Fanuc Macro B CNC Programming

This alarm occurs in the αi PSR (Power Supply, Resistance Discharge Type) when a spindle motor with a maximum output of 5kW or more is decelerated while an inappropriate 16Ω regenerative discharge unit is used. The unit cannot dissipate the excess regenerative energy.

An over-current of the DC link current occurred during the power running phase of the motor operation as detected by the Energy Charge Module (ECM). This indicates that the motor is drawing excessive current, potentially due to an overload, short circuit, or amplifier malfunction, which the ECM attempted to assist.

An over-current of the DC link current occurred during motor deceleration (regeneration) as detected by the Energy Charge Module (ECM). This suggests that the regenerative energy is too high for the system to store or dissipate, potentially due to insufficient ECM capacity, rapid deceleration, or a fault in the regenerative circuit.

An over-current occurred in the charge current to the Energy Charge Module's (ECM) Capacitor Modules. This indicates a problem in the charging circuit, potentially due to a fault in the ECM's Control Module (A06B-6158-H010), the Capacitor Module itself, or an unstable power supply.

An over-current occurred in the discharge current from the Energy Charge Module's (ECM) Capacitor Modules. This suggests an issue with the energy being released, possibly due to a fault in the ECM's discharge circuit, the Resistor Module (A06B-6158-H030), or an external short circuit drawing excessive power.

The 24V control power supply voltage to the Energy Charge Module (ECM) or Servo amplifier is low. This critical condition prevents proper operation of the ECM and associated components, indicating a problem with the external 24V power source or its connections.

An over-voltage condition has occurred in the DC link connected to the Energy Charge Module (ECM) and Servo amplifier. This is typically caused by excessive regenerative energy from the motor that cannot be dissipated or stored, or an unstable main power supply exceeding nominal limits.

An over-voltage condition has occurred in the Energy Charge Module's Capacitor Modules. This implies the capacitor bank is being charged beyond its rated voltage, potentially due to a fault in the charging control circuit, an issue with the Resistor Module, or an external over-voltage condition.

A low-voltage condition has occurred in the Energy Charge Module's Capacitor Modules. This indicates that the capacitor bank is not sufficiently charged or is discharging too rapidly, potentially due to a power supply issue, excessive load on the ECM, or a faulty capacitor module.

The Energy Charge Module's (ECM) Control Module has detected an abnormal over-heat condition via its built-in thermostat. Continuous operation in this state can shorten the life of electronic components and degrade ECM performance, potentially leading to other failures.

The cooling fan for the heat sink of the Energy Charge Module's (ECM) Control Module has stopped. This will lead to overheating of the Control Module, potentially shortening component life or triggering other temperature-related alarms (e.g., Over-heat of Control Module, LED 9).

A general alarm condition has occurred within the power supply unit of the Energy Charge Module (ECM). This indicates a problem with the main power input to the ECM or its internal power conversion circuitry.

The Energy Charge Module's (ECM) Capacitor Modules are not charging normally. This indicates a failure in the charging process, possibly due to a fault in the Capacitor Module itself (A06B-6158-H020), the charging control circuit, or insufficient power supply.

The Energy Charge Module's (ECM) Capacitor Modules are not discharging as expected, possibly due to a fault in the Resistor Module (A06B-6158-H030) or its control circuit. This indicates a failure in the controlled release of stored energy, which could lead to overvoltage.

The Energy Charge Module's (ECM) Capacitor Modules are discharged due to a malfunction of the discharge circuit, rather than a commanded discharge. This indicates an uncontrolled or premature release of stored energy, suggesting a more severe failure within the discharge control mechanism or the Resistor Module itself.

The Energy Charge Module's (ECM) Resistor Module has detected an over-heat condition via its built-in thermostat. This indicates excessive energy dissipation, possibly due to continuous regeneration, high ambient temperature, or a fault in the cooling of the resistor module, leading to potential damage.

A communication error occurred between Energy Charge Module (ECM) units or with connected devices. This indicates a problem in the data exchange between the ECM's Control Module (A06B-6158-H010) and other connected units like the Servo amplifier or PMC.

Communication between the spindle sensor and the spindle amplifier is not performed. This indicates a problem in the data transmission/reception path between these components, preventing normal operation and potentially leading to unexpected machine behavior.

Serial data transmission/reception is not performed normally between the spindle sensor and amplifier. This suggests an issue with the integrity or timing of data transfer, potentially causing inaccurate position or speed feedback and affecting spindle control.

An abnormal acceleration rate was detected in the spindle motor. This alarm indicates that the spindle experienced an unexpected or excessive acceleration, which could be due to a mechanical issue, an incorrect control parameter, or a faulty feedback system.

An error occurred in the interpolation circuit of the spindle control. This typically means the spindle's position feedback signals, processed by the interpolation circuit, are inconsistent or incorrect, potentially caused by sensor issues, feedback cable problems, or electrical noise.

The number of pulses between one phase Z and another from the spindle sensor is shifted by 4λ or more. This indicates a significant discrepancy in the phase Z signal, which is critical for absolute position detection, suggesting a fundamental sensor or feedback cable issue.

The spindle system failed to establish an absolute position within 5 turns after communication between the spindle amplifier and sensor started. This prevents the system from finding the spindle's home position, which is crucial for normal operation.

The potential difference across the Energy Charge Module's (ECM) Capacitor Modules is detected to be more than 300V, indicating an unsafe high voltage condition. This suggests a failure in the charging or discharge control, or a dangerous energy imbalance within the module.

The circuit responsible for controlling the current of the Energy Charge Module (ECM) has malfunctioned. This is a critical internal fault within the ECM Control Module (A06B-6158-H010), affecting its ability to manage charge and discharge currents, leading to unstable operation.

A fuse within the Energy Charge Module (ECM) Capacitor Module has blown. This indicates an overcurrent condition within the Capacitor Module, likely due to a short circuit, an internal fault in the capacitors, or improper operation.