Ascon Tecnologic - e33B - OPERATING INSTRUCTIONS - PAG. 7
5.4
Digital input configuration
The digital input function (available on
terminal 12
or instead
of
Pr3
input if
ip3
=
dg
) 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
Cell door opening with NO contact: Similar to
iFi
=
1
but with evaporator fans stop. In addition, at open door
alarm intervention (
AoA
), the fans are restarted;
3
Cell door opening with compressor and fan outputs lock
and NO contact: similar to
iFi
=
2
but with compressor
and fans lock. At open door alarm intervention (
AoA
)
both the fans and the compressor are 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 withall control outputs disabled and
NO contact: at input closing (and after the
iti
time) all
the control outputs are disabled, the alarm is activated
and the instrument alternately shows on the display:
AL
and the variable set with parameter
idS
;
6
Normal
/
Eco
mode selection with NO contact: at input clos-
ing (and after the
iti
time) the instrument switches to
Eco
operation mode. Opening the digital input, the instru-
ment 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
Turbo
cycle activation command with NO contact: at in-
put closing (and after the
iti
time) the instrument starts
a Turbo cycle;
-1, -2, -3, etc.
- Features identical to the above but obtained
through a NC contact and a reversed logic operation.
5.5
Outputs and buzzer configuration
The instrument outputs can be configured by the relative pa-
rameters
oo1
,
oo2
and
oo3
. The outputs can be configured
for the following functions:
ot
To control the temperature control device (e.g. Compres-
sor). To manage the cooling control device for neutral
zone control or Cooling (
rHC
=
nr
);
df
To control the defrosting device;
Fn
To control the evaporator fans;
Au
To control the auxiliary device;
At
To control a silenceable alarm device through a contact
that is NO in normal operation then closed during the
alarm;
AL
To control an alarm that cannot be silenced through
a contact that is NO in normal operation then closed
during the alarm;
An
To control an alarm with a memory function through
a contact that is NO in normal operation then closed
during the alarm (see alarm memory);
-t
To control a silenceable alarm device through a con-
tact that is NC in normal operation then opened during
the alarm;
-L
Control an alarm that cannot be silenced through a
contact that is NC in normal operation then opened
during the alarm;
-n
To control an alarm with a memory function through
a contact that is NC in normal operation then opened
during the alarm;
on
To command a device that must be turned ON when
the instrument is ON. The output is therefore deac-
tivated when the instrument is not powered or is in
standby mode. This mode of operation can be used
as a control of the shop window lighting, anti-fogging
resistors or other utilities;
HE
To control a heating device in neutral zone (
rHC
=
nr
);
L1
Showcase light connected to
Normal
/
Eco
mode. The
output turns ON when the
Normal
mode is active while it
is turned OFF when the
Eco
mode is active;
L2
Internal cell light. The output is always OFF and only
switches ON from a digital input signal when it is con-
figured as door opening switch (
iFi
=
1
,
2
,
3
);
oF
Output disabled.
If one of the outputs is configured as auxiliary output (=
Au
),
its function is set by parameter
oFo
and its operation can be
conditioned by the time set at parameter
otu
.
oFo
parameter can be configured for the following functions:
oF
Auxiliary output not active;
1
Temperature control output delayed with NO con-
tact: the auxiliary output is activated with a delay that
can be set with parameter
otu
applied to the output
configured as
ot
. The output is then turned OFF at
the same time as the
ot
output is disabled. This func-
tion mode can be used as a command for a second
compressor or for all other working utilities according
to the same ot output conditions, but which must be
delayed after the start up of the compressor to avoid
excess electricity absorption;
2
Activation by digital input. The output is activated by
a digital input signal if correctly configured (
iFi
=
9
).
These commands have a bi-stable (toggle) function (at
first pression the output is activated, at the second is
disabled). The
Aux
output can be turned OFF auto-
matically after the time set at parameter
otu
.
When
otu
=
oF
the output is activated and deactivated only
manually, via the digital input. Differently, the output, once
activated, is turned OFF automatically after the
otu
time.
This mode of operation can be used as a control of the shop
window lighting, anti-fogging resistors or other utilities.
If present, the internal buzzer can be configured by param-
eter
obu
for the following functions:
oF
Buzzer always disabled;
1
The Buzzer sounds when an alarm is active;
2
The Buzzer sounds when a key pressed (no alarm);
3
The Buzzer sounds when a key pressed and when an
alarm is active.
