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6.11
Initializing the Vibration Detection Level
You can detect machine vibration during operation to automatically adjust the settings of
Pn312 or Pn384 (Vibration Detection Level) to detect A.520 alarms (Vibration Alarm) and A.911
warnings (Vibration) more precisely.
This function detects specific vibration components in the Servomotor speed.
Parameter
n.
(default setting)
Pn310
n.
n.
If the vibration exceeds the detection level calculated with the following formula, an alarm or
warning occurs according to Pn310 (Vibration Detection Selection).
• Rotary Servomotors
Detection level =
• Linear Servomotors
Detection level =
Use this function only if A.520 or A.911 alarms are not output at the correct times when vibra-
tion is detected with the default vibration detection level (Pn312 or Pn384).
There will be discrepancies in the detection sensitivity for vibration alarms and warnings
depending on the condition of your machine. If there is a discrepancy, use the above formula to
adjust Pn311 (Vibration Detection Sensitivity).
Vibration Detection Sensitivity
Pn311
1. Vibration may not be detected because of unsuitable servo gains. Also, not all kinds of
Information
2. Set a suitable moment of inertia ratio (Pn103). An unsuitable setting may result in falsely
3. To use this function, you must input the actual references that will be used to operate your
4. Execute this function under the operating conditions for which you want to set the vibra-
5. Execute this function while the Servomotor is operating at 10% of its maximum speed or
6.11.1
Preparations
Always check the following before you initialize the vibration detection level.
• The parameters must not be write prohibited.
• The test without a motor function must be disabled (Pn00C = n.0).
0
Do not detect vibration.
1
Output a warning (A.911) if vibration is detected.
2
Output an alarm (A.520) if vibration is detected.
Vibration detection level (Pn 12 [min-1]) Vibration detection en itivity (Pn 11 [%])
Vibration detection level (Pn 84 [mm/ ]) Vibration detection en itivity (Pn 11 [%])
Setting Range
Setting Unit
50 to 500
1%
vibrations can be detected.
detecting or not detecting vibration alarms or vibration warnings.
system.
tion detection level.
faster.
6.11 Initializing the Vibration Detection Level
Meaning
100
100
Default Setting
When Enabled
100
6.11.1 Preparations
When
Classification
Enabled
Immediately
Setup
Speed
Position
Torque
Classification
Immediately
Tuning
6
6-51
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