Siemens SINAMICS G120C Variable Speed Drive

The selected service/maintenance interval for this motor has been reached. The alarm value (r2124) indicates the motor data set number. This alarm signifies that routine maintenance is due for the motor. Ignoring it can lead to decreased performance, potential component wear, or unexpected failures if the underlying maintenance is critical for continued operation.

The alarm threshold for the power semiconductor's depletion layer overtemperature within the AC converter has been reached. This indicates the semiconductor junction is overheating. If the temperature continues to rise by an additional 15 K, it will trigger fault F30025, which can lead to drive shutdown and potential component damage.

The alarm threshold for the air intake temperature of the power unit has been reached, typically at 42 °C. This indicates insufficient cooling or high ambient temperatures affecting the drive's internal environment. If the air intake temperature increases by an additional 13 K, it will lead to fault F30035, likely resulting in a drive shutdown.

The alarm threshold for the rectifier's overtemperature has been reached, indicating excessive heat generation in the input rectifier stage. This can be due to overload or cooling issues. If the rectifier temperature rises by an additional 5 K, it will trigger fault F30037, potentially causing the drive to trip and risking damage to the rectifier components.

This alarm indicates that the calculated temperature difference between the power chip and the heat sink has exceeded the permissible limit, primarily for blocksize power units. It signifies a potential thermal imbalance or overload condition that, if not self-corrected, can lead to fault F30024. The drive initiates an appropriate overload response based on p0290.

An external condition has triggered "External alarm 1," typically via binector input p2112. This alarm indicates an external issue that requires attention but does not immediately stop the drive. Ignoring this alarm risks escalation of the external problem, potentially causing a subsequent fault, damage, or process disruption if the root cause remains unaddressed.

This alarm indicates that the DC link voltage is too low, causing the load supply to be switched out. The alarm value (r2124) displays the DC link voltage at the time of the trip. A common cause is the AC line supply not being switched on or being inadequate. If ignored, the drive will be unable to operate.

The alarm threshold for the power unit's internal temperature has been reached. This indicates that the internal components are operating at elevated temperatures, potentially due to high ambient temperature, insufficient cooling, or a fan failure. If the temperature continues to rise, it may trigger fault F30036, leading to a drive trip and potential hardware damage.

The power supply voltage for the brake has dropped below 21.6V (24V - 10%) when the brake is commanded to open. The alarm value (r2124) indicates the detected voltage. This undervoltage can prevent the brake from opening properly, leading to mechanical binding, potential damage to the brake mechanism, or a failure to start the motor.

Frequencies detected on the DC link voltage suggest line asymmetry or the failure of a line or motor phase. If this alarm persists, it will eventually trigger fault F30011 after a specific duration. This condition causes imbalanced currents, increased losses, and premature component wear, and if unresolved, will lead to a drive trip, interrupting operation.

The power unit has detected an overvoltage condition in the DC link during a pulse inhibit state, likely due to an excessively high device supply voltage or an incorrectly dimensioned line reactor. Persistent DC link overvoltage can critically stress the power electronics, significantly reducing the drive's lifespan. If left unresolved, it can lead to catastrophic hardware failure.

An error occurred during the evaluation of a temperature sensor connected to the power unit. This can manifest as a wire breakage or a disconnected sensor (e.g., KTY: R > 2120 Ohm) or a measured resistance that is too low (e.g., PTC: R < 20 Ohm, KTY: R < 50 Ohm). Accurate temperature monitoring is crucial for protecting the power unit from overheating. If unaddressed, this could lead to undetected overheating and potential damage to components.

This alarm indicates that an event occurred on the power unit which the Control Unit firmware cannot interpret. This typically happens when the power unit has newer firmware than the Control Unit, leading to unrecognized alarm codes. While not immediately critical, it signifies a firmware version mismatch that can obscure actual issues. The risk is that critical alarms might go uninterpreted, leading to delayed troubleshooting or missed underlying problems with the drive.

The drive-integrated "Safety Integrated" function on processor 1 has detected an error and initiated a STOP A. This typically occurs due to an unsuccessful safety shutdown path check or as a consequence of F01611. This fault indicates a critical issue with the safety system, preventing drive operation and requiring immediate attention to ensure machine and personnel safety.

The drive-integrated "Safety Integrated" function on processor 1 has detected a fault in the crosswise data comparison between its two monitoring channels, initiating a STOP F. This often leads to fault F01600 as a subsequent response. A defect in a safety monitoring channel is a critical safety system failure that must be resolved to ensure the safe operation of the machine and compliance with safety standards.

An error has been detected in the evaluation of the motor temperature sensor configured in p0601. This could be due to a wire breakage, the sensor being disconnected (e.g., KTY resistance > 2120 Ohm), or the measured resistance being too low (e.g., PTC resistance < 20 Ohm, KTY resistance < 50 Ohm). The fault causes an OFF1 reaction and prevents proper motor temperature monitoring, risking motor damage from overheating if not resolved.

The closed-loop control parameters have been incorrectly configured, for example, setting p0356 (L_spread) to 0. This fault prevents the drive's control algorithms from functioning correctly, potentially leading to erratic behavior or inability to operate. The fault value (r0949) indicates the specific parameter number that is incorrectly set.

