Basic Programming 5 - 5
Stopping Method Selection
b1-03 Stopping Method
There are four methods of stopping the Drive when the RUN command is removed.
0: Ramp to stop: When the run command is removed, the Drive will decelerate the motor to 0 rpm. The rate of deceleration
is determined by the active deceleration time. The factory default Decel Time is parameter C1-02.
When the output frequency has dropped below the DC Injection Start Frequency (b2-01), DC current will be injected in the
motor at a level determined by b2-02 and the injection will last as long as specified by b2-04.
Fig 5.4 Ramp to Stop
The actual deceleration time can be determined by the following formula:
Time to Stop = x Setting of active Decel Time (C1-02)
If S-curve characteristics (C2-02) are specified by the Drive programming, they will add to the total time to stop.
1: Coast to stop: When the run command is removed, the Drive will turn off its output transistors. The friction of the driven
equipment will eventually overcome any residual inertia of the system and the motor will stop.
Fig 5.5 Coast to Stop
Note: After a stop is initiated, subsequent run commands input before the Minimum Baseblock Time (L2-03) has expired
will be ignored.
2: DcInj to Stop: When the run command is removed, the Drive will Baseblock (turn off all output transistors) for the Mini-
mum Baseblock Time (L2-03). Once the Minimum Baseblock Time has expired, the Drive will inject DC current into the
motor windings to attempt to lock the motor shaft. The stopping time will be reduced as compared to Coast to Stop.
ON OFF
Run Command
Output Frequency
Deceleration to stop at
deceleration time (C1-02)
DC Injection Brake
DC Injection Brake Time
when Stopping (b2-04)
ON OFF
Run Command
Output Frequency
Drive Output Frequency Interrupted
Output Freq. at time of stop command
Maximum Frequency (E1-04)
To Next Page
Loading...
Need help?
General
