Delta Electronics VFD-F Series manual DC Braking Time

Factory Setting: 2.0

VFD-F Series

			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: Disable

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

Settings 0.1~5.0 SecUnit: 0.1 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.

The allowable power loss time must in the condition that AC drive auxiliary power is working normally. If auxiliary power is turned off in the allowable power loss time, the actual allowable power loss time will be shorter than the parameter setting.

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