Ascon Tecnologic - Y39W Line - Operating Instructions - Pag. 6
5 FUNCTIONS
5.1
ON/Stand-by Function
Once powered the instrument can assume 2 different conditions:
ON:
The controller uses the control functions.
STAND-BY:
The controller uses no control function and the
display is turned OFF except for the Stand-by LED.
The transition between Standby and ON status is equivalent
to power ON the instrument providing the electrical power.
In case of power failure, the system always sets itself in the
condition it was in before the black-out.
The ON/Stand-by function can be selected:
–
Pressing the key / for at least 1 s if
t.UF
=
3
;
–
Pressing the key for at least 1 s if
t.Fa
=
3
;
–
Pressing the key for at least 1 s if
t.Fb
=
3
;
–
Using the Digital Input if parameter
i.Fi
=
3
.
5.2
Measure and Display configuration
Through parameter
i.uP
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 re-calibrate the instrument according to application
needs, through the parameters
i.C1
(for input
Pr1
),
i.C2
(for
input
Pr2
) and
i.C3
(for input
Pr3
).
While
Pr1
probe measure is always the
r1
controller process
value,
i.P2
and
i.P3
parameters allow to select the
Pr2
and
Pr3
measures usage according to the following possibilities:
r2
Controller 2 probe: the probe can be used as process
value for regulator
r2
;
Au
Auxiliary probe: the probe can be used as a display-
only probe to which temperature alarms can be linked;
dG
Digital input (see Digital input functions);
If probe
Pr2
and/or
Pr3
is/are not used, set the relative pa-
rameters
i.P2
and/or
i.P3
=
oF
.
It is not possible to program the two parameters for the same
function, if so, priority goes to
i.P2
.
Using
i.Ft
parameter can be set a software filter for measur-
ing the input values in order to decrease the sensibility to
fast temperature changes (increasing the sampling time).
Through the
i.dS
parameter is possible to set the variable
normally displayed:
P1
Probe
Pr1
measurement;
P2
Probe
Pr2
measurement;
P3
Probe
Pr3
measurement;
S1
Controller
r1
Set Point;
S2
Controller
r2
Set Point;
1.2
Probes
Pr1
and
Pr2
measurements;
1.3
Probes
Pr1
,
Pr2
and
Pr3
measurements;
oF
Numerical display switched OFF.
If one of the alternated variable display options (
1.2
and
1.3
)
is selected, using the
i.td
parameter it is possible manage
the display time of the variables.
In these modes the instrument shows for about 1 s the code
of the variable (
P1
,
P2
,
P3
), then the value of its measure-
ment for the time established with
i.td
, elapsed which it
switches to the code of the next variable and so on.
Regardless of what has been set set for
i.dS
parameter, it is
possible to ciclically view all the measurement and operat-
ing variables by repeatedly pressing and releasing the
key. The display shows the code that identifies the variable
alternated to its value.
The variables that can be displayed are:
Pr1
Probe
Pr1
measurement;
Pr2
Probe
Pr2
measurement (on/oF if set as digital input);
Pr3
Probe
Pr3
measurement (on/oF if set as digital input).
The system automatically exits the variable display mode
after 15 s from the last key pressure.
Note:
The
i.uP
parameter relative to temperature resolution
acts only for display and Set Points, while in the tem-
perature parameters the decimal is always visible.
5.3
Digital Input Configuration
As an alternative to one of the measurement inputs
Pr2
or
Pr3
, the user can set the instrument to use it as a digital
input for voltage-free contacts.
The digital input function (available ON terminal
11
as an
alternative to
Pr2
input if
i.p2
=
dg
or ON terminal
12
as
an alternative to
Pr3
input if
i.p3
=
dg
) is defined using the
i.Fi
parameter and the action is delayed for the time pro-
grammed with parameter
i.ti
. The
i.Fi
parameter can be
configured for the following functions:
0
No function;
1
External alarm signal via NO contact: closing the digital
input (and after the
i.ti
time) the alarm is activated and
the instrument alternately shows ON the display the label
AL
and the variable set at parameter
i.dS
.
2
External alarm signal with all control outputs disable via
NO contact: closing the digital input (and after the
i.ti
time), all the control output are disabled, the alarm is
activated and the instrument alternately shows ON the
display the label
AL
and the variable set at parameter
i.dS
.
3
Instrument Switch ON/OFF (ON/Stand-by) of instrument
via NO contact: closing the digital input (and after the
i.ti
time) the instrument is switched
ON
while it is placed in
Stand-by
when the digital input is open.
4
Auxiliary (
Aux
) output remote control via NO contact: clos-
ing the digital input (and after the
i.ti
time) the auxiliary
output is activated as described at auxiliary output
i.Fo
=
3
function mode.
5
Cell door opening with fan stop via NO contact: closing
the digital input (and after the
i.ti
time) the fans are
stopped and the instrument alternately shows ON the dis-
play the label
op
and the variable set at parameter
i.dS
.
With this function mode, the action of the digital input also
activates the time that can be set with parameter
A.oA
af-
ter which the alarm is activated to point out that the door
has been left open and the fan restarts.
6
Cell door opening without fan stop via NO contact: closing
the digital input (and after the
i.ti
time) the instrument
alternately shows ON the display the label
op
and the
variable set at parameter
i.dS
. With this function mode,
the action of the digital input also activates the time that
can be set with parameter
A.oA
after which the alarm is
activated to point out that the door has been left open.
-1
,
-2
,
-3
,
-4
,
-5
,
-6
These functions are like those just described, but work
with a reversed logic as the contact is NC.
When an input is configured as digital, it is possible to check
its status using the variable display mode through the key
or by configuring the normal display via
i.dS
for the input
configured as digital. The display shows
oF
if the digital
input is open and
on
if closed.
