References; Miscellaneous - GE AF-650 GP Programming Manual

Introduction
Break-away torque
Illustration 1.1 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 Group 1 control commands
- see Table 1.2.
Stop command
A stop command belonging to Group 1 control commands
- see Table 1.2.

1.3.4 References

Advanced Vector Control
If compared with standard voltage/frequency ratio control,
advanced 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 (voltage
or current).
Binary reference
A signal transmitted to the serial communication port.
Preset reference
A defined preset reference to be set from -100% to +100%
of the reference range. Selection of 8 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 is set in
parameter F-53 Maximum Reference.
DET-618D
AF-650 GP™ Programming Guide
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 is set in
parameter F-52 Minimum Reference.

1.3.5 Miscellaneous

Analog inputs
The analog inputs are used for controlling various
functions of the frequency converter.
There are 2 types of analog inputs:
Current input, 0–20 mA, and 4–20 mA
Voltage input, -10 V DC 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 2 solid-state outputs that
can supply a 24 V DC (maximum 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.
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 (10 ft) from the
frequency converter, that is, in a front panel with the
installation 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.
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