Technical
Manual
Temperature
Controller
SCN
‐
RT1
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Tel.: +49-2263-880 • Fax: +49-2263-4588 • [email protected] • www.mdt.de
37
4.6.4.1
Hysteresis
The
setting
of
the
hysteresis
is
used
for
calculating
the
points
of
switching
on
and
off.
This
occurs
under
consideration
of
the
current
adjusted
setpoint.
Example:
The
controller
is
adjusted
as
heating
with
and
a
basic
comfort
setpoint
of
21°C
and
a
hysteresis
of
2K.
So
the
controller
switches
the
control
value,
at
the
mode
comfort,
on
at
20°C
and
off
at
22°C.
To
note
is
that
a
big
hysteresis
generates
big
differences
of
the
room
temperature.
A
small
hysteresis
can
generate
an
almost
permanent
switching
process,
because
the
points
for
switching
on
and
off
are
very
close
to
each
other.
This
can
generate
a
fast
consumption
of
the
control
value.
