Schneider Electric Altistart 22 Soft Starter

The Modbus slave device did not recognize or support the requested function code. This indicates the master is attempting an operation not implemented by the slave's Modbus protocol. Unresolved, this prevents the master from controlling or reading the slave using that specific function.

The Modbus request attempted to access a bit or word address that does not exist in the slave device's memory map. This means the master is querying or writing to an unsupported register location. Continuous invalid address attempts will lead to communication errors and prevent proper data exchange or control.

The Modbus request included a bit or word value that is outside the permissible range or format for the specified address in the slave device. This indicates the data being written is unacceptable for that particular register. Writing invalid values can cause unexpected behavior, misconfiguration, or failure of the slave device to operate correctly.

The Modbus slave device started but could not complete the requested operation. This can occur due to the slave being busy, encountering an internal processing error, or hitting a resource limitation. This prevents the requested action from completing, leading to an incomplete operation or data acquisition.

An alarm indicating a problem with the keypad's physical keys. This can be triggered by a key being held down continuously for too long, a disconnected membrane switch, or a key being pressed during keypad power-up.

The soft starter detected an invalid or corrupted configuration during its power-up sequence. This prevents proper initialization and operation, as the device cannot load a valid set of parameters.

The communication link between the remote keypad and the soft starter has been interrupted. This message flashes after 20 retries within a 50 ms timeout, indicating a loss of connection.

A fault has been detected with the keypad's Central Processing Unit (CPU). This signifies a critical internal hardware failure of the keypad, preventing it from functioning correctly.

The motor's embedded PTC (Positive Temperature Coefficient) probes have detected an excessive temperature, indicating that the motor is overheating. This is a critical fault that can lead to rapid motor degradation and failure if not addressed.

An external protective device or condition, wired to the soft starter's external fault input, has triggered a trip. This indicates a problem originating from a component or system outside the soft starter itself.

Excessive current leakage to ground has been detected, indicating a potential insulation breakdown. This is a critical safety issue that can result in electric shock, equipment damage, or fire.

An internal hardware or software error has occurred within the soft starter itself. This signifies a malfunction of the device's internal components or firmware.

The motor is drawing current that exceeds its rated capacity, indicating an excessive load, mechanical binding, or an electrical issue. This condition can lead to motor overheating and premature failure.

The soft starter has detected an internal temperature that is outside its safe operating range (either too high or too low). Overheating can damage the soft starter components, while extremely low temperatures might affect performance.

The motor has experienced a sustained overload condition, drawing current above its rated value for an extended period. This can lead to severe motor overheating, insulation damage, and eventual motor failure.

The input line voltage supplied to the soft starter has exceeded the permissible limits. This condition can potentially damage the soft starter's power components and other connected equipment.

One or more incoming line phases to the soft starter are either completely missing or have significantly reduced voltage. This leads to single-phasing conditions which are highly destructive to three-phase motors and can damage the soft starter.

A significant unbalance in the line voltages or currents across the three phases has been detected. This condition can cause excessive heating and stress on the motor and soft starter, leading to reduced lifespan and premature failure.

The sequence of the incoming line phases (L1, L2, L3) does not conform to the expected sequence configured by the 'PHr' parameter in the soft starter. This can cause the motor to rotate in the incorrect direction or prevent it from starting.

A short circuit has been detected on the soft starter's output, typically between motor phases or from a phase to ground. This is a severe fault that can cause immediate and significant damage to the soft starter and motor.

The Modbus serial communication link experienced a timeout, meaning the soft starter did not receive an expected message or acknowledge within the configured timeframe. This indicates a disruption or issue with the communication network.

One or more thyristors within the soft starter have been detected as shorted, or an incorrect motor connection has been identified. This fault prevents proper current control and can lead to uncontrolled motor operation or damage.

The soft starter has exceeded the maximum number of motor starts allowed within a defined time period ('SLG' period, as configured by the 'Snb' parameter). This protection mechanism prevents excessive thermal stress on the motor and soft starter from frequent starting attempts.

The motor's acceleration period exceeded the maximum allowed starting time ('tLS' parameter). This often indicates that the motor is struggling to accelerate, possibly due to excessive load, an undersized soft starter, or incorrect parameter settings.

The motor is drawing significantly less current than expected for its configured operating conditions. This typically indicates a loss of mechanical load, a broken belt/coupling, or an issue with the motor itself running unloaded.

The input line voltage supplied to the soft starter has dropped below the permissible operating limits or is entirely absent. This condition prevents proper operation and can lead to control issues or motor stoppage.

A fault has been detected with the soft starter's bypass contactor, indicating an issue with its operation or associated wiring. This prevents the soft starter from entering or maintaining bypass mode, which can lead to motor stoppage or inability to start.

The type or brand of the connected remote keypad does not match the type or brand of the Altistart 22 soft starter. This incompatibility prevents proper communication and control, as the devices are not designed to work together.

A fault has been detected in the keypad's Random Access Memory (RAM), which is used for temporary data storage during operation. This indicates an internal hardware failure within the keypad.

A fault has been detected in the keypad's Read-Only Memory (ROM), which stores the keypad's firmware and essential data. This indicates an internal hardware failure within the keypad itself.

This message is displayed after an 'SnbF' (Too many starts) trip when a technician attempts to reset the soft starter before its internal cool-down timer has fully expired. It indicates a mandatory waiting period to allow the soft starter components to cool.

A low-level internal software error or exception has occurred within the soft starter's firmware. This indicates a serious internal malfunction that requires attention, often pointing to a hardware or firmware integrity issue.