Chziri ZVF200-M User Manual page 38

DC Braking Time during Start-up
P 29
Settings
0.0 to 5.0 sec
This parameter determines the duration for the DC Braking Current
applied during starting. DC Braking is applied until the Minimum
Frequency is reached.
P 30 DC Braking Time during Stopping
Settings
0.0 to 25.0 sec
This parameter determines the duration for the DC Braking voltage to
be applied during stopping. If stopping with DC Braking is desired,
then P02 must be set to Ramp to Stop (0.0).
Start-Point for DC Braking
P 31
Settings
0.00 to 60.00Hz
This parameter sets the frequency at which the DC Braking will begin
during deceleration.DC braking start frequency will start from th e
lowest frequency when the setting is less than the Minimum output
frquency(P08)
Fig.6-9 DC Braking fuctron
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Chapter 6 Parameters
Factory Setting
0.0
Factory Setting
0.0
Factory Setting
0.0
DC Braking during starting is used for loads that may
move before the AC drive starts, such as hoists and cranes.
These loads may also be moving in the wrong direction.
Under such circumstances, the DC Braking can be used to
hold the load in position before applying a forward motion.
DC Braking during stopping is used to stop faster than the
TIP
ramp-to-stop or to hold a stopped load in position. A dynamic
brake resistor may be needed in order to stop loads of high
inertia.e.g.winding machine, cutting machine.
Momentary Power Loss Operation Selection
P 32
Operation stops after momentary power loss
00
Operation continues after momentary power loss Speed
01
search starts with the Master Frequency reference value
Settings
Operation continues after momentary power loss
02
Speed search starts with the min frequency
P 33 Maximum Allowable Power Loss Time
Settings
0.3 to 5.0 sec
After a power loss, the AC drive will resume operation only if the power
loss duration is shorter than the time defined by P33. If the Maximum
Allowable Power Loss Time is exceeded, the AC drive output is then
turned off.
Base-Block Time for Speed Search
P 34
Settings
0.3 to 5.0 sec
When a momentary power loss is detected, the AC drive will stop its
output and will wait during a specified time interval called Base Block
(entered in P34) before resuming operation. Setting of this parameter
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Chapter 6 Parameters
Factory Setting
00
Factory Setting 2.0 sec
Factory Setting 0.5 sec