Veichi JT550 Series Manual page 112

Chapter 7 Maintenance and Troubleshooting
Group FB: Swing Frequency, Fixed Length ,Count and Torque Control
The swing frequency function is applied to the textile and chemical fiber fields and the applications
where traversing and winding functions are required.
The swing frequency function indicates that the output frequency of the inverter swings up and down
with the set frequency as the center. The trace of running frequency at the time axis is shown in the Figure .
Fb.00 Swing frequency setting mode
This parameter is used to select the base value of the swing amplitude.
0: Relative to the central frequency (F0.07 frequency source selection)
It is variable swing amplitude system. The swing amplitude varies with the central frequency (set frequency).
1: Relative to the maximum frequency (F0.10 maximum output frequency)
It is fixed swing amplitude system. The swing amplitude is fixed.
Fb.01
Fb.02
This parameter is used to determine the swing amplitude and jump frequency amplitude.The swing
frequency is limited by the frequency upper limit and frequency lower limit.
• If relative to the central frequency (Fb.00 = 0), the actual swing amplitude AW is the calculation
result of F0.07 (Frequency source selection) multiplied by FB.01.
• If relative to the maximum frequency (Fb.00 = 1), the actual swing amplitude AW is the calculation
result of F0.10 (Maximum frequency) multiplied by FB.01.
Jump frequency = Swing amplitude AW * Fb.02 (Jump frequency amplitude).
• If relative to the central frequency (Fb.00 = 0), the jump frequency is a variable value.
• If relative to the maximum frequency (Fb.00 = 1), the jump frequency is a fixed value.
The swing frequency is limited by the frequency upper limit and frequency lower limit.
Fb.03
Triangular wave rising time coefficient
Fb.04
FB.03 specifies the time of a complete swing frequency cycle.
FB.04 specifies the time percentage of triangular wave rising time to FB.03 (Swing frequency cycle).
• Triangular wave rising time = FB.03 (Swing frequency cycle) * FB.04 (Triangular wave rising time
coefficient, unit: s)
• Triangular wave falling time = FB.03 (Swing frequency cycle) * (1 – FB.04 Triangular wave
rising time coefficient ,unit: s)
Swing frequency amplitude
Jump frequency amplitude
Swing frequency cycle
Range:0~1
Range:0.0%~100.0%
Range:0.0%~50.0%
Range:0.1s~3000.0s
Range:0.1%~100.0%
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JT550 Series Inverter Manual
Default:0
Default:0.0%
Default:0.0%
Default:10.0s
Default:50.0%