5. MANUFACTURER FUNCTIONS
5 - 4
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.
During estimation
2C20h
2C21h/2C22h
2C23h/2C24h
2C25h to 2C28h
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
Estimation completed
Estimation completed
During estimation
Estimation completed
During estimation
Undefined value
Estimated value
Undefined value
Estimated value
Undefined value
Estimated value
Address Read/write
Name
Data
type
Initial
value
Description
2C20h
Reading
Machine diagnostic status
2 bytes
Refer to section 6.1.
2C21h Reading
Static friction torque at
forward rotation
2 bytes
Static friction at forward rotation torque is
displayed in increments of 0.1%.
2C22h Reading
Dynamic friction torque at
forward rotation
(at rated speed)
2 bytes
Kinetic friction at forward rotation torque at
the rated speed is displayed in increments
of 0.1%.
2C23h Reading
Static friction torque at
reverse rotation
2 bytes
Static friction at reverse rotation torque is
displayed in increments of 0.1%.
2C24h Reading
Dynamic friction torque at
reverse rotation
(at rated speed)
2 bytes
Kinetic friction at reverse rotation torque at
the rated speed is displayed in increments
of 0.1%.
2C25h Reading
Oscillation frequency during
motor stop
2 bytes
Vibration frequency during stop/servo-lock
is displayed in increments of 1 Hz.
2C26h Reading
Vibration level during motor
stop
2 bytes
Vibration level during stop/servo-lock is
displayed in increments of 0.1%.
2C27h Reading
Oscillation frequency during
motor operating
2 bytes
Vibration frequency during operation is
displayed in increments of 1 Hz.
2C28h Reading
Vibration level during motor
operating
2 bytes
Vibration level during operation is
displayed in increments of 0.1%.
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
Name
Data
type
Initial
value
Description
2C18h
Reading
Power ON cumulative time
4 bytes
The cumulative energization time of the
servo amplifier is returned.
2C19h
Reading
Inrush relay ON/OFF number
4 bytes
The number of on/off times of the inrush
relay of the servo amplifier is returned.
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