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MELSEC-Q
15 TROUBLESHOOTING
Related buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
Error
check
timing
Error
process-
ing
Check point Corrective action
Acceleration time
12, 13 162, 163 312, 313 462, 463
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.
Model loop gain
30125 30325 30525 30725
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.
Input signal logic selection
31 181 331 481
• Review operation pattern.
• Install limit switches.
— — — —
Change the servomotor.
— — — —
Connect correctly.
— — — —
Always
Change the SSCNET
cable.
— — — —
Use correct combination.
— — — — Always
Imme-
date stop
Servo amplifier error (2088)
occurs if power is switched on
after disconnection of the
CN1A
,
CN1B and CN3
Change servo amplifier.
:
The error check timing is shown below.
• When servo amplifier is power ON.
• When the QD75MH detects the rising edge (OFF
ON) of the PLC READY signal [Y0].
• When servo amplifier is reset.
• When the QD75MH is power ON.