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VLT Automation VT Drive FC322
Programming Guide
1-91 Motor External Fan
Option:
[0] *
No
[1]
Yes
1-93 Thermistor Source
Option:
[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
NB!
This parameter cannot be adjusted while the motor is running.
NB!
Digital inputs should be set to "No operation" - see par. 5-1*.
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Function:
No external fan is required, i.e. the motor is derated at low speed.
Applies an external motor fan (external ventilation), so no derating of the motor is required at low
speed. The graph below is followed if the motor current is lower than nominal motor current (see
Motor Current
par. 1-24
). If the motor current exceeds nominal current, the operation time still
decreases as if no fan were installed.
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
Reference 1 Source
par. 3-15
, par. 3-16
None
When using MCB112, choice [0]
MG.20.W1.22 - VLT is a registered Danfoss trademark
2 Parameter Description
Reference 2 Source
Reference 3 Source
or par. 3-17
must always be selected.
2
).
51
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