ID 974LX
electronic controllers for  ventilated refrigeration units
KEYS
UP Button DOWN button fnc button Set button
fnc set
Scrolls through the menu items Scrolls through the menu items ESC function (quit) Accesses the set point
Increases the values Decreases the values Parameter programmable Accesses the Menus
Activates manual defrosting Parameter programmable (see H33 parameter) Confirms the commands
Parameter programmable (see H32 parameter) Displays the alarms (if active)
(see H31 parameter)
buttons you can scroll through the other PROGRAMMING MENU
USER INTERFACE
folders in the menu: (See Programming Menu Diagram)
The user has a display and four buttons
-AL: alarm folder (if alarms present, except 1) Displaying parameters
that can be used to control the status of
for faulty probes/probe errors; To access the Programming menu, hold
the device and program it. At start-up the
-SEt: Setpoint setting folder. the  set button for more than 5 seconds.
device runs a Lamp Test; and the display
-Pb1: probe 1 value folder; If specified, the level 1 access PASSWORD
and LEDs flash for a few seconds to check
-Pb2: Probe value folder 2 - If present will be requested (see parameter  PA1 )
that they are working correctly. The device
(parameter H42=y). and (if the password is correct) the label
has two main menus: Machine Status and
of the first folder will appear. If the pass-
Programming.
Set setting word is incorrect, the display will show the
ACCESSING AND USING MENUS Access the  Machine Status menu, press PA1 label again.
Resources are arranged in a menu that can the  set button and quickly release it. The When the device is in standby, it is possi-
be accessed by pressing and quickly releas-  Set folder label appears. To display the ble to program parameters regardless of
ing the  set button (Machine Status Set point value, press the  set button whether the display is on or off.
menu) or by holding the  set button again. Use the  UP and  DOWN buttons to
down for more than 5 seconds The Set point value appears on the display. scroll through the other folders;
(Programming menu). To change the Set point value, use the NOTE: at this point, level 2 parameters
To access the contents of each folder indi-  UP and  DOWN buttons within 15 sec- are NOT visible.
cated by the relevant label, just press the onds.
 set button once. If the parameter is LOC = y the Set point
You can now scroll through the contents cannot be changed. 2) Displaying level 2 parameters
of each folder, modify it or use its func- Go to the  CnF folder in the Programming
tions. Alarm on Menu and scroll down the parameters until
If the keyboard is not used for more than If an alarm condition exists when the you reach the PA2 label. By pressing the
15 seconds (timeout) or the  fnc button Machine Status menu is accessed the  AL  set button, all the parameters will be dis-
is pressed once, the last value shown on folder label appears (see section on played including the level 2 parameters
the display is confirmed and the display  Diagnostics ). and the label of the first folder in the pro-
returns to the previous screen. Displaying probes gramming menu will appear.
MACHINE STATUS MENU If you press the  set button when the Level 2 parame n be protected by a sec-
(See Machine Status Menu Diagram) corresponding label appears, the value of ond password (see  PA2 parameter in the
To access the Machine Status menu, press the probe associated with it is displayed.  diS folder, which is different from the
the  set button and quickly release it. PA2 label in the  CnF folder). If specified,
If no alarms are present, the label  SEt level 2 parameters are not visible to the
appears. By using the  UP and  DOWN user. To access the  CnF folder, users will
have to insert the level 2 access PASS-
WORD. If the correct password is entered,
LEDs
the label of the first folder in the pro-
Position Associated function Status
gramming menu displays.
To open the folder, press  set . The label
of the first visible parameter will appear.
Compressor or relay 1 ON for compressor on; blinking
To scroll through the other parameters,
for protection delay or enabling blocked
Defrosting ON when defrosting in progress; blinking when activated
manually or by digital input
Alarm ON for active alarm; blinking for silenced alarm
Fans ON when fan is on
rel. 8/06 -GB-
cod. 9IS42067
use the  UP and  DOWN buttons. To NOTE: 0 = electrical defrosting; the compressor is
change the parameter, press and release " UPLOAD: instrument --> Copy Card turned off.
 set , then set the desired value using the " DOWNLOAD: Copy Card --> istr. 1 = cycle reversing defrosting (hot gas);
 UP and  DOWN buttons and confirm These operations can be performed by the compressor continues operating.
with the  set button. Move on to the next accessing the folder with the  FPr label 2 = Free mode defrosting.
