Chapter 4 Parameters|
4-128 Revision Jan. 2009, 06EE, SW--PW V1.12/CTL V2.12
Run/Stop
ON
OFF
01.05
08.03
Output Frequenc
Minimum Output
Freque nc y
Start-Poin t for
DC Brake
Time du ri ng
St op ping
DC Brake Time
during Stopping
DC Brake Time
08.01
08.02
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, such as cranes and cutting machines. For high inertia loads, a brake resistor for
dynamic brake may also be needed for fast decelerations. Refer to appendix B for the
information of brake resistors.
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 Last Frequency.
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.
The power connected to the AC motor drive may be off temporarily with unknown factors. This
parameter can restart the drive after momentary power loss.
Setting 1: the drive will operate by the last frequency before momentary power loss. It will
accelerate to the master frequency after the drive output frequency and the motor rotor’s
speed are synchronous. It is recommended to use this setting for those motor loads which
have a large inertia and small resistance to save time by restarting without waiting the flywheel
stops completely, such as machinery equipment with a large-inertia flywheel.
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