avoid malfunctioning that may cause irregularities in the plant that
could cause damage to people, things or animals.
3.4 - ELECTRICAL WIRING DIAGRAM
Dig.
SUPPLY
Z31Y
1
SPDT
NO
4
3
2
6 7
5
OUT1
NC
C
C
Pr1 Pr2
INPUTS
9
8
10
OUT2
NO
NC
11 12
NO
SPST-NO
C
(12 A MAX for extr. conn. model)
Out2:
Out1:
6 A Res.
6 (4) A
8 (3) A
5 FLA
30 LRA
12 A Res.
60730
EN
16 (9) A
61810
EN
10 (4) A
UL
INTERNAL
BUZZER
4 - FUNCTIONS
4.1 - ON / STAND-BY
FUNCTION
The instrument, once powered up, can assume 2 different
conditions:
- ON : means that the controller uses the control functions.
- STAND-BY : means that the controller does not use any control
function and the display is turned off except for the Stand-by led.
If there is no power, and then power returns, 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 U for at least 1 sec. if the parameter
"t.UF"
= 4.
-Pressing the key DOWN/AUX for at least 1 sec. if the parameter
"t.Fb"
= 4.
- using the digital input if the parameter
“i.Fi”
= 10
4.2 - MEASURING AND VISUALIZATION
Via the parameter
“i.SE”
it is possible to select the type of probes
that one wishes to use and which can be: thermistores PTC
KTY81-121 (
Pt
) or NTC 103AT-2 (
nt
).
Via the parameter
“i.uP”,
it is possible to select the temperature
unit of measurement the desired measurement resolution (
C0
=°C /
1° ;
C1
=°C / 0.1° ;
F0
= °F / 1°;
F1
= °F / 0.1°).
The instrument allows the measuring to be calibrated, that can be
used for re-calibrating the instrument according to application
needs, through the parameters
“i.C1”
(for the input Pr1) and
“i.C2”
(for the input Pr2).
The functions carried out by Pr2 probe is defined by the parameter
“i.P2”
.
This parameter can be configured for the following functions:
= EP
- Evaporator probe: used to managing the defrost and the
evaporator fans (see relative functions)
= Au
- Auxiliary probe
= dG
- Digital input (see Digital input functions)
If probe Pr2 is not used, set the relative parameter
“i.P2”
= oF.
Using the parameter
“i.Ft”,
it is possible to set the time constant
for the software filter for measuring the input values to be able to
reduce the sensitivity to measurement disturbances (increasing the
time).
Through the parameter
“i.dS”,
it is possible to fix the normal
visualisation on the display that can be the measurement of the
probe Pr1 (P1), the measurement of the probe Pr2 (P2), the active
set point value (SP), or it can have the numerical display switched
off (oF).
Through the parameter
“i.CU”,
it is possible to program an measu-
re offset that will be applied to the temperature show on the display
(only if i.dS”= P1, P2).
All the controls will always happen in operation of the measure
corrected only by the calibration parameters (“i.C1”, “i.C2”).
The normal visualisation on the display is established by par.
“i.dS”, but it is possible to visualise all the variables and the highest
and lowest Pr1 peak measurement values in rotation by quickly
pressing and releasing key U.
The display will alternately show the code that identifies the
variable and its value.
The variable are:
“Pr1”
- Pr1 temperature
“Pr2”
- Pr2 temperature ( on/oF state if is progr. as digital input )
“
Lt”
and the lowest Pr1 peak temperature
“Ht
” and the highest Pr1 peak temperature
When the instrument is switched off, peak values are always
re-set. However, it is also possible to reset these values if the
instrument is switched on by using the DOWN key hold for 3 sec.
during peak visualization.
The display will show “---” and peaks memory will be reset.
The exit of this visualisation mode occurs automatically 15 seconds
after the last pressing on the key U.
Please remember that visualisation of the Pr1 probe can be
changed by the defrosting display lock function, by using the
parameter
“d.dL”
(see defrost function).
4.3 - DIGITAL INPUT
The digital input present on the instrument, alternative to Pr2
probe, accepts free voltage contacts, the function carried out is
defined by the parameter
“i.Fi”
and the action can be delayed for
the time set in parameter
“i.ti”.
If digital input is used, set the input relative parameter “i.P2” = dG.
The parameter “i.Fi” can be configured for the following functions:
= 0
- No function
= 1
- Defrosting start command with contact normally open: on
closing the digital input 1 (and after the “i.ti” time) a defrosting cycle
is activated.
= 2
- Defrosting end command with contact normally open: on
closing the digital input 1 (and after the “i.ti” time) a defrosting cycle
is ended if in progress or defrosting is inhibited.
= 3
- continuous cycle activation command with contact normally
open: on closing the digital input (and after the “i.ti” time) a
continuous cycle is started up as described in the paragraph on the
continuous cycle function.
= 4
- External alarm signal with contact normally open: on closing
the digital input (and after the “i.ti” time) the alarm is activated and
the instrument visualises
AL
and the variable set in parameter
“i.dS” alternately on the display.
= 5
-Cell door opening with fan stop with contact normally open: on
closing the digital input (and after the “i.ti” time) the fans are
stopped and the instrument visualises
oP
and the variable set in
parameter “i.dS” alternately on the display. With this function mode,
the action of the digital input also activates the time that can be set
in parameter "A.oA" after which the alarm is activated to signal that
the door has been left open and the fa n restart.
= 6
- Cell door opening with compressor and fan stop with contact
normally open: similar to “i.Fi” = 5 but with fan and compressor
stop. At the intervention of the door open alarm alarm compressor
and fan restarts.
= 7
- Remote control of auxiliary output AUX with contact normally
open: on closing the digital input (and after the “i.ti” time) the
auxiliary output is activated as described in the "i.Fo" = 2 function
mode of the auxiliary output.
= 8
- Selecting the active set point (SP/SP2) with contact normally
open: on closing the digital input (and after the “i.ti” time) the
temperature set point “SP2” is activated. When instead the input is
open the set point “SP” is active.
= 9
- Signalling of external alarm with disablement of all the control
outputs with contact normally open: on closing the digital input
(and after the “i.ti” time) all the control outputs are disabled, the
alarm is activated and the instrument visualises
AL
and the
variable set in parameter “i.dS” alternately on the display.
= 10
- Switching on/switching off (Stand-by) of instrument with
contact normally open: on closing the digital input (and after the
“i.ti” time) the instrument is switched on while it is placed in
Stand-by when opened.
ASCON TECNOLOGIC - Z31Y
- OPERATING INSTRUCTIONS - Vr. 02 - 04/12 - ISTR-MZ31YENG02 - PAG. 4
