Prevents unexpected downtime and loss of machine reference points. Check Diagnostic Screen
If the axis is locked up or requires extreme force to move, resolve the mechanical jam, check the gib adjustments, and verify the automatic lubrication system is functioning. How to Fix and Resolve Alarm 7115
Problems in the Power Supply Module (such as an abnormally high DC link) can cascade into servo alarms.
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Disclaimer: This article is based on FANUC documentation and field experience. Always consult your machine tool builder’s specific documentation before altering parameters or ladder logic. Machine specifications vary. fanuc 7115 alarm
Broken wire in the feedback circuit between the contactor and the PMC. Troubleshooting Steps for FANUC 7115
Common Causes
Before purchasing expensive replacement parts, follow this troubleshooting sequence to isolate the exact cause of the 7115 alarm. Step 1: Physical Inspection and Safety First Power down the CNC machine completely. Lock out and tag out the main breaker.
What are you running (e.g., 0i-D, 0i-F, 31i)? Did the alarm occur after a long weekend or shutdown ? Prevents unexpected downtime and loss of machine reference
A serial spindle link error often caused by improper cable connections or the spindle unit's power being off.
The is an EtherNet/IP Error typically indicating a communication failure or configuration mismatch between the FANUC robot (acting as either a Scanner or Adapter) and a remote device . Direct Meaning
FANUC 7115 alarm is a spindle-related fault, typically identified as the SP Switch Control Alarm
The FANUC 7115 alarm can be triggered by a variety of factors, including: To help me provide more tailored guidance, please
Navigate to . Look for diagnostic address DGN 300 or 400 (model dependent). These bits will tell you where the I/O link failed.
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. This occurs when the spindle switching conditions—often related to gear changes or high/low winding shifts—are not satisfied within a specified timeframe. Common Causes Winding Selection Failure:
Use a multimeter to measure the DC voltage of the battery pack.