Parameter Group 14: Special Functions - Danfoss FC 51 Series Programming Manual

Parameter Descriptions

4.11 Parameter Group 14: Special Functions

4.11.1 14-** Special Functions
Parameter group for configuring special frequency
converter functions.
4.11.2 14-0* Inverter Switching
14-01 Switching Frequency
Option: Function:
Select the switching frequency in order to
minimize e.g. acoustic noise and power loss or
maximizing efficiency.
[0] 2 KHz
[1] 4 KHz
*
[2] 8 KHz
[4] 16 KHz
NOTE
For 18.5 kW and 22 kW frequency converter, the option [4]
is not available.
14-03 Overmodulation
Option: Function:
This feature allows more accurate speed control near
and over nominal speed (50/60 Hz). Another
advantage with overmodulation is the ability of
staying at a constant speed even though main is
dropping.
[0] Off Disables the overmodulation function to avoid torque
ripple on the motor shaft.
[1] On Connects the overmodulation function to obtain an
*
output voltage up to 15% greater than mains voltage.
4.11.3 14-1* Mains Monitoring
This parameter group supplies functions for handling
imbalance on mains.
14-12 Functions at Mains Imbalance
Option: Function:
Operation under severe mains imbalance
conditions reduces drive lift time.
Select function to take place when severe mains
imbalance is detected.
[0] Trip Frequency converter trips.
*
[1] Warning Frequency converter issues a warning.
[2] Disabled No action taken.
Parameters for configuring auto reset handling, special trip
handling and control card self test or initialisation.
®
VLT Micro Drive FC 51 Programming Guide
14-20 Reset Mode
Option:
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10] AutoReset 10
[11] AutoReset 15
[12] AutoReset 20
[13] Infinite auto
[14] Reset at
14-21 Automatic Restart Time
Range:
10 s
14-22 Operation Mode
Option:
[0]
[2]
®
MG02C602 - VLT is a registered Danfoss trademark
Function:
Select reset function after tripping. Once
reset, the frequency converter can be
restarted.
Manual Reset Perform reset via [Reset] or digital inputs.
*
AutoReset 1 Performs one automatic reset after
tripping.
AutoReset 2 Performs two automatic resets after
tripping.
AutoReset 3 Performs three automatic resets after
tripping.
AutoReset 4 Performs four automatic resets after
tripping.
AutoReset 5 Performs five automatic resets after
tripping.
AutoReset 6 Performs six automatic resets after
tripping.
AutoReset 7 Performs seven automatic resets after
tripping.
AutoReset 8 Performs eight automatic resets after
tripping.
AutoReset 9 Performs nine automatic resets after
tripping.
Performs ten automatic resets after
tripping.
Performs fifteen automatic resets after
tripping.
Performs twenty automatic resets after
tripping.
Performs an infinite number of automatic
reset resets after tripping.
Trip-lock alarm can be reset at power up.
CAUTION
power-up
Motor may start without warning.
Function:
[0-600 s] Enter time interval from trip to start of
*
automatic reset function. This parameter is
active when 14-20 Reset Mode, is set to [1] to
[13] Automatic Reset.
Function:
Use this parameter for specifying normal
operation or to initialize all parameters,
except 15-03 Power Ups, 15-04 Over Temps
and 15-05 Over Volts.
Normal Frequency converter runs normal operation.
*
Operation
Initialization Resets all parameters to default settings,
except for 15-03 Power Ups, 15-04 Over
Temps and 15-05 Over Volts. Frequency
converter resets during next power-up.
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