parameter. and selecting the  UL ,  dL or  Fr com- (defrosting irrespective of state
PLEASE NOTE: We strongly recommend mands. The operation is confirmed when of compressor)
that you switch the device off and on you press the  set button. If the opera-
again after changing the configuration of tion is successful, a  y is displayed where-
parameters to prevent configuration prob- as if it is unsuccessful an  n will be dis-
lems and/or ongoing timings. played. DIAGNOSTICS
Download  from reset
PASSWORD Connect the copy card with the instrument The alarm signal generated by a faulty
Passwords  PA1 and  PA2 allow level 1 OFF. thermostat control probe (probe 1), is dis-
and level 2 parameters to be accessed. Programming parameters are downloaded played as E1.
There are no passwords in the standard when the device is switched on. At the end The alarm signal generated by a faulty
configuration. To enable them and assign of the lamp test, the following messages evaporator probe (probe 2) is displayed as
the desired values to them, open the are displayed for about 5 seconds: E2.
Programming menu in the  diS folder " label dLY if copy operation is successful
Table of faulty probes
(0=disabled): " label DLn if operation fails
DISPLAY
FAULT
If passwords are enabled, they will be PLEASE NOTE:
E1
Faulty probe 1 (thermostat control)
requested: " After the parameters have been down-
E2
Faulty probe 2 (evaporator)
- Use PA1 to open the Programming menu loaded, the device uses the downloaded
(see the  Programming Menu section); parameter map settings.
- Use PA2 in the  Cnf folder containing An error condition in probe 1 (thermostat
the level 1 parameters. KEYBOARD LOCKED control) causes the following:
Keyboard operating can be locked by pro- " E1 code appears on display
ACTIVATING MANUAL DEFROST CYCLE gramming the  Loc parameter (see folder " compressor is activated as indicated by
To enable the defrost cycle manually, press with  diS table). If the keyboard is locked  Ont and  Oft parameters if these are
the  UP button (if configured =1) for 5 you can access the Programming Menu by programmed for duty cycle or:
seconds. pressing the  set button.
Ont Oft Compressor output
If the defrost conditions are not correct The Set point can also be displayed.
0 0 OFF
(the temperature of the evaporator probe
0 >0 OFF
>0 0
is higher than the end of defrost tempera- ON
ADVANCED FUNCTIONS
>0 >0 dc
ture, for example) or parameter OdO<>0,
DOOR SWITCH INPUT
the display will flash three (3) times to
indicate that the operation will not be per- This is a clean contact digital input with Other alarms do not display on the device,
formed. programmable polarity. but are visible in the  Machine Status
menu under the  AL folder.
The door switch input functions are con-
USING THE COPY CARD The maximum and minimum temperature
trolled by the values of the following para-
The Copy Card is an accessory connected alarm is regulated by the thermostat con-
meters:
to the TTL serial port used for quick pro- trol probe (probe 1). The temperature lim-
Par Description
gramming of the unit parameters (upload its are defined by the  HAL (maximum
dOd Digital input switches off loads
and download parameter map to one or alarm) and  LAL (minimum alarm) para-
dAd Delay of D.I. enabling
more units of the same type). Operations OAO Alarm signal delay after dis Enabling the meters.
digital input
are described below:
(door closed
Fr-Format (level 2 parameter) MAXIMUM AND MINIMUM TEMPERA-
tdO Time out door open. Time out
This command can be used to format the signalled when D.I is enabled TURE ALARM
(door opened).
copy card. This operation must be per- If an alarm condition occurs and alarm
ìH11 Configurability of digital input/polarity 1
formed when it is used for the first time exclusion times are active (see alarm
H21...H23 Digital output configurability 1...3
or used with models that are not compati- exclusion parameters), the alarm icon
ble. Parameter H11 is used to configure the lights up permanently and the relay that is
Warning: When the copy card has been digital input with values between configured as an alarm is enabled. This
programmed, all the data entered is can- -5 and +5. Positive and negative values type of alarm does not affect the regulat-
celled when the  Fr parameter is used. enable you to select the polarity assigned ing in progress.
This operation cannot be undone. to the input and: Alarms are considered as absolute
UL-Upload " The  - sign indicates that the func- (default) values or as values related to the
This operation unloads the programming tion is active with closed contact Set point (the distance from the Set point
parameters from the instrument. " The  + sign indicates that the func- itself) and based on the Att parameter. If
dL-Download tion is active when the contact is open the alarms are relative (Att=1), the para-
This operation downloads the program- meter HA1 is set to positive values and
ming parameters to the instrument. DEFROST CONTROL LA1 to negative values.
