: A physical failure of the spindle speed switching contactors or the relay responsible for the Automatic Tool Changer (ATC) arm brake can prevent the system from completing its power-on sequence.
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| 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. |
When this battery voltage drops to zero or the connection breaks, the encoder memory wipes clean. The machine immediately throws the 7115 alarm because it no longer knows where its physical axes are located. Primary Causes of the 7115 Alarm
: A physical failure of the spindle speed switching contactors or the relay responsible for the Automatic Tool Changer (ATC) arm brake can prevent the system from completing its power-on sequence.
Did this occur during a or during normal production ? Share public link fanuc 7115 alarm
| 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. | : A physical failure of the spindle speed
When this battery voltage drops to zero or the connection breaks, the encoder memory wipes clean. The machine immediately throws the 7115 alarm because it no longer knows where its physical axes are located. Primary Causes of the 7115 Alarm | | | Parameter 1420 (reference point return