Troubleshooting / Lexium 32 errors

Schneider Lexium 32 Error Codes

The most common error codes of Schneider Electric Lexium 32 servo drives (LXM32A, LXM32C, LXM32M, LXM32S): what each one means, its error class, the likely causes, the first checks with the parameters to look at, and how to log it so it stops coming back.

How errors show

The integrated HMI on the drive front is a 4-digit 7-segment display that normally shows the operating state (for example rdy or run). On an error of class 1 it alternates the four-digit hex error code with Stop. On an error of class 2 to 4 it alternates the code with FLt (operating state Fault).

An error of class 0 is a warning: only the two dots at the right of the display flash, and you press and hold the navigation button to see the code. The code of the last class 1 to 4 error is kept in _LastError (HMI menu Mon, LFLt) and the last class 0 error in _LastWarning (Mon, LWrn).

The error memory keeps the last 10 errors even through power off, with error class, code, motor current, temperatures, DC bus voltage, velocity and operating hours; read it with the commissioning software or with _ERR_number after ERR_reset.

Error classes: 0 warning, movement continues; 1 Quick Stop with the power stage still on; 2 Quick Stop, then the power stage switches off at standstill; 3 and 4 switch the power stage off at once.

To reset, fix the cause, then press the navigation button (the display shows FrES) and press it again, or use the signal input function Fault Reset (factory setting on DI1 in local control mode), or send Fault Reset over the fieldbus. Class 4 errors