The device can be used to select different This alarm condition can be viewed in the
types of defrost cycles with the parameter folder  AL with labels  AH1-AL1 .
dty, defrost type.
(defrost execution mode).
The dty parameter can have these values:
ID 974LX 2/7
MODEL with Switching power supply:
MECHANICAL
DEFROST ALARM
Digital outputs: 3 outputs on relays:
If the defrost stops due to a timeout
" (A) first output SPDT 8(3)A 250Va,
ASSEMBLY
(instead of being stopped by the detection
" (B) second output SPST 3A 250Va,
The unit has been designed for panel-
of the end defrost temperature), an alarm
" (C) third output SPST 11A 250Va.
mounting. Drill a 29x71 mm hole, insert a
is generated and the icon lights up.
Consumption: 3W max.
tool and fix it in place with the brackets
This condition can be viewed in the  AL
Power Supply: 95...240Va Ä…10%
provided.
folder with the label  Ad2 . Automatic
back swinging occurs when the next
Do not install the devices in excessively
Warning: check the power supply specified
defrost starts.
humid and/or dusty locations. These
on the instrument label; for information
By pressing any button during the alarm devices are designed to be used in loca-
on relay capacity and power supplies con-
condition, the signal light disappears. In tions with ordinary pollution levels
tact the Sales Office).
order to cancel the alarm properly, you Always make sure that the area next to the
must wait until the next defrost. instrument cooling slits is adequately ven-
OPEN DOOR ALARM tilated.
If a door is open, the Open Door alarm is
signalled in response to a delay defined by
TECHNICAL DATA
the tdO parameter.
CONDITIONS OF USE
The alarm is signalled by the flashing alarm
Front protection: IP65.
icon. PERMITTED USE
Casing: PC+ABS UL94 V-0 resin plastic
This alarm condition can be viewed in the
For safety reasons the instrument must be
body, polycarbonate front, thermoplastic
 AL folder with the label  Opd . installed and used in accordance with the
resin buttons.
instructions supplied. Users must not be able to
NOTE: Do not set parameter tAo to
Dimensions: front 74x32 mm, 60 mm
access parts with dangerous voltage levels
zero when the door is closed since if
depth. (depth 68 mm only for ID 974
under normal operating conditions.
the door is continually opened and
switching)
The device must be suitably protected from
closed, any alarms would never be sig- Mounting: and to be installed on panels
water and dust according to the specific appli-
nalled.
with a 71x29 mm drilling template (+0.2/-
cation and only be accessible using special tools
0.1 mm).
ELECTRICAL (except for the front keypad).
Operating temperature:  5& 55°C.
The device can be fitted to equipment for
CONNECTIONS
Storage temperature: -30& 85°C
household use and/or similar use in the refrig-
Warning! Always switch off machine Usage ambient humidity: 10& 90 % RH
eration sector and has been tested with regard
before working on electrical connec- (non-condensing).
to safety in accordance with the European har-
tions. Storage ambient humidity: 10& 90% RH monized reference standards:
The instrument has screw terminals for (non-condensing).
It is classified as follows:
connecting electrical cables with a maxi- Display range:  50& 110 (NTC);  55& 140
mum diameter of 2.5 mm2 (only one con- (PTC) °C without decimal point (parameter
" according to its manufacture: as an automatic
ductor per terminal for power connec- selectable) on display 3 ? digits + sign.
electronic control device to be incorporated;
tions): for terminal capacity, see the label Analogue inputs: 2 PTC or NTC inputs
" as a 1 B type operated control device as
on the instrument. (parameter selectable).
regards its automatic operating features;
In the model ID 974 LX with Switching Digital inputs: 1 voltage-free parameter-
" as a Class A device as regards the category
power supply only one voltage free relay configurable digital input.
and structure of the software.
output is present, on all other models on Serial: TTL for connection to Copy Card
the contrary all relay outputs are voltage and Televis System.
UNPERMITTED USE
free. Digital outputs: 3 outputs on relays:
The use of the unit for applications other than
Do not exceed the maximum current " (A) SPDT 8(3)A 250Va
those described above is forbidden.
allowed.
