1-91 Motor External Fan
Option: Function:
[0]
*
No No external fan is required, i.e. the motor is derated at
low speed.
[1]
Yes Applies an external motor fan (external ventilation), so
no derating of the motor is required at low speed. The
upper curve in graph above (fout = 1 x fM,N) is followed
if the motor current is lower than nominal motor current
(see
1-24 Motor Current
). If the motor current exceeds
nominal current, the operation time still decreases as if
no fan were installed.
1-93 Thermistor Source
Option:
Function:
Select the input to which the thermistor
(PTC sensor) should be connected. An
analog input option [1] or [2] cannot be
selected if the analog input is already in
use as a reference source (selected in
3-15 Reference 1 Source
,
3-16 Reference 2
Source
or
3-17 Reference 3 Source
).
When using MCB 112, choice [0]
None
must
always be selected.
[0]
*
None
[1]
Analog input 53
[2]
Analog input 54
[3]
Digital input 18
[4]
Digital input 19
[5]
Digital input 32
[6]
Digital input 33
NOTE
This parameter cannot be adjusted while the motor is
running.
NOTE
Digital input should be set to [0]
PNP - Active at 24V
in
5-00 Digital I/O Mode
.
1-94 ATEX ETR cur.lim. speed reduction
FC 302 only.
Only visible if
is set to [20] or [21].
Range:
Function:
0.0 %
*
[0.0 - 100.0 %]
The reaction for operating in Ex-e current limit must be
configured.
0%: The drive does not change anything besides issuing
warning 163 ATEX ETR cur.lim.warning.
>0%: The drive issuing warning 163 and reduces motor
speed following ramp 2 (parameter group 3-5*).
Example:
Actual reference = 50 RPM
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.
[0]
*
KTY Sensor 1 1 kΩ at 100
o
C
[1]
KTY Sensor 2 1 kΩ at 25
o
C
[2]
KTY Sensor 3 2 kΩ at 25
o
C
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
to
).
FC 302 only.
NOTE
Connection of KTY-sensor between term.
54 and 55 (GND). See picture in section
KTY Sensor Connection
.
[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.
1-98 ATEX ETR interpol. points freq.
FC 302 only.
Only visible if
is set to [20] or [21].
Range:
Function:
Application
dependent
*
[Application
dependant]
Definition of thermal
limitation curve.
Enter the four frequency points [Hz] from the motor name
plate into this array. Together with
, these make up a table (f [Hz],I [%]).
Parameter Descriptions
FC 300 Programming Guide
MG.33.MB.02 - VLT
®
is a registered Danfoss trademark
47
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