Machine Diagnosis Function; Servo Amplifier Life Diagnosis Function - Mitsubishi Electric MELSERVO-JE MR-JE-C Instruction Manual

5. MANUFACTURER FUNCTIONS

5.3 Machine diagnosis function

This function estimates the friction and vibrational component of the drive system in the equipment based on
the data in the servo amplifier, and recognizes an error in the machine parts, including a ball screw and
bearing. The information of the machine diagnosis function can be obtained with the following resisters.
2C20h
Bit 0 to Bit 3
Friction estimation status at forward rotation
Bit 4 to Bit 7
Friction estimation status at reverse rotation
Bit 8 to Bit 11
Vibration estimation status
2C21h/2C22h
2C23h/2C24h
2C25h to 2C28h
Address Read/write
2C20h Reading
2C21h Reading
2C22h Reading
2C23h Reading
2C24h Reading
2C25h Reading
2C26h Reading
2C27h Reading
2C28h Reading

5.4 Servo amplifier life diagnosis function

You can check the cumulative energization time and the number of on/off times of the inrush relay based on
the data in the servo amplifier. This function gives an indication of the replacement time for parts of the servo
amplifier including a capacitor and a relay before they malfunction. The information of the servo amplifier life
diagnosis function can be obtained with the following resisters.
Address Read/write
2C18h Reading
2C19h Reading
During estimation
During estimation
During estimation
Undefined value
Undefined value
Undefined value
Name
Machine diagnostic status
Static friction torque at
forward rotation
Dynamic friction torque at
forward rotation
(at rated speed)
Static friction torque at
reverse rotation
Dynamic friction torque at
reverse rotation
(at rated speed)
Oscillation frequency during
motor stop
Vibration level during motor
stop
Oscillation frequency during
motor operating
Vibration level during motor
operating
Name
Power ON cumulative time
Inrush relay ON/OFF number
5 - 4
Data Initial
type value
2 bytes Refer to section 6.1.
Static friction at forward rotation torque is
2 bytes
displayed in increments of 0.1%.
Kinetic friction at forward rotation torque at
2 bytes the rated speed is displayed in increments
of 0.1%.
Static friction at reverse rotation torque is
2 bytes
displayed in increments of 0.1%.
Kinetic friction at reverse rotation torque at
2 bytes the rated speed is displayed in increments
of 0.1%.
Vibration frequency during stop/servo-lock
2 bytes
is displayed in increments of 1 Hz.
Vibration level during stop/servo-lock is
2 bytes
displayed in increments of 0.1%.
Vibration frequency during operation is
2 bytes
displayed in increments of 1 Hz.
Vibration level during operation is
2 bytes
displayed in increments of 0.1%.
Data Initial
type value
The cumulative energization time of the
4 bytes
servo amplifier is returned.
The number of on/off times of the inrush
4 bytes
relay of the servo amplifier is returned.
Estimation completed
Estimation completed
Estimation completed
Estimated value
Estimated value
Estimated value
Description
Description