Mitsubishi Electric F700, Instruction Manual

Page: 88 / 341

79
V/F pattern
4
PA
R
A
M
E
T
E
R
S
(3) Base frequency voltage setting (Pr. 19)
˜
Use Pr. 19 Base frequency voltage to set the base voltage (e.g. rated motor voltage).
˜
If the setting is equal to or less than the power supply voltage, the maximum output voltage of the inverter is as set in
Pr. 19 .
˜
Pr. 19
can be utilized in the following cases.
(a) When regeneration frequency is high (e.g. continuous regeneration)
During regeneration, the output voltage becomes higher than the reference and may cause an overcurrent trip
(E.OC
) due to an increased motor current.
(b) When power supply voltage variation is large
When the power supply voltage exceeds the rated voltage of the motor, speed variation or motor overheat may
be caused by excessive torque or increased motor current.
CAUTION
˜
When Pr. 71 Applied motor is set to "2" (adjustable 5 points V/F characteristic), the Pr. 47 setting becomes invalid. In addition, you
cannot set "8888" or "9999" in Pr. 19 .
˜
Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may affect the other functions. Make
setting after confirming the function of each terminal.
i
Parameters referred to
i
Pr. 14 Load pattern selection Refer to page 80
Pr. 29 Acceleration/deceleration pattern selection Refer to page 93
Pr. 71 Applied motor Refer to page 99
Pr. 80 Motor capacity(Simple magnetic flux vector control) Refer to page 68.
Pr. 178 to Pr. 189 (input terminal function selection) Refer to page 110.