" (B) SPST 8(3)A 250Va
It should be noted that the relay contacts sup-
For higher loads, use a suitable contactor. plied with the device are functional and there-
" (C) SPST 5(2)A 250Va
fore exposed to potential faults. Any protection
Make sure that the power voltage com- Measurement range: from  55 to 140°C.
devices required to comply with product
plies with the device voltage. Accuracy: better than 0.5% of bottom scale
requirements or dictated by common sense due
Probes have no connection polarity and +1 digit.
to obvious safety reasons should be installed
can be extended using an ordinary bipolar Resolution: 1 or 0.1 °C.
externally.
cable (N.B. extending the probes affects
Consumption: 1,5 VA (model 12Va/c ) /
the electromagnetic compatibility (EMC) of
3 VA (model 230Va) / 3W (model switch-
the device. special care must be used ing)
when wiring).
Power supply: 230Va or 12 Va/c Ä…10%
Probe cables, power supply cables and the 50/60 Hz (see also in other models)
RESPONSIBILITY AND
TTL serial cable should be kept separate
RESIDUAL RISKS
VERSION WITH COMPRESSOR RELAY
from power cables.
15(8)A 1 hp
Eliwell Controls S.r.L. shall not be liable for any
damages deriving from:
Digital outputs: 3 outputs on relays:
" installation/use other than that prescribed
and, in particular, which does not comply with
" (A) SPDT 8(3)A 250Va
the safety standards specified in the regulations
" (B) SPST 8(3)A 250Va
and/or those given herein;
" (C) SPST 15(8)A 250Va
" Use on boards which do not guarantee ade-
Consumption: 3 VA.
quate protection against electric shock, water
Power supply: 12 Va/c Ä…10% 50/60 Hz
or dust when assembled.
" Use on boards which allow dangerous parts
to be accessed without the use of tools.
NOTE: The technical characteristics in this document concerning measurements
" tampering with and/or alteration of the
(range, accuracy, resolution, etc.) refer to the instrument in the strictest sense
product;
and not to any accessories provided such as probes, for example.
" installation/use on boards that do not com-
This means, for example, that an error introduced by the probe is added to any ply with the standards and regulations in force.
error that is typical of the device.
ID 974LX 3/7
Tab. 1 Table of parameters
PAR. DESCRIPTION RANGE DEFAULT VALUE* LEVEL** U.M.
COMPRESSOR CONTROLLER (folder with  CP label)
diF diFferential. Compressor relay intervention differential; the compressor stops when the Set 0.1...30.0 2.0 1 °C/°F
point value is reached (as indicated by the control probe), and restarts at temperature
value equal to the Set point plus the value of the differential. Note: the value 0 cannot be
assumed.
HSE Higher SEt. Maximum possible set point value. LSE..302 99.0 1 °C/°F
LSE Lower SEt. Minimum possible set point value. -55.0...HSE -50.0 1 °C/°F
OSP Offset SetPoint. Temperature value to be added algebraically to the set point if reduced set -30.0...30.0 0 2 °C/°F
enabled (Economy function). It can be enabled from the digital output or a specially con-
figured button.
Cit Compressor min on time. Minimum compressor activation time before disabling. If set at 0 0...250 0 2 min
it is not active.
CAt Compressor mAx on time. Maximum compressor activation time before disabling. If set at 0...250 0 2 min
0 it is not active.
dOd digital (input) Open door. Digital input switches off loads. y = yes; n = no. n/y n 2 flag
Valid for parameter H11 = Ä…4 (door microswitch).
dAd digital (input) Activation delay. Delay in enabling digital input. 0& 255 0 2 min
COMPRESSOR PROTECTIONS (folder with  CP label)
Ont On time (compressor). Compressor activation time in the event of a faulty probe. If set to 0...250 0 1 min
 1 with Oft at  0 the compressor is always on whereas if OFt >0 it operates in duty cycle
mode.
OFt OFF time (compressor). Compressor in disabled state time in the event of a faulty probe. If 0...250 1 1 min
set to  1 with Oft at  0 the controller is always off whereas if Ont >0 it operates in duty
cycle mode.
dOn delay (at) On compressor. Delay time in activating the compressor relay after switch-on of instrument. 0...250 0 1 sec
dOF delay (after power) OFF. Delay after switch off; the indicated time must elapse between 0...250 0 1 min
switch-off of the compressor relay and the subsequent switch-on.
dbi delay between power-on. Delay between switch-ons; the indicated time must elapse 0...250 0 1 min
between two subsequent switch-ons of the compressor.
