References; Miscellaneous - GE AF-650 GP Programming Manual

Introduction
n
s
Synchronous motor speed
2 × par . F − 04 × 60 s
n s =
par . P − 01
n
slip
Motor slip.
P
M,N
Rated motor power (nameplate data in kW or HP).
T
M,N
Rated torque (motor).
U
M
Instantaneous motor voltage.
U
M,N
Rated motor voltage (nameplate data).
Illustration 1.1 Break-away Torque
Break-away torque
η
DRIVE
The efficiency of the frequency converter is defined as the
ratio between the power output and the power input.
Start-disable command
A stop command belonging to the group 1 control
commands - see this group.
Stop command
See Control commands.

1.4.4 References

Advanced Vector Control
If compared with standard voltage/frequency ratio control,
(Adv. Vector Control) improves the dynamics and the
stability, both when the speed reference is changed and in
relation to the load torque.
Analog Reference
A signal transmitted to the analog inputs 53 or 54, can be
voltage or current.
Binary Reference
A signal transmitted to the serial communication port.
AF-650 GP Programming Guide
Preset Reference
A defined preset reference to be set from -100% to +100%
of the reference range. Selection of eight preset references
via the digital terminals.
Pulse Reference
A pulse frequency signal transmitted to the digital inputs
(terminal 29 or 33).
Ref
MAX
Determines the relationship between the reference input
at 100% full scale value (typically 10 V, 20 mA) and the
resulting reference. The maximum reference value set in
F-53 Maximum Reference.
Ref
MIN
Determines the relationship between the reference input
at 0% value (typically 0 V, 0 mA, 4 mA) and the resulting
reference. The minimum reference value set in
F-52 Minimum Reference.

1.4.5 Miscellaneous

Analog Inputs
The analog inputs are used for controlling various
functions of the frequency converter.
There are two types of analog inputs:
Current input, 0-20 mA and 4-20 mA
Voltage input, -10 to +10 V DC.
Analog Outputs
The analog outputs can supply a signal of 0-20 mA, 4-20
mA.
Auto tune
Auto tune algorithm determines the electrical parameters
for the connected motor at standstill.
CT Characteristics
Constant torque characteristics used for all applications
such as conveyor belts, displacement pumps and cranes.
Digital Inputs
The digital inputs can be used for controlling various
functions of the frequency converter.
Digital Outputs
The frequency converter features two Solid State outputs
that can supply a 24 V DC (max. 40 mA) signal.
DSP
Digital Signal Processor.
Electronic thermal overload
Electronic thermal overload is a thermal load calculation
based on present load and time. Its purpose is to estimate
the motor temperature.
Intermittent Duty Cycle
An intermittent duty rating refers to a sequence of duty
cycles. Each cycle consists of an on-load and an off-load
period. The operation can be either periodic duty or non-
periodic duty.
DET-618C
1
1
5