Vacon 20, Complete User'S Manual

Page: 139 / 160

parameter descriptions vacon
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9
9.13 Automatic reset (Control panel: Menu PAR -> P14)
14.1 A
UTOMATIC RESET
Activate the Automatic reset after fault with this parameter.
NOTE: Automatic reset is allowed for certain faults only.
Fault: 1 . Under voltage
2 . Over voltage
3 . Over current
4 . Motor over temperature
5 . Under load
14.3 T
RIAL TIME
The Automatic restart function restarts the frequency converter when the
faults have disappeared and the waiting time has elapsed.
The time count starts from the first auto reset. If the number of faults occur-
ring during the trial time exceeds trail number (the value of P14.4), the fault
state becomes active. Otherwise the fault is cleared after the trial time has
elapsed and the next fault starts the trial time count again. See Figure 9.22.
If a single fault remains during the trial time, a fault state is true.
Fault trigger
Motor stop signal
Motor start signal
Supervis ion
Restart 1 Restart 2
Trial time
par.14.3
Fault active
RESET/
Fault reset
Autoreset function: (Trials = 2)
Wait time
pa r.14.2
Wait t ime
pa r.14.2
Wait t ime
par.1 4.2
Figure 9.22: Example of Automatic restarts with two restarts