YASKAWA Sigma-7 SGD7S Series - 7.12.2 Preparations

Parameter Meaning When Enabled Classification
Pn310
n.0
(default
setting)
Do not detect vibration.
Immediately Setup
n.1
Output a warning (A.911)
if vibration is detected.
n.2
Output an alarm (A.520)
if vibration is detected.
If the vibration exceeds the detection level calculated with the following formula, an alarm
or warning occurs according to Pn310 (Vibration Detection Selection).
n Rotary Servomotors
100
Detection level =
Vibration detection level (Pn312 [min-1]) ´ Vibration detection sensitivity (Pn311 [%])
Fig. 187: Calculation of Detection Level - Rotary Servomotors
n Linear Servomotors
100
Detection level =
Vibration detection level (Pn384 [mm/s]) ´ Vibration detection sensitivity (Pn311 [%])
Fig. 188: Calculation of Detection Level - Linear Servomotors
Use this function only if A.520 or A.911 alarms are not output at the correct times when
vibration 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 for-
mula to adjust Pn311 (Vibration Detection Sensitivity).
Vibration Detection Sensitivity
Setting
Range
Setting Unit Default Set-
ting
When Ena-
bled
Classifica-
tion
Pn311 50 to 500 1% 100 Immediately Tuning
(applies to Speed Control, Position Control and Torque Control)
– Vibration may not be detected because of unsuitable servo gains.
Also, not all kinds of vibrations can be detected.
– Set a suitable moment of inertia ratio (Pn103). An unsuitable setting
may result in falsely detecting or not detecting vibration alarms or
vibration warnings.
– To use this function, you must input the actual references that will be
used to operate your system.
– Execute this function under the operating conditions for which you
want to set the vibration detection level.
– Execute this function while the Servomotor is operating at 10% of its
maximum speed or faster.
7.12.2 Preparations
Check the following settings before you initialize the vibration detection level.
n The parameters must not be write prohibited.
n The test without a motor function must be disabled (Pn00C = n.0).
Sigma-7 Series SERVOPACKs
Application Functions
Initializing the Vibration Detection Level > Preparations
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