5-34
Continued
E. Spd Srch (MAX FRQ) (17 ): Speed Search From Max Frequency
Spd Srch (SET FRQ) (18 ) : Speed Search From Set Frequency
A multi-function input terminal is utilized to activate speed search. When the external speed search
command is closed, the base is blocked for the min. base block time, n057 , then the speed search is
made. The operation depends on the set value.
IMPORTANT
Spd Srch (MAX FRQ) (17 ) and "Spd Srch (SET FRQ)" ("18 ") CANNOT be selected in combination.
• When "Spd Srch (MAX FRQ)" ("17 ") is set, the speed search begins with the maximum
frequency.
• When "Spd Srch (SET FRQ)" ("18 ") is set, the speed search begins with the frequency
command that has been set after the search command was received.
n056 : Speed Search Deactivation Current Level Factory setting: 110 %
(SpdSrch Current)
Range: 0 to 200 %
After power recovery, if the drive output current is larger than the set value of n056,
speed search is started, using a decel rate of 2.0 sec. When drive output current is lower
than the set value of n056 , speed search is complete and acceleration or deceleration is
continued at the normal rate (n018 - n021 ) to set frequency.
RUN
SIGNAL
SPEED SEARCH
MAX FREQ., OR FREQ.
REF. WHEN SPEED
SEARCH IS INPUTTED
OUTPUT FREQUENCY
VOLTAGE AT
SPEED SEARCH
OUTPUT VOLTAGE
MIN.
BASE
BLOCK
TIME
(n057 )
V/f
(n058 )
SPEED SEARCH
OPERATION
WITHIN 0.5 SEC
NOTE: When continuous operation mode at momentary stop function is selected,
the Speed Search command must be enabled.
Speed Search Operation Timing
SPEED COINCIDENCE
POINT
RETURN TO
NORMAL V/f
OUTPUT
5.19 MULTI-FUNCTION INPUT TERMINALS (Term. S2-S6)
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