Speed Search - YASKAWA GPD-506V Technical Manual

5 . 1 9 M U L T I - F U N C T I O N INPUT TERMINALS ( T e r m . S 2 - S 6 )
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, n 0 5 7 , then the speed search is
made. The operation depends on the set value.
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.
SIGNAL

SPEED SEARCH

MAX FREQ., OR FREQ.
REF. WHEN SPEED
SEARCH IS INPUTTED
OUTPUT FREQUENCY
VOLTAGE AT
SPEED SEARCH
OUTPUT VOLTAGE
NOTE: When continuous operation mode at momentary stop function is selected,
n 0 5 6 : Speed Search Deactivation Current Level
(SpdSrch Current)
After power recovery, if the drive output current is larger than the set value of n 0 5 6 ,
speed search is started, using a decel rate of 2.0 sec. When drive output current is lower
than the set value of n 0 5 6 , speed search is complete and acceleration or deceleration is
continued at the normal rate (n 0 1 8 - n 0 2 1 ) to set frequency.
RUN
MIN.
BASE
BLOCK
TIME
(n057 )
the Speed Search command must be enabled.
Speed Search Operation Timing
IMPORTANT
WITHIN 0.5 SEC
SPEED SEARCH
OPERATION
5-34
Continued
SPEED COINCIDENCE
POINT
RETURN TO
NORMAL V/f
V/f
OUTPUT
(n058 )
Factory setting: 110 %
Range: 0 to 200 %