Danfoss VLT FC 100 Series Programming Manual page 146

Parameter Description
20-35 Fan 1 Area [in2]
Range: Function:
Used for setting the area of the air ducts in
connection with feedback conversion
pressure/velocity to flow. The unit (in
determined by the setting of 0-03 Regional
Settings. Fan 1 is used with feedback 1. In
case of flow difference control, set
20-20 Feedback Function to [1] Difference, if
flow fan 1 – flow fan 2 is to be controlled.
750 [0–
in 2 15000 in 2 ]
*
2
20-36 Fan 2 Area [m ]
Range: Function:
Used for setting the area of the air ducts
in connection with feedback conversion
pressure/velocity to flow. The unit (m
determined by the setting of 0-03 Regional
Settings. Fan 2 is used with feedback 2. In
case of flow difference control, set
20-20 Feedback Function to [1] Difference, if
flow fan 1 – flow fan 2 is to be controlled.
0.500 [0.000–
m2 10.000 m2]
*
2
20-37 Fan 2 Area [in ]
Range: Function:
Used for setting the area of the air ducts in
connection with feedback conversion
pressure/velocity to flow. The unit (in
determined by the setting of 0-03 Regional
Settings. Fan 2 is used with feedback 2. In
case of flow difference control, set
20-20 Feedback Function to [1] Difference, if
flow fan 1 – flow fan 2 is to be controlled.
750 [0–
in 2 15000 in 2 ]
*
20-38 Air Density Factor [%]
Range: Function:
100 % [50 - 150 Set the air density factor for conversion
*
%] from pressure to flow in % relative to the
air density at sea level at 68°F [20°C]
(100% ~ 1.2 kg/m
3.18.4 20-6* Sensorless
Parameters for Sensorless. See also 20-00 Feedback 1
Source, 18-50 Sensorless Readout [unit], 16-26 Power Filtered
[kW] and 16-27 Power Filtered [hp].
®
VLT HVAC Drive Programming Guide
NOTE!
Sensorless unit and Sensorless Information requires set-up
by MCT 10 Set-up Software with sensorless specific plug-in.
20-60 Sensorless Unit
2
) is
Option:
[20]
[21]
[22]
[23]
[24]
[25]
[70]
[71]
[72]
2
) is
[73]
[74]
[75]
[120] GPM
[121] gal / sec.
[122] gal/min
[123] gal / hr.
[124] CFM
[125] ft³/s
[126] ft³/min
[127] ft³/h
[170] psi
[171] lb/in²
2
) is
[172] in. wtr. gage
[173] ft WG
[174] in Hg
20-69 Sensorless Information
Range:
0
3.18.5 20-7* PID autotuning
The adjustable frequency drive PID Closed-loop controller
(parameter group 20-**, FC Drive Closed-loop) can be
auto-tuned, simplifying and saving time during commis-
3
).
sioning, while ensuring accurate PID control adjustment.
To use auto-tuning, it is necessary for the Adjustable
frequency drive to be configured for closed-loop in
1-00 Configuration Mode.
A graphical local control panel (LCP) must be used in order
to react on messages during the autotuning sequence.
MG11CD22 - VLT ® is a registered Danfoss trademark
Function:
Select the unit to be used with
18-50 Sensorless Readout [unit].
liter / sec.
liter / min
liter / hr.
m³ / sec.
m³/min
m³ / hr.
mbar
bar
Pa
kPa
m WG
mm Hg
Function:
[0 - 0 ] View information about the sensor-less data.
*
3 3
3-119