C
Co
on
ns
stta
an
ntts
s
These constants define the V/f pattern, and are related to
n
n 2
2 4
4
each other as shown in the following table and illustration.
tth
h rru
u
n
n 3
3 0
0
To establish a V/f pattern with a straight line from Fmin to Fa, set Fb = Fmin and Vc
= Vmin.
IIM
MP
PO
OR
RT
TA
AN
NT
T
When entering a setting for one of these constants, an “ E
E rr rr ” fault
will occur if any part of the following relationship is NOT TRUE:
Fmax ≥
Fa ≥
Fb ≥
Fmin
(n
n 2
2 4
4 ) (n
n 2
2 6
6 ) (n
n 2
2 7
7 ) (n
n 2
2 9
9 )
The Digital Operator will flash “ E
E rr rr ”, then the display will blink
the previous setting of the constant.
37
OUTPUT
VOLTAGE
Vmax
(
n25 )
Vc
(
n28 )
Vmin
(
n30 )
Fmin
Fb
Fa
Fmax
(
n29 )
(
n27 )
(
n26 )
(
n24 )
OUTPUT FREQUENCY
Setting Range
Factory
Constant
Name
(and units)
Setting
n24
Maximum Frequency (Fmax)
50.0 - 400 (Hz)
60.0
n25
Maximum Voltage (Vmax)
1 - 255/510 (V) *
230/460 *
n26
Maximum Voltage Frequency (Fa)
0.6 - 400 (Hz)
60.0
n27
Frequency Midpoint (Fb)
0.5 - 399 (Hz)
1.5
n28
Voltage Midpoint (Vc)
1 - 255/510 (V) *
12/24 *
n29
Minimum Frequency (Fmin)
0.5 - 10.0 (Hz)
1.5
n30
Minimum Voltage (Vmin)
1 - 50/100 (V) *
12/24 *
* Where two values appear, the first is for 115V and 230V drives, and the second for 460V drives.
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