Danfoss VLT AutomationDrive FC 301 Programming Manual page 54

Parameter Descriptions
NOTICE
Digital input should be set to [0] PNP -
Active at 24 V in 5-00 Digital I/O Mode.
1-94 ATEX ETR cur.lim. speed reduction
3 3
FC 302 only.
Only visible if 1-90 Motor Thermal Protection is set to [20].
Range:
0 %
*
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 issuing warning 163 and
reduces motor speed following ramp 2 (parameter group
3-5* Ramp 2).
Example:
Actual reference = 50 RPM
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
[0]
*
[1] KTY Sensor 2 1 kΩ at 25 °C
KTY Sensor 3 2 kΩ at 25 °C
[2]
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 KTY sensor threshold level for
*
52
VLT
Function:
[0 - 100 %]
Function:
Select the used type of KTY sensor. FC 302
only.
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 3-15 Reference Resource 1 to
3-17 Reference Resource 3).
FC 302 only.
NOTICE
Connection of KTY-sensor between term.
54 and 55 (GND). See Illustration 3.15.
Function:
motor thermal protection.
FC 302 only.
®
AutomationDrive FC 301/302 Programming Guide
1-98 ATEX ETR interpol. points freq.
FC 302 only.
Only visible if 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 1-99 ATEX ETR interpol
points current, these can be presented in Table 3.11.
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 %
5 Hz
Illustration 3.18 Example of ATEX ETR thermal limitation curve.
x-axis: f [Hz]
m
y-axis: I /I
m m,n
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, only 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 1-90 Motor Thermal Protection is set to [20] or [21].
Range:
Size related
*
Use the 4 current points [A] from the motor name plate.
Calculate the values as percentage of nominal motor
current, I /I
m m,n
MG33MH02 - Rev. 2013-09-30
[ 0 - 1000.0 Hz]
15 Hz 25 Hz
x 100 [%]
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 1-98 ATEX ETR
interpol. points freq.
x 100 [%], and enter into this array.
Function:
50 Hz