YASKAWA V7 User Manual

5-41
Continued
n011 : Frequency – Max. (Fmax)
n012 : Voltage – Max. (Vmax)
n013 : Frequency – Max. Voltage point (F
A)
n014 : Frequency – Midpoint (F
B
)
n015 : Voltage – Midpoint (V
C)
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.
NOTE: To establish a V/f pattern with a straight line from Fmin to F
A, set
F
B = Fmin. The setting of VC 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
n011 thru n017 is not TRUE:
(a) Fmax ≥ F
A ≥ FB ≥ Fmin
(b) Vmax ≥ V
C ≥ Vmin
5.27 V/f PATTERN
V/f Characteristics Set by n011 thru n017
Vmax
(n012 )
OUTPUT
VOLTAGE V
C
(n015 )
Vmin
(n017 )
Fmin F
B FA Fmax
(n016 )(n014 )(n013 )(n011 )
OUTPUT FREQUENCY

YASKAWA V7 Specifications

General

Model	V7
Category	Controller
Manufacturer	Yaskawa
Output Frequency	0.1 to 400 Hz
Type	AC Drive
Horsepower	0.5 to 300 HP
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheating, Short Circuit
Communication Interfaces	DeviceNet, Profibus, Ethernet
Operating Temperature	-10°C to 50°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Voltage Class	200V, 400V
Storage Temperature	-20°C to 65°C