9.9.6
Minimum speed cut off
Min. speed cut off
This function is primarily signi
fi
cant for installation of the device as a pure P Controller
in refrigeration and air-conditioning technology.
For operation mode speed controller
1.01
without function!
Msco = OFF
(factory setting)
If no
“
Min. speed
”
is adjusted, the fan stops with
reaching the desired value.
If
“
Min. speed
”
is adjusted (e.g. 20%), then no dis-
connection of the fan takes place. I.e., always a
minimum ventilation is ensured (fan does not go
under setting
“
Min. speed
”
).
Msco. e.g. -2.0 K
It takes place a disconnection from setting
“
Min.
speed
”
to
“
0
”
, if the given difference is reached re-
lated to the desired value.
At a plus value (+) before reaching the desired value
At a minus value (-) after falling below the desired
value.
nM
50 %
100 %
I
Min.
Min. 35 %
Max. = 100 %
20 °C
S
7 K
R
27 °C
-2.0 K
10.05.2007
v_min_luft_abschalt.vsd
Minimum speed cut off (idealized principle diagram)
nM
Motor speed
S
Setpoint
R
Pband
I
Actual value
9.9.7
Group control
9.9.7.1
Control group 2 via 0 - 10 V output
Group 2 ON value
Group 2 ON value
Switch-on value for Group2
Setting range: 0 - 100 %
Factory setting: 50 % *
OFF Value Group2
OFF Value Group2
Switch-off value for group2
Setting range: 0 - 100 %
Factory setting: 45 % *
nmin at Group2
nmin at Group2
Minimum Value for Group2
Setting range: 0 - 100 %
Factory setting: 20 % *
*
As long as in IO Setup
“
A Function
”
not programmed to
|
5A
|
, display:
|
- - - -
|
Function
•
Group 1 continuously controlled by the device
’
s
“
Master
”
power unit (
motor connection).
•
Group 2 continuously controlled by a second
“
Slave
”
power unit, this is controlled by the
“
Master
”
by a 0 - 10 V signal. IO Setup: A Function =
|
5A
|
(Group control).
Operating Instructions
Fcontrol
–
model series FXDM
Programming
L-BAL-E072-GB 1642 Index 008
Part.-No.
55/105
