L5 Fault Restart - YASKAWA VS-616PS5 Series Programming Manual

Section L: Protection Parameters
L5 Fault Reset
L5 Fault Restart
After a fault occurs, the inverter can be reset automatically. The automatic restart
function allows the inverter to reset itself and continue operation after certain faults
(Provided the fault condition no longer exists.
L5-01 Number of Automatic Restart Attempts
Setting Range:
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. The digital operator dis-
plays the fault while the inverter output is shut OFF.
• The fault is reset automatically and speed search starts from the motor speed as
detected by the PG feedback.
• 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 activated.
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)
Automatic restart is not available for the following faults:
• Control circuit undervoltage (UV2) • Excessive speed deviation (DEV)
• MC answer-back fault (UV3)
• Load short-circuit (SC)
• Heatsink overheat (OH)
• Run command fault (EF)
• Overspeed (OS)
The number of restart attempts is reset to 0 when:
• A fault does not occur for more than 10 minutes after the last restart has been per-
formed.
• A fault reset command is input from the control circuit terminal or the digital opera-
tor.
• Power is cycled.
86
0 to 10
0
• PG disconnection (PGO)
• Parameter setting error (OPR)
• Communication error (CE)
• External fault (EF3 to EF8)
VS-616PS5 Programming Manual
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