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Motor controllers
M
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When the wind speed (frequency of the wind sensor pulse signal W) rises above the set threshold level, the local OPEN (A) and
CLOSE (Z) inputs are completely blocked. The light sensor (S) also has no effect on the controller under this condition. The
inputs are enabled again after the wind speed drops below the set threshold level.
The SMS 2 dynamically adjusts the response delay for wind „t
on
“ (that means the higher the wind speed overstepping, the
shorter the response time).
Runtime diagram „Wind
Example: t
on
= 15s (dynamically); t
off
= 15s (fixed);t
LZ
= 240s (programmed); signal threshold wind = 40 km/h
Beaufort scale by phenomenological criteria:
Wind speed
[Bft]
Wind speed
[km/h]
Designation
Effect on land
0
0-1
Calm
Calm. Smoke rises vertically.
1
1-5
Light air
Smoke drift indicates wind direction. Leaves and wind vanes are stationary.
2
6-11
Light breeze
Wind felt on exposed skin. Leaves rustle. Wind vanes begin to move.
3
12-19
Gentle breeze
Leaves and small twigs constantly moving, light flags extended.
4
20-28
Moderate breeze
Dust and loose paper raised. Small branches begin to move.
5
29-38
Fresh breeze
Branches of a moderate size move. Small trees in leaf begin to sway.
6
39-49
Strong breeze
Large branches in motion. Whistling heard in overhead wires. Umbrella use beco-
mes difficult. Empty plastic bins tip over.
7
50-61
High wind
Whole trees in motion. Effort needed to walk against the wind.
8
62-74
Gale, fresh gale
Some twigs broken from trees. Cars veer on road. Progress on foot is seriously
impeded.
9
75-88
Strong/severe gale
Some branches break off trees, and some small trees blow over. Construction/tem-
porary signs and barricades blow over.
(only SMS 1)
wind speed
time
wind speed trend
Group
mode
Runtime
mode
dynamically
deactivated
deactivated
Local inputs
Up (A), Down (Z), Sensor (S)
