Operating instructions

13-52 SL Controller Action
Array [20]
Option: Function:
[90] Set ECB Bypass
Mode
[91] Set ECB Drive
Mode
[100] Reset Alarms
3.14 Main Menu - Special Functions -
Group 14
3.14.1 14-0* Inverter Switching
14-00 Switching Pattern
Option: Function:
Select the switching pattern: 60° AVM or SFAVM.
[0]
* 60 AVM
[1] SFAVM
14-01 Switching Frequency
Option: Function:
Select the inverter switching frequency. Changing
the switching frequency can help to reduce
acoustic noise from the motor.
NOTE
The output frequency value of the
frequency converter must never exceed
1/10 of the switching frequency. When
the motor is running, adjust the switch-
ing frequency in par. 14-01 Switching
Frequency until the motor is as noiseless
as possible. See also par. 14-00 Switching
Pattern and the section Derating.
[0] 1.0 kHz
[1] 1.5 kHz
[2] 2.0 kHz
[3] 2.5 kHz
[4] 3.0 kHz
[5] 3.5 kHz
[6] 4.0 kHz
[7]
* 5.0 kHz
[8] 6.0 kHz
[9] 7.0 kHz
[10] 8.0 kHz
[11] 10.0 kHz
[12] 12.0 kHz
[13] 14.0 kHz
[14] 16.0 kHz
14-03 Overmodulation
Option: Function:
[0] Off Selects no over-modulation of the output voltage in
order to avoid torque ripple on the motor shaft.
[1]
* On The over-modulation function generates an extra
voltage of up-to 8% of U
max
output voltage without
over-modulation, which results in an extra torque of
10-12% in the middle of the over-syncronous range
(from 0% at nominal speed rising to approximately 12%
at double nominal speed).
14-04 PWM Random
Option: Function:
[0] * Off No change of the acoustic motor switching noise.
[1] On Transforms the acoustic motor switching noise from a
clear ringing tone to a less noticeable ‘white’ noise. This
is achieved by slightly and randomly altering the
synchronism of the pulse width modulated output
phases.
3.14.2 14-1* Mains On/Off
Parameters for configuring mains failure monitoring and
handling.
14-10 Mains Failure
Option: Function:
Select the function at which the frequency
converter must act, when the threshold set in
par. 14-11 Mains Voltage at Mains Fault has been
reached or a Mains Failure Inverse command is
activated via one of the digital inputs (par. 5-1*).
[0]
* No
function
The energy left in the capacitor bank will be used
to "drive" the motor, but will be discharged.
[1] Ctrl. ramp-
down
The frequency converter will perform a control-
led ramp down. Par. 2-10 Brake Function must be
set to Off [0].
[3] Coasting The inverter will turn off and the capacitor bank
will back up the control card then ensuring a
faster restart when mains reconnected (at short
power zags).
[4] Kinetic
back-up
The frequency converter will ride through by
controlling speed for generative operation of the
motor utilizing the moment of inertia of the
system as long as sufficient energy is present.
Parameter Description
VLT
®
HVAC Drive Programming Guide
102 MG.11.CA.02 - VLT
®
is a registered Danfoss trademark
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