GE AF-650 GP Programming Manual page 7

Introduction
1
1
Keypad
The keypad makes up a complete interface for control and
programming of the frequency converter. The keypad is
detachable and can be installed up to 3 m from the
frequency converter, i.e. in a front panel with the instal-
lation kit option.
Logic Controller (LC)
The LC is a sequence of user defined actions executed
when the associated user defined events are evaluated as
true by the Logic Controller. (Parameter group LC-##).
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 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 four Set-ups. Change between
the four parameter Set-ups and edit one Set-up, while
another Set-up is active.
SFAVM
Switching pattern called Stator Flux oriented Asynchronous
Vector Modulation (F-37 Adv. 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.
STW
Status Word
6
AF-650 GP Programming Guide
Drive Standard Bus
Includes RS-485 bus with drive protocol or MC protocol.
See O-30 Protocol.
Thermistor
A temperature-dependent resistor placed where the
temperature is to be monitored (frequency converter or
motor).
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
2
.
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 cutting off 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. Trip may not be used for personal safety.
VT Characteristics
Variable torque characteristics used for pumps and fans.
60° AVM
Switching pattern called 60° Asynchronous Vector
Modulation (F-37 Adv. Switching Pattern).
Power Factor
The power factor is the relation between I
Power factor
The power factor for 3-phase control:
I 1
=
The power factor indicates to which extent the frequency
converter imposes a load on the mains supply.
The lower the power factor, the higher the I
same kW performance.
I RMS
In addition, a high power factor indicates that the different
harmonic currents are low.
The frequency converters' built-in DC coils produce a high
power factor, which minimizes the imposed load on the
mains supply.
DET-618C
x U x I cos
3 ϕ
1
=
3 x U x I RMS
I
x cos ϕ1 1
= since cos ϕ1 = 1
I RMS I RMS
2 + 2 + 2 + .. + 2
I I I I n
=
1 5 7
and I .
1 RMS
for the
RMS