Omron JZA, Руководство пользователя

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d3: Jump Frequency
n d3-01, d3-02, d3-04 : Jump Frequencies 1, 2, and Jump Frequency Width
In order to avoid continuous operation at a speed that causes resonance in driven machinery, the drive can be programmed
with three separate Jump frequencies that will not allow continued operation within specific frequency ranges. 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 and d3-02 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
d3-04 Jump Frequency Width 0.0 to 20.0 Hz 1.0 Hz
Figure 5.11 shows the relationship between the Jump frequency and the output frequency.
Output
frequency
Frequency
reference
decreases
Frequency
reference
increases
Frequency
reference
Jump Frequency 1
d3-01
Jump Frequency 2
d3-02
Jump
Frequency
Width
d3-04
Jump
Frequency
Width
d3-04
Figure 5.11 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 using more than one Jump frequency, make sure that d3-01 ≥ d3-02.
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d4: Frequency Hold Function
n
d4-01: Frequency Reference Hold Function Selection
This parameter is effective when either of the digital input functions listed below is used.
• Accel/decel ramp hold function (H1-  = A)
• Up/Down function (H1-  = 10 and 11, sets the frequency reference by digital inputs)
Parameter d4-01 determines whether the frequency reference value is saved when the Run command is cleared or the
power supply is shut down.
No. Parameter Name Setting Range Default
d4-01 Frequency Reference Hold Function Selection 0 or 1 0
The operation depends on with what function parameter d4-01 is used.
Setting 0: Disabled
• Acceleration Hold
The hold value will be reset to 0 Hz when the Run command is canceled or the drive power is switched off. The active
frequency reference will be the value the drive uses when it restarts.
• Up/Down
5.4 d: Reference Settings
84 SIEP C710606 33A OYMC AC Drive – J1000 User Manual