Danfoss VLT HVAC Basic Drive FC 100 Series Programming Manual page 10

Introduction
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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
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.
CTW
Control Word
Digital Inputs
The digital inputs can be used for controlling various
functions of the Adjustable frequency drive.
ETR
Electronic Thermal Relay is a thermal load calculation
based on present load and time. Its purpose is to estimate
the motor or Adjustable frequency drive temperature.
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-sections. 1 MCM = 0.5067 mm
Process PI
The PI control maintains the desired speed, pressure,
temperature, etc. by adjusting the output frequency to
match the varying load.
Power Cycle
Switch off line power until the display (LCP) is dark – then
turn power on again.
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VLT HVAC Basic Drive Programming Guide
RCD
Residual Current Device.
Set-up
You can save parameter settings in two set-ups. Change
between the two parameter set-ups and edit one set-up,
while another set-up is active.
Slip Compensation
The adjustable frequency drive compensates for the motor
slip by giving the frequency a supplement that follows the
measured motor load, keeping the motor speed almost
constant.
Slip compensation is default set to off.
Smart Logic Control (SLC)
The SLC is a sequence of user-defined actions executed
when the associated user-defined events are evaluated as
true by the Smart Logic Controller. (Parameter group 13-**
Smart Logic Control (SLC).)
STW
Status Word
Adjustable Frequency Drive Standard Bus
Includes RS-485 bus with FC protocol. See 8-30 Protocol.
Thermistor
A temperature-dependent resistor placed where the
temperature is to be monitored (adjustable frequency drive
or motor).
Trip
A state entered in fault situations, e.g., if the adjustable
frequency drive is subject to an over-temperature or when
the adjustable frequency drive is protecting the motor,
process or mechanism. Restart is prevented until the cause
of the fault has disappeared and the trip state is canceled
by activating reset or, in some cases, by being
programmed to reset automatically. Trip may not be used
for personal safety.
Trip Lock
A state entered in fault situations when the adjustable
frequency drive is protecting itself and requiring physical
intervention, e.g., if the adjustable frequency drive is
subject to a short circuit on the output. A locked trip can
only be canceled by cutting off line power, removing the
cause of the fault, and reconnecting the adjustable
frequency drive. Restart is prevented until the trip state is
canceled by activating reset or, in some cases, by being
programmed to reset automatically. Trip may not be used
2
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for personal safety.
VT Characteristics
Variable torque characteristics used for pumps and fans.
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MG18B222 - VLT is a registered Danfoss trademark