F03 - Using Presets:
Allows configuration of the controller so as whether or not to use the presets:
[no,,]
- No:
If configured this way, the instrument will not use the preset values in the control routines.
For this purpose, the setpoint
[SP,,]
will be used, adjusted via the quick access menu. The control
differential to be used shall be the same as in preset
[rc1,]
, F06 “OUT1 output control differential
(
[rc1,]
)”. The cooling time to be used shall be the same as in preset
[rc1,]
, F07 “OUT1 output
cooling time (
[rc1,]
)”. Defrost time to be used will be the same as in preset 1, F08 “OUT1 output
defrost time (
[rc1,]
)”.
The value configured in
[SP,,]
may be adjusted between F13 “Minimum setpoint allowed to the end
user” and F14 “Maximum setpoint allowed to the end user”.
In this configuration, the controller will not indicate which preset is enabled.
[yEs,]
- Yes:
Selection of presets will be made through the quick access menu, in the same way as for
adjusting the setpoint. In this configuration, the controller will indicate in the display which preset is
enabled,
[rc1,]
or
[rc2,]
. If configured this way, in the control routines the instrument will use the
values of setpoint, control differential, cooling time and defrost time configured in the parameters table.
F04 - Output operating mode OUT1:
Selects the out1 output operating mode:
[,,,0]
- Cooling
[,,,1]
- Heating
F05 - Operation setpoint (
):
It is the reference value for temperature control, that is, the temperature to be maintained in a controlled
environment when preset (
[rc1,]
) is used.
F06 - Control differential (Hysteresis) (
):
It is the difference in temperature (hysteresis) between TURNING ON and OFF the cooling (or heating)
when recipe (
[rc1,]
) is used.
Example:
One wants to control the temperature at 4.0 °C with a differential of 1.0 °C. Therefore, the
cooling is switched off at 4.0 °C and switched back on at 5.0 °C (4.0 + 1.0).
F07 - Cooling time (interval between defrosts) (
):
Corresponds to the time the controller will act on cooling when preset (
), is used; following this
period, the controller enters the natural defrost process.
F08 - Defrost time (
):
It is the defrost duration time when preset (
) is used. Within this period, the relay will remain off;
following this period, the controller will then return to the cooling state.
F09 - Operation setpoint (
):
It is the reference value for temperature control, that is, the temperature to be maintained in a controlled
environment when preset (
) is used.
F10 - Control differential (Hysteresis) (
[rc2,]
):
It is the difference in temperature (hysteresis) between TURNING ON and OFF the cooling (or heating)
when preset (
[rc2,]
) is used.
Example:
One wants to control the temperature at 4.0 °C with a differential of 1.0 °C. Therefore, the
cooling is switched off at 4.0 °C and switched back on at 5.0 °C (4.0 + 1.0).
F11 - Cooling time (interval between defrosts) (
[rc2,]
):
Corresponds to the time the controller will act on cooling when recipe (
[rc2,]
) is used; following this
period, the controller enters the natural defrost process.
F12 - Defrost time (
[rc2,]
):
It is the defrost duration time when preset (
[rc2,]
) is used. Within this period, the relay will remain off;
at the end of this period, the controller will return to the cooling state.
F13 - Minimum setpoint allowed to the end user:
Avoids regulation of excessively low setpoint temperatures by mistake.
F14 - Maximum setpoint allowed to the end user:
Avoids regulation of excessively high setpoint temperatures by mistake.
F15 - Minimum OUT1 output time on:
It is the minimum time the compressor will remain on, i.e. the time interval between the last start-up and
the next stop.
F16 - Minimum OUT1 output time off:
It is the minimum time the compressor will remain off, i.e. the time interval between the last stop and the
next start-up. It is used to relieve the discharge pressure and increase the service life of compressor.
F17 - Initial status when energizing the instrument:
It allows defrosting when controller is energized such as, for example, upon resuming of electric power
(in the event of power outage).
[,,,0]
- Cooling
[,,,1]
- Defrost
F18 - Temperature indication locked during defrost:
If
[,F18]
is enabled, the indication will only be released at the next cooling cycle after the temperature
reaches the “locked” value again, or after 15 minutes in cooling (as a safety measure).
F19 - Instrument energization delay:
This function being enabled, when the instrument is energized it only works as temperature indicator
remaining with the output off during the defined time. In installations with several units of equipment,
configuring different values for the delay time in the start-up of each instrument, it is possible to avoid
peaks of demand by activating the loads at different times.
This delay may be of the compressor or of defrost (when defrost is configured at the start).
Note:
At its end, the count of minimum time of output off is started, if there is any.
[Rc1,]
[Rc1,]
[Rc1,]
[Rc1,]
[Rc1,]
[Rc1,]
[Rc2,]
[Rc2,]
Temperature [°C]
Setpoint
Cooling
Se Hysteresis
Time [S]
Relay Off
Relay On
4°C
5°C
Temperature [°C]
Setpoint
Heating
Setpoint - Hysteresis
Time [S]
4°C
5°C
Relay Off
Relay On
F20 - Compressor status with the sensor damaged:
If the sensor is in short-circuited, off or out of the measure range, the compressor assumes the set status
in this function.
