Mitsubishi Electric MELSEC-Q QD75M User Manual page 726

15 TROUBLESHOOTING
Related buffer memory address
Axis 1 Axis 2 Axis 3
— — —
— — —
— — —
Auto tuning
30108 30208 30308
Servo response
30109 30209 30309
Input signal logic selection
31 181 331
— — —
— — —
Input signal logic selection
31 181 331
— — —
Auto tuning
30108 30208 30308
Servo response
30109 30209 30309
— — —
Check point
Axis 4
—
—
—
30408
30409
481
—
When the servomotor shaft is
rotated with the servo off, the
cumulative feedback pulses should
—
vary in proportion to the rotary
angle. If the indication skips or
returns midway the encoder if faulty.
481
—
30408
30409
When the servomotor shaft is
rotated with the servo off,
the cumulative feedback pulses
— should vary in proportion to the
rotary angle. If the indication skips
or returns midway the encoder if
faulty.
• Change the servo amplifier or cooling fan.
• Reduce ambient temperature.
The drive method is reviewed.
Change the servo amplifier.
Review environment so that ambient temperature
is 0 to 40°C.
• Reduce load.
• Review operation pattern.
• Use servomotor that provides larger output.
Change the servomotor.
• Reduce load.
• Review operation pattern.
• Use servomotor that provides larger output.
• Repeat acceleration/deceleration to execute
" Pr.108 Auto tuning".
• Change " Pr.109 Servo response" setting.
• Set " Pr.108 Auto tuning" to OFF and make gain
adjustment manually.
• Review operation pattern.
• Install limit switches.
Connect correctly.
Change servomotor.
• Review operation pattern.
• Install limit switches.
Connect correctly.
• Repeat acceleration/deceleration to execute
" Pr.108 Auto tuning".
• Change " Pr.109 Servo response" setting.
• Set " Pr.108 Auto tuning" to OFF and make gain
adjustment manually.
Change the servomotor.
15 - 63
MELSEC-Q
Corrective action