Yaskawa J7 Drive User Manual
Page 72
5-37
Continued
n09 :
Frequency – Max. (Fmax)
n10 :
Voltage – Max. (Vmax)
n11 :
Frequency – Max. Voltage point (F
A
)
n12 :
Frequency – Midpoint (F
B
)
n13 :
Voltage – Midpoint (V
C
)
n14 :
Frequency – Min. (Fmin)
n15 :
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.
NOTE: To establish a V/f pattern with a straight line from Fmin to F
A
, set
F
B
= Fmin. The setting of V
C
is then disregarded and does not affect the
V/f pattern.
IMPORTANT
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
n09
thru
n15
is not TRUE:
(a)
Fmax
≥
F
A
≥
F
B
≥
Fmin
(b)
Vmax
≥
V
C
≥
Vmin
5.26 V/f PATTERN
V/f Characteristics Set by n09 thru n15
Vmax
(
n10
)
OUTPUT
VOLTAGE
V
C
(
n13
)
Vmin
(
n15
)
Fmin
F
B
F
A
Fmax
(
n14
)
(
n12
)
(
n11
)
(
n09
)
OUTPUT FREQUENCY