•
•
•
•
N O T I C E
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 Func-
tion
.
Parameter 1-89 Stop Func Torque Ramp Time
Table 135: Parameter 1-89 Stop Func Torque Ramp Time
1-89 Stop Func Torque Ramp Time
Default value: 0.01 s
Parameter type: Range, 0.01 - 3600.00 s
Setup: All setups
Conversion index: -2
Data type: Uint32
Change during operation: True
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]
.
4.2.10 1-9* Motor Temperature
Parameter 1-90 Motor Thermal Protection
Table 136: Parameter 1-90 Motor Thermal Protection
1-90 Motor Thermal Protection
Default value: Size related
Parameter type: Option
Setup: All setups
Conversion index: –
Data type: Uint8
Change during operation: True
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
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
M,N
and the rated motor frequency f
M,N
. See chapter 3.2.15 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.
Option Name
Description
[0]
No protection
Continuously overloaded motor when no warning or trip of the drive is required.
[1]
Thermistor warning Activates a warning when the connected thermistor or KTY sensor in the motor reacts in the
event of motor overtemperature.
[2]
Thermistor trip
Stops (trips) the drive 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.
[3]
ETR warning 1
Calculates the load when setup 1 is active and activates a warning on the display when the mo-
tor is overloaded. Program a warning signal via 1 of the digital outputs.
[4]
ETR trip 1
Calculates the load when set-up 1 is active and stops (trips) the drive when the motor is overloa-
ded. Program a warning signal via 1 of the digital outputs. The signal appears in the event of a
warning and if the drive trips (thermal warning).
[5]
ETR warning 2
[6]
ETR trip 2
[7]
ETR warning 3
AU373327181955en-000101 / 130R1208 | 89
Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide
