VLT
®
4000 VT
■
Definitions
Definitions are given in alphabetical order.
Analog inputs:
The analog inputs can be used for controlling
various functions of the VLT AFD. There are
two types of analoge inputs:
Current input, 0-20 mA
Voltage input, 0-10 V DC.
Analog ref.
A signal transmitted to input 53, 54 or 60.
Can be voltage or current.
Analog outputs:
There are two analog outputs, which are able to supply
a signal of 0-20 mA, 4-20 mA or a digital signal.
Automatic motor adjustment, AMA:
Automatic motor adjustment algorithm, which
determines the electrical parameters for the
connected motor, at standstill.
AWG:
Means American Wire Gauge, i.e. the American
measuring unit for cable cross-section.
Control command:
By means of the control unit and the digital inputs,
it is possible to start and stop the connected
motor. Functions are divided into two groups,
with the following priorities:
Group 1
Reset, Coasting stop, Reset and
Coasting stop, DC braking, Stop
and the [OFF/ STOP] key.
Group 2
Start, Pulse start, Reversing, Start
reversing, Jog and Freeze output
Group 1 functions are called Start-disable commands.
The difference between group 1 and group 2 is that
in group 1 all stop signals must be cancelled for the
motor to start. The motor can then be started by
means of a single start signal in group 2.
A stop command given as a group 1 command
results in the display indication STOP. A missing
stop command given as a group 2 command results
in the display indication STAND BY.
Digital inputs:
The digital inputs can be used for controlling
various functions of the VLT AFD.
Digital outputs:
There are four digital outputs, two of which activate
a relay switch. The outputs are able to supply
a 24 V DC (max. 40 mA) signal.
f
JOG
The output frequency from the VLT AFD transmitted
to the motor when the jog function is activated (via
digital terminals or serial communication).
f
M
The output frequency from the VLT AFD
transmitted to the motor.
f
M,N
The rated motor frequency (nameplate data).
f
MAX
Maximum output frequency transmitted to the motor.
f
MIN
Minimum output frequency transmitted to the motor.
I
M
The current transmitted to the motor.
I
M,N
The rated motor current (nameplate data).
Initializing:
Ifinitializing is carried out (see parameter 620
Operating
mode
), the VLT AFD returns to the factory setting.
I
VLT,MAX
The maximum output current.
I
VLT,N
The rated output current supplied by the VLT AFD.
LCP:
The control panel, which makes up a complete
interface for control and programming of VLT 4000 VT.
The control panel is detachable and may, as an
alterna-tive, be installed up to 10 feet away from
the VLT AFD, i.e. in a front panel, by means
of the installation kit option.
LSB:
Least significant bit.
Used in serial communication.
MG.40.A7.22 - VLT is a registered Danfoss trademark
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