Rockwell-automation 6000 PowerFlex Medium Voltage Variable Frequency D Manual de usuario descargar pdf (Pagina 91)

Rockwell Automation Publication 6000-IN007A-EN-P - October 2014 91

Special Function Parameter Settings Appendix C

Frequency Amplitude Limit

Relevant parameter: P413, P415

Description: this function limits the amplitude of the Set Frequency. The Set

Frequency must not exceed the maximum output frequency of the drive.

Instruction: this function can limit the Set Frequency between P413 and P415,

P415>P413>0.

Frequency Skip

Relevant parameter: P89, P90, P91, P92, P93

Description: this function is designed to avoid a trip at certain output

frequencies.

Instruction: this function is enabled by P89. There are two bands, one is between

P90 and P91, the other is between P92 and P93. The Set Frequency can skip out

from these two bands if it is within them. The Set Frequency will be changed

automatically into the upper limit of the bands while the speed increases, or

changed into the lower limit of the band while the speed decreases (Figure 22

The recommended width of these intervals is 1 Hz.

Figure 22 - Principle diagram of Frequency Skip Function

fB2

fB1

fA2

fA1

User Set Frequency

Drive Recognize Frequency

P90

P91

P92

P93

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 97 98

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Rockwell-automation 6000 PowerFlex Medium Voltage Variable Frequency D Manual de usuario Pagina 91