Technical
Manual
Temperature
Controller
SCN
‐
RT1
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Tel.: +49-2263-880 • Fax: +49-2263-4588 • knx@mdt.de • www.mdt.de
38
4.6.5
Direction
of
controller
The
following
settings
are
available
at
the
ETS
‐
Software:
Illustration
21:
Direction
of
controller
The
direction
of
the
controller
describes
the
behavior
of
the
control
value
by
a
changing
of
the
control
difference
at
rising
temperature.
The
control
value
can
react
normal
or
inverted
to
a
rising
temperature.
The
direction
of
the
controller
can
be
adjusted
for
all
control
values
(PI
‐
control
continuous,
PI
‐
control
switching
and
2
‐
Step
control).
An
inverted
control
value
is
for
adaption
to
normally
opened
valves
at
the
2
‐
Step
control
and
at
the
PI
‐
control
switching.
An
inverted
control
value
means
for
the
single
control
values,
by
controller
type
heating,
the
following
adjustments
PI
‐
control
continuous
The
control
value
falls
at
raising
regular
difference
and
rises
at
falling
regular
difference.
PI
‐
control
switching
The
ratio
between
duration
of
switching
on
to
the
whole
PWM
cycletime
raise
by
falling
temperature
and
falls
by
raising
temperature.
2
‐
Step
control
The
controller
switches
on
at
the
normal
point
for
switching
off
and
switches
off
at
the
normal
point
for
switching
on.
