YASKAWA Varispeed G7 Series Instruction Manual page 248

After the Stop Command is input, Run Commands are ignored until the Minimum Baseblock Time (L2-03) has
elapsed.
INFO
DC Braking Stop
If the Stop Command is input (i.e., the Run Command is turned OFF) when b1-03 is set to 2, a wait is made
for the time set in L2-03 (Minimum Baseblock (BB) Time) and then the DC injection brake current set in b2-
02 is sent to the motor to apply a DC injection brake to stop the motor. The DC injection brake time is deter-
mined by the set value in b2-04 and the output frequency when the Stop Command is input.
Run Command
ON
Output frequency
Minimum baseblock
time (L2-03)
Lengthen the Minimum Baseblock Time (L2-03) when an overcurrent (OC) occurs during stopping.
INFO
Coast to Stop with Timer
If the Stop Command is input (i.e., the Run Command is turned OFF) when b1-03 is set to 3, the Inverter out-
put is interrupted to coast the motor to a stop. After the Stop Command is input, Run Commands are ignored
until the time T has elapsed. The time T depends upon the output frequency when the Stop Command is input
and the deceleration time.
Run Command
ON
Output
frequency
Inverter output voltage interrupted
DC injection brake time
OFF
b2-04
Inverter output voltage interrupted
DC injection brake
DC injection brake time
Fig 6.16 DC Injection Braking (DB) Stop
ON ON
OFF OFF
Deceleration time
(e.g., C1-02)
Minimum baseblock
Operation wait time T
Fig 6.17 Coast to Stop with Timer
10
b2-04
10 100% (maximum output frequency)
Operation wait time T
time (L2-03)
Minimum output frequency
Stopping Methods
Output frequency at
Stop Command input
Output frequency at
Stop Command input
100% (Maximum output frequency)
15
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