OdO delay Output (from power) On. Delay time in activating outputs after the start of the 0...250 0 1 min
device or after a power failure.
DEFROST CONTROLLER (folder with  dEF label)
dty defrost type. Type of defrost. .(see Par.dCt table) 0/1/2 0 1 flag
0 = electrical defrosting;
1 = cycle reversing defrosting (hot gas);
2 = Free mode defrost (regardless of compressor).
dit defrost interval time. Period of time between the start of two defrost operations. 0...250 6 1 hours
0= function disabled (defrost is NEVER performed)
dt1 defrost time 1. Unit of measurement for defrost times ( dit parameter). 0/1/2 0 2 flag
0 =  dit parameter expressed in hours.
1 =  dit parameter expressed in minutes.
2 =  dit parameter expressed in seconds.
dt2 defrost time 2. Measure unit for defrosting duration ( dEt parameter). 0/1/2 1 2 flag
0 =  dEt parameter expressed in hours.
1 =  dEt parameter expressed in minutes.
2 =  dEt parameter expressed in seconds.
dCt defrost Counting type. Selection of defrost time count mode. 0/1/2 1 1 flag
(see Par.dCt table)
0 = Hours of operation of compressor (DIGIFROST® method)
1 = Hours of operation of device
2 = compressor stop.
dOH defrost Offset Hour. Start-of-defrost delay time from start up of instrument. 0...59 0 1 min
dEt defrost Endurance time. Defrosting time-out; determines maximum duration of defrosting. 1...250 30 1 min
dSt defrost Stop temperature. Defrosting end temperature (determined by evaporator probe). -50.0... 150 8.0 1 °C/°F
dPO defrost (at) Power On. Determines if the instrument must enable the defrost cycle at start- n/y n 1 flag
up (if the temperature measured by the evaporator allows this):
y = Yes; n = No.
tcd time compressor for defrost. Minimum time for compressor ON or OFF before defrost -31...31 0 2 min
Negative values: The compressor must stop (OFF) for the preset interval of time (before
defrost)  Positive values: The compressor must stay ON for the preset interval of time
(before defrost)
Cod Compressor off (before) defrost. Time for compressor OFF before defrost cycle. If a 0& 60 0 2 min
defrost cycle is set within the programmed time for this parameter, the compressor is not
started.
FAN CONTROLLER (folder with  FAn label)
FPt Fan Parameter type.  FSt parameter mode that can be expressed as an absolute tempera- 0/1 0 2 flag
ture value or as a value related to the Set point. 0 = absolute; 1 = relative.
FSt Fan Stop temperature. Fan stop temperature; a value read by the evaporator probe that is -50.0..150.0 2.0 1 °C/°F
higher than the set value causes the fans to stop.
Fot Fan on-start temperature. Fan start temperature; if the temperature read by the evaporator -50.0..150.0 -50.0 2 °C/°F
is lower than the value set for this parameter, the fans do not start.
FAd FAn differential. Fan activation intervention differential (see par.  FSt and  Fot ). 1.0& 50.0 2.0 1 °C/°F
Fdt Fan delay time. Delay time at fan start after a defrosting cycle. 0...250 0 1 min
dt drainage time. Dripping time. 0...250 0 1 min
dFd defrost Fan disable. Used to select the exclusion of the evaporator fans during defrost. y = n/y y 1 flag
Yes; n = No.
FCO Fan Compressor OFF. Used to select fan stop when compressor is switched OFF. n/y/dc y 1 flag
y = fans active (with thermostat; in response to the value read by the defrost probe, see
 FSt parameter);
n = fans off;
dc = duty cycle (using parameters  Fon and  FoF ).
Fod Fan off (with open) door. Fans on with open door. y = Yes; n = No. n/y n 2 flag
FdC Fan delay Compressor off. Fan switch off delay time after compressor stop. 0..99 0 2 min
ID 974LX 4/7
CP
dEF
FAn
PAR. DESCRIPTION RANGE DEFAULT VALUE* LEVEL** U.M.
