Danfoss VLT AutomationDrive FC 302 Programming Manual page 59

Parameter Descriptions
1-93 Thermistor Source
Option: Function:
[6] Digital input
33
1-94 ATEX ETR cur.lim. speed reduction
FC 302 only.
Only visible if parameter 1-90 Motor Thermal Protection is set to
[20].
Range:
0 % [0 - 100 %]
*
The reaction for operating in Ex-e current limit must be
configured.
0%: The frequency converter does not change anything
besides issuing warning 163 ATEX ETR cur.lim.warning.
>0%: The frequency converter issues warning 163 and
reduces motor speed following ramp 2 (parameter group
3-5* Ramp 2).
Example:
Actual reference = 50 RPM
Parameter 1-94 ATEX ETR cur.lim. speed reduction = 20%
Resulting reference = 40 RPM
1-95 KTY Sensor Type
Option: Function:
Select the used type of KTY sensor. FC 302
only.
KTY Sensor 1 1 kΩ at 100 °C
[0]
*
KTY Sensor 2 1 kΩ at 25 °C
[1]
KTY Sensor 3 2 kΩ at 25 °C
[2]
1-96 KTY Thermistor Resource
Option: Function:
Selecting analog input terminal 54 to be used
as KTY sensor input. Terminal 54 cannot be
selected as KTY source if otherwise used as
reference (see parameter 3-15 Reference Resource
1 to parameter 3-17 Reference Resource 3).
FC 302 only.
NOTICE
Connection of KTY sensor between term.
54 and 55 (GND). See Illustration 3.15.
[0] None
*
[2] Analog
Input 54
1-97 KTY Threshold level
Range: Function:
80 �C [-40 - 140 �C] Select the KTY sensor threshold level
*
for motor thermal protection.
FC 302 only.
MG33MJ02
Programming Guide
1-98 ATEX ETR interpol. points freq.
FC 302 only.
Only visible if parameter 1-90 Motor Thermal Protection is set to
[20].
Range:
Size related
Enter the 4 frequency points [Hz] from the motor name
plate into this array. Together with parameter 1-99 ATEX
ETR interpol points current, these can be presented in
Function:
Table 3.10.
NOTICE
All frequency/current limit points from the motor name
plate or motor data sheet must be programmed.
1 0 0 %
8 0 %
4 0 %
Illustration 3.18 Example of ATEX ETR Thermal Limitation
Curve.
x-axis: f
y-axis: I
Parameter 1-98 ATEX ETR
interpol. points freq.
[0]=5 Hz
[1]=15 Hz
[2]=25 Hz
[3]=50 Hz
All operating points underneath the curve are allowed
continuously. Above the line, however, these are only
allowed for a limited time calculated as a function of the
overload. In the event of a machine current greater than
1.5 times the rated current, shut-down is immediate.
1-99 ATEX ETR interpol points current
FC 302 only.
Only visible if parameter 1-90 Motor Thermal Protection is set to
[20] or [21].
Range:
Size related
Danfoss A/S © Rev. 10/2014 All rights reserved.
[ 0 - 1000.0 Hz]
*
5 Hz 15 Hz 25 Hz
[Hz]
m
/I x 100 [%]
m m,n
Parameter 1-99 ATEX ETR
interpol points current
[0]=40%
[1]=80%
[2]=100%
[3]=100%
Function:
[0 - 100 %] Definition of thermal limitation curve.
*
For example, see parameter 1-98 ATEX
ETR interpol. points freq.
Function:
3 3
50 Hz
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