Retry Function - Toshiba TOSVERT VF-P7 Instruction Manual

6.13.3 Retry function

 ：Retry selection
･Do not get near the alarm-stopped motor and machine.
When the inverter is in retry mode, the alarm-stopped motor and machine unexpectedly
restart when the predetermined time has passed, and thus might cause you to get an injury.
Mandatory
･Stick caution labels to the inverter, the motor and the machine, to prevent accidents
due to an unexpected restart of them because of the retry function.
・Function
The inverter automatically resets itself when it has tripped. During a retry, according to
the setting of  (Auto-restart mode selection) the inverter automatically restarts
and this function makes smooth motor activation possible.
[Parameter setting]
Title

Causes of tripping and retry process
Cause of tripping
Momentary
power failure
Over-current
Over-voltage
Overload
Kinds of trips can be retried
・，， ：Over-current
・，，：Over-current of DC injection ・ ：Overload of motor
・，， ：Over-voltage
No retry is performed if the inverter trips for the following reasons:
★
・,, : Arm short circuit
・
・
・
・, : Ground-fault
・
・
・
・
・
★During a retry, the fault detection relay (FLA, B and C) is not active.
★A virtual cooling time is set for trips due to an overload (,,). Therefore, a
retry is performed after a virtual cooling time and the retry time have passed.
★In the case of a trip due to an over-voltage (∼), the inverter may trips again
unless the voltage in its D.C. section falls enough.
★In the case of a trip due to overheating (), the inverter may trip again unless the
temperature inside it falls enough; the inverter monitors the temperature in it.
★A retry is performed if  is set enabled, even if the trip holding selection parameter
 is set at .
★During a retry,  and the value selected with the status monitor selection
parameter  are displayed alternately.
Function
Retry selection
Retry process
a maximum of 10 consecutive retries
1st retry : about 1 [s] after tripping
2nd retry : about 2 [s] after tripping
3rd retry : about 3 [s] after tripping
...
10th retry : about 10 [s] after tripping
: Phase failure(input side)
: Phase failure(output side)
: Loaded side over-current at start time・ : Optional unit fault
: Emergency stop
: EEPROM error
: Main RAM error
: Main ROM error
: CPU fault
Warning
Adjustment range
0: Disabled, ∼ times
・ ：Overload of inverter ・ ：Over heat
・ ：Overload of braking resister
・ : Interruption communication error
・ : Gate array fault
・ : Output current detector error
・ : Flash memory fault
・ : Sink/source switching error
・ : Speed error (Over speed)
・ : Key error
・Others (other than the above)
F-24
Default setting

Canceling conditions
Retry is canceled if the inverter
trips again for reasons other than a
momentary power failure, over-
current, over-voltage or overload,
or if the inverter fails to restart
within the predetermined number
of retries.