Yaskawa VS-616G5 Series Revision F Programming Manual - Manual (Page 112)

112 VS-616G5 Programming Manual
Section L: Protection Parameters
L5 Automatic Restart
Selects operation when the frequency reference from the control circuit terminal is reduced by 90%
within 400ms.
L5 Automatic Restart
After a fault occurs, the inverter and its fault detection circuit can be reset. The automatic restart func-
tion allows the inverter to continue operation after certain faults.
Setting Range: 0 to 10
Factory Default: 0
Sets the number of automatic restart attempts. Setting to “0” disables this function.
Automatic Restart Operation
· When a fault is detected, the inverter output shuts OFF for the minimum baseblock time (L2-03).
The digital operator displays the fault while the inverter output is shut OFF.
· While the minimum baseblock time elapses, the fault is reset automatically and speed search starts
from the previous output frequency before the fault occurred.
· When the total number of faults exceeds the number of automatic restart attempts, the faults are not
reset automatically and the inverter output remains OFF. At this time, a fault contact output is acti-
vated.
The inverter can be set to automatically restart after the following faults occur:
· Overcurrent (OC)
· Overvoltage (OV)
· Undervoltage PUV (UV1)
· Ground fault (GF)
· Regenerative transistor fault (rr)
However, automatic restart is not available for the following faults:
· Control circuit undervoltage (UV2) · Excessive speed deviation (DEV)
· MC answer-back fault (UV3) · PG disconnection (PGO)
· Load short-circuit (SC) · Parameter setting error (OPR)
· Heatsink overheat (OH) · Communication error (CE)
· Run command fault (EF) · External fault (EF3 to EF8)
· Overspeed (OS)
The number of restart attempts is reset to 0 when:
· A fault does not occur for more than 10 minutes after restart.
· A fault reset command is input from the control circuit terminal or the digital operator.
· Power is cycled.
L4-05 Operation When Frequency Reference Loss Ref Loss Sel A A A A
Setting Description
0 Stop (factory default).
1 Run at 80% of the previous frequency reference.
L5-01 Number of Automatic Restart Attempts Num of Restarts B B B B