Powtran PI7500 Series User Manual page 24

F39: Skip frequency 3
F40: Skip frequency range
During running, to skip resonance produced by the immanent resonance
point in the machine system, skip mode can do this.
At most 3 resonance points can be set to skip.
output frequency
skip frequency 1
skip frequency 2
skip frequency 3
frequency setting signal
Skip frequency range is the up and down frequency range on the base of
skip frequency.
During acc/dec, the output frequency could normally go through the skip
frequency area.
F41: Automatic voltage regulation
CPU automatically inspects the DC bus voltage and deal with it at the real
time, when electric network voltage fluctuates, output voltage fluctuation is
very small, and the V/F feature always is close to the setting state with rated
input voltage.
0: Invalid
1: Valid
2: Invalid but useless when deceleration
F42: Over voltage stall protection
DC voltage
output frequency
Section VI. Function Parameter Description
factory setting: 0.00/0.0Hz
factory setting: 0.00/0.0Hz
skip range
skip range
skip range
factory setting: 0
factory setting: 1
time
time
43
Section VI. Function Parameter Description
0: Invalid
1: Valid
When this function is valid and the frequency converter decelerates, the
motor generates voltage back to the inside of frequency converter due to
the effects of load inertia. This will lead the voltage on direct current side to
rise above the allowable max. Value, therefore, at this time the inverter will
stop deceleration (output frequency remains unchanged) and will not
decelerate until the voltage is below the set value.
This function should be set to 0 for B type frequency converter or frequency
converter with external braking unit.
F43: current limit function
0: Invalid
1: Valid
When this function is valid and the frequency converter accelerates, its
output current will rise very quickly due to too fast acceleration or too heavy
load of the motor. When the current exceeds the limited value (G/S: 140% of
the rated current; F: 120% of the rated current; Z/M/T: 170% of the rated
current; H: 230% of the rated current), the frequency converter will stop
acceleration while when the current is below the limited value, the converter
will continue acceleration.
When this function is valid and the frequency converter runs steadily, its
output current will rise very quickly due to too fast acceleration or too heavy
load of the motor. When the current exceeds the limited value (G/S: 140% of
the rated current; F: 120% of the rated current; Z/H/T: 170% of the rated
current; H: 230% of the rated current), the frequency converter will reduce
the output frequency, and when the current is below the limited value, the
converter will accelerate again to the setting value.
output
frequency
time(s)
output
current %
time(s)
factory setting: 0
output
frequency
time(s)
output
current %
time(s)
44