Danfoss VLT HVAC Drive FC 102 Design Manual page 12

How to Read this Design Gui...
1 1
U
M
The instantaneous motor voltage.
U
M,N
The rated motor voltage (nameplate data).
Break-away torque
n
s
Synchronous motor speed.
2 × par . 1 − 23 × 60 s
ns =
par . 1 − 39
Torque
Illustration 1.1 Break-Away Torque Chart
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.
Stop command
See control commands parameter group.
References
Analog Reference
A signal transmitted to the 53 or 54, can be voltage or
current.
Binary Reference
A signal applied to the serial communication port (FS-485
terminal 68-69).
Bus Reference
A signal transmitted to the serial communication port (FC
port).
Preset Reference
A defined preset reference 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).
10
Design Guide
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rpm
Danfoss A/S © Rev. 05/2014 All rights reserved.
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
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
3-02 Minimum Reference.
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, 0–10 V DC.
Analog outputs
The analog outputs can supply a signal of 0–20 mA, 4–20
mA, or a digital signal.
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 screw and scroll
refrigeration compressors.
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.
Relay outputs
The frequency converter features two programmable relay
outputs.
ETR
Electronic thermal relay is a thermal load calculation based
on present load and time. Its purpose is to estimate the
motor temperature.
GLCP
Graphical local control panel (LCP102)
®
Hiperface
®
Hiperface is a registered trademark by Stegmann.
MG16C202