OSAKA
- USER MANUAL - B4U - v2 - PAG. 7
SP
: the active regulation set point (SP),
Ec
: Measurement of the Pr1 probe in normal mode with the initials
“Ec” in the dispaly if the controller is in ECONOMIC mode.
F1
: Measurement of the filtered Pr1 probe through the parameters
"dd" and "du".
oF
: Numeric display off
(OFF).
If one of the measurements is displayed ("dS" = P1, P2, P3, Ec, F1)
the "CU" parameter allows setting an offset that is applied to show
only the variable (all regulation controls will always be carried out
according to correct measurement of the calibration parameter).
Regardless of what is set in the "dS" parameter, it is possible to view
all the measurement and operating variables in a rotating manner, for
this see section 2.7 - VARIABLES DISPLAY.
Also remember that the display related to the Pr1 probe can be
modified by means of the screen lock function during defrost through
the "dL" parameter (see 5.8 - Defrost control).
5.4 - DIGITAL INPUT CONFIGURATION
The parameters related to the configuration of the digital inputs are
found in the group "-In".
The B4U Display has 1 digital input for power-free contacts whose
function is defined in parameter "1F" and whose action is delayed by
the time established in parameter "1t".
On the other hand, the Power Unit B4U can have a digital input
whose function is defined in the "4F" parameter plus another 2 power-
free digital inputs as an alternative to the measurement inputs Pr2
and Pr3.
To use these inputs as digital, set the relative parameter to "P2" or
"P3" = dG.
The configured function that these digital inputs perform is defined in
parameters "2F" and "3F".
The action time of digital input 2 can be delayed in parameter "2t"
while the action of digital inputs di3 and di4 is instantaneous and
cannot be delayed.
Parameters "1F", "2F", "3F", "4F" can be configured for the following
operations:
= 0 - Digital input not active
= 1 - Opening of the chamber door through normally open contact:
when the input is closed, the B4U alternately displays oP and the
variable set in the "dS" parameter. With this operating mode, the
action of the digital input also activates the time programmed in
parameter "oA", after which the alarm is activated to signal that the
door is open.
When the door is opened, if the ECONOMIC mode is activated, the
B4U returns to normal operation.
= 2 - Chamber door opening with fan lock through normally open
contact: similar to "1F / 2F / 3F / 4F" = 1 but with evaporator fan lock.
If open door alarms are generated (after time "oA") the output will be
deactivated.
= 3 - Chamber door opening with compressor and fan block and
through normally open contact: similar to "1F / 2F / 3F / 4F" = 2 but
with fan and compressor block. If open door alarms are generated
(after time "oA") the output will be deactivated.
= 4 - External alarm signaling with normally open contact: when the
digital input is closed and the alarm is activated, the B4U alternately
displays AL and the variable set in the "dS" parameter.
= 5 - External alarm signaling with deactivation of the control output
(excluding alarm and light outputs) by normally open contact: when
the digital input is closed, all the control outputs are deactivated and
the alarm is activated, the B4U displays alternately on the display AL
and the variable set in the "dS" parameter.
= 6 - Normal / Economic mode selection with normally open contact:
When the digital input is closed, the Economic mode will be selected.
When the input is open, Normal mode is selected.
= -1, -2, -3, etc. - Identical functions to the previous ones but with
inverse operating logic. Activating when the digital input contact
opens.
Note: In the event that the digital input is configured for this type of
function, the unit will consider the contacts as if they were in parallel
(considering this result as an OR function).
5.5 - CONFIGURATION OF THE OUTPUTS AND BUZZER
The parameters related to the configuration of the outputs are
contained in the group "-Ou".
The outputs of the B4U can be configured through the parameters
"o1", "o2", "o3" and "o4", with the following functions:
=
ot - Compressor / Solenoid Control or Cooling Element.
=
dF - Control of defrost heaters.
=
Fn - Evaporator fans control.
=
Au - Auxiliary output control.
=
En -
Allows the Control of a “silenceable” Alarm device through the
normally open and closed digital input during the alarm (See from
section 5.10 - ALARM FUNCTIONS).
=
AL: Allows the Control of a “non-silenceable” Alarm device through
the normally open and closed digital input during the alarm (See from
section 5.10 - ALARM FUNCTIONS).
=
An: Allows the control of an alarm device with memory function
through the normally open and closed digital input during the alarm
(See from section 5.10 - ALARM FUNCTIONS).
=
-t -
Allows the control of a “silenceable” alarm device through a
normally closed and open contact in alarm.
= -L
-
Allows the Control of a “non-silenceable” Alarm device through
the normally closed and open digital input during the alarm. (See from
section 5.10 - ALARM FUNCTIONS).
= -n
- Allows the control of an alarm device with memory function
through the normally open and closed digital input during the alarm
(See from section 5.10 - ALARM FUNCTIONS).
= on
- Allows the control of a device that must be activated whenever
the instrument has voltage. If the equipment is in Stand-by, the output
will remain deactivated. This control is ideal for lighting showcases,
anti-humidity heating elements or other various functions.
= HE
-
To control a heating device in neutral zone (“r.HC” = nr).
= L1
- Showcase light connected to Normal / Economic mode. The
output will turn on when Normal mode is active and turn off when
Economy mode is chaotic.
= L2
- Internal camera light. The output is always off and if the digital
input is configured as door opening "1F", "2F", "3F" = 1, 2, 3), it will
turn on with the door opening.
= -d
- Defrost output with normally open contact.
= A2
- Auxiliary output 2 control (Anti-fog resistance).
= oF - No function (output disabled).
If one of the outputs is configured as an auxiliary output ("o1", "o2",
"o3" and "o4" = Au), its function must be configured in the "Fo"
parameter and may be conditioned by the time programmed in the
"You" parameter.
The "Fo" parameter can be configured for the following functions:
= oF - No function
= 1 - Delayed regulation output.
The auxiliary output is activated with the delay programmed in the
parameter "tu" with respect to the output configured as "ot". The
output will deactivate as soon as the "ot" output is deactivated. This
type of operation can be used as control of a second compressor or
with a parallel control that is useful for the regulation process. It
prevents two devices from starting at the same time, causing high
occasional electricity consumption.
= 2 - Activation by LIGHT key or digital input. The output is activated
by pressing the LIGHT key or by activating the digital inputs, provided
they are configured as ("1F / 2F / 3F / 4F" = 9). The key and digital
input functions are bistable, which means that on the first press of the
key, the output turns on, while the second press turns off.
The output configured as auxiliary can be turned off automatically
after a certain time programmable in the "tu" parameter. With "tu" =
oF the output is activated and deactivated manually using the LIGHT
key, otherwise, the output, once activated, will automatically
deactivate after the programmed time. This function can be used, for
example, to control the camera light, anti-fog resistance or other
functions.
= 3 - Activation by LIGHT key or digital input even when the B4U is
in Stand-By. The output is activated in the same way as "Fo" = 2 even
when the B4U is in Stand-By.
If one of the outputs is configured as auxiliary output 2 ("1F / 2F / 3F
/ 4F" = A2), its activation and deactivation can be managed with the
DOWN key and operation can be conditioned by the time set in the
parameter "tA "present in group "-tS".
