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VLT® HVAC Drive FC 131
Programming Guide
The graphic local control panel interface for control and programming of the drive. The display is graphic and the panel is used to
show process values. The GLCP has storing and copy functions.
lsb
Least significant bit.
msb
Most significant bit.
MCM
Short for mille circular mil, an American measuring unit for cable cross-section. 1 MCM = 0.5067 mm
On-line/off-line parameters
Changes to on-line parameters are activated immediately after the data value is changed. To activate changes to offline parameters,
press [OK].
PI controller
The PI controller maintains the desired speed, pressure, temperature, and so on, by adjusting the output frequency to match the
varying load.
Process PID
The PID control maintains speed, pressure, and temperature by adjusting the output frequency to match the varying load.
PCD
Process control data.
PFC
Power factor correction.
Power cycle
Switch off the mains until the display (LCP) is dark, then turn power on again.
Power factor
The power factor is the relation between I
harmonic currents.
3 × U × I
cosϕ1
1
Power factor =
3 × U × I
RMS
For VLT® HVAC Drive FC 131 drives, cosϕ1 = 1, therefore:
I1 × cosϕ1
Power factor =
=
I
RMS
The power factor indicates to which extent the drive imposes a load on the mains supply. The lower the power factor, the higher the
I
for the same kW performance.
RMS
2
2
2
I
= I
+ I
+ I
+ .. + I
RMS
1
5
7
In addition, a high power factor indicates that the different harmonic currents are low.
The built-in DC coils produce a high-power factor, minimizing the imposed load on the mains supply.
Pulse input/incremental encoder
An external, digital pulse transmitter used for feeding back information on motor speed. The encoder is used in applications where
great accuracy in speed control is required.
RCD
Residual current device.
Setup
Save parameter settings in 2 setups. Change between the 2 parameter setups and edit 1 setup while another setup is active.
SFAVM
Acronym describing the switching pattern stator fluxoriented asynchronous vector modulation.
Slip compensation
The drive compensates for the motor slip by giving the frequency a supplement that follows the measured motor load, keeping the
motor speed almost constant.
Smart logic control (SLC)
The SLC is a sequence of user-defined actions executed when the smart logic controller evaluates the associated user-defined
events as true.
STW
Danfoss A/S © 2022.05
and I
, where I
1
RMS
I
1
I
RMS
2
n
is the fundamental current, and I
1
2
.
is the total RMS current including
RMS
AU370727746889en-000101 / 130R0994 | 195
Appendix
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