5.7 Parameters: 14-** Special Functions
5.7.1 14-0* AFE Switching
14-01 Switching Frequency
Select the AFE switching frequency. Changing the switching
frequency can help to reduce acoustic noise from the AFE. Default
depend on power size.
Option: Function:
[0] 1.0 kHz
[1] * 1.5 kHz Default switching frequency for
355-1200 kW, 690V
[2] 2.0 kHz Default switching frequency for
250-800 kW, 400V and 37-315
kW, 690V
[3] 2.5 kHz
[4] 3.0 kHz Default switching frequency for
18.5-37 kW, 200V and 37-200
kW, 400V
[5] 3.5 kHz
[6] 4.0 kHz Default switching frequency for
5.5 – 15 kW, 200V and 11-30
kW, 400V
[7] 5.0 kHz Default switching frequency for
0.25 – 3,7 k W, 200V and
0.37-7.5 kW, 400V
[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
5.7.2 14-2* Trip Reset
Parameters for configuring auto reset handling, special trip
handling and control card self test or initialisation.
14-20 Reset Mode
Select the reset function after tripping. Once reset, the frequency
converter can be restarted.
Option: Function:
[0] * Manual reset
Select Manual reset [0], to perform a
reset via [RESET] or via the digital
inputs.
[1] Automatic reset x 1
Select Automatic reset x 1…x20 [1]-
[12] to perform between one and
twenty automatic resets after
tripping.
[2] Automatic reset x 2
[3] Automatic reset x 3
[4] Automatic reset x 4
14-20 Reset Mode
Select the reset function after tripping. Once reset, the frequency
converter can be restarted.
Option: Function:
[5] Automatic reset x 5
[6] Automatic reset x 6
[7] Automatic reset x 7
[8] Automatic reset x 8
[9] Automatic reset x 9
[10] Automatic reset x 10
[11] Automatic reset x 15
[12] Automatic reset x 20
[13] Infinite Automatic Reset
Select Infinite Automatic Reset [13]
for continuous resetting after
tripping.
NOTE
The AFE may start without warning. If the specified number
of AUTOMATIC RESETs is reached within 10min, the
frequency converter enters Manual reset [0] mode. After the
Manual reset is performed, the setting of 14-20 Reset Mode
reverts to the original selection. If the number of automatic
resets is not reached within 10min, or when a Manual reset is
performed, the internal AUTOMATIC RESET counter returns
to zero.
NOTE
Automatic reset will also be active for resetting safe stop
function.
14-21 Automatic Restart Time
Range: Function:
10s* [0 - 600 s] Enter the time interval from trip to start of the
automatic reset function. This parameter is
active when 14-20 Reset Mode is set to
Automatic reset [1] - [13].
NOTE
Remember to set switches S201 (A53) and S202 (A54) as
specified below when performing a control card test in par.
14-22 [1]. Otherwise, the test will fail!
14-22 Operation Mode
Option: Function:
Use this parameter to specify normal operation;
to perform tests; or to initialise all parameters
except 15-03 Power Up's, 15-04 Over Temp's and
15-05 Over Volt's. This function is active only
when the power is cycled to the frequency
converter.
Select Normal operation [0] for normal
operation of the frequency converter with the
motor in the selected application.
Select Control card test [1] to test the analog
and digital inputs and outputs and the +10 V
How to Programme
VLT
®
Active Front End AFE 302 Operating Instructions Liebherr
MG.33.X2.02 - VLT
®
is a registered Danfoss trademark 45
5 5
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