: The mechanical or electrical failure of the spindle speed switching contactors themselves.
| Cause Category | Specific Cause | | :--- | :--- | | | Parameter 1006#5 (ZMI – direction of reference point return) is set incorrectly for the axis. | | | Parameter 1420 (reference point return FL speed) too low, causing the axis to stop before the decel dog. | | | Parameter 3004#5 (reference point return direction check) set to 0 (check enabled) – default is 1 (skip check). | | Hardware/Positioning Issue | Axis is physically positioned beyond the deceleration dog in the opposite direction of reference return. | | | Deceleration limit switch (decel dog) is stuck ON (closed) at power-up. | | | Incorrect decel dog placement or length. | | | Encoder zero pulse (1-revolution signal) missing or intermittent. | | Signal Problem | *DECX (*DEC1, *DEC2, *DEC3) signal is inverted or faulty. | | | DI/DO module failure providing wrong decel dog input. | fanuc 7115 alarm
Here is where I find the problem 99% of the time: : The mechanical or electrical failure of the