Ascon Tecnologic - KX 6 - ENGINEERING MANUAL - Vr. 0.1
PAG. 18
8.4 AutomAtiC mode
8.4.1 Keyboard functions when the instrument
is in Auto mode
Performs the action programmed by [74] uSrb
(
button function during RUN TIME) parameter.
Enters the parameter modification procedures.
Starts the “Direct set point modification” function (see
below).
Displays the “Additional information” (see below).
8.4.2 direct set point modification
This function allows to modify quickly the set point value
selected by [67] A.SP (selection of the active Set point)
currently in progress.
The instrument is showing the “standard display”.
1.
Push
button.
The upper display shows the acronym of the selected set
point (e.g. SP2) and the middle display will show its value.
2.
By
and
buttons, assign to this parameter the
desired value;
3.
Do not push any button for more than 5 second or
push the
button. In both cases the instrument stores
the new value and returns to the Standard display.
note:
If the selected set point has not been promoted to the
Operator level, the instrument allows you to see the
value but not to modify it.
8.4.3 Additional information
This instrument is able to show you the power output
calculated by the PID.
1.
While the instrument is showing the Standard display
push
button.
The middle display will show
H
or
c
followed by a number.
This value is the current output power calculated by the
PID. The
H
indicates that the action is a Heating action
while the
c
indicates that the action is a Cooling action.
2.
Push
button again. The instrument returns to the
Standard display.
note:
The additional information visualization is subject to
a time out. If no button is pressed for more than 10
second the instrument automatically returns to the
Standard display.
8.4.4 display management
This instrument allows you to program the time out of the
display (see parameter [78] diS.t).
This function allows to turn OFF the display when no alarm
is present and no action is made on the instrument.
When [78] diS.t is different from OFF (always on display) and
no button is pressed for more than the programmed time
out, the display goes OFF and only 4 segments of the less
significant digit are turned ON in sequence in order to show
that the instrument is working correctly.
If an alarm occurs or a button is pressed, the display returns
to the normal operation.
8.4.5 the display colour shows the deviation
This instrument allows to program the deviation (PV - SP) for
colour display change (see parameter [77] AdE).
In this way the upper display will be:
–
Amber when PV is lower than SP - AdE;
–
Green when (SP - AdE) < PV<SP + AdE);
–
Red when PV is higher than SP + AdE.
8.5 mAnuAl mode
This operative mode allows you to deactivate automatic
control and manually set valve position.
When the instrument is in manual mode, the upper display
shows the measured value, the middle display shows the
power output [preceded by
H
(for heating action) or
C
(for
cooling action)] while the lower display continue to show the
valve position (measured or calculated according to [58] Pot
parameter setting).
The MAN LED is lit.
When manual control is selected, the instrument will start to
operate with the same power output as the last one supplied
by automatic mode and it can be modified using the
and
buttons.
notes: 1.
During manual mode, the alarms are operative.
2.
If you set manual modes during self-tune
execution, the self-tune function will be aborted.
8.6 stAnd by mode
This operative mode also deactivates the automatic control
but forces the control output (valve position) to zero.
In this mode the instrument operates as an indicator.
When the instrument is in stand by mode the upper display
will show the measured value while the middle display will
show alternately the set point and the message “St.bY”.
notes: 1.
During stand by mode, the relative alarms are
disabled while the absolute alarms are operative
or not according to the ALxo (Alarm x enabling
during Stand-by mode) parameter setting.
2.
If you set stand by mode during self-tune
execution, the self- tune function will be aborted.
3.
When the instrument is swapped from stand
by to auto modes, the instrument will start
automatically the alarm masking, the soft start
functions and the auto-tune (if programmed).
