Mitsubishi QD75M1, User Manual

Page: 734 / 882

15 - 87
MELSEC-Q
15 TROUBLESHOOTING
Related buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
Check point Corrective action
Input signal logic selection
31 181 331 481
• Review operation pattern.
• Install limit switches.
— — — —
Connect correctly.
— — — —
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.
— — — —
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.
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.
Torque limit value
26 176 326 476
OPR torque limit value
86 236 386 536
Torque output setting value
1552 1652 1752 1852
Increase the torque limit value.
— — — —
• Review the power supply capacity.
• Use servomotor which provides larger output.
Positioning gain 1
30113 30213 30313 30413
Increase set value and adjust to ensure proper
operation.
Torque limit value
26 176 326 476
OPR torque limit value
86 236 386 536
Torque output setting value
1552 1652 1752 1852
• When torque is limited, increase the limit value.
• Reduce load.
• Use servomotor that provides larger output.