[,,,0]
- Compressor off
[,,,1]
- Compressor on
[,,,2]
- Cycling according to times defined in
[,F21]
and
[,F22]
Note:
If in the heating mode, and in error, the output will be switched off.
F21 - Compressor time on in case of error:
F22 - Compressor time off in case of error:
These determine the minimum time the compressor will remain on/off, respectively, if the sensor is off or
out of the measure range.
F23 - Maximum Compressor on without reaching setpoint:
This is the maximum time the compressor may remain on without reaching the setpoint during the
cooling process for safety reasons. If this time is surpassed, the output is switched off and also the visual
alarm
[ALrC]
and the audible alarm (buzzer) will be activated. This function can be switched off by
setting it at the minimum value 0
[no,,]
.
Note:
In this situation, the controller should be switched off and switched back on so as to continue with
the operation.
Note 2:
If the OUT2 output is set up to work differently from the alarm, this will also be switched off for
safety reasons.
F24 - Low temperature alarm:
The temperature below which the instrument will indicate visual low temperature alarm
[ALo,]
and
the audible alarm (Buzzer). The differential for alarm shutdown is set at 0.1 °C/1 °F. This alarm
considers the temperature displayed, thus being influenced by the indication of temperature lockdown
during defrost
[,F18]
.
F25 - High temperature alarm:
The temperature above which the instrument indicates high visual temperature alarm
[Ahi,]
and the
audible alarm (Buzzer). The differential for alarm shutdown is set at 0.1 °C/1 °F. This alarm considers
the temperature displayed, thus being influenced by the indication of temperature lockdown during
defrost
[,F18]
.
Note:
If an alarm event takes place, the OUT1 output is switched off if the controller is operating in
cooling mode and the alarm triggers for low temperature or the controller is operating in heating mode
and the alarm triggers for high temperature.
F26 - OUT2 output operating mode:
Selects the OUT2 output operating mode:
[,,,1]
- Absolute extra-range alarm:
Considers the values defined in
[,F24]
and
[,F25]
as
minimum and maximum values to activate the alarm output.
[,,,2]
- Extra-range alarm relating to the setpoint:
Considers the active preset setpoint
[rc1,]
or
[rc2,]
and the absolute values defined in
[,F24]
and
[,F25]
, i.e. the positive value of these
functions as minimum and maximum values to activate the alarm output.
For example:
Desired temperature
[SP,,]
: - 5 °C
Low temperature alarm
[,F24]
: 2 °C
High temperature alarm
[,F25]
: 2°C
Limits: (
[SP,,]
-
[,F24]
and
[SP,,]
+
[,F25]
).
The low temperature alarm will be signaled at -7°C(-5 -2) and the high temperature alarm at -3°C(-5+2).
[,,,3]
- Electric defrost (by resistance):
Where only the OUT2 output is activated during the
defrost process.
[,,,4]
- Hot gas defrost:
Where the OUT1 and OUT2 compressor outputs are activated during the
defrost process.
[,,,5]
- OUT2 output as OUT1 output NC:
In this option, the OUT2 output is activated when OUT1
output is deactivated, irrespectively of the state (cooling/heating or defrost), except when the sensor is
in error
[,F20]
.
Note:
If the OUT2 output is configured to work differently from alarm, the indications of absolute alarm
are still visual (messages in the display) and audible (if the buzzer is enabled).
Note 2:
If the OUT2 output is configured to work as defrost (electrical or hot gas), after elapsing of
defrost time a fixed 2-minute time period is counted for drainage. This time is necessary for the dripping,
i.e. for the last drops of water to run from the evaporator. Within this period, outputs OUT1 and OUT2
remain off.
F27 - Alarm inhibition time when energizing the controller:
This is the time during which the alarm remains off even under conditions of alarm during the instrument
start-up. This time will be counted after elapsing of the time configured in
[,F19]
. This function can be
switched off by setting it at the minimum value 0
[no,,]
.
F28 - Enable buzzer (0-Disabled/1-Enabled):
Allows enabling and disabling of the internal buzzer for alarm signaling.
F29 - Digital input operating mode:
Selects the digital input operating mode.
[no,,]
- Disabled
[,,,1]
- Digital input: Open door (active at the contact closing)
[,,,2]
- Digital input: Open door (active at the contact opening)
[,,,3]
- Digital input: External alarm/power outage (active at the contact closing)
[,,,4]
- Digital input: External alarm/power outage (active at the contact opening)
[,,,5]
- Digital input: Open door and power outage (active at the contact closing)
[,,,6]
- Digital input: Open door and power outage (active at the contact opening)
Examples of connection for detecting open door alarm:
This configuration may be used for the
to detect whether the door has been left open for a
time above the value set up in “
[,F32]
- Time with open door to trigger alarm”. In this configuration, the
message
[AOPn]
is displayed when an open door alarm is detected. To that end, the user may use the
NO or NC pushbuttons (not supplied) connected to the digital input, as shown in examples below:
MT-514
e
1
5 6 7 8
2 3 4
SENSOR
NC
F29 =
[,,,1]
Door contact
1
5 6 7 8
2 3 4
SENSOR
NO
F29 =
[,,,2]
Door contact