Omron SYSDRIVE RV Series User Manual page 227

Setting Precautions
When using flux vector control, the zero-speed control starts when motor speed drops to b2-01 during
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deceleration. Also, the setting b2-01 < E1-09 is possible.
The current level during injection brake time at start is the value of E2-03 (motor no-load current). Accord-
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ingly, b2-02 is invalid in flux vector control.
Coast to Stop
If the Stop Command is input (i.e., the Run Command is turned OFF) when b1-03 is set to 1, the Inverter out-
put voltage is interrupted. The motor coasts to a stop at the deceleration rate that counterbalances damage to
the machine and inertia including the load.
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
Run Command
ON
Output frequency
Fig 6.17 Coast to Stop
DC injection brake time
OFF
b2-04
Inverter output voltage interrupted
DC injection brake
DC injection brake time
Fig 6.18 DC Injection Braking (DB) Stop
OFF
Inverter output freqeuencty interrupted.
10
b2-04
10 100% (maximum output frequency)
Stopping Methods
Output frequency at
Stop Command input
19
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