YASKAWA V7 Technical Manual page 93

5.27 V/f PATTERN
n011 : Frequency – Max. (Fmax)
n012 : Voltage – Max. (Vmax)
n013 : Frequency – Max. Voltage point (F
n014 : Frequency – Midpoint (F
n015 : Voltage – Midpoint (V
n016 : Frequency – Min. (Fmin)
n017 : Voltage – Min. (Vmin)
These seven parameters define the V/f pattern. The illustration below shows how these constants
relate to each other in establishing the custom V/f pattern.
Vmax
(n012 )
OUTPUT
VOLTAGE V
C
(n015 )
Vmin
(n017 )
NOTE: To establish a V/f pattern with a straight line from Fmin to F
F = Fmin. The setting of V
B
V/f pattern.
The V/f parameter settings are checked each time the ENTER key is
pressed while programming the V/f parameters. A parameter set value
failure (Err ) will occur if any part of the following relationships among
n011 thru n017 is not TRUE:
Continued
)
A
)
B
)
C
Fmin
(n016 )
OUTPUT FREQUENCY
V/f Characteristics Set by n011 thru n017
is then disregarded and does not affect the
C
IMPORTANT
Fmax ≥ F ≥ F
(a)
A B
Vmax ≥ V ≥ Vmin
(b)
C
5-41
F F
B A
(n014 ) (n013 )
A
≥ Fmin
Fmax
(n011 )
, set