Delta VFD-EL-W Series, User Manual

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Chapter 4 Parameters

VFD-EL-W
4-69
Group 8: Special Parameters

You can set this parameter during operation.
08.00 DC Brake Current Level Unit: 1
Settings 0–100% Default: 0
 Sets the level of the DC Brake Current output to the motor during start-up and stopping. When setting the DC
Brake Current, the AC Motor Drive Rated Current (Pr.00.01) is equal to 100%. It is recommended to start with
a low DC Brake Current Level and then increase it until you reach the proper holding torque.
08.01 DC Brake Time during Start-up Unit: 0.1
Settings 0.0–60.0 sec. Default: 0.0
 Determines the duration of the DC Brake current after a RUN command. When the time has elapsed, the AC
motor drive starts accelerating from the Minimum Output Frequency (Pr.01.05).
08.02
DC Brake Time during Stopping Unit: 0.1
Settings 0.0–60.0 sec. Default: 0.0

Determines the duration of the DC Brake current during stopping. If you want to stop the motor with the DC
Brake, set Pr.02.02 (Stop Method) to 0 or 2 for Ramp to Stop.
08.03 Start-point for DC Brake Unit: 0.01
Settings 0.00–400.00 Hz Default: 0.00

Determines the frequency at which the DC Brake is applied during deceleration.
 Use the DC Brake during Start-up for loads that may move before the AC drive starts, such as fans and
pumps. The DC Brake can hold the load in position before starting the motor.
 Use the DC Brake during stopping to shorten the stopping time, and to hold a stopped load in position, such
as cranes and cutting machines.
08.04 Momentary Power Loss Action
Default: 0
Settings 0 Operation stops (coast to stop) after momentary power loss.
1 Operation continues after momentary power loss, speed search starts with the
last frequency.
2 Operation continues after momentary power loss, speed search starts with the
minimum frequency.
 Determines the operation mode when the AC motor drive restarts from a momentary power loss.
08.05
Maximum Allowable Power Loss Time Unit: 0.1
Settings 0.1–20.0 sec. Default: 2.0

Sets the maximum allowable power loss time. If the time exceeds the Maximum Allowable Power Loss Time,
the AC motor drive output turns off (coast to stop).