5-15
• If you have assigned the FWD or REV function to the [FWD] or [REV]
terminal, you cannot change the setting of function code F02 while the
terminals [FWD] and [CM]* or the terminals [REV] and [CM]* are
short-circuited.
• If you have specified the external signal (F02 = 1) as the running
command and have assigned functions other than the FWD or RE
function to the [FWD] or [REV] terminal, caution should be exercised in
changing the settings. Because, if under this condition you assign the
FWD or REV function to the [FWD] or [REV] terminal while the ter-
minals [FWD] and [CM]* or the terminals [REV] and [CM]* are
short-circuited, the motor would start running.
*[CM] replaces with [PLC] for SOURCE mode.
F03 Maximum Frequency
Sets the maximum frequency to drive the motor. Setting the frequency out of the
range rated for the equipment driven by the inverter may cause damage or a
dangerous situation. Set a maximum frequency appropriate for the equipment. For
high-speed motors, it is recommended that the carrier frequency be set to 15 kHz.
The inverter can easily set high-speed operation. When changing the speed setting,
carefully check the specifications of motors or equipment beforehand.
Otherwise injuries could occur.
If you modify the data of F03 to apply a higher drive frequency, concur-
rently change the data of F15 for a peak frequency limiter suitable to the
drive frequency.
F04
F05
H50
H51
Base Frequency
Rated Voltage at Base Frequency
Non-linear V/f Pattern (Frequency)
Non-linear V/f Pattern (Voltage)
These function codes set the base frequency and the voltage at the base frequency
essentially required for running the motor properly. If combined with the related
function codes H50 and H51, these function codes may set data needed to drive the
motor along the non-linear V/f pattern.
The following description includes setting-up required for the non-linear V/f pattern.
Base frequency (F04)
Set the rated frequency printed on the nameplate located on the motor.
Rated voltage at base frequency (F05)
Set 0 or the rated voltage printed on the nameplate labeled on the motor.
- If 0 is set, the inverter supplies voltage equivalent to that of the power source of
the inverter at the base frequency. In this case, the output voltage will vary in line
with any variance in input voltage.
- If the data is set to anything other than 0, the inverter automatically keeps the
output voltage constant in line with the setting. When any of the automatic torque
boost settings, automatic energy saving or slip compensation is active, the volt-
age settings should be equal to the rating of the motor.
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