Toshiba VF-A7 Regenerative power ride-through control / Deceleration stop, Case =

Step 3: Set the property of Auto-restart

1)Case =

[Parameter setting]

Title	Function	Adjustment range	Default setting
	Auto-restart adjustment #1	～	Model dependent
	Auto-restart adjustment #2	～	Model dependent

Example of setting) In the case adjustment value is , set at ～ and check the property. Notice that in this case, waiting time for the restart grows to 110～120[%]. If it cannot be adjusted at setting , , reset the range of  (motor constant #2)at 20~30% lower.

2)Case =～

[Parameter setting]

Title	Function	Adjustment range	Default setting
		: Fast(0.5[s])(with a small inertia application)
	Auto-restart	: Normal(1.0[s])	Model
	adjustment #3	～: 1.5～4.5[s]	dependent
		: Slow(5.0[s])

This parameter adjusts the rising time of motor torque at time of restarting. Adjust this parameter to inertia moment of the load.

6.13.2 Regenerative power ride-through control / Deceleration stop

 ：Regenerative power ride-through control / Deceleration stop

 ：Ride-through time / Deceleration time

・Function

1) Regenerative power ride-through control

When instant electric power failure occurs during operation, this function makes operation continue using the regeneration energy from a motor.

2)Deceleration stop

When instant electric power failure occurs during operation, this function stops the motor quickly compulsorily. A forcible stop is carried out in (Deceleration time) using the regeneration energy from the motor. (Deceleration time changes with control.) After a compulsive stop, it maintains a stop state until operation instruction is once turned off.

[When power is shut off]

	Input voltage						★The time for which the motor keeps running
							varies with the inertial of the machine operated
	Motor speed			free run time			and the loading conditions. So, conduct a test
							to determine the time before using this function.
							★Using this function in conjunction with the retry
							function enables the inverter to restart without
					About 100[ms]		making a fault stop.
							★The power ride-through control ( = ) is
					[＝]		exercised for about 100 [ms]. (A inverter which
	[When power fails momentarily]
							Applicable Motor capacity is 22kW or less is
	Input voltage						able to continue to control the motor a few
							seconds.)
	Motor speed				Less than 100[ms] [＝]
[Parameter setting]
	Title		Function				Adjustment range	Default setting
						: OFF
		Regenerative power ride-through				: ON (Regenerative		
		control / Deceleration stop					power ride-through control)
						: ON (Deceleration stop)
		Ride-through time / Deceleration time				～ [s]		

Note) Even if these functions are used, a motor may free run according to load conditions. In this case, please use the auto restart function together.

Note) These functions do not operate at the time of torque control or position control. Note) Usual slowdown time comes at the time of notes =  and =.

F-23