34 TROUBLESHOOTING
34.2 Servo Motor, Stepping Motor
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34.2 Servo Motor, Stepping Motor
If the servo motor or the stepping motor does not operate, check the following items.
1. Check the wiring.
For the output specifications, refer to Page 353 Output Specifications.
For details on the MELSERVO series servo amplifier (drive unit), refer to the manuals for the unit used.
2. Execute the positioning instruction, and then check the statuses of the following LED indicator lamps. (Page 568
LED Status During Pulse Output and Rotation Direction Output)
• LED indicator lamp of the output specified as the pulse output destination device
• LED indicator lamp of the output specified as the rotation direction output device
3. Verify that the same pulse output method is being applied for both the PLC and the servo amplifier (drive unit). (Page
382 Pulse Output Mode)
4. Check that the flag which stops the pulse is off. (Page 421 Pulse output stop)
5. Check the operation timing of the positioning instruction. (Page 556 Positioning instruction activation timing)
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