Carel easy small wide, User Manual, Page: 22 / 56

22
ENG
ir0300028EN rel. 1.1 - 05.05.2017
4. COMMISSIONING
4.1 Confi guration
The confi guration parameters are set when commissioning the controller,
and involve:
•
date/time setting, if the clock is fi tted (RTC – real time clock);
•
analogue probe measurement stability;
•
probe display stability;
•
standard display shown on the controller, and on the remote display,
and the decimal point;
•
serial address for the supervisor network connection;
•
temperature unit of measure (°C / °F);
•
lock keypad, disable buttons and buzzer;
•
display during the defrost.
D ate/time setting
See example 1 in par. 3.5.
Analogue probe measurement stability
Defi nes the coeffi cient used to stabilise the temperature measurement,
fi ltering the reading based on two algorithms:
•
limitation of variation: the maximum variation the value is limited, so as
to reduce impulsive disturbance;
•
moving average: this limits the eff ect of any noise superimposed over
the temperature measurement that may negatively aff ect control
performance.
Low values assigned to this parameter allow a prompt response of the
sensor to the temperature variations; the reading however become
more sensitive to disturbance. High values slow down the response, but
guarantee greater immunity to disturbance, that is, a more stable and
more precise reading.
Par. Description Def Min Max UOM
/2 Probe measurement
stability 4 1 15 -
Tab. 4.a
P robe display stability
Important: this parameter only applies to the temperature shown
on the display, and not the reference control temperature.
Par. Description Def Min Max UOM
/3 Probe display stability
0 = Disabled
1 = Fast update…
15 = Slow update 0 0 15 -
Tab. 4.b
This parameter is used to set the rate at which the temperature display
is updated. The temperature shown on the display tends to follow rapid
deviations away from the set point very slowly, and vice-versa, moves very
quickly in the event where the temperature displayed is approaching the
set point. In the table the delay of display based to the setting.
/3 Display delay /3 Display delay
0 Disabled 8 50 s
1 5 s 9 60 s
2 10 s 10 75 s
3 15 s 11 90 s
4 20 s 12 105 s
5 25 s 13 120 s
6 30 s 14 150 s
7 40 s 15 180 s
Tab. 4.c
If the control temperature exceeds the high or low temperature
thresholds and a high/low temperature alarm (AH/AL) is activated, or if
the maximum number of fi ltering steps is exceeded, the fi ltering would
immediately be bypassed and the temperature displayed would be the
temperature eff ectively measured, until all the alarms are reset.
Example: in the case of bottle coolers, typically used in supermarkets
where the doors are opened frequently, due to the greater thermal
inertia of the liquids compared to the air (and the fact that the probe
is positioned in the air and not directly on the products), the controller
measures a temperature that is higher than eff ective temperature of the
soft drinks, thus displaying an “unrealistic” temperature. Setting parameter
/3 to a value other than 0, any abrupt variations in temperature are
“fi ltered” on the display, showing a temperature trend that is “closer” to
the actual trend of product temperature.
D isplay on user terminal and remote display
The user terminal (controller display) can either display the value of the
virtual control probe (see the chapter on control), the reading of probes
1-4 or the set point. Similar displays can be selected on the remote
display, except for the set point.
Par. Description Def Min Max UOM
/tI Display on user terminal
1 Virtual probe 5 Probe 4
2 Probe 1 6 Reserved
3 Probe 2 7 Set point
4 Probe 3
1 1 7 -
/tE Reading on remote display
0 Terminal not fi tted 4 Probe 3
1 Virtual probe 5 Probe 4
2 Probe 1 6 Reserved
3 Probe 2
0 0 6 -
Tab. 4.d
S erial address (parameter H0)
H0 assigns the controller an address for the serial connection to a
supervisory and/or telemaintenance system.
Par. Description Def Min Max UOM
H0 Serial address 1 0 207 -
Tab. 4.e
Temperature unit of measure and decimal point display
The following settings are available:
•
choose the temperature unit of measure, between degrees Celsius (°C)
and Fahrenheit (°F);
•
enable/disable the decimal point on the display and the buzzer.
Par. Description Def Min Max UOM
/5 Temperature unit of measure
0 =°C, 1 =°F 0 0 1 -
/6 Display decimal point
0/1 = yes/no 0 0 1 -
H4 Buzzer
0/1=enabled/disabled 0 0 1 -
Tab. 4.f
Lock keypad and disable buttons
Certain functions regarding the use of the keypad can be disabled, for
example parameter and set point settings if the controller is accessible
to the public. In addition, an individual button or group of buttons can
be disabled.
Par. Description Def Min Max UOM
H2 Disable keypad functions 1 0 6 -
H6 Terminal keypad lock confi guration
0 = all buttons enabled 0 0 255 -
Tab. 4.g
F unctions that can be disabled on the keypad
Important: if setting H2 ≠ 1, 3, the type F parameters cannot be set,
but rather only their values can be displayed. Type C parameters, being
password-protected, can always be set on the keypad following the
procedure described in chap. 3. If “set point” and “F parameter” setting is
disabled, the set point and the type F parameters cannot be set, but
rather only their values can be displayed.
Note: Y = can be activated / enabled; N = cannot be activated /
enabled