Parameters 26-** Analog I/O Option Mcb - Danfoss VLT AQUA Drive FC 200 Programming Manual

Parameter Description
14-50 RFI Filter
Option: Function:
Select [0] Off only when the frequency converter is
supplied from an isolated mains source, i.e. IT mains.
In this mode, the internal RFI capacities (filter
capacitors) between chassis and the Mains RFI Filter
circuit are cut off to avoid damage to the intermediate
circuit and to reduce the earth capacity currents
(according to IEC 61800-3).
14-51 DC Link Compensation
Option: Function:
The rectified AC-DC voltage at the frequency
converter's DC link is associated with voltage ripples.
These ripples can increase in magnitude with
increased load. These ripples are undesirable because
they can generate current and torque ripples. A
compensation method is used to reduce these voltage
ripples at DC link. In general, DC link compensation is
recommended for most applications, but care must be
taken when operating in field weakening as it can
generate speed oscillations at the motor shaft. In field
weakening, it is recommended to turn DC link
compensation off.
[0] Off Disables DC Link Compensation.
[1] On Enables DC Link Compensation.
*
14-52 Fan Control
Option: Function:
Select the minimum speed of the main fan.
[0] Auto Select [0] Auto to run the fan only when the
*
internal temperature of the frequency
converter is in the range +35 °C to approxi-
mately +55 °C. The fan will run at low speed
at +35 °C and at full speed at approximately
+55 °C.
[1] On 50%
[2] On 75%
[3] On 100%
[4] Auto (Low
temp env.)
14-53 Fan Monitor
Option: Function:
Select which reaction the frequency converter
should take in case a fan fault is detected.
[0] Disabled
[1] Warning
*
[2] Trip
®
VLT AQUA Drive Programming Guide
14-55 Output Filter
Option:
[0]
[1]
[2]
NOTE
This parameter cannot be adjusted while motor is running.
14-59 Actual Number of Inverter Units
Range:
Size related
3.13.6 14-6* Auto Derate
This group contains parameters for derating the frequency
converter in case of high temperature.
14-60 Function at Over Temperature
If either heatsink or control card temperature exceeds a
programmed temperature limit, a warning will be activated. If
the temperature increases further, select whether the frequency
converter should trip (trip locked) or derate the output current.
Option:
[0]
[1]
®
MG20O602 - VLT is a registered Danfoss trademark
Function:
Select the type of output filter connected.
No Filter
*
Sine-Wave
Filter
Sine-Wave If a Danfoss Sine-wave filter is connected to the
*
Filter output, this option secures that the switching
Fixed frequency is fixed above the design frequency
of the filter (to be set in 14-01 Switching
Frequency) in the specific power size. This
prevents the filter from being noisy, overheated
and damaged.
NOTE
The switching frequency will still be
automatically controlled by the TAS
feature depending on the temperature but
limited to always be above the critical
level for the Danfoss filter.
Function:
[ 1 - 1. ] Sets the actual number of operating
*
inverter units.
Function:
Trip The frequency converter will trip (trip
locked) and generate an alarm. Power
must be cycled to reset the alarm, but
will not allow restart of the motor until
the heat sink temperature has dropped
below the alarm limit.
Derate If the critical temperature is exceeded the
*
output current will be reduced until the
allowable temperature has been reached.
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