This fault occurs when a macro cannot be executed due to various configuration or data errors. The fault value (r0949, hexadecimal) provides detailed supplementary information, indicating issues such as an invalid file for the trigger parameter, incorrect data types within the macro (e.g., index, number, or bit not U16), undefined error levels or modes, or attempts to write to parameters that are read-only or not available via macro. Such issues prevent automated configuration or specific functions from running.

This fault occurs if the drive fails to successfully restart after the automatic restart monitoring time (p1213) has expired, even after multiple attempts. It can also be triggered if p1213 is set too low relative to other critical timing parameters like p1212, p0346, or flying restart delays, preventing successful motor start-up. The system attempts automatic acknowledgements, but persistent issues or incorrect parameter settings prevent successful restarts, potentially leading to prolonged downtime.

A phase-to-phase short-circuit or a ground fault has been detected at the motor-side output terminals of the converter. The fault value specifies the exact short-circuit type or ground fault with current component. This is a critical electrical fault that can cause immediate and severe damage to the power module or motor, necessitating rapid isolation and repair to prevent costly failures and prolonged downtime.

No rated data is stored in the power unit's EEPROM, meaning the drive lacks essential operational parameters. Without this critical data, the power unit cannot be correctly configured, initialized, or operated. This fault renders the drive inoperable, as attempts to run it without appropriate parameters could lead to unpredictable behavior or damage.

An external condition has triggered "External fault 1," typically via binector input p2106. This fault indicates a critical external issue that has caused the drive to trip. The drive will cease operation, and the external problem must be identified and resolved before the drive can be reset and restarted, ensuring the safety and integrity of the overall system.

This fault indicates a phase failure in the motor feeder cable. It can also occur if the motor stalls in U/f control, leading to zero current in one phase due to current asymmetry, or if closed-speed control is unstable, generating oscillating torque. Note that chassis power units do not monitor this condition. If left unresolved, this can lead to motor damage, drive instability, and unexpected shutdowns.

This fault occurs when the hardware current limitation in a specific phase (U, V, or W, indicated by r0949) has been activated excessively. This points to issues such as incorrect closed-loop control parameters, faults in the motor or power cables, excessively long power cables, high motor load, or a defective power unit. Repeated current limiting causes stress on components and leads to drive shutdowns.

The air intake temperature in the power unit has exceeded the permissible limit, typically 55 °C. This condition signifies critical overheating of the incoming air, often caused by high ambient temperatures, insufficient airflow, or a fan failure. This fault forces an OFF1 or OFF2 reaction, stopping the drive, and cannot be acknowledged until the temperature falls below the alarm threshold of A05002.

The internal temperature of the drive converter has exceeded its permissible operating limit. This critical condition is typically caused by insufficient cooling, a fan failure, sustained overload, or an excessively high ambient temperature. The fault triggers an OFF2 reaction, shutting down the drive, and cannot be acknowledged until the internal temperature has fallen below the permissible limit minus 5 K.

An EEPROM data error has occurred within the power unit module, indicating either inconsistent data (fault values 0, 2, 3, 4) or data incompatible with the Control Unit firmware (fault value 1). This error implies a critical issue with the power unit's fundamental configuration or operational data. The drive cannot function correctly or safely until the corrupted data source is replaced.

An overcurrent condition has been detected in the braking chopper circuit. This signifies excessive current flow, often due to a short-circuited braking resistor or an improperly sized external resistor. An overcurrent can severely damage the braking chopper or resistor, leading to a complete loss of braking capability, uncontrolled deceleration, or even a fire hazard if sustained.

The internal cooling fan of the power unit has failed and is likely defective. Proper cooling is crucial for maintaining the power unit's operational temperature. A malfunctioning fan leads to inadequate heat dissipation, risking severe overheating, thermal trips, reduced performance, and potentially permanent damage to the power unit if not replaced.

At least one actual value channel on the Power Stack Adapter (PSA) has been detected as incorrect. This means the drive is receiving erroneous feedback for critical operational parameters, compromising its control algorithms. Inaccurate actual values can lead to unstable motor operation, incorrect control responses, or damage to the motor or drive due to misinterpretation of real-time conditions.

The drive-integrated "Safety Integrated" function on processor 2 has detected an error and initiated a STOP A. This is often caused by an unsuccessful forced checking procedure of the safety shutdown path or as a consequence of F30611. This fault indicates a critical issue within the safety system, preventing drive operation and requiring immediate resolution to maintain machine and personnel safety.

An unhandled internal software error has occurred within the power unit. The fault value (r0949) is intended for internal Siemens troubleshooting only. This indicates a critical software malfunction that prevents proper operation. The primary risk is complete drive failure and inability to operate the equipment.

This fault signifies a communication error on the I2C bus, typically with an EEPROM or an A/D converter within the power unit. The fault value (r0949) provides specific detail: 80000000 hex indicates an internal software error, while 00000001-0000FFFF hex points to a module fault. This can lead to incorrect readings, configuration issues, or unreliable operation. The risk is complete or partial failure of the affected module.

An internal software error has occurred within the power unit. The fault value (r0949) provides information about the fault source, intended for internal Siemens troubleshooting. This indicates a critical software malfunction within the power unit, preventing normal operation. The risk is complete drive failure and inability to operate the connected equipment.