102 Chapter 7 - Parameters Description
User Manual
P.321 Autocapture Ilim
(Autocapture current limit)
Current limit threshold for the utocapture function.
For current operation, this limit must be higher than the no-load current of the motor in use.
% of inverter nominal current (
d.950
).
P.322 Demagnetiz time
(Autocapture demagnetizzation time)
Delay for the beginning of the Autocapture function.
It is the time necessary for the demagnetization the motor. Times too longer can cause the tripping of
"Overcurrent" alarm.
P.323 Autocap f scan t
(Autocapture frequency scanning time)
Ramp time for the frequency scanning.
The initial scanning frequency type, must be chosen via the selection of parameter
P.325.
P.324 Autocap V scan t
(Autocapture voltage scanning time)
Ramp time for the voltage recovering.
The function is correlated to the parameter
P.323.
The output voltage will be restored, controlling automatically the current limit set in
P.321
.
P.325 Autocap spd src
(Autocapture speed source)
Selection of the source for the initial scanning frequency.
Code
Name
[Code] & Function.
Default
MIN
MAX
Unit
Variation
IPA
P.320
Autocapture mode [0] Disable
0
0
2
454
[1] 1st run only
[2] Always
P.321
Autocapture Ilim
120
20
170
% of I nom
456
P.322
Demagnetiz time
1
0.01
10
sec
0.01
457
P.323
Autocap f scan t
1
0.1
25
sec
0.1
458
P.324
Autocap V scan t
0.2
0.1
25
V
0.1
459
P.325
Autocap spd src
[0] Frequency ref 0
0
3
460
[1] Max freq ref
[2] Last freq ref
[3] Encoder
A signalling of the "Autocapture" status is available on the digital output as "
Autocapture run
"
.
Undervoltage Configuration
A temporary phase loss of line input voltage, can be detected by the inverter intermediate circuit (DC-bus) as variation of
its low voltage threshold level.
This condition will cause the tripping of inverter "Undervoltage" (UV) alarm.
A correct configuration of the inverter parameters, can avoid undesired system alarms caused by main dip or instability of
the line voltage.
Therefore, considering the above points the inverter will have the following behaviour:
detection of undervoltage threshold setted with
Undervoltage thr (P.340)
parameter
disabling of output control voltage: the motor will coast to stop
enabling of
Autocapture
function, if the main dip of the line voltage is lower than the time sets with
Max pwrloss time
(P.341)
parameter; an higher value will cause a tripping of undervoltage inverter alarm (UV)
The enabling of the function depends by the configuration of the following parameters:
