Danfoss VLT AutomationDrive FC 301 Programming Manual page 7

Introduction
LCP
The Local Control Panel makes up a complete interface for
control and programming of the frequency converter. The
control panel is detachable and can be installed up to 3 m
from the frequency converter, i.e. in a front panel with the
installation kit option.
NLCP
Numerical Local Control Pandel interface for control and
programming of the frequency converter. The display is
numerical and the panel is used to display process values.
The NLCP has no 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 = 0.5067mm
On-line/Off-line Parameters
Changes to on-line parameters are activated immediately
after the data value is changed. Press [OK] to activate
changes to off-line parameters.
Process PID
The PID control maintains the desired speed, pressure,
temperature, etc. by adjusting the output frequency to
match the varying load.
PCD
Process Control Data
Power Cycle
Switch off the mains until display (LCP) is dark – then turn
power on again.
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.
Set-up
Save parameter settings in 4 Set-ups. Change between the
4 parameter Set-ups and edit one Set-up, while another
Set-up is active.
SFAVM
Switching pattern called Stator Flux oriented Asynchronous
Vector Modulation (14-00 Switching Pattern).
Slip Compensation
The frequency converter compensates for the motor slip
by giving the frequency a supplement that follows the
measured motor load keeping the motor speed almost
constant.
®
VLT AutomationDrive FC 301/302 Programming Guide
Smart Logic Control (SLC)
The SLC is a sequence of user-defined actions executed
when the associated user-defined events are evaluated as
true by the Smart Logic Control. (Parameter group 13-**
Smart Logic Control (SLC).
STW
Status Word
FC Standard Bus
Includes RS-485 bus with FC protocol or MC protocol. See
8-30 Protocol.
THD
Total Harmonic Distortion states the total contribution of
harmonic.
Thermistor
A temperature-dependent resistor placed where the
temperature is to be monitored (frequency converter or
motor).
2 .
Trip
A state entered in fault situations, e.g. if the frequency
converter is subject to an over-temperature or when the
frequency converter is protecting the motor, process or
mechanism. Restart is prevented until the cause of the
fault has disappeared and the trip state is cancelled by
activating reset or, in some cases, by being programmed
to reset automatically. Trip may not be used for personal
safety.
Trip Locked
A state entered in fault situations when the frequency
converter is protecting itself and requiring physical
intervention, e.g. if the frequency converter is subject to a
short circuit on the output. A locked trip can only be
cancelled by disconnecting mains, removing the cause of
the fault, and reconnecting the frequency converter.
Restart is prevented until the trip state is cancelled by
activating reset or, in some cases, by being programmed
to reset automatically. The Trip Locked state may not be
used for personal safety.
VT Characteristics
Variable torque characteristics used for pumps and fans.
VVC
If compared with standard voltage/frequency ratio control,
Voltage Vector Control (VVC
and the stability, both when the speed reference is
changed and in relation to the load torque.
60° AVM
Switching pattern called 60° Asynchronous Vector
Modulation (14-00 Switching Pattern).
Power Factor
The power factor is the relation between I
Power factor =
The power factor for 3-phase control:
I 1 x cos ϕ1
=
MG33MH02 - Rev. 2013-09-30
plus
plus
) improves the dynamics
3 x U x I 1 cos ϕ
x U x I RMS
3
I 1
= since cos ϕ1 = 1
I RMS I RMS
1
and I .
1 RMS
5
1