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).
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