Mitsubishi QD75M1, User Manual

Page: 696 / 882

15 - 49
MELSEC-Q
15 TROUBLESHOOTING
Related buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
Check point Corrective action
Regenerative resistor brake option
30102 30202 30203 30204
Set correctly.
— — — —
Connect correctly.
— — — —
Call the status display and check
the regenerative load ratio.
• Reduce the frequency of positioning.
• Use the regenerative brake option of larger
capacity.
• Reduce the load.
Review power supply.
— — — —
Change the regenerative brake option.
— — — —
• The regenerative brake option
has overheated abnormally.
• The alarm occurs even after
removal of the built-in
regenerative brake resistor or
regenerative brake option.
Change the servo amplifier.
Change the servo amplifier or regenerative brake
option.
Load inertia ratio
30112 30212 30312 30412
Increase acceleration/deceleration time constant.
Acceleration time
12, 13 162, 163 312, 313 462, 463
36, 37 186, 187 386, 387 486, 487
38, 39 188, 189 338, 389 488, 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
• Reset servo gain to proper value.
• If servo gain cannot be set to proper value:
(1) Reduce " Pr.112 load inertia moment ratio";
or
(2) Reexamine acceleration/ deceleration time
constant.
— — — — Change servomotor.
— — — —
Correct the U, V, W phase wiring of the servo
amplifier.
— — — —
Alarm (A.32) occurs if power is
switched on after disconnection
of the U, V, W phase power
cables.
Change the servo amplifier.
Correct the U, V, W phase wiring of the servo
amplifier.
— — — —
Take noise suppression measures.