Delta VFD-A, User Manual

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33
Parameter # 35
Parameter Name Speed Search Current Limit
Factory Setting d0150%
Units 1%
Parameter value d0030 - d0200%
Following a power failure, the AC drive will start its speed search operation, only if
the output current is greater than the value determined by Pr.35.
When the output current is less than that of Pr.35, the AC drive output frequency is
at a
“ speed synchronization point ” . The drive will start to accelerate or decelerate
back to the operating frequency at which it was running prior to the power failure.
Speed search
operation
INPUT
POWER
Pr.33
Allowable maximum
power loss time
Pr.34
Speed search starts with
the frequency reference value
Pr.32 = d0001
Min. baseblock time
Speed synchronization
detection
OUTPUT
FREQUENCY
OUTPUT
VOLTAGE
INPUT
POWER
Pr.33
Allowable maximum
power loss time
Pr.34
Speed search starts with
minimum starting frequency
Pr.32 = d0002
Min. baseblock time
OUTPUT
FREQUENCY
OUTPUT
VOLTAGE
Speed search time increases as the current limit setting is reduced.
Pr.36 Pr.37
Reference Frequency Upper / Lower Limit
Parameter # 36
Parameter Name Reference frequency upper limit setting
Factory Setting d400.0 Hz
Units 0.1 Hz
Parameter value d000.1 - d400.0 Hz
Determines the upper limit of the reference frequency in 0.1 Hz increments.
Parameter # 37
Parameter Name Reference frequency lower limit setting
Factory Setting d000.0 Hz
Units 0.1 Hz
Parameter value d000.0 - d400.0 Hz
Determines the lower limit of the reference frequency in 0.1 Hz increments.