((
Search commands with set values of 6 and 7 cannot be set at the
same time.
Set value = 6: Speed search starts with the maximum frequency.
Set value = 7: Speed search starts with the frequency reference
value when search command is input.
FWD(REV) RUN com-
mand
SEARCH command
Max. frequency or fre-
quency ref. value when
SEARCH command is
input
Output frequency
Min. baseblock
time
Voltage at speed search
Output voltage
Speed search
operation
Return to the voltage
at normal running
Speed synchronization
detection
0.5 sec. or less
Note 1. In momentarystopoperation continuation mode, speed search
operation is performed beginning with current output frequen-
cy, regardless of the existence of search command. After
completion of speed search, the operation is performed ac-
cording to the run command.
2. Determine a sequence sothat FWD/REV run command enters
at the same time or later than search command.
Example of Sequence
Relay 1 Relay 2
Relay 1
SEARCH command
FWD/REV RUN command
When inverter output current immediately after power recovery is
larger than the set value of No. 54, speed search operation is
started. When inverter output current is smaller than the set value
of No. 54, the frequency is interpreted as a speed synchronization
point and acceleration or deceleration is performed again up to a
specified frequency.
On detecting momentary power loss, the inverter shuts off output
and maintains the baseblock state for a given time. Set in No. 55
the time when residual voltage is expected to be almost zero.
When momentary power loss time is longer than the minimum
baseblock time, speed search operation is started immediately af-
ter power recovery.
Speed Search
Deactivation Current
Level (No. 54)
Minimum Baseblock
Time (No. 55)
Section 2-10
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