Danfoss VLT FC 100 Series Programming Manual page 9

Introduction
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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
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 set in
3-02 Minimum Reference.
Miscellaneous:
Analog Inputs
The analog inputs are used for controlling various
functions of the Adjustable frequency drive.
There are two types of analog inputs:
Current input, 0-20 mA and 4-20 mA
Voltage input, 0-10 V DC ()
Voltage input, -10 - +10 V DC (FC 102).
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
braking energy generated in regenerative braking. This
regenerative braking energy 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 Adjustable frequency drive.
Digital Outputs
The Adjustable frequency drive features two solid state
outputs that can supply a 24 V DC (max. 40 mA) signal.
DSP
Digital Signal Processor.
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VLT HVAC Drive Programming Guide
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
Initializing
If initialization is carried out (14-22 Operation Mode), the
Adjustable frequency drive 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 Adjustable frequency
drive. The control panel is detachable and can be installed
up to 10 ft [3 m] from the Adjustable frequency drive, i.e.,
in a front panel by means of the installation kit option.
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
Online/Offline Parameters
Changes to online parameters are activated immediately
after the data value is changed. Changes to offline
parameters are not activated until you enter [OK] on the
LCP.
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 line power until the display (LCP) 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.
MG11CD22 - VLT ® is a registered Danfoss trademark
®
®
is a registered trademark by Stegmann.
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