Order number: 900350.011
V2.70
Seite 14
Control function
Heating phase without manual intervention
Heating phase after activation (refer to Figure 1):
After activation and start of the controller, a slow
heating phase will always follow when the fat is cold.
This phase is finished when the setpoint is reached,
at the latest. In this slow heating phase, the heating
relay clocks, i.e. with the on time set in parameter
"P71" being followed by the off time set in parameter
"P72" and vice versa. Slow heating is to ensure that
congealed fat is heated up gently at the start of
operation. Via parameter "P73", you can stop the
slow heating phase before the setpoint is reached. If
this is not desired, set P73=0.0 K.
Figure 1
Heating phase after slight cooling (refer to Figure 2):
After minor cooling to temperatures above 50 °C,
e.g. loading of small quantities of cold fat, the normal
heating function of the controller is maintained. The
new heating phase will not be slowed down, the
heating relay will not be clocked with a thermostat
function defined via the parameterisation. If PID
function is specified, the heating relay will only clock
within this range. The clock end defined via
parameter "P73" does not have any influence.
Figure 2
Heating phase after significant cooling
(refer to
Figure 3):
After significant cooling to temperatures below 50
°C, e.g. loading of large quantities of cold fat, the
slow heating function is activated again. The heating
relay clocks again like in the initial heating phase,
until the setpoint or the clock end below the setpoint
defined in parameter "P73" is reached again. This is
to ensure gentle heating of the reloaded fat.
Figure 3
Control after heating
After the heating phase, the controller works with the
PID function based on parameter group "P11" to
"P14".
Heating phase with manual intervention
Heating phase after activation
(refer to Figure 4):
After activation and start, the slow heating phase will
start without manual intervention. By pressing the
quick heating button MELT/TURBO, you can switch
over to the normal heating function. Now, the fat will
be heated more quickly. The heating relay will no
longer clock based on the times set in parameters
"P71" and "P72" but based on the PID function set
via the PID parameters. The clock end defined via
parameter "P73" does not have any influence after
the manual intervention.
To undo the change-over, press the MELT/TURBO
button again. Now, the heating relay will clock like
before the manual change-over again.
The manual change-over function can be used for
reducing the heating phase if the fat has melted
visibly and can be heated at a higher rate without any
damage. Manual change-over between slow heating
and turbo heating is possible only if the controller
actually is in the heating phase, i.e. below the
threshold set via parameter "P73". Above this
threshold, the turbo button has no function.
Heating phase
after activation
Setpoint
Heating phase
after minor cooling
Setpoint
Heating phase
after significant cooling
Setpoint
Содержание ST552 Glass
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