Yaskawa GPD503 Drive - Manual (Page 88)

2.33 V/f PATTERN - CUSTOM Continued Initial Voltage Values *
When Sn-02 = 01 When Sn-02 = 0F
B. Cn-02: Frequency – Max. (Fmax)
Cn-03: Voltage – Max. (Vmax)
. . . . . . . . . . . . . 230.0 V 200.0 V
Cn-04: Frequency – Max. Voltage point (F A )
Cn-05: Frequency – Midpoint (F B )
Cn-06: Voltage – Midpoint (V C ) . . . . . . . . . . . . . 17.2 V 15.0 V
Cn-07: Frequency – Min. (Fmin)
Cn-08: Voltage – Min. (Vmin)
. . . . . . . . . . . . . 11.5 V 10.0 V
* Double indicated values for 460V units;
2.5 times indicated values for 575V units.
These seven control constants define the custom V/f pattern, only if Sn-02 is set to 0F .
The illustration below shows how these constants relate to each other in establishing the
custom V/f pattern.
2-49
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 constant settings are checked whenever power is applied to
the GPD 503, or each time the DATA/ENTER key is pressed while in
the Program (PRGM) mode. A constant set value failure (
oPE ) will
occur if any part of the following relationships among Cn-02 thru
Cn-08 is not TRUE:
(a) Fmax * F
A
* F
B
* Fmin
(b) Vmax > V C
* Vmin
V/f Characteristics Set by Cn-02 thru Cn-08
Vmax
(03)
OUTPUT
VOLTAGE V C
(06)
Vmin
(08)
Fmin F B F A Fmax
(07) (05) (04) (02)
OUTPUT FREQUENCY
[ Parenthesized values indicate control constant numbers. ]