Danfoss VLT AutomationDrive FC 301 Programming Manual page 74

Parameter Descriptions
1-84 Precise Stop Counter Value
Range:
3 3
1-85 Precise Stop Speed Compensation Delay
Range:
10 ms
*
1-89 Stop Func Torque Ramp Time
Range:
0.01 s
*
3600.00 s]
3.2.12 1-9* Motor Temperature
1-90 Motor Thermal Protection
Option:
72
Function:
NOTICE
Not used for selections [0]
Precise ramp stop and [3] Speed
comp stop in
parameter 1-83 Precise Stop
Function.
Function:
[0 - 100 ms] Enter the delay time for sensors,
PLCs, and so on for use in
parameter 1-83 Precise Stop Function.
In speed–compensated stop mode,
the delay time at different
frequencies has a major influence
on the stop function.
NOTICE
Not used for selections [0]
Precise ramp stop, [1] Cnt stop
with reset, and [2] Cnt stop w/o
reset in parameter 1-83 Precise
Stop Function.
Function:
[0.01 - Configure the time in seconds
during which the torque is ramped
to 0, after the motor speed is
ramped down to the minimum
speed as specified in
parameter 1-81 Min Speed for
Function at Stop [RPM].
Function:
Motor thermal protection can be
implemented using a range of
techniques:
•
Via a PTC sensor in the
motor windings connected
to 1 of the analog or
digital inputs
(parameter 1-93 Thermistor
Resource). See
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®
VLT AutomationDrive FC 301/302
1-90 Motor Thermal Protection
Option:
[0]
[1]
[2]
[3]
[4]
Function:
chapter 3.2.13 PTC
Thermistor Connection.
•
Via a KTY sensor in the
motor winding connected
to an analog input
(parameter 1-96 Thermistor
Sensor Resource). See
chapter 3.2.14 KTY Sensor
Connection.
•
Via calculation (ETR =
Electronic Thermal Relay)
of the thermal load, based
on the actual load and
time. The calculated
thermal load is compared
with the rated motor
current I
motor frequency f
chapter 3.2.15 ETR and
chapter 3.2.16 ATEX ETR.
•
Via a mechanical thermal
switch (Klixon type). See
chapter 3.2.17 Klixon.
For the North American market: The
ETR functions provide class 20
motor overload protection in
accordance with NEC.
No protection Continuously overloaded motor
when no warning or trip of the
frequency converter is required.
Thermistor Activates a warning when the
warning connected thermistor or KTY sensor
in the motor reacts in the event of
motor overtemperature.
Thermistor trip Stops (trips) the frequency
converter when connected
thermistor or KTY sensor in the
motor reacts in the event of motor
overtemperature.
The thermistor cutout value must
be more than 3 kΩ.
Integrate a thermistor (PTC sensor)
in the motor for winding
protection.
ETR warning 1 Calculates the load when set-up 1
is active and activates a warning on
the display when the motor is
overloaded. Program a warning
signal via 1 of the digital outputs.
ETR trip 1 Calculates the load when set-up 1
is active and stops (trips) the
and the rated
M,N
. See
M,N
M0013101