4-165
Figure 4.4.52 Pre-excitation operation
07- 18
Minimum Base block Time
Range
【
0.1~5.0】Sec
In case of a momentary power failure, the inverter continues to operate after the power has been restored
when parameter 07-00 is set to 1. Once the momentary power failure is detected; the inverter will
automatically shut down the output and maintain B.B for a set time (07-18).
It is expected that after the minimum base block time has expired the residual voltage to be almost zero.
When the momentary power failure time exceeds the minimum base block time (07-18), the inverter will
automatically perform a speed search upon return of power. Refer to the following figure 4.4.53.
Figure 4.4.53 Minimum B.B time and momentary power loss time
Minimum base block time (07-18) is also used to for the DC braking function in combination with speed
search as follows:
- Set the minimum base block time required (07-18).
- Execute speed search or DC braking function.
- Increase minimum Baseblock time if over-current "OC" condition occurs.
- After speed search is completed, normal operation continues.
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