Delta Electronics AC Drive VFD-F Series User Manual page 47

VFD-F Series
If this parameter is set to 00: The AC drive will not store the last known master frequency
command, after power is removed.
If this parameter is set to 01: The AC drive will memorize the last known master frequency
command after power off. Upon power up the last known frequency is displayed.
After a fault, the AC drive will always remember the last know master frequency command.
This feature is only enabled when Pr. 02-00 is set for 0 or 4.
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