Toshiba Tosvert VF-S15 Instruction Manual page 181

6.19.6 Output voltage adjustment/Supply voltage correction
vlv
f307 : Supply voltage correction (output voltage limitation)
[Parameter setting]
Title
vlv
6
f307
*1: These are parameters set by setup menu. Default setting value is "jp". Refer to section 11.5.
● If f307 is set to "0" or "2", the output voltage will change in proportion to the input voltage.
● Even if the base frequency voltage (vlv parameter ) is set above the input voltage, the output voltage
will not exceed the input voltage.
● The ratio of voltage to frequency can be adjusted according to the rated motor voltage and frequency.
Setting f307 to "0" or "1" prevents the output voltage from increasing, even if the input voltage
changes when operation frequency exceeds the base frequency.
● When the V/F control mode selection parameter () is set to any number between 2 to 6, the supply
voltage is corrected regardless of the setting of f307.
: Base frequency voltage 1
 Function
Supply voltage correction: Prevent torque decline during low-speed operation.
Maintains a constant V/F ratio, even when the input voltage fluctuates.
Output voltage limitation: Limits the voltage at frequencies exceeding the base frequency (vl) to
prevent outputting the voltage exceeding base frequency voltage (vlv).
Applied when operating a special motor with low induced voltage.
Function
Base frequency voltage1
Supply voltage correction
(output voltage limitation)
Adjustment range
50-330 (200V class)
50-660 (400V class)
0: Supply voltage uncorrected,
output voltage limited
1: Supply voltage corrected,
output voltage limited
2: Supply voltage uncorrected,
output voltage unlimited
3: Supply voltage corrected,
output voltage unlimited
F-70
E6581926
Default setting
200/400 *1
3 *1