OSAKA
- OF 33 AZ - OPERATING INSTRUCTIONS - Vr. 01 - PAG. 4
3.4 - ELECTRICAL WIRING DIAGRAM
Dig
Pr1
Pr2
INPUTS
NO
NO
C
NC
SUPPLY
NO
OUT3: 5A-AC1(2A-AC3) / 250 VAC
OUT2: 8A-AC1(3A-AC3) / 250
VAC
OUT1: 16A-AC1(6A-AC3) / 250 VAC
OUT2
OUT1
OUT3
1
2
3
4
5
6
7
8
9
10
11
12
BUZZER
INTERNAL
OF 33 Z / OF 33 AZ
4 - FUNCTIONS
4.1 - MEASURING AND VISUALIZATION
All the parameters concerning measuring are contained in the
group
“
]
InP”.
Via the parameter
“SEnS”
it is possible to select the type of
probes that one wishes to use and which can be: thermistores
PTC KTY81-121 (Ptc) or NTC 103AT-2 (ntc).
Once the type of probe used has been selected, through the
parameter
“Unit”,
it is possible to select the temperature unit
of measurement (°C or °F) and, through the parameter
“dP”
,
the resolution of the desired measurement (OFF=1°; On =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
“OFS1”
(for the
probe Pr1) and
“OFS2”
(for the probe Pr2).
If probe Pr2 (evaporator) is not used, set the parameter
“Pr 2”
= OFF.
Using the parameter
“FiL”,
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 paragraph
“diSP”,
it is possible to fix the normal
visualisation on the display that can be the measurement of the
cell probe (Pr 1), the measurement of the evaporator probe (Pr
2), the set point of active regulation (SP), the current hour if the
instrument has a clock (CLo) or it can have the numerical
display switched off (OFF).
Regardless of what is set in the parameter “diSP”, it is possible
to visualise all the variables in rotation by pressing the key F,
the display will alternately show the code that identifies the
variable (
Pr 1
,
Pr 2
and, if present the clock,
CLo
) and its
value.
The exit of this visualisation mode occurs automatically 15
seconds after the last pressing on the key F.
Please remember that visualisation of the probe Pr1 can be
changed by the display block in defrosting function too, by
using the parameter “dLo” (see par. 4.6).
4.2 - OUTPUTS CONFIGURATION
The instrument outputs can be configured in the parameters
group
“
]
O
ut”
where the relative parameters
“O1F” , “O2F”
“O3F”
are found and also the parameter
“buF”
that allows
configuration of the internal buzzer (if present).
The outputs can be configured for the following functions
= Out
- to control the compressor or however, the temperature
control device
= dEF
- to control the defrosting device
= FAn
- to control the fans
= AuS
- to control the auxiliary device (see par. 4.11)
= ALt
- to control a silenceable alarm device through a contact
that is normally open, and then closed when the alarm sounds
= AL
- to control an alarm that cannot be silenced through a
contact that is normally open and closed when the alarm
sounds.
= ALL
- to control an alarm with a memory function through a
contact that is normally open and closed when the alarm
sounds.
= -ALt
- to control a silenceable alarm device through a contact
that is normally closed, and then open when the alarm sounds.
= -AL
- control an alarm that cannot be silenced through a
contact that is normally closed and open when the alarm
sounds.
= -ALL
- to control an alarm with a memory function through a
contact that is normally closed and open when the alarm
sounds (see alarm memory).
= OFF
- Disabled output
4.3 - TEMPERATURE CONTROL
All the parameters concerning temperature regulation are
contained in the group
“
]
rEG”.
The regulation of the instrument is ON/OFF and acts on the
output configured as “Out” depending on the measuring of
probe Pr1, of the active Set Point
“SP”
(1 or 2), the intervention
differential
“HSEt”
and the function mode
“Func”
.
Depending on the function mode programmed on the
parameter “Func” the differential is automatically considered by
the regulator with positive values for a Refrigeration control
(“Func”=CooL) or with negative values for a heating control
(“Func”=HEAt).
O u t
S P
o ff
O N
H E A t
O u t
tim e
H S E t
S P
T e m p .
H S E t
tim e
C o o L
O N
O N
O N
O N
O N
o ff
o ff
o ff
P r1
P r1
T e m p .
In the event of cell probe error (Pr1), it is possible to set the
instrument so that that the output “Out” continues to work in
cycles according to the times programmed in the parameter
“tonE”
(activation time) and
“toFE”
(deactivation time).
If an error occurs on the probe Pr1 the instrument activates the
output for the time “tonE”, then deactivates it for the time “toFE”
and so on whilst the error remains.
Programming “tonE” = OFF lthe output in probe error condition
will remain switched off.
Programming instead “tonE” to any value and “toFE” = OFF the
output in probe error condition will remain switched on.
Remember that the temperature regulation function can be
conditioned by the “Continuous Cycle”, “Compressor
Protection”, “Minimum compressor function time”, “Delay
compressor start up after defrosting” and “inhibition of
compressor close to defrosting” functions described below.
4.4 - CONTINUOUS CYCLE FUNCTION
The instrument has a continuous cycle function by which it is
possib
le to maintain the configured output configured as “out”
always active for the time set in parameter
“tCC”
(in the group
“
]
rEG”)
regardless of the temperature control command.
The function can be used for example, when rapid lowering of
the product temperature is required after the refrigerator
loading phase.
During the continuous cycle, the defrosting is inhibited and the
temperature alarms are disabled during the entire cycle and
also later for the time set in parameter
“dALc”
(see par. 4.9).
Starting up a continuous cycle can only be done by a manual
command using the F or DOWN/AUX (“UrSb” or “Fbd” = 2)
keys or via the digital input (“diF”=3) if suitably programmed
(see par. 4.10 and 4.12).
The continuous cycle in progress is shown on the display with
the indication
CC
and can be stopped by a further action on the
key or digital input (as for activation).
The continuous cycle function cannot be activated during
defrosting and with "tCC" = OFF.
