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Note: 1.If an excessively large value is set in low-speed area (3 Hz or less), motor overheat or inverter
malfunction may occur. Change the constant gradually monitoring load or motor current.
2.The v/f constants setting have to be satisfied as following conditions:
Max. output frequency (Pn-02)
≧
Max. voltage frequency (Pn-04)
>
Intermediate output
frequency (Pn-05)
≧
Min. output frequency (Pn-07)
3.For the following setting, intemediate output frequency voltage (Pn-06) is disregarded:
Intermediate output frequency (Pn-05) = Min. output frequency (Pn-07)
˙
Output limiter selection
When v/f is set to excessively large value, an inverter fault may occur. Therefore, in order to prevent the
malfunction, the upper limit is provided for the output voltage. However, the setting is not necessary
under normal operation.
1 = 0 X X X
4
th
digit
0: Desired v/f with output voltage limiter
1: Desired v/f without output voltage limiter
output voltage limit pattern (Note)
Note: For 440 v class, the value is twice that of 220 v class.
If “1” is set, v/f matching the motor characteristics must be selected.
F
min.
(Pn-07)
F
B
(Pn-05)
F
A
(Pn-04)
F
max.
(Pn-02)
F
V
min.
(Pn-08)
F
min.
(Pn-07) (Pn-05)
(Pn-04)
F
max.
(Pn-02)
F
.
(Pn-06)
F
250v
40v
5v
0 Pn-04 /40 Pn-04