Chapter 4 Parameters

Output frequency

 

 

 

 

DC braking

 

Stop point for

DC braking

 

 

time during

 

 

DC braking

 

current

 

stopping

 

Minimum

time during

 

level

 

 

 

output

stopping

 

 

 

 

 

frequency

08-03

 

Time

 

 

 

01-05

 

 

Run/Stop

 

 

 

 

 

 

 

ON

OFF

 

 

DC Braking Time

08 - 04 Momentary Power Loss Operation Selection

Factory Setting: 00

Settings

00: Disabled

 

01: Trace from top downward

 

02: Trace from bottom upward

This parameter determines the start-up mode after momentary power loss operation.

The power system connects to AC drive may occurred momentary power loss by any probably reason. This function can make AC drive output voltage continuously after power loss and AC drive won’t stop by power loss.

If this parameter is set to 01, AC drive will trace from the last frequency before power loss downward. After output frequency of AC drive and running speed of the motor is synchronization, it will accelerate to master frequency command. It is recommended to use this setting if the motor loading has the characteristics of high inertial and low resistance.

If this parameter is set to 02, AC drive will trace from the Min. frequency upward. After output frequency of AC drive and running speed of the motor is synchronization, it will accelerate to master frequency command. It is recommended to use this setting if the motor loading has the characteristics of low inertial and high resistance.

08 - 05 Maximum Allowable Power Loss Time

Unit: 0.1

Settings

0.1~5.0 Sec

Factory Setting: 2.0

 

 

 

This parameter determines the maximum allowable power loss time. If the power loss time is less than the time defined by this parameter, the AC drive will execute 08-04 momentary power loss operation.

The allowable power loss time is beginning to count time after AC drive displays Lu. Therefore, actual allowable power loss time will change with loading.

Revision July 2008, EG03, SW V1.06

4-63

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Delta Electronics VFD-G manual DC Braking Time