3.2 Operating Procedures for Utility Functions
3.2.20 Initialize Vibration Detection Level (Fn01B)
3-49
3.2.20
Initialize Vibration Detection Level
(Fn01B)
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
Warning) more precisely.
This utility function detects specific vibration components in the Servo-
motor speed. If the detected vibration exceeds the detection level calcu-
lated with the following formula, an alarm or warning occurs according
to Pn310 (Vibration Detection Selections).
• Rotary Servomotors
• Linear Servomotors
Use this utility function if A.520 or A.911 alarms are not output at a suitable
time when vibration is detected with the default vibration detection level
(Pn312 or Pn384). Otherwise, it is not necessary to execute this utility
function.
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 following formula to adjust Pn311 (Vibration
Detection Sensitivity).
Preparations
Always check the following before you initialize the vibration detection
level.
• The parameters must not be write-prohibited (Fn010 must be set to
0000).
• The test without a motor function must be disabled (Pn00C =
n.0).
Detection level
Vibration detection level (Pn312 [min
-1
]) × Vibration detection sensitivity (Pn311 [%])
100
=
Detection level
Vibration detection level (Pn384 [mm/s]) × Vibration detection sensitivity (Pn311 [%])
100
=
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