Trip-Less Intensification; Retry Function - Toshiba TOSVERT VF-PS1 Instruction Manual

6.15

Trip-less intensification

6.15.1 Retry function

• Stand clear of motors and equipment.
The motor and equipment stop when the alarm is given, selection of the retry function will restart them
suddenly after the specified time has elapsed. This could result in unexpected injury.
• Take measures for safety, e.g. attach a cover to the motor, to prevent accidents if the motor suddenly
Mandatory
restarts.
• Function
This parameter resets the inverter automatically when the inverter gives a trip. During the retry mode, the
motor speed search function operated automatically as required and thus allows smooth motor restarting.
[Parameter setting]
Title
The likely causes of tripping and the corresponding retry processes are listed below.
Cause of tripping
6
Momentary power failure
Overcurrent
Overvoltage
Overload
Trips covered by the retry function
• ,
•
• ,
The retry function is disabled in the following unusual events:
•
•
•
•
•
•
•
•
• ,
•
Protective operation detection relay signals (FLA, FLB, FLC terminal signals) are not sent during use of the retry
function. (factory default setting)
A virtual cooling time is provided for overload tripping (
⇒ See Section 13.2 for the virtual cooling time.
In this case, the retry function operates after the virtual cooling time and retry time.
In the event of overvoltage tripping (
predetermined level.
In the event of overheating-caused tripping (
below a predetermined level, since the internal temperature detection function of the inverter works.
Even when trip retention selection parameter (
: Retry selection (selecting the no. of times)
Function
Retry selection (selecting the no. of times)
Up to 10 times in succession
1st retry : About 1 sec after tripping
2nd retry : About 2 sec after tripping
3rd retry : About 3 sec after tripping
10th retry : About 10 sec. after tripping
, : Overcurrent
, , : Overcurrent in DC section or
overheating of devices
, : Overvoltage
, , : Arm overcurrent at start-up
: Input phase failure
: Output phase failure
: Loaded side overcurrent at start time
: External thermal error
: Low current operation
: Undervoltage
: Overtorque
: Ground fault
: Emergency stop
Warning
Adjustment range
: Deselect,
Retry process
The retry function will be canceled at once
if tripping is caused by an unusual event
other than momentary power failure,
overcurrent, overvoltage or overload.
This function will also be canceled if a
...
retry is not successful within the specified
number of times.
• : Inverter overload
• : Motor overload
• : Braking resistor
overload
• , ,
•
•
•
•
•
•
•
• ~
• Others (Other than trips covered by the retry function)
, ,
~ ), re-tripping may result unless the DC voltage decreases below a
), re-tripping may result unless the internal temperature decreases
) is set to , the retry function is enabled by
F-24
E6581531
Default setting
~ times
Canceling conditions
• : Overheat
: EEPROM error
: Main RAM error
: Main ROM error
: CPU trip
: Communication time-out error
: Gate array fault
: Output current detector error
: Optional unit error
).
setting.