Ascon Tecnologic - e34B - OPERATING INSTRUCTIONS - PAG. 8
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, 4
The Buzzer sounds both when a key pressed and
when an alarm is active.
5.6
Temperature control
The instrument controls the temperature with an
ON
/
OFF
action and operates on the outputs configured as ot and
HE
depending on the
PR1
probe measuring, the acive Set
Point/s
SP1
(or
SP2
,
SP3
,
SPE
and
SPH
), the Hysteresis
rd
(or
rEd
and/or
rHd
) and the function mode set with
rHC
.
Using
rHC
can be set the following functioning modes:
C
Cooling
H
Heating
SP
Temp.
rd
time
off
off
SP
rd
time
ON
rHC
=
C
rHC
=
H
off
off
ON
ON
ON
ON
ON
Output
ot
Output
ot
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
).
nr
Neutral Zone
SP
off
off
ON
Temp.
time
rd
rd
off
off
rHC
= nr
ON
ON
HE
ot
Outputs
Pr1
When
rHC
=
nr
, the output configured as
ot
operates with a
cooling action (like
rHC
=
C
) while the output configured as
HE
operates with a heating action both with the Active Set
Point (
SP1
,
SP2
,
SP3
,
SPE
or
SPH
). The intervention differ-
ential (
rd
/
rEd
/
rHd
) is automatically assumed by the control-
ler to have positive values for the cooling action and negative
values for the heating action.
HC
Cooling and Heating with independent Set Points
SP
SPH
off
off
off
Temp.
time
rd
rd
off
off
off
RHC
= HC
ON
ON
ON
ON
ON
HE
ot
Pr1
Outputs
As in the previous case, when
rHC
=
HC
the output configured
as
ot
operates with cooling action (like
rHC
=
C
) while the out-
put configured as
HE
operates with heating action (
rHC
=
H
).
In this case, however, the Set Point for the
ot
output is the
active one between
SP
,
SPE
or
SPH
, while for the
HE
output
the Set Point is
SPH
. The intervention differential for the
ot
output is the active between
rd
,
rEd
or
rHd
and is automati-
cally assumed by the controller to have positive values for the
cooling action while for the output
HE
the differential is
RHd
considered with negative values as for the Heating actions.
In this mode, the activation of the
Turbo
cycle causes the
instrument to operate with Neutral Zone and
SPH
set point.
C3
Cooling with three automatic modes
The instrument operates in cooling mode only, but this
selection activates automatic switching between the
three
Normal
/
Eco
/
Turbo
modes (described at para-
graph “
Operating modes
”).
