Danfoss VLT AutomationDrive FC 301 Programming Manual page 58

Parameter Descriptions
1-93 Thermistor Source
Option:
[3] Digital input
18
[4] Digital input
3 3
19
[5] Digital input
32
[6] Digital input
33
1-94 ATEX ETR cur.lim. speed reduction
Range:
0 % [0 - 100 %]
*
Configure the reaction for operating in Ex-e current limit.
0%: The frequency converter does not change anything
besides issuing warning 163, ATEX ETR cur.lim.warning.
>0%: The frequency converter issues warning 163, ATEX ETR
cur.lim.warning 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:
KTY Sensor 1 1 kΩ at 100 °C (212 °F).
[0]
*
KTY Sensor 2 1 kΩ at 25 °C (77 °F).
[1]
KTY Sensor 3 2 kΩ at 25 °C (77 °F).
[2]
1-96 KTY Thermistor Resource
Option:
56
VLT
Function:
Function:
NOTICE
Valid for FC 302 only.
Only visible if parameter 1-90 Motor Thermal
Protection is set to [20] ATEX ETR.
Function:
NOTICE
Valid for FC 302 only.
Select the used type of thermistor sensor.
Function:
NOTICE
Valid for FC 302 only.
Selecting analog input terminal 54 to be used
as thermistor sensor input. Terminal 54 cannot
be selected as thermistor source if otherwise
used as reference (see parameter 3-15 Reference
Resource 1 to parameter 3-17 Reference Resource
3).
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®
AutomationDrive FC 301/302
1-96 KTY Thermistor Resource
Option:
[0] None
*
[2] Analog
input 54
1-97 KTY Threshold level
Range:
80 °C [-40 - 140 °C] Select the thermistor sensor threshold
*
1-98 ATEX ETR interpol. points freq.
Range:
Size related
*
Enter the 4 frequency points [Hz] from the motor
nameplate into this array. Table 3.10 shows the example of
frequency/current points.
NOTICE
All frequency/current limit points from the motor
nameplate or motor datasheet must be programmed.
1 0 0 %
8 0 %
4 0 %
5 Hz
Illustration 3.18 Example of ATEX ETR Thermal Limitation
Curve
x-axis: f [Hz]
m
y-axis: I /I
m m,n
Function:
NOTICE
Connection of thermistor sensor between
terminals 54 and 55 (GND). See
Illustration 3.15.
Function:
level for motor thermal protection.
Function:
NOTICE
[ 0 - 1000.0
Hz]
Valid for FC 302 only.
Only visible if parameter 1-90 Motor
Thermal Protection is set to [20].
15 Hz 25 Hz
x 100 [%]
50 Hz
MG33MO02