Danfoss VLT 5000 FLUX, Operating Instructions Manual, Page: 92 / 158

VLT
®
5000 FLUX
Regarding Value , Function and Description
of choice , please see table in section Digital
Input Functions .
■
Analog inputs
Analog inputs terminal no. 53(voltage) 54(voltage) 60(current)
parameter 308 311 314
Value:
No operation (NO OPERATION) [0] [0]
✭
[0]
Reference (REFERENCE) [1]
✭
[1] [1]
✭
Torque limit (TORQUE LIMIT CTRL) [3] [2] [3]
Thermistor (THERMISTOR INPUT) [4] [3]
KTY Thermistor (KTY THERMISTOR) [4]
Speed limit (SPEED LIMIT CTRL) [15]
Function:
Description of choice:
Analog Input Functions
No operation Is selected when the signal connected
to the terminal is disabled.
Reference
Is selected to enable change of reference
by means of an analog reference signal.
If other analog inputs are connected, these are
added up, taking account of their signs.
Torque limit Is used if the torque limit value set in
parameter 221 is changed by means of an analog signal.
Thermistor Is selected if a thermistor integrated
in the motor for motor protection must stop the
frequency converter in case of motor overtemperature.
The cut-out value is > 3 k .
KTY Sensor Is selected, when it is demanded to
correct the Regulation model according to changes
of the temperature and the motor windings. This
is carried through by correcting the stator (R
S)
and
rotor (R
r
) resistances as following:
• R
s
= R
s
(20°C) (1 + cu_alfa * (tempera-
ture_std_temperature))
• R
r
= R
r
(20°C) (1 + cu_alfa * (tempera-
ture_std_temperature)),
where
• cu_alfa = 0.00393 is copper temperature coefficient
• std_temperature = 20°C is standard temperature
NB!:
If the temperature of the motor is utilized
through a thermistor via the frequency converter,
the following most be noted:
PELV is not complied with in case of short circuits
between motorwinding and thermistor. In order to
comply with PELV, the thermistor must be isolated.
If a motor features a thermal switch instead, this
can also be connected to the input. Parameter
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.55.A6.02 - VLT is a registered Danfoss trademark
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