Ascon Tecnologic - e31- - OPERATING INSTRUCTIONS - PAG. 6
Temp.
SPE
SP
Door
rd
rEd
iEt
time
“Norm.”
DAY (Shop open)
DAY (Shop open)
NIGHT (Shop closed)
“Norm.”
“ECO”
Pr1
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 the
iuP
it is possible to select the temperature engi-
neering 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) and
iC2
(Pr2 input).
Parameter
iP2
allows to select the instrument usage of Pr2
measure as:
Au
Auxiliary probe;
DG
Digital Input (see the Digital input functions).
If
Pr2
input is not used, set
iP2
=
oF
.
Using
iFt
parameter can be set a software filter for the
measuring 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;
SP:
Active Set Point;
EC:
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 is displayed one of the measures
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 happen
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 (see below) and its value. The variables are:
Pr1
Probe 1 measurement;
Pr2
Probe 2 measurement (on/oFF if Pr2 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 and can be reset pressing
the
for 3 s elapsed which, the display shows “
---
” for an
instant to indicate that the min./max. values 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 function via the
ddL
parameter
(see the Defrost function).
5.4
Digital input configuration
The digital input function is defined using the
iFi
parameter
and the action is delayed for the time programmed with pa-
rameter
iti
. The
iFi
parameter can be configured for the
following functions:
0.
Digital input not active;
1.
Cell door opening with NO contact: at input closure (and
after the
iti
) the instrument displays alternately
oP
and
the variable set at
idS
parameter With this mode of
operation of the digital input activates also the time set
with parameter
AoA
elapsed which the alarm is activated
to warn that the door has been left open. In addition, at
door opening, the instrument returns to normal operation
if it was in Eco mode and the Eco mode activation was
enabled through parameter
iEt
2.
Similar to
iFi
=
1
;
3.
Cell door opening with output lock and NO contact: simi-
lar to
iFi
=
1
but with output lock. At alarm door open
intervention
AoA
also the output is re-activated.
4.
External alarm signal with NO contact: at input closing
(and after the
iti
time) the alarm is activated and the
instrument alternately shows on the display:
AL
and the
variable set with parameter
idS
;
5.
External alarm signal with Control output disabled and
NO contact: at input closing (and after the
iti
time) the
control output is is disabled, the alarm is activated and
the instrument shows on the display alternatively
AL
and
the variable set with parameter
ids
;
6.
Normal/Economic mode selection with NO contact: at input
closing (and after the
iti
time) the instrument switches
to Economic operation mode. Opening the digital input,
the instrument returns in Normal operation mode.
7.
Instrument On/Off (stand-by) selection with NO contact:
at input closing (and after the
iti
time) the instrument
is switched ON while it is placed in Stand-by mode when
the digital input is open;
8.
Do not use;
9. Defrost
activation
command with NO contact: at input
closing (and after the
iti
time) the instrument starts a
defrost cycle;
10. End-Defrost
command with NO contact: at input closing
(and after the iti time), if the defrost cycle is in progress
the instrument stops it, otherwise inhibits the defrost start;
-1... -10
- Features identical to the above but obtained
through a NC contact and a reversed logic operation.
5.5
Temperature control
The instrument control is ON/OFF and acts on the output
depending on the PR1 probe measuring, the Set Point
SP
(or
SPE
), the Histeresys
rd
(or
rEd
) and the function mode
rHC
.
OUT (ot)
OUT (ot)
SP
Temp.
rd
time
off
off
SP
rd
time
ON
rHC
=
C
rHC
=
H
off
off
ON
ON
ON
ON
ON
Pr1
Temp.
Pr1
Depending on the function mode programmed with parameter
rHC
the differential is automatically considered by the control-
ler with positive values for a
Refrigeration
control (
rHC
= C)
or negative values for a
Heating
control (
rHC
= H).
In the event of a probe error, it is possible to set the instru-
