Vibration Detection Level Initialization (Fn01B) - YASKAWA SGDV User Manual

7.15 Vibration Detection Level Initialization (Fn01B)

This function detects vibration when servomotor is connected to a machine in operation and automatically
adjusts the vibration detection level (Pn312) to output more exactly the vibration alarm (A.520) and the vibra-
tion warning (A.911).
The vibration detection function detects vibration elements according to the motor speed.
Parameter
n.
[Factory setting]
Pn310
n.
n.
If the vibration exceeds the detection level calculated by the following formula, the alarm or warning will be
output according to the setting of vibration detection switch (Pn310).
Detection level =
• Use this function if the vibration alarm (A.520) or the vibration warning (A.911) is not output correctly
when a vibration at the factory setting of the vibration detection level (Pn312) is detected. In other cases, it
is not necessary to use this function.
• The vibration alarm or warning detection sensibility differs depending on the machine conditions. In this
case, fine-tune the setting of the vibration detection sensitivity (Pn311) using the above detection level for-
mula as a guide.
Vibration Detection Sensitivity
Pn311
Setting Range
50 to 500
(1) Preparation
The following conditions must be met to initialize the vibration detection level.
• The write prohibited setting parameter (Fn010) must be set to Write permitted (P.0000).
• The test without a motor function must be disabled (Pn00C.0 = 0).
0
Does not detect vibration.
Outputs the warning (A.911) when vibration is
1
detected.
2 Outputs the alarm (A.520) when vibration is detected.
Vibration detection level (Pn312 [min
Setting Unit
1%
• The vibration may not be detected because of improper servo gains. Also, not all
kinds of vibrations can be detected. Use the detection result as a guideline.
• Set a proper moment of inertia ratio (Pn103). Improper setting may result in the vibra-
tion alarm, warning misdetection, or non-detection.
• The references that are used to operate your system must be input to execute this
function.
• Execute this function under the operating condition for which the vibration detection
level should be set.
• Execute this function while the motor speed reaches at least 10% of its maximum.

7.15 Vibration Detection Level Initialization (Fn01B)

Meaning
-1
]) × Vibration detection sensitivity (Pn311 [%])
100
Speed Position Torque
Factory Setting When Enabled
100
When Enabled Classification
Immediately Setup
Classification
Immediately Tuning
7
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