Mitsubishi QD75M4 - Page 720

15 - 73
MELSEC-Q
15 TROUBLESHOOTING
Related buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
Check point Corrective action
— — — —
• Reduce load.
• Review operation pattern.
• Use servomotor that provides larger output.
Auto tuning
30108 30208 30308 30408
Servo response
30109 30209 30309 30409
• 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.
Input signal logic selection
31 181 331 481
• Review operation pattern.
• Install limit switches.
— — — —
Connect correctly.
— — — —
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 servomotor.
Input signal logic selection
31 181 331 481
• Review operation pattern.
• Install limit switches.
— — — —
Connect correctly.
Auto tuning
30108 30208 30308 30408
Servo response
30109 30209 30309 30409
• 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 servo amplifier.
— — — —
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 servomotor.
Acceleration time
12, 13 162, 163 312, 313 482, 483
36, 37 186, 187 336, 337 486, 487
38, 39 188, 189 338, 339 488, 489
40, 41 190, 191 340, 341 490, 491
Deceleration time
14, 15 164, 165 314, 315 464, 465
42, 43 192, 193 342, 343 492, 493
44, 45 194, 195 344, 345 494, 495
46, 47 196, 197 346, 347 496, 497
Increase the acceleration/deceleration time
constant.