References; Miscellaneous - Danfoss VLT AutomationDrive FC 302 Programming Manual

Introduction
U
M
Instantaneous motor voltage.
U
M,N
Rated motor voltage (nameplate data).
Torque
Illustration 1.1 Break-away Torque
Break-away torque
η
VLT
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 Table 1.3.
Stop command
See Control commands.

1.4.4 References

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.
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 set in
parameter 3-03 Maximum Reference.
®
VLT AutomationDrive FC 301/302 Programming Guide
Pull-out
rpm
MG33MI02 - Rev. 2013-11-20
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
parameter 3-02 Minimum Reference.

1.4.5 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 to +10 V DC.
Analog Outputs
The analog outputs can supply a signal of 0-20 mA, 4-20
mA.
Automatic Motor Adaptation, AMA
AMA algorithm determines the electrical parameters for
the connected motor at standstill.
Brake Resistor
The brake resistor is a module capable of absorbing the
brake power generated in regenerative braking. This
regenerative braking power increases the intermediate
circuit voltage and a brake chopper ensures that the
power is transmitted to the brake resistor.
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 (max. 40 mA) signal.
DSP
Digital Signal Processor.
ETR
Electronic Thermal Relay is a thermal load calculation
based on present load and time. Its purpose is to estimate
the motor temperature.
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Hiperface
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Hiperface is a registered trademark by Stegmann.
Initialising
If initialising is carried out (parameter 14-22 Operation
Mode), the frequency converter returns to the default
setting.
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.
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