Ascon Tecnologic - Z31V - OPERATING INSTRUCTIONS - PAG. 4
m
Moreover,
before connecting the outputs to the ac-
tuators
, check that the parameters set are the desired
ones and the application works correctly in order to
avoid malfunctions in the plant that could cause dam-
age to people, things or animals.
4.3.1
Electrical wiring diagram
Z31V
Inputs
Power supply
Out1
SPDT
SPST-NO
Out1:
16 A-AC1 (6 A-AC3)/250 VAC; 1 HP 250 VAC, 1/2 HP 125 VAC
Common:
12 A max. for models with removable terminal blocks
Probe
NC
C
NO
C
NO
Internal
Buzzer
5. FUNCTIONS
5.1
Measure and display configuration
Using the parameter
i.SE
it is possible select the type of
probe is connected to the instrument:
Pt
Thermistor PTC KTY81-121,
nt
Thermistor NTC 103AT-2.
Instead, with the
i.uP
parameter it is possible to select the
temperature engineering unit and the desired measure reso-
lution (
C0
= °C/1°;
C1
= °C/0.1°;
F0
= °F/1°;
F1
= °F/0.1°).
The instrument allows the measurement calibration, which
can be used to recalibrate the instrument according to appli-
cation needs, the calibration is made by using parameter
i.C1
.
Using
i.Ft
parameter it is possible to set a software filter
for the measuring the input values in order to decrease the
sensibility to rapid temperature changes (increasing the time).
The instrument normally displays the temperature measure-
ment, but it is possible see the maximum and minimum peak
measurement using the
key. Pressing and releasing the
key the display alternately shows the code that identifies
the variable (see below) and its value. The variables are:
Lt
Minimum stored temperature;
Ht
Maximum stored temperature;
Pr1
Current temperature measured by probe Pr1.
Minimum and maximum peak values are not retained when
the power is removed and can be reset by pressing the
key for 3 s while the peak value is displayed. After 3 sec-
onds the display shows “
---
” for an instant to indicate the
peak value has been erased and takes as peak temperature
the one measured at that moment.
The variables display mode is automatically abandoned after
about 15 seconds from the last pressure of the
key
5.2
Alarm functions
The alarm conditions of the instrument are:
–
Probe errors
E1
and
-E1
;
–
Temperature alarms
Hi
and
Lo
.
The alarm functions act on the LED, the internal buzzer, if
present and configured by the parameter
o.bu
and the relay
output if present.
The parameter
o.bu
allows the configuration of the internal
buzzer as follows:
oF
Buzzer disabled
1
Buzzer activated only to signal alarms;
2
Buzzer activated briefly only to signal the keys pres-
sures (does not signal alarms);
3
Buzzer is activated to signal both alarms and key
pressures.
Any active alarm condition is signaled with the LED
switched on while the silent alarm condition is signaled with
the flashing LED.
The buzzer (if any) can be configured to signal alarms by
programming the parameter
o.bu
= 1 or 3 and always oper-
ates as a tacit alarm signal. This means that, when activat-
ed, it can be silenced by a short pressure of any key.
The relay output, if present, will be activated when an alarm is
triggered to deactivate when there are no alarms in progress.
5.3
Temperature alarms
The temperature alarm function acts according to the meas-
urement of the probe, the alarm thresholds set at parameters
A.HA
(maximum alarm) and
A.LA
(minimum alarm) and the
A.Ad
differential.
By means of some parameters it is also possible to delay
the enabling and the intervention of these alarms. These
parameters are:
A.PA
Temperature alarm exclusion time when powering ON
the instrument if, when switched ON, it is in alarm con-
dition. If at power ON the instrument is not in alarm
conditions, the
A.PA
time is not considered;
A.At
Temperature alarm delay activation time. The temper-
ature alarm is enabled at the end of exclusion time and
is triggered after the
A.At
time, when the temperature
measured by the probe rises above or falls below the
respective maximum and minimum alarm thresholds.
AL
A.LA
A.HA
Temp.
A.Ad
A.Ad
time
off
off
off
ON
ON
Hi
Lo
Maximum and minimum temperature alarms can be disabled
by setting their relevant parameters
A.HA
and
A.LA
=
oF
.
