Definitions - Danfoss VLT 7000 Series Manual

Definitions

Definitions are given in alphabetical order.
Analogue inputs:
The analogue inputs can be used for controlling
various functions of the frequency converter.
There are two types of analogue inputs:
Current input, 0-20 mA
Voltage input, 0-10 V DC.
Analogue ref.
A signal transmitted to input 53, 54 or 60.
Can be voltage or current.
Analogue outputs:
There are two analogue 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:
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.
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VLT® 7000 Booster
Digital inputs:
The digital inputs can be used for controlling various
functions of the frequency converter.
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 frequency conver-ter
transmitted to the motor when the jog function is
activated (via digital terminals or serial communication).
f
M
The output frequency from the frequency converter
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:
If initializing is carried out (see parameter 620
Operating mode ), the frequency converter
returns to the factory setting.
I
VLT,MAX
The maximum output current.
I
VLT,N
The rated output current supplied by the
frequency converter.
LCP:
The control panel, which makes up a complete
interface for control and programming of VLT 7000
Booster. The control panel is detachable and may,
as an alter-native, be installed up to 3 metres away
from the frequency converter, i.e. in a front panel,
by means of the installation kit option.
LSB:
Least significant bit.
Used in serial communication.
MCM:
MG.70.A1.02 - VLT is a registered Danfoss trademark