Chapter 12 Description of Parameter SettingsME300
12.1-01-9
These parameters set the skip frequency ranges for the AC motor drive. You can use this
function to avoid frequencies that cause mechanical resonance. The skip frequencies are useful
when a motor has resonance vibration at a specific frequency bandwidth. Skipping this frequency
avoids the vibration. There are three frequency skip zones available. You can set the Frequency
command (F) within the range of skip frequencies. Then the output frequency (H) is limited to the
lower limit of skip frequency ranges.
When accelerating and decelerating, the output frequency still passes through the skip frequency
ranges.
Zero-speed Mode
Default: 0
Settings
0: Output waiting
1: Zero-speed operation
2: Fmin (refer to Pr.01-07, 01-41)
When the frequency command of drive is less than Fmin (Pr.01-07, Pr.01-41), the drive operates
using this parameter.
0: the AC motor drive is in waiting mode without voltage output from terminals U, V, W.
1: the drive executes the DC brake by Vmin (Pr.01-08 and Pr.01-42) in V/F and SVC modes.
2: the AC motor drive runs using Fmin (Pr.01-07, Pr.01-41) and Vmin (Pr.01-08, Pr.01-42) in V/F
and SVC modes.
In V/F and SVC modes:
V/F Curve Selection
Default: 0
Settings 0: V/F curve determined by Pr.01-00–01-08
1: 1.5
th
V/F curve
2: 2
nd
V/F curve
When setting to 0, refer to Pr.01-01–01-08 for the motor 1 V/F curve. For motor 2, refer to
Pr.01-35–01-42.
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