Toshiba VF-A7 Setting the acceleration and deceleration times,  ＝, ･ Function

5. Explanation of the basic parameters

Basic parameters refer to parameters you need to set before the first use after purchase.

5.1 Setting the acceleration and deceleration times

 ：Automatic acceleration/deceleration

 ：Acceleration time #1

 ：Deceleration time #1

･Function

1)The acceleration time parameter  is to set the time in which the inverter's output frequency goes up from 0 Hz to the maximum frequency .

2)The deceleration time parameter  is to set the time in which the inverter's output frequency goes down from the maximum frequency  to 0 Hz.

5.1.1 Automatic acceleration/deceleration

In this mode, the acceleration and deceleration times are changed automatically

according to the load applied.

 ＝

＊The acceleration and deceleration times are adjusted automatically within a range of 1/8 to 8 times longer than the times set with the  and the , respectively.

Output	frequency	Under a small load		Output frequency	Under a large load
	[Hz]			[Hz]
				
	０			０		Time [s]
				Time [s]
	Acceleration time		Deceleration time	Acceleration time		Deceleration time

Acceleration and deceleration times	Acceleration and deceleration times
→ Relatively short	→ Relatively long

Set the parameter (automatic acceleration/deceleration) at (enabled).

[Parameter setting]

Title	Function	Adjustment range	Default setting
	Automatic acceleration/	: Manual acceleration/deceleration	
	deceleration	: Enabled (automatic setting)

☆When the automatic acceleration/deceleration is selected (enabled), the acceleration/deceleration times constantly change according to the load condition. So, use the manual setting(,) for machines

that need to be accelerated and decelerated always at constant rates.

☆Set manually the acceleration and deceleration times (＝) in the case that braking resistor or braking unit is applied (＝).

☆Before setting this parameter, connect the inverter to the motor.

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