ZIEHL-ABEGG FXET4AMQ, Operating Instructions Manual

Page: 46 / 87

Alarm sensors
With “ Alarm Sensors ” = “ OFF ” (factory setting). Indicated
sensor disturbances are displayed as “ Message ” alternating
to the actual value and stored in the menu of “ Events ” .
Sensor 1
Alarm sensors
With
“
AlarmSensors
”
=
“
ON
”
areindicated sensor disturban-
ces as “ Alarm ” alternating to the actual value and stored in
the menu of “ Events ” .
Indication via relays is possible ( IO Setup / function relay
outputs).
Sensor 1
9.9.5 Limit
Limit
After allocation of a digital input ( IO Setup) an adjustable limitation of the modulation
can be activated via a digital input ( “ D1 ” , “ D2 ” , ..).
As long as no allocation has been carried out “ IO Setup ” . Display:
|
- - - -
|
“ Limit value ” = max. possible modulation (e.g.
speed reduction during night operation by
time switch).
Setting range:
“ Limit ” = “ n-max ” up to “ n-min ” .
Factory setting: 100 % max. modulation, i.
e. no limit.
Setting depending on device tye in: % or rpm.
nM
50 %
100 %
D
P
Min.
L= 70% Min.= 0 % Max. = 100 %
50 %
R
0 %
I
S
100 %
I
L
L = 70% Min. = 35 % Max. = 85 %
25.03.2013
v_limit.vsd
Limit (idealized principle diagram)
nM Motor speed
L Limit
S Setpoint
R Pband
D Speed controller: setting signal
P P-controller: control deviation
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
Operating Instructions Fcontrol – model series FXET4/6/10AMQ Programming
L-BAL-E079-GB 1706 Index 008 Part.-No.
46/87