Danfoss VLT AutomationDrive FC 301 Programming Manual page 60

Parameter Descriptions
stop signal is given until the ramping down starts. Run a
test to find this delay as it is a sum of sensor, PLC,
frequency converter, and mechanical parts.
To ensure optimum accuracy, there should be at least 10
cycles during ramping down, see:
3 3 •
Parameter 3-42 Ramp 1 Ramp Down Time.
•
Parameter 3-52 Ramp 2 Ramp Down Time.
•
Parameter 3-62 Ramp 3 Ramp down Time.
•
Parameter 3-72 Ramp 4 Ramp Down Time.
The precise stop function is set up here and enabled from
DI at terminal 29 or terminal 33.
1-84 Precise Stop Counter Value
Range:
100000 [0 -
*
999999999]
1-85 Precise Stop Speed Compensation Delay
Range:
10 ms [0 -
*
100 ms]
3.3.12 1-9* Motor Temperature
1-90 Motor Thermal Protection
Option:
58
VLT
Function:
Enter the counter value to be used in
the integrated precise stop function,
parameter 1-83 Precise Stop Function.
The maximum permissible frequency at
terminal 29 or 33 is 110 kHz.
NOTICE
Not used for selections [0] Precise
ramp stop and [3] Speed comp stop
in parameter 1-83 Precise Stop
Function.
Function:
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:
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 Source).
Danfoss A/S © 02/2016 All rights reserved.
®
AutomationDrive FC 301/302
1-90 Motor Thermal Protection
Option:
[0] No
protection
[1] Thermistor
warning
[2] Thermistor
trip
[3] ETR
warning 1
[4] ETR trip 1
[5] ETR
warning 2
[6] ETR trip 2
[7] ETR
warning 3
Function:
See chapter 3.3.13.1 PTC Thermistor
Connection.
•
Via a KTY sensor in the motor
winding connected to an analog
input (parameter 1-96 KTY Thermistor
Resource). See chapter 3.3.13.2 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
M,N
chapter 3.3.13.3 ETR and
chapter 3.3.13.4 ATEX ETR.
•
Via a mechanical thermal switch
(Klixon type). See
chapter 3.3.13.5 Klixon.
For the North American market: The ETR
functions provide class 20 motor overload
protection in accordance with NEC.
Continuously overloaded motor, when no
warning or trip of the frequency converter is
required.
Activates a warning when the connected
thermistor or KTY sensor in the motor reacts
in the event of motor overtemperature.
Stops (trips) the frequency converter when
connected thermistor or KTY sensor in the
motor reacts in the event of motor overtem-
perature.
The thermistor cut-out value must be more
than 3 kΩ.
Integrate a thermistor (PTC sensor) in the
motor for winding protection.
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.
Calculates the load when set-up 1 is active
and stops (trips) the frequency converter when
the motor is overloaded. Program a warning
signal via 1 of the digital outputs. The signal
appears in the event of a warning and if the
frequency converter trips (thermal warning).
MG33ML02