References; Miscellaneous - Danfoss VLT AutomationDrive FC 302 Programming Manual

Introduction
1 1
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 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

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 3-03 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 is set in
parameter 3-02 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 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.
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®
VLT AutomationDrive FC 301/302
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.
Hiperface
Hiperface
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.
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 storage 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 = 0.5067 mm
Danfoss A/S © Rev. 10/2014 All rights reserved.
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is a registered trademark by Stegmann.
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MG33MJ02