5.3 Description of Function Codes 5.3.5 H codes (High performance functions)
Pre-excite --EXITE (E01 to E09, data = 32)
Turning this input signal ON starts pre-excitation. After the delay time for establishing magnetic flux has elapsed, a
run command is inputted. Inputting the run command terminates pre-excitation and starts acceleration.
Use an external sequence to control the time for establishing magnetic flux.
Under V/f control (including auto torque boost and torque vector), pre-excitation is disabled, so use DC
braking or hold the starting frequency instead.
A transient phenomenon, which may occur when the losses of the machinery (load) are small, may make
the motor rotate during pre-excitation. If the motor rotation during pre-excitation is not allowed in your
system, install a mechanical brake or other mechanism to stop the motor.
Even if the motor stops due to pre-excitation, voltage is output to inverter’s output terminals U, V, and W.
Failure to observe this could result in electric shock.
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