YASKAWA V1000 Series Installation & Start-Up Manual page 138

4.4 Basic Parameter Adjustments
Note: 1. After entering a stop command, the drive will not accept another run command until the
time set to L2-03 (Minimum Baseblock Time) passes.
2. Do not enter another run command until the motor comes to a complete stop. If a run
command must be entered before the motor has fully stopped, use DC Injection or Speed
Search functions to slow the motor or catch the motor before restarting.
DC Injection Braking to Stop (b1-03 = 2)
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DC Injection braking can be used to eliminate motor from coasting when the drive
reaches the minimum output frequency during a stop. This feature allows the drive
to stop the motor faster than coasting freely to a stop without allowing regenerative
energy to develop.
This stopping method applies DC current to the motor windings and thereby stops
the motor without operating in the regenerative mode. When the stop command is
input, the drive waits the time set in L2-03 (Minimum Base Block time) and then
applies the DC current level set in b2-02. The time for which DC braking is applied
is determined by the output frequency at the time of the stop command as shown in
Figure 4.19.
When b1-03 = 2, the actual DC injection time is calculated as follows:
(b2-04) x 10 x (Output frequency) / (E1-04)
Note: DC Injection braking cannot be selected as a stopping method in PM Open Loop
Vector Control.
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YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)