Revision 2016/03, 6ELE, V1.14
4-67
Group 8: Special Parameters
08.00
DC Brake Current Level Unit: 1
Settings 0 to 100% Factory Setting: 0
This parameter sets the level of DC Brake Current output to the motor during start-up and stopping. When
setting DC Brake Current, the Rated Current (Pr.00.01) is regarded as 100%. It is recommended to start with a
low DC Brake Current Level and then increase until proper holding torque has been achieved.
08.01
DC Brake Time during Start-up Unit: 0.1
Settings 0.0 to 60.0 sec Factory Setting: 0.0
This parameter determines the duration of the DC Brake current after a RUN command. When the time has
elapsed, the AC motor drive will start accelerating from the Minimum Frequency (Pr.01.05).
08.02
DC Brake Time during Stopping Unit: 0.1
Settings 0.0 to 60.0 sec Factory Setting: 0.0
This parameter determines the duration of the DC Brake current during stopping. If stopping with DC Brake is
desired, Pr.02.02 Stop Method must be set to 0 or 2 for Ramp to Stop.
08.03
Start-Point for DC Brake Unit: 0.01
Settings 0.00 to 599.0Hz Factory Setting: 0.00
This parameter determines the frequency when DC Brake will begin during deceleration.
Run/Stop
ON
OFF
01.05
08.03
Minimum Output
Frequency
Start-Point for
DC Brake
Time during
Stopping
DC Brake Time
during Stopping
DC Brake during Start-up is used for loads that may move before the AC drive starts, such as fans and pumps.
Under such circumstances, DC Brake can be used to hold the load in position before setting it in motion.
DC Brake during stopping is used to shorten the stopping time and also to hold a stopped load in position. For
high inertia loads, a brake resistor for dynamic brake may also be needed for fast decelerations.
08.04
Momentary Power Loss Operation Selection
Factory Setting: 0
Settings 0 Operation stops (coast to stop) after momentary power loss.
1 Operation continues after momentary power loss, speed search starts with the
Master Frequency reference value.
2 Operation continues after momentary power loss, speed search starts with the
minimum frequency.
This parameter 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 to 20.0 sec Factory Setting: 2.0
If the duration of a power loss is less than this parameter setting, the AC motor drive will resume operation. If it
exceeds the Maximum Allowable Power Loss Time, the AC motor drive output is then turned off (coast stop).
The selected operation after power loss in Pr.08.04 is only executed when the maximum allowable power loss
time is ≤20.0 seconds and the AC motor drive displays “Lu”.
But if the AC motor drive is powered off due to overload, even if the maximum allowable power loss time is
≤20.0 seconds, the operation mode as set in Pr.08.04 is not executed. In that case it starts up normally.
08.06
Base Block Speed Search
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