Fon Fan on (in duty cycle). Time fans are ON in duty cycle. 0..99 0 1 min
Use of fans in duty cycle mode; valid for FCO = dc
FoF Fan oFF (in duty cycle). Time fans are OFF in duty cycle. 0..99 0 1 min
Use of fans in duty cycle mode; valid for FCO = dc
ALARMS (folder with  AL label)
Att Alarm type. Parameter  HAL and  LAL modes, as absolute temperature values or as dif- 0/1 0 2 flag
ferential compared to the Set point.
0 = absolute value; 1 = relative value.
AFd Alarm Fan differential. Alarm differential. 1.0...50.0 2.0 1 °C/°F
HAL Higher ALarm. Maximum temperature alarm. Temperature value (difference between the LAL...150.0 50.0 1 °C/°F
set point and the absolute value; see paragraph Att). If the upper limit is exceeded, the
alarm signal is enabled.
LAL Lower ALarm. Minimum temperature alarm. Temperature value (difference between the -50.0...HAL -50.0 1 °C/°F
set point and the absolute value; see paragraph Att). If the lower limit is exceeded, the
alarm signal is enabled.
PAO Power-on Alarm Override. Alarm exclusion time after the start of the device following a 0...10 0 1 hours
power failure.
dAO defrost Alarm Override. Alarm exclusion time after defrost. 0..999 0 1 min
OAO Output (door) Alarm Override. Temperature alarm signal delay time after the disabling of 0& 10 0 2 hours
the digital input (i.e. door closed).
tdO Time out door open. Alarm signal timeout after the disabling of the digital input (door 0& 250 0 2 min
open).
tAO temperature Alarm Override. Delay of temperature alarm signal. 0...250 0 1 min
dAt defrost Alarm time. Alarm signal for defrost stop due to timeout. n/y n 2 flag
n = Does not enable the alarm; y = Enables the alarm.
EAL External Alarm Lock. External alarm locks controllers; it locks the compressor controllers, n/y n 2 flag
defrost and fans if the digital input (configured as external alarm) is enabled. n = Does
not lock; y = locks.
AOP Alarm Output Polarity. Polarity of alarm output. 0/1 1 2 flag
0 = alarm active and output disabled;
1 = alarm active and output enabled.
COMMUNICATION (folder with  Add label)
dEA dEA = Device address in family (valid values from 0 to 14). 0...14 0 1 num
FAA FAA = Device family (valid values from 0 to 14)
Values FAA and dEA represent the device network address and are identified with 0...14 0 1 num
 FF.DD (where FF=FAA and DD=dEA).
DISPLAY (folder with  diS label)
LOC (keyboard) LOCK. Keyboard locked. However, you can still access the parameter pro- n/y n 1 flag
gramming menu and modify parameters including the status of this parameter to allow
keyboard unlocking. y = yes; n = no.
PA1 PAssword 1. When enabled (value is not 0) it represents the access key to level 1 para- 0...250 0 1 num
meters.
PA2*** PAssword 2. When enabled (value is not 0) it represents the access key to level 2 para- 0...255 0 2 num
meters.
ndt number display type. Display with decimal point. y = Yes; n = No. n/y y 1 flag
CA1 CAlibration 1. Calibration 1. Positive or negative temperature value added to the value -12.0...12.0 0 1 °C/°F
read by probe 1, based on  CA parameter settings.
CA2 CAlibration 2. Calibration 2. Positive or negative temperature value added to the value -12.0...12.0 0 1 °C/°F
read by probe 2, based on  CA parameter settings.
CA CAlibration Intervention. Offset intervenes on display, thermostat control or both. 0/1/2 2 2 num
0 = modifies the temperature displayed only;
1 = Changes the temperature used by regulators, not the temperature displayed, which
stays unchanged.
2 = Changes the temperature displayed that is also used by regulators.
LdL Low display Label. Minimum value the device is able to display. -55.0...302 -55.0 2 °C/°F
HdL High display Label. Maximum value the instrument is able to display. -55.0..302 140.0 2 °C/°F
ddL defrost display Lock. Display mode during defrosting. 0/1/2 1 1 num
0 = displays the temperature read by the thermostat control probe;
1 = Freezes the reading on the temperature value read by the thermostat control probe
when the defrost cycle starts until the next set point value is reached.
