    Duty Cycle
    diagram)
    0...250
    1
    1-2
    min
    dOn
    Delay in activating compressor relay after start-up
    0...250
    0
    1-2
    sec
    dOF
    Delay after shut-down; between compressor relay
    shut-down and subsequentstart-up the specified
    time must elapse.
    0...250
    0
    1-2
    min
    dbi
    Delay between switch-ons; the specified time must
    elapse between two subsequent switch-ons
    0...250
    0
    1-2
    min
    OdO
    Delay in activating outputs after start-up of instru-
    ment or after a power failure.
    Not active if=0
    0...250
    0
    1-2
    min
    dty
    Type of defrost.
    0 = electrical defrosting;
    1 = cycle reversing defrosting (hot gas);
    2 = Free mode defrosting (compressor disabled).
    0/1/2
    0
    1-2
    num
    dit
    Period of time elapsing between the start of two
    defrosts 0=function disabled
    0...250
    6h
    1-2
    hours/min/sec
    dt1
    Unit of measurement for defrost
    times (par. dit)
    0/1/2
    0
    2
    num
    0=”dit” expressed in hours
    1=”dit” expressed in minutes
    2=”dit” expressed in seconds
    dt2
    Unit of measurement for duration of defrosting
    (dEt parameter)
    0= “dEt” parameter expressed in hours
    1= “dEt” parameter expressed in minutes
    2= “dEt” parameter expressed in seconds
    0/1/2
    1
    2
    num
    dCt
    Selection of defrosting time count mode.
    0=compressor operating hours DIGIFROST®
    method). Defrosting active only if compressor is
    on.
    1 = device operating hours; defrost counting is
    always active when the machine is on
    2=compressor stop Each time the compressor
    stops a defrosting cycle
    defrost cycle is performed according to par. dtY
    3=disabled
    0/1/2/3
    1
    1-2
    flag
    dOH
    Delay between start of first defrosting operation
    and start-up of instrument.
    0...59
    0
    1-2
    min
    dEt
    Defrosting time-out; determines maximum dura-
    tion of defrosting.
    1...250
    30min
    1-2
    min/sec
    NOTE: At level 1 the folders will only display all the level 1 parameters. At level 2 the folders will only display all the level
    2 parameters. The symbol 1-2 indicates the parameters that are displayed at both menu levels
    EWDR 981
    4/8
    PAR.
    DESCRIPTION
    RANGE
    DEFAULT
    VALUE*
    LEVEL**
    U.M.
    dPO
    Determines when instrument starts up if
    the defrosting cycle must be activated (if the
    temperature on the evaporator allows this)
    y=defrosting activated at start-up
    n=defrosting not activated at start-up
    n/y
    n
    1-2
    flag
    tcd
    minimum time for each compressor state
    before defrosting “Ontime if >0; “Offtime if >0
    -31...31
    0
    2
    min
    Cod
    Compressor “Off” time before defrost cycle.
    The compressor is not turned on if a defrost cycle
    is expected in the time indicated by the parameter.
    0=Function excluded
    0...60
    0
    2
    min
    dt
    Dripping time
    0...250
    0
    1-2
    min
    Att
    Determines if “LAL” and “HAL” are expressed as
    absolute values or as a differential related to the
    set point
    0=absolute value
    1=value related to set point
    0/1
    0
    2
    flag
    AFd
    Alarm differential
    1.0...50.0
    2.0
    1-2
    °C/°F
    HAL (2)
    Maximum alarm. Temperature limit (whose
    absolute or relative value status is regulated by
    “Att”) above which the alarm is activated.
    LAL...150.0
    50.0
    1-2
    °C/°F
    LAL (2)
    Minimum alarm. Temperature limit (whose
    absolute or relative value status is regulated by
    “Att”) below which the alarm is activated.
    -50.0...HAL
    -50.0
    1-2
    °C/°F
    PAO (3)
    Alarm exclusion time after start-up of instrument
    following a power failure
    0...10
    0
    1-2
    hours
    dAO
    Alarm exclusion time after defrosting
    0...999
    0
    1-2
    min
    OAO
    High and low temperature alarm delay after
    disabling digital input
    (door closed)
    0...10
    0
    2
    hours
    tdO
    Time out after alarm signal when
    digital input is
    0...250
    0
    2
    min
    disabled (door open)
    tAO (3)
    Temperature alarm delay time
    0...250
    0
    1-2
    min
    EAL
    External alarm to lock controllers
    n=does not lock,
    y=locks
    n/y
    n
    2
    flag
    AOP
    Polarity of alarm output:
    0 = alarm active and output disabled;
    1 = alarm active and output enabled
    0/1
    1
    2
    flag
    PbA
    Configuration of temperature alarm on
    probe 1 and/or 3:
    0=on probe 1 (thermostat control)
    1=on probe 3 (display)
    2=on probe 1 and 3 (thermostat control and display)
    3=on probe 1 and 3 (thermostat control and display)
    on external threshold
    0/1/2/3
    0
    2
    num
    SA3
    Probe 3 alarm set point
    -50.0...150.0
    50
    2
    °C/°F
    dA3
    Probe 3 alarm differential
    -30.0...30.0
    2.0
    2
    °C/°F
    dSd
    Light relay enable from door switch.
    n = door open, light does not turn on;
    y = door open, light turns on (if it was off)
    flag
    n/y
    y
    2
    dLt
    Light relay disabling delay after closing
    door if “dSd”=y
    0...31
    0
    2
    min
    OFL
    Light relay disabled even if disabling delay
    “dLt” is active
    n/y
    n
    2
    flag
    dOd
    Digital input switches off loads
    n/y
    n
    2
    flag
    dAd
    Delay in activating digital input
    0...255
    0
    2
    min
    NOTE: At level 1 the folders will only display all the level 1 parameters. At level 2 the folders will only display all the
    level 2 parameters. The symbol 1-2 indicates the parameters that are displayed at both menu levels
    EWDR 981
    5/8
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