Ascon Tecnologic - e33 - OPERATING INSTRUCTIONS - PAG. 6
5.2.2
Turbo/Normal/Eco operation selection
Turbo
mode can be selected manually:
–
Pressing the
/
key if parameter
tUF
=
4
;
–
Pressing the
/Aux
key if parameter
tFb
=
4
;
–
From digital input if parameter
i.Fi
=
8
;
Turbo
mode can be selected automatically:
–
Leaving Eco mode (only if
rHC
=
C3
)
–
Every time the instrument is switched ON (only if
rHC
=
C3
and Pr1 > SPE + rEd)
The instrument quits Turbo mode and returns to normal mode
automatically at the end of
rtC
time or manually using the
programmed command (key or digital input).
Setting
rHC
=
C3
gives the following operating cycle:
At power ON, the instrument starts in the mode it was in
when it was switched OFF (Normal or “Eco”) unless the tem-
perature at power ON is > SPE + rEd. In this case (see fig.)
a
Turbo
cycle is automatically initiated.
After time
rtC
the instrument automatically swiyches to
Nor-
mal
mode. If the door is opened frequently, the instrument
remains in
Normal
mode. If however the door is not opened
for time set at
iEt
parameter, it automatically switches to
Eco
mode.
The instrument remains in
Eco
mode until the door is
opened again or, if set, until the time-out
itt
.
On leaving
Eco
mode the instrument therefore runs a
Turbo
cycle to allow product temperature to be restored, after
which it reverts to
Normal
mode and so on.
Temp.
SPE
Eco
SP
SPH
Turbo
rHd
rEd
itt (2)
rtC
rtC
time
Normal
Turbo
ECO
Turbo
iEt (1)
rd
Pr1
1
The time iEt is reset every time the door is opened and
in the case shown the door is always closed.
2
The time
itt
stops when the door is opened and the
instrument immediately switches to
Turbo
mode. In the
case shown, the door is always closed.
When in
Turbo
mode, the instrument shows the characters
trb
alternated to the normal display indication.
The normal Set Point
SP
can be set to a value between the
one set with parameter
SLS
and the one set with parameter
SHS
while the Economic Set Point
SPE
can be set to a value
between the one set with parameter
SP
and the one set with
parameter
SHS
; the Turbo Set point (
SHP
) can be set to a
value between the one set with parameter
SLS
and the one
set with parameter
Sp
.
Note:
In the following examples the Set Point is generally
indicated as
SP
and the differential as
rd
however the
instrument will act according to the Set Point and the
differential selected as active.
5.3
Measure and display configuration
With parameter
iuP
it is possible to select the tempera-
ture engineering unit and the desired measure resolution
(
C0
= °C/1°;
C1
= °C/0.1°;
F0
= °F/1°;
F1
= °F/0.1°).
The instrument allows the measure calibration, which can
be used to recalibrate the instrument according to applica-
tion needs, the calibration is made by using parameters
iC1
(input Pr1),
iC2
(Pr2 input) and
iC3
(Pr3 input).
Parameters
iP2
and/or
iP3
allows to select the instrument
usage of
Pr2
/
Pr3
measure as:
EP
Evaporator probe: used to managing the defrost and the
evaporator fans (see relative functions).
Au
Auxiliary probe;
DG
Digital Input (see the Digital input functions).
If
Pr2
/
Pr3
input is not used, set
iP2
/
ip3
=
oF
.
Two inputs cannot set to perform the same function.
If two inputs are set to do the same function, this is done
only by the
P2
input.
Using
iFt
parameter can be set a software filter for measur-
ing the input values in order to decrease the sensibility to rapid
temperature changes (increasing the sampling time).
Through the
idS
parameter is possible to set the variable
normally displayed:
P1 Pr1
probe measurement;
P2 Pr2
probe measurement;
P3 Pr3
probe measurement;
SP
Active Set Point;
EC
Pr1 probe measure if the instrument is in Normal mode,
the label
Eco
if the instrument is in (
Eco mode
);
OFF
If the numerical display must be switched off (
oF
).
When one of the measures is displayed (
idS
=
P1
/
P2
/
Ec
)
the
iCU
parameter allows to set an offset that is to be applied
only to the displayed variable (all controls will always made
according to the correct temperature value, changed only by
the calibration parameters).
Regardless of what is set at
idS
parameter, all the measure-
ment variables can be shown pressing the
key.
The display alternately shows the code that identifies the
variable and its value. The variables are:
Pr1
Probe 1 measurement;
Pr2
Probe 2 measurement (on/oFF if Pr2 is a Digital input);
Pr3
Probe 3 measurement (on/oFF if Pr3 is a Digital input);
Lt
Minimum stored Pr1 temperature;
Ht
Maximum stored Pr1 temperature.
The Peak (min./max.) temperature values of
Pr1
probe are
NOT
stored in case of power failure. While the controller is
showing the peak values, these can be reset pressing the
key for 3 s. At the end of the key
pressure, the display
shows “
---
” for an instant to indicate that the min./max. val-
ues have been erased and the new peak is the temperature
read in that moment.
The system exits the variable dosplay mode after 15 s from
the last
key pressure.
It is also noted that the
Pr1
probe display can also be changed
by “
Defrost display lock
” function via the
ddL
parameter
(see the Defrost function).
