Yaskawa VS-616G5 Series Revision F Programming Manual User 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.

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:

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

Setting

Description

Stop (factory default).

Run at 80% of the previous frequency reference.

L5-01

Number of Automatic Restart Attempts

Num of Restarts