2 = displays the label  deF during defrosting until the next time the Set point value is
reached.
dro (3) display read-out. Select °C or °F to display temperature read by probe. 0/1 0 1 flag
0 = °C, 1 = °F.
ddd Selection of the value type to be displayed. 0/1/2 1 2 num
0 = Set point
1 = Probe 1
2 = Probe 2
CONFIGURATION (folder with  CnF label)
H00 (1) For selection of probe type, PTC or NTC. 0 = PTC; 1 = NTC. 0/1 0 1 flag
H02 Button activation time if buttons are configured for a second function. 0...15 5 2 sec
H11 (2) Configurability of digital inputs/polarity -5...5 0 2 num
0 = disabled;
Ä…1 = defrosting;
Ä…2 = reduced set point;
Ä…3 = Auxiliary
Ä…4 = door switch;
Ä…5 = external alarm.
H21 Digital output configurability (B) 0...5 1 2 num
0 = disabled;
1 = compressor;
2 = defrosting;
3 = fans;
4 = alarm;
5 = auxiliary
H22 Digital output configurability (A) 0...5 2 2 num
Same as H21.
H23 Digital output configurability (C) 0...5 3 2 num
Same as H21.
ID 974LX 5/7
FAn
AL
Add
diS
CnF
PAR. DESCRIPTION RANGE DEFAULT LEVEL** U.M.
H25 (4) Buzzer output configurability. 0...5 4 2 num
Same as H21.
H31 UP button configurability. 0...3 1 2 num
0 = disabled;
1 = defrosting;
2 = Auxiliary
3 = Reduced set (economy)
H32 DOWN button configurability. 0...3 0 2 num
0 = disabled;
1 = defrosting;
2 = Auxiliary
3 = Reduced set (economy)
H33 Function key configurability (ESC function). 0...3 0 2 num
0 = Disabled
1 = defrosting;
2 = Auxiliary
3 = Reduced set (economy)
H41 Presence of regulation probe n/y y 2 flag
H42 Presence of evaporator probe n/y y 1 flag
rEL reLease firmware. Device version: read only parameter. / / 1 /
tAb tAble of parameters. Reserved: read only parameter. / / 1 /
COPY CARD (folder with  Fpr label)
UL Up load. Transfer of programming parameters from instrument to Copy Card. / / 1 /
dL Down load. Transfer of programming parameters from Copy Card to instrument. / / 1 /
Fr Format. Cancelling all data entered in the copy card. / / 2 /
N.B.: If  Fr parameter (copy card formatting) is used, the data entered in the
card will be permanently lost. This operation cannot be undone.
(1) For 230 Va models, the default value is 1 (NTC input, see label on the device).
(2) Positive values: Active function for closed contact; negative values: Active function with open contact
(3) When you change the set points from °C to °F or vice versa, set point and differential values, etc., are NOT converted. (for example,  set=10 °C becomes set=10°F )
(4) Parameter displayed on models with optional buzzer.
* VALUE column: to be compiled manually with any custom settings (if different from default value).
** LEVEL column: indicates the visibility level of parameters accessed using a PASSWORD (see relevant paragraph)
*** PA2 is visible (it will be requested, if specified) at level 1 and can be set (modified) at level 2
dty compressor relay
dCt
defrost relay
(in defrost mode)
0 = electrical defrosting; OFF
0= operating hours
ON when dit is reached
1 = cycle reversing defrosting; ON
Compressor
OFF when Pb2=dSt or for time (dEt)
2 = Free mode defrosting. ON if requested from set point
(DIGIFROST® method);
0 = electrical defrosting; OFF
1= Hours of operation
ON when dit is reached
1 = cycle reversing defrosting; ON
of device
OFF when Pb2=dSt or for time (dEt)
2 = Free mode defrosting. ON if requested from set point
0 = electrical defrosting; OFF
2 = compressor stop.
ON when compressor is OFF
1 = cycle reversing defrosting; NOT RECOMMENDED!!!
OFF when Pb2=dSt or for time (dEt)
2 = Free mode defrosting. ON if requested from set point
Set DESCRIPTION
SEt Regulation values ranging between the minimum set point LSE and the maximum set point HSE. The set point value is displayed in the machine status
menu.
PA2 The CnF folder you only be used to access level 2 parameters from label PA2 after you have entered the correct password by pressing the  set button
NOTE: Level 1 enables you to display the parameters of level 1 only.
Level 2 enables you to display the parameters of level 2 only.
