Initializing The Vibration Detection Level; Preparations; Applicable Tools - YASKAWA SGD7S Product Manual

6.11 Initializing the Vibration Detection Level

6.11.1 Preparations

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 Warning) more precisely.
This function detects specific vibration components in the Servomotor speed.
Pn310
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).
Pn311
Information

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).

6.11.2 Applicable Tools

The following table lists the tools that you can use to initialize the vibration detection level and
the applicable tool functions.
Digital Operator
6-26
Parameter

n. 0
Do not detect vibration.
(default setting)

n. 1 Output a warning (A.911) if vibration is detected.

n. 2 Output an alarm (A.520) if vibration is detected.
Vibration detection level (Pn312 [min-1])  Vibration detection sensitivity (Pn311 [%])
Vibration detection level (Pn384 [mm/s])  Vibration detection sensitivity (Pn311 [%])
Vibration Detection Sensitivity
Setting Range
50 to 500
1. Vibration may not be detected because of unsuitable servo gains. Also, not all kinds of
vibrations can be detected.
2. Set a suitable moment of inertia ratio (Pn103). An unsuitable setting may result in falsely
detecting or not detecting vibration alarms or vibration warnings.
3. To use this function, you must input the actual references that will be used to operate your
system.
4. Execute this function under the operating conditions for which you want to set the vibra-
tion detection level.
5. Execute this function while the motor is operating at 10% of its maximum speed or faster.
Tool Function
Fn01B
Meaning
100
100
Setting Unit Default Setting
1% 100
Σ-7-Series Digital Operator Operating Manual (Manual
No.: SIEP S800001 33)
When
Enabled
Immediately
When Enabled
Immediately
Operating Procedure Reference
Classification
Setup
Classification
Tuning