Chapter 12 Description of Parameter SettingsMS300 (High Speed Model)
12-07-2
DC Brake Start Frequency
Factory Setting: 0.0
Settings 0.0~1500.0 Hz
This parameter determines the start frequency of DC brake before the drive ramp to stop. When
this setting is less than start-up frequency (Pr. 01-09), the start frequency of DC brake will start
from the min. frequency.
ON
OFF
01-09
Start-up
frequency
DC brake time
at startup
07-04
07-04 07-03
Output frequency
Run / Stop
Time
DC Brake Out
ram
DC brake time
at stop
DC brake start
frequency
DC brake before run is used for occasions when the load is movable at stop, such as fans and
pumps. The motor is in free operating status and in uncertain running direction before the drive
startups. Execute DC brake first before starting the motor.
DC Brake at stop is used for occasions that hoping to brake the motor quickly or to control the
positioning, such as crane or cutting machine.
Voltage Increasing Gain
Factory Setting: 100
Settings 1~200 %
When using speed tracking, adjust Pr. 07-05 to slow down the increasing speed of voltage if
there are errors such as oL or oc. However, the time of speed tracking will be longer.
Restart after Momentary Power Loss
Factory Setting: 0
Settings 0: Stop operation
1: Speed tracking by the speed before the power loss
2: Speed tracking by the minimum output frequency
This parameter determines the operation mode when the drive restarts from a momentary
power loss.
The power system connected to the drive may be power off momentarily due to many reasons.
This function allows the drive to keep outputting after the drive is repowered and will not cause
the drive stops.
Setting 1: Tracking the frequency before momentary power loss, accelerating to master
frequency command after the drive output frequency and motor rotator speed is synchronous.
This setting is recommended if the characteristics of motor load are large inertia and small
resistance. Example: In the equipment with big inertia flywheel, there is NO need to wait till the
flywheel stops completely after restart to execute operation command, therefore it saves time.
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