MAX/MIN ALARMS
Temperature expressed as an absolute value (par  Att =0) Temperature expressed in relation to set point
Abs(olute) (par  Att =0) reL(ative)
2
1
Off
AFd AFd
AFd AFd
set
LAL HAL
set - LAL set + HAL
Minimum temperature alarm Temperature lower than or equal to LAL (LAL with sign) Temperature lower than or equal to set point+LAL (LAL only positive)
Maximum temperature alarm Temperature higher than or equal to HAL (HAL with sign) Temperature higher than or equal to set point+HAL (HAL only positive)
Minimum temperature alarm Temperature higher than or equal to LAL+AFd Temperature greater than or equal to set point + LAL + AFd
back swing Temperature set point -|LAL|+AFd
Maximum temperature alarm Temperature lower than or equal to HAL-AFd Temperature lower than or equal to set point+HAL-AFd
back swing Temperature
if Att=reL(ative) LAL must be negative: therefore
set+LALID 974LX 6/7
CnF
Fpr
WIRING DIAGRAM
MODEL with RELAY 15(8)A 1 hp
MODEL 12-230Vc
ID 974 LX - 12 V ID 974 LX - 12 V
A B C A B C
A A
1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11
TERMINALS
ID 974 LX - 230 V
1 Common relay (A)-(B)-(C) 15A max
A B C
2 N.O. defrost relay (A)
3 N.C. defrost relay (A)
A
4 Fan relay output (B)
5 Compressor relay output (C)
1 2 3 4 5 6 7 8 9 10 11
6 - 7 Power supply 12Va/c
8 - 9 Probe input 2 (evaporator)
8 - 10 Probe input 1 (temperature control)
8 - 11 Digital input
A TTL input for Copy Card and the connection of
TelevisSystem
NOTE: Default load settings
TERMINALS
1 Common relay (A)-(B)-(C) 15A max.
2 N.O. defrost relay (A)
MODEL with Switching Power Supply
3 N.C. defrost relay (A)
4 Compressor relay output (B)
ID 974LX 95-240 Va A
5 Fan relay output (C)
(A) (B) (C)
6 - 7 Power supply
8 - 9 Probe input 2 (evaporator)
8 - 10 Probe input 1 (thermostat)
Supply
8 - 11 Digital input
A TTL input for Copy Card and connection
1 2 3 4 5 6 7 8 9 10 11
to Televis system
NOTE: Default load settings
Pb2 Pb1 D.I.
N
L
DISCLAIMER
TERMINALS
This document is exclusive property of Eliwell Controls S.r.L. and cannot
be reproduced and circulated unless expressly authorized by Eliwell
3 - 4 N.O. defrost relay (A)
Controls S.r.L. Although Eliwell Controls S.r.L. has taken all possible mea-
3 - 5 N.C. defrost relay (A))
sures to guarantee the accuracy of this document, it declines any respon-
2 - 6 Fan relay output (B))
sibility for any damage arising out of its use.
2 - 7 Compressor relay output (C)
The same applies to any person or company involved in preparing and 8 - 9 Probe input 2 (evaporator)
writing this manual. Eliwell Controls S.r.L. reserves the right to make any 8 - 10 Probe input 1 (thermostat)
changes or improvements without prior notice and at any time. 8 - 11 Ingresso digitale D.I.
1 - 2 Power supply - 95...240Va
A TTL input for Copy Card
ELIWELL CONTROLS s.r.l.
Via dell'Industria, 15 Zona Industriale Paludi
32010 Pieve d'Alpago (BL) ITALY
TelevisSystem
Telephone +39 0437 986111
Facsimile +39 0437 989066 BusAdapter130/150
TTL - RS-485 serial interface on DIN rail to connect
Internet http://www.eliwell.it
the device
Personal Computer
to a RS-485 network designed for the connection to
TTL
Technical Customer Support:
a Televis supervision system. + PCI1110/1120
Telephone +39 0437 986300
-
PCInterface1110/1120
Email: techsuppeliwell@invensyscontrols.com TelevisCompact
RS-232/RS-485 serial interface to connect a PC to
BusAdapter
-
several devices connected to a RS-485 network.
TelevisStation
Invensys Controls Europe The BlueCard activation module with Eliwell soft-
ware license must be plugged into the special slot.
An Invensys Company
8/2006 GB
RS485
cod. 9IS42067
ID 974LX 7/7
Pb2
Pb1
Pb2
Pb1
D.I.
Pb1
Pb2


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