Index
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MENUMENU
MENU [Unit] Access Default Min/Max Format Reg.Mode Level Ipa
Parameter Name
Description
ARTDrive V2 series - Instruction Manual Chapter 6 Parameter • 201
REG PARAM / VFAutCapt
Automatic Restart after a Temporary Alarm “Retrying”
Before the autocapture process starts, it is necessary to wait for the motor to be
demagnetized in order to avoid high current transient due to the E.M.F. (electromotive
force) which causes Overcurrent alarms.
The demagnetizing time can be set in ms via the E07.05 - Catch retry dly parameter.
In general: the bigger the motor, the longer the time.
Too low values of E07.05 - Catch retry dly cause high insertion currents. After the
demagnetizing time, the speed autocaputure phase starts.
This function is influenced by the E07.01 - Spd search time and E07.02 - Vlt
search time parameters. The process starts by supplying the motor with a frequency
equal to the one supplied by the inverter before the alarm intervention; the machine flux is
afterwards increased thus making it equal to the corresponding output frequency value
(V/f feature). If during this phase the output current is higher than the motor rated one,
the output frequency is decreased and the flux increasing speed is made slower.
REG PARAM / VFAutCapt
Catch on the Fly Process “Autocapture”
The procedure is similar to the above-mentioned one; the demagnetizing time is set via
the “Catch demag dly” parameter while the synchronism search starting speed via
“Catch init speed” in rpm.
Example: switching of a mains (AC lines) connected motor (4 poles) (AC 50Hz) on the
inverter.
- Set Catch init speed = 1500
- Inverter in a STOP condition
- Disconnect the motor from the mains and switch it on the inverter
No voltage can be applied on the inverter output (terminals U2, V2, W2). No direct
connection between input and output is allowed (Bypass).
Pay particular attention to the sequences of the switching contacts between the network
and the inverter.
- Give the START command to the inverter
Act on the E07.01 - Spd search time and E07.02 - Vlt search time parameters as
stated before.
When this function is selected and if the power or the alarm have been reset, the drive
automatically starts its normal functioning procedure. This function must be used only
with applications which do not put in danger people or things during their automatic reset.
Anyway, the enforced safety rules have to be taken into consideration.
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