Danfoss VLT AutomationDrive FC 300 Programming Manual page 45

Parameter Descriptions
1-83 Precise Stop Function
Option:
[4] Com cnt
3 3
stop w/rst
[5] Comp cnt
stop w/o r
This parameter cannot be adjusted while the motor is
running.
1-84 Precise Stop Counter Value
Range:
100000 [0 - 999999999 ] Enter the counter value to be used in
*
1-85 Precise Stop Speed Compensation Delay
Range:
10 ms [0 - 100
*
ms]
3.3.9 1-9* Motor Temperature
1-90 Motor Thermal Protection
Option:
44
FC 300 Programming Guide
Function:
has ramped up before you activate the speed
compensated stop.
Same as [3] but after each precise stop the
number of pulses counted during ramp down to 0
rpm is reset.
Same as [3] but the number of pulses counted
during ramp down to 0 rpm is deducted from the
counter value entered in 1-84 Precise Stop Counter
Value.
You can for example use this reset function to
compensate for the extra distance done during
ramping down and to reduce the impacts of
gradual wear of mechanical parts.
Function:
the integrated precise stop function,
1-83 Precise Stop Function.
The maximum permissible frequency
at terminal 29 or 33 is 110kHz.
Not used for selection [0] and [3] in
1-83 Precise Stop Function
Function:
Enter the delay time for sensors, PLCs, etc. for
use in 1-83 Precise Stop Function. In speed
compensated stop mode, the delay time at
different frequencies has a major influence on
the stop function.
Not used for selection [0], [1] and [2] in
1-83 Precise Stop Function
Function:
Thermal motor protection can be
implemented using a range of techniques:
•
Via a PTC sensor in the motor
windings connected to one of the
analog or digital inputs
MG.33.MB.02 - VLT
1-90 Motor Thermal Protection
Option:
For the North American market: The ETR
functions provide class 20 motor overload
protection in accordance with NEC.
[0] No Continuously overloaded motor, when no
*
protection warning or trip of the frequency converter is
required.
[1] Thermistor Activates a warning when the connected
warning thermistor or KTY-sensor in the motor reacts in
the event of motor over-temperature.
[2] Thermistor Stops (trips) frequency converter when
trip connected thermistor or KTY sensor in the
motor reacts in the event of motor over-
temperature.
The thermistor cut-out value must be > 3 kΩ.
Integrate a thermistor (PTC sensor) in the
motor for winding protection.
[3] ETR warning Calculates the load when set-up 1 is active
1 and activates a warning on the display when
the motor is overloaded. Programme a
warning signal via one of the digital outputs.
[4] ETR trip 1 Calculates the load when set-up 1 is active
and stops (trips) frequency converter when
the motor is overloaded. Programme a
warning signal via one of the digital outputs.
The signal appears in the event of a warning
and if the frequency converter trips (thermal
warning).
[5] ETR warning
2
[6] ETR trip 2
[7] ETR warning
3
[8] ETR trip 3
®
is a registered Danfoss trademark
Function:
(1-93 Thermistor Source). See
3.3.1.1 PTC Thermistor Connection.
•
Via a KTY sensor in the motor
winding connected to an analog
input (1-96 KTY Thermistor Resource).
See 3.3.1.1 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 and the rated motor
M,N
frequency f . See 3.3.1.1 ETR and
M,N
3.3.1.1 ATEX ETR.
•
Via a mechanical thermal switch
(Klixon type). See 3.3.1.1 Klixon.