Fanuc αi series AC Servo Motor

A parameter that requires a power-down cycle has been specified or modified. The system requires a power cycle to apply the changes and clear this alarm.

The feedrate specified using a function code is set to zero, which is an invalid value for motor operation.

The specified maximum feedrate, controlled by parameter No.043, is set to zero. This prevents any motor movement, as the maximum allowable speed is effectively zero.

More than 32 blocks have been registered for a buffering operation. The system's buffering capacity has been exceeded, leading to this alarm.

Reference position setting could not be executed normally. This indicates a failure in establishing the machine's reference point.

A first to third reference position return cannot be executed because the reference position has not yet been established, or an external setting was attempted without an Absolute pulse coder.

The reference position has not yet been established. This condition specifically occurs when the ZRTN bit of parameter No.001 is set to 0, preventing the system from confirming its home position.

Input data 1 or a command specified with a function code is invalid. This means the system received an unrecognized or improperly formatted input.

Input data 2 specified with a function code is invalid. This indicates an issue with the format or value of the second input data.

An invalid function code or mode has been specified, preventing the system from performing the requested operation. This could be due to an incorrect command or an unsuitable operating mode.

Operation cannot be activated because either an invalid mode is specified or a block execution is currently in progress. The system is either in an incompatible state or busy.

The interface switch signal (DRC) was switched while a block was being executed. This unexpected change during an active operation can lead to system instability or incorrect behavior.

The speed of an axial movement specified by an external pulse has exceeded its upper limit. This alarm is active only when the EPEXA bit of parameter No.001 is set to 1, indicating an overspeed condition from external command.

A checksum error was detected in the nonvolatile memory, indicating potential data corruption. This usually results in parameters being cleared.

The software version between the FROM on the CPU and the EPROM is identical, which indicates an anomalous or misconfigured state, as these should typically differ or be distinct components.

A CRC check alarm for the EPROM was detected, indicating data corruption or an issue with the EPROM's integrity.

A communication error (DTER) was detected for the serial pulse coder. This can be caused by physical damage to the signal cable, a defective pulse coder or servo amplifier module, or external electrical noise interference.

A communication error (CRCER) was detected for the serial pulse coder, indicating a data integrity issue during serial communication. Potential causes include cable faults, component defects, or external noise.

A communication error (STBER) was detected for the serial pulse coder, suggesting a problem with data synchronization or framing during serial communication. This can be due to cable issues, faulty components, or noise.

An LED disconnection (LDAL) was detected within the serial pulse coder. This indicates an internal failure of the pulse coder's light-emitting diode, essential for its operation.

A mispulse alarm (PMAL) was detected for the serial pulse coder, indicating that the coder is generating incorrect or spurious pulses. This typically points to an internal fault within the pulse coder.

A miscount alarm (CMAL) was detected for the serial pulse coder, indicating an error in counting pulses. This suggests a problem with the pulse coder's counting mechanism or an intermittent fault.

The motor has overheated (OHAL), causing its internal thermostat to trip. This indicates that the motor's operating temperature has exceeded safe limits, potentially due to severe conditions or high ambient heat.

A soft phase alarm (SPHAL) was detected. This type of alarm often points to issues with the motor's phase current detection or can be triggered by external electrical noise affecting the control signals.

The servo motor has overheated, indicated by an estimated temperature exceeding safe operating limits. This suggests that the motor's operating conditions may be excessively severe, leading to thermal stress.

The DRDY (Drive Ready) signal has transitioned to 0, indicating that the servo amplifier is not in a ready state. This often occurs during initial power-up or after a fault, preventing motor operation.

The regenerative discharge unit has overheated, typically triggered when the average regenerative discharge energy is excessively high, such as during frequent acceleration/deceleration cycles. This can also indicate connection issues or component failure within the unit.

Reference position return could not be executed correctly. This alarm can be triggered if parameter No. 032 (CMR) is configured with a value within the range of 4 to 96.

This alarm indicates that an unexpected disturbance torque has been detected on the servo motor, signaling an abnormal load condition. If the issue is not mechanical, it may stem from an incorrectly set alarm threshold.

The servo position error in the stopped state is larger than the value specified in parameter No.110. This indicates that the motor is not holding its commanded position accurately while stationary, possibly due to mechanical backlash or insufficient holding torque.

The servo position error during movement is larger than the value specified in parameter No.182. This suggests that the motor is not accurately following its commanded trajectory during motion, indicating potential mechanical issues or inadequate control tuning.

An Over Current Alarm has been issued, indicating an excessively large current flow in the main circuit. This is a critical alarm that can result from incorrect motor parameters, short-circuits in the motor or power line, amplifier malfunction, or noise.

A DC Link Over Voltage Alarm has been issued, indicating that the DC voltage in the main circuit power is excessively high. This can be caused by overvoltage from the supply, excessive regenerative energy, or issues with the regenerative discharge unit.

A DC Link Low Voltage Alarm has been issued, indicating that the DC voltage of the main circuit power is too low. This can result from insufficient supply voltage, issues with external contactors, or delayed power-up sequences.

An Inverter IPM Alarm has been issued, indicating a fault within the Intelligent Power Module (IPM) of the inverter. This is often caused by overheating due to cooling issues, motor overcurrent, high ambient temperatures, or insulation breakdown.

A parameter has been specified incorrectly, causing an alarm. This can arise from conflicting motor ID settings, invalid values for rotation direction, zero values for critical ratios, or out-of-range settings for gains and capacities.

This alarm indicates that the specified speed exceeds 32767000 detection units per second. This suggests an incorrect configuration of motion parameters, potentially leading to instability or performance issues.

This alarm is issued when the fan motor built into the servo amplifier module, used for internal agitation, has failed. The fan motor is a consumable component, and its failure can lead to overheating of the servo amplifier if not addressed.

This alarm signifies that the external pulse input line is disconnected. This will prevent proper external control or feedback to the system, halting operations that rely on external pulsing.

The velocity deviation is too high, indicating a problem in the velocity control loop. This could be due to an actual velocity that does not match the commanded velocity or improper parameter settings, leading to poor motion control.

Parameter No.080 is not corrected, meaning its value is out of the specified range (0 to 8010). Incorrect parameter settings can lead to system malfunction or unexpected operational behavior.

The machine has exceeded its positive stroke limit. This indicates a physical limit switch activation or an incorrect move command, which can cause mechanical interference or damage.

The machine has exceeded its negative stroke limit. This indicates a physical limit switch activation or an incorrect move command, which can cause mechanical interference or damage.

The machine has exceeded its positive soft stroke limit, which is a software-defined limit. This indicates incorrect parameter settings for soft limits (No.142) or an invalid move command, potentially causing an unexpected stop.

The machine has exceeded its negative soft stroke limit, a software-defined boundary. This suggests improper parameter configuration for soft limits (No.143) or an invalid motion command, leading to an unexpected stop.

This alarm is issued when the fan motor responsible for cooling the external radiator fin of the inverter has failed. This fan is a consumable part. Failure can lead to inverter overheating and potential damage if not addressed.

An error was detected in the control circuit. This is a general indication of a hardware or internal logic fault within the servo amplifier, potentially leading to a complete loss of control.

A low voltage condition was detected on the 24-VDC control supply. Insufficient control voltage can lead to unpredictable behavior or complete system shutdown, affecting connected control components.

A CRC (Cyclic Redundancy Check) alarm for the FROM (Flash Read-Only Memory) built into the CPU is issued. This indicates potential corruption or integrity issues with the firmware stored in the CPU's memory, affecting core functionality.

Loading of a software on the FROM (Flash Read-Only Memory) built into the CPU is incomplete. This can also indicate an error in the internal RAM write/read test at power-up or a general control circuit error, preventing proper system initialization.

The logic supply voltage was detected as being less than 5V. This critical low voltage can prevent proper operation of the control circuitry, leading to system shutdown or unpredictable behavior.

An error was detected in the data collation check for the nonvolatile memory. This indicates potential data corruption in stored parameters or system configurations, requiring re-entry of parameters.

A data transfer alarm for the nonvolatile memory has been issued. This indicates an issue with reading or writing data to the nonvolatile memory, which can prevent proper system configuration or operation.

An error was detected during the RAM write/read test for external SRAM at power-up. This indicates a potential hardware failure within the servo amplifier module's memory, which can prevent the system from booting correctly.

An alarm for the servo amplifier module related to 'Dead-band 0'. This likely indicates an issue with the control dead-band settings or its functionality, potentially causing erratic motion or control instability.

An alarm for the servo amplifier module related to the timer for skip position measurement. This suggests an issue with a specific motion control function or its timing, which can affect precision operations.

An alarm indicating a synchronous deviation for the servo amplifier module. This typically points to a problem with motor synchronization or control loop stability, leading to inaccurate motion.

A watchdog alarm 1 was issued, indicating a system malfunction where the internal watchdog timer detected a deviation from expected operation. This is typically a severe internal error, pointing to a critical processor or software issue.

A watchdog alarm 2 was issued, indicating a system malfunction where the internal watchdog timer detected a deviation from expected operation. This is typically a severe internal error, pointing to a critical processor or software issue.

A watchdog alarm 3 was issued, indicating a system malfunction where the internal watchdog timer detected a deviation from expected operation. This is typically a severe internal error, pointing to a critical processor or software issue.