D3: jump frequency, 4 d: reference settings – Yaskawa Z1000U HVAC Matrix Bypass User Manual

Page 158

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d3: Jump Frequency

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d3-01 to d3-04: Jump Frequencies 1, 2, 3 and Jump Frequency Width

The Jump frequencies are frequency ranges at which the drive will not operate. The drive can be programmed with three

separate Jump frequencies to avoid operating at speeds that cause resonance in driven machinery. If the speed reference falls

within a Jump frequency dead band, the drive will clamp the frequency reference just below the dead band and only accelerate

past it when the frequency reference rises above the upper end of the dead band.
Setting parameters d3-01 through d3-03 to 0.0 Hz disables the Jump frequency function.

No.

Parameter Name

Setting Range

Default

d3-01

Jump Frequency 1

0.0 to 400.0 Hz

0.0 Hz

d3-02

Jump Frequency 2

0.0 to 400.0 Hz

0.0 Hz

d3-03

Jump Frequency 3

0.0 to 400.0 Hz

0.0 Hz

d3-04

Jump Frequency Width

0.0 to 20.0 Hz

1.0 Hz

Figure 5.17

shows the relationship between the Jump frequency and the output frequency.

Frequency

Reference

Output
Frequency

Jump

Frequency

Width (d3-04)

Jump

Frequency 3

d3-03

Jump

Frequency 2

d3-02

Jump

Frequency 1

d3-01

Frequency

reference

decreases

Frequency

reference
increases

Jump

Frequency

Width (d3-04)

Jump

Frequency

Width (d3-04)

Figure 5.17 Jump Frequency Operation

Note:

1. The drive will use the active accel/decel time to pass through the specified dead band range, but will not allow continuous operation in

that range.

2. When setting more than one Jump frequency, make sure that d3-01≥ d3-02 ≥ d3-03.

5.4 d: Reference Settings

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YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual

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