pulse ref.
A signal transmitted to the digital inputs (terminal 17 or
29).
binary ref.
A signal transmitted to the serial communication port.
Ref
MIN
The smallest value which the reference signal may
have. Set in parameter 204.
Ref
MAX
The maximum value which the reference signal may
have. Set in parameter 205.
Miscellaneous:
ELCB:
Earth Leakage Circuit Breaker.
lsb:
Least significant bit.
Used in serial communication.
msb
Most significant bit.
Used in serial communication.
PID:
The PID regulator maintains the desired speed (pres-
sure, temperature, etc.) by adjusting the output fre-
quency to match the varying load.
Trip:
A state which occurs in different situations, e.g. if the
frequency converter is subjected to an overtempera-
ture. A trip can be cancelled by pressing reset or, in
some cases, automatically.
Trip locked:
A state which occurs in different situations, e.g. if the
frequency converter is subject to an overtemperature.
A locked trip can be cancelled by cutting off mains and
restarting the frequency converter.
Initialising:
If initialising is carried out, the frequency converter re-
turns to the factory setting.
Setup:
There are four Setups, in which it is possible to save
parameter settings. It is possible to change between
the four parameter Setups and to edit one Setup, while
another Setup is active.
LCP:
The control panel, which makes up a complete inter-
face for control and programming of VLT 5000 Series.
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.
VVC
plus
If compared with standard voltage/frequency ratio con-
trol, VVC
plus
improves the dynamics and the stability,
both when the speed reference is changed and in re-
lation to the load torque.
Slip compensation:
Normally, the motor speed will be affected by the load,
but this load dependence is unwanted. The frequency
converter compensates for the slip by giving the fre-
quency a supplement that follows the measured ef-
fective current.
Thermistor:
A temperature-dependent resistor placed where the
temperature is to be monitored (frequency converter
or motor).
Analogue inputs:
The analogue inputs can be used for controlling vari-
ous functions of the frequency converter.
There are two types of analogue inputs:
Current input, 0-20 mA
Voltage input, 0-10 V DC.
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.
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.
Brake resistor:
The brake resistor is a module capable of absorbing
the brake power that is generated in regenerative brak-
ing. This regenerative braking power increases the
intermediate circuit voltage and a brake chopper en-
sures that the power is transmitted to the brake resis-
tor.
VLT
®
5000 Design Guide
MG.52.B2.02 - VLT
®
is a registered Danfoss trademark
129
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fini
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