Mitsubishi Electric FR-F820-04750 Instruction Manual page 680

(G) Control parameters
Setting of base frequency voltage (Pr. 19)
● For Pr. 19 "Base frequency voltage", set the base voltage (rated motor voltage, etc.).
● When it is set lower than the power supply voltage, maximum output voltage of the inverter will
be the voltage set in Pr. 19.
● Pr. 19 can be used in following cases.
– Regenerative driving (continuous regeneration, etc.) is performed often
Output voltage will get higher than the specification during the regenerative driving, which
may cause overcurrent trip (E.OC[]) by the increase in motor current.
– When the fluctuation of power supply voltage is high
When the power supply voltage exceeds the rated voltage of the motor, fluctuation of rotation
speed or overheating of motor may occur due to excessive torque or increase in motor current.
NOTES When the Advanced magnetic flux vector control, or PM motor control is selected, Pr. 3, Pr. 47, and
Pr. 19 will become disabled, and Pr. 83 and Pr. 84 will become enabled.
However, S-pattern curve with Pr. 29 "Acceleration/deceleration pattern selection" = "1" (S-pattern
acceleration/deceleration A) will make Pr. 3 or Pr. 47 enabled. (S-pattern curve at the time of the
PM motor control is the rated frequency of the motor.)
When Pr. 71 "Applied motor" = "2" (adjustable 5 points V/F), setting for Pr. 47 will become disabled.
Also, Pr. 19 cannot be set to "8888" or "9999".
Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection) may
affect the other functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 14
Pr. 29
Pr. 71
Pr. 83
Pr. 84
Pr. 178 to Pr. 189
5 - 518
Load pattern selection
Acceleration/deceleration pattern selection
Applied motor
Rated motor voltage
Rated motor frequency
(input terminal function selection)
Parameters
=> page 5-519
=> page 5-104
=> page 5-291
=> page 5-42
=> page 5-42
=> page 5-279