GEA ARIETE, Instructions For Use And Maintenance Manual

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VLT
®
5000 Series
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
(pressure, temperature, etc.) by adjusting the output
frequency to match the varying load.
Trip:
A state which occurs in different situations, e.g. if
the frequency converter is subjected to an overtem-
perature. 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 overtemper-
ature. A locked trip can be cancelled by cutting off
mains and restarting the frequency converter.
Initialising:
If initialising is carried out, the frequency converter
returns 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 alternative, be installed up to 3 metres away from
the frequency converter, i.e. in a front panel, by
means of the installation kit option.
V VC
p l u s
If compared with standard voltage/frequency ratio
control, VVC
p l u s
improves the dynamics and the sta-
bility, both when the speed reference is changed and
in relation 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 giv-
ing the frequency a supplement that follows the
measured effective current.
Thermistor:
A temperature-dependent resistor placed where the
temperature is to be monitored (VLT 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 sig-
nal.
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
braking. This regenerative braking power increases
the intermediate circuit voltage and a brake chopper
ensures that the power is transmitted to the brake
resistor.
Pulse encoder:
MG.51.A1.02 - VLT is a registered Danfoss trade mark
185
Miscellaneous