Order number: 900350.011
V2.70
Seite 13
Selection parameter post-frying time
With parameter P77, you can define if the frying time is exactly the programmed time or if the frying time is to
be extended if the fried material causes a temperature decrease.
Extension of the frying time, also referred to as elastic time or post-frying time, depends on the deviation from
the setpoint. If the setpoint is exceeded, the time is reduced.
Actual value
P77
Effective frying
time
180 °C
0
100 sec.
150 °C
0
100 sec.
180 °C
1
100 sec.
150 °C
1
120 sec.
180 °C
10
100 sec.
150 °C
10
135 sec.
180 °C
20
100 sec.
150 °C
20
150 sec.
125 °C
20
210 sec.
100 °C
20
300 sec.
Table:
Setpoint 180 °C, selected frying time 100
sec.
Feedback in case of heating modes "Gas" and "Gas+fan"
In the case of heating modes "Gas" and "Gas + Fan", a feedback signal detected via switching input E2 can
be used. The feedback confirms that the burner has started properly. Otherwise, the control is stopped. The
feedback signal is considered in different ways in the case of these heating modes.
Heating mode "Gas"
Control at the heating output is effected only if the feedback is present on switching input E2. Without the
feedback, the heating relay is not switched on. If the feedback is missing during the heating process, the
relay is switched off. In this heating mode, no error message is triggered nor is it necessary to acknowledge
an error.
Heating mode "Gas+Fan"
Restart with controller switched off:
Control at the heating input will be activated upon request by the controller part. After that, the system waits
for receipt of the feedback (for the time set in parameter"P58"). If the feedback is received at switching input
E2 of if it is already present at the time of the request, the control operation is continued. If not, the control
operation is switched off. The "HEAT" lamp flashes slowly signalling the start error. To acknowledge and
restart the control operation, press the "OFF" button, i.e. switch to Standby Off and on again.
Burner failure with restart chance:
If the feedback fails during the control operation, the fan is switched back to minimum speed according to
parameter "P61" immediately. The system waits for the restart of the burner and the return of the feedback
signal (for the time set in parameter "P58"). The "HEAT" lamp flashes quickly signalling the restart chance. If
the feedback signal is received again, the control operation is continued. If the feedback is not received within
this time, the control operation is switched off. The "HEAT" lamp flashes slowly signalling the burner failure.
To acknowledge and restart the control operation, press the "OFF" button, i.e. switch to Standby Off and on
again.
Deactivation of feedback
Via parameter "P53", you can deactivate the feedback function by reversing the switching mode of switching
input E2. In this case, the controller will interpret the open switching input, to which nothing may be
connected, as a feedback signal. Independent of this, the feedback will also be deactivated if you assign
other functions to the switching input via "P52".
The control function of the deep fryer controller is explained in the following and will always be valid while the
controller is switched on.
Sollwert > Istwert
100 °C
10°C
-10°C
∆
T
P77 = 1
P77 = 10
P77 = 20
1,0
2,0
Wichtungsfaktoren
bei variabler Backzeit
t
Var
= t
Fest
* f(
∆
T,T
IST
)
1,5
f(
∆
T)
Weighing factors in case
of variable frying time
Setpoint > actual value
