Toshiba VF-S9 manual Retry function

E6580757

6.12.3 Retry function

: Retry selection (Selecting the number of times the motor is to be restarted automatically)

Warning

•Do not go near the motor in alarm-stop status when the retry function is selected. The motor may suddenly restart, which could result in injury.

Mandatory • Take measures for safety, e.g. attach a cover to the motor, to prevent accidents if the motor suddenly re- starts.

• Function

This parameter resets the inverter automatically when the inverter gives an alarm. During the retry mode, the motor speed search function operates automatically as required and thus allows smooth motor restarting.

	[Parameter setting]
	Title		Function			Adjustment range		Default setting
6
		Retry selection			0: None, 1 ∼	10 times		0
	The likely causes of tripping and the corresponding retry processes are listed below.
	Cause of tripping			Retry process			Canceling conditions
	Momentary power		Up to 10 times in succession				The retry function will be canceled at
	failure		1st retry: About 1 sec after tripping				once if tripping is caused by an unusual
	Overcurrent		2nd retry: About 2 sec after tripping				event other than: momentary power fail-
	Overvoltage		3rd retry: About 3 sec after tripping				ure, overcurrent, overvoltage or overload.
	Overload			…			This function will also be canceled if re-
			10th retry: About 10 sec after tripping				trying is not successful within the speci-
							fied number of times.

★The retry function is disabled in the following unusual events:

•	: Arm overcurrent at start-up	•	: Main unit RAM fault
•	: Overcurrent on the load side at start-up	•	: Main unit ROM fault
•	: Output phase failure	•	: CPU fault trip
•	: External thermal trip	•	: Remote control error
•	: Overtorque trip	•	: EE PROM fault
•	: Small-current operation trip	•	: Auto-tuning error
•	: External trip stop
•	: Undervoltage trip (main circuit)	•	: Ground fault trip
•	: Input phase failure	•	: Inverter type error

★Protective operation detection relay signals (FLA, FLB, FLC terminal signals) are not sent during use of the retry function.

★A virtual cooling time is provided for overload tripping ( , , ). In this case, the retry func- tion operates after the virtual cooling time and retry time.

★In the event of over voltage tripping ( ∼ ), re-tripping may result unless the DC voltage de-

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