Technisches
Manual
Weather
station
SCN
‐
WS3HW.01
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Tel.: +49-2263-880 • Fax: +49-2263-4588 • knx@mdt.de • www.mdt.de
17
As
well
for
the
understepping
as
for
the
exceedance
of
the
threshold
values
a
delay
can
be
parameterize.
This
delay
indicates
how
long
the
measured
brightness
value
must
exceed
or
underrun
the
adjusted
threshold
value.
In
order
that
a
short
darkening,
e.g.
caused
by
the
passing
of
clouds,
causes
a
permanent
driving
of
the
blinds/shutter,
a
sufficiently
long
value
should
be
adjusted
here.
So
the
treshold
value
1
or
2
is
only
active
if
an
exceedance
or
an
undercut
is
measured
for
the
adjusted
period
of
time.
Via
the
corresponding
communication
object,
every
threshold
value
can
send
its
current
state.
So
you
get
a
steady
feedback
if
the
trshold
value
is
active
or
not.
The
polarity
and
the
sending
behaviour
of
this
object
can
be
parameterized
individually.
There
is
a
common
block
object
available
for
both
threshold
values.
In
the
submenu
for
each
threshold
value
can
be
defined
whether
the
block
object
should
be
used
for
this
threshold
value
or
not.
If
the
object
is
in
us
e
for
this
threshold,
the
threshold
value
will
be
blocked
with
a
logical
“1”.
The
unblocking
process
can
be
done
with
a
logical
“0”.
Additional
the
threshold
value
can
be
modified
via
an
object.
If
the
function
“Modifable
threshold
value”
is
adjusted
as
“via
objects”,
two
additional
obejcts
will
appear,
one
for
the
upper
limit
and
one
for
the
lower
limit
of
the
threshold
value.
Via
theses
both
objects
a
new
value
can
be
assigned
to
the
the
first
threshold
value.
The
chart
shows
the
relevant
communication
objects
for
the
threshold
values:
Number
Name
Function
Length
Usage
1
Brightness
East
Treshold
value
1
1
Bit
indicates
if
threshold
value1
is
active
2
Brightness
East
Treshold
value
2
1
Bit
indicates
if
threshold
value2
is
active
3
Brightness
East
Treshold
value
1
upper
limit
2
Byte
Writing
a
new
upper
limit
for
threshold
value
1
4
Brightness
East
Treshold
value
1
lower
limit
2
Byte
Writing
a
new
lower
limit
for
threshold
value
1
5
Brightness
East
Block
object
for
threshold
value
1
Bit
Blocking
the
threshold
values
18
Brightness
South
Treshold
value
1
1
Bit
indicates
if
threshold
value1
is
active
19
Brightness
South
Treshold
value
2
1
Bit
indicates
if
threshold
value2
is
active
20
Brightness
South
Treshold
value
1
upper
limit
2
Byte
Writing
a
new
upper
limit
for
threshold
value
1
21
Brightness
South
Treshold
value
1
lower
limit
2
Byte
Writing
a
new
lower
limit
for
threshold
value
1
21
Brightness
South
Block
object
for
threshold
value
1
Bit
Blocking
the
threshold
values
35
Brightness
West
Treshold
value
1
1
Bit
indicates
if
threshold
value1
is
active
36
Brightness
West
Treshold
value
2
1
Bit
indicates
if
threshold
value2
is
active
37
Brightness
West
Treshold
value
1
upper
limit
2
Byte
Writing
a
new
upper
limit
for
threshold
value
1
38
Brightness
West
Treshold
value
1
lower
limit
2
Byte
Writing
a
new
lower
limit
for
threshold
value
1
39
Brightness
West
Block
object
for
threshold
value
1
Bit
Blocking
the
threshold
values
Chart
9:
Communication
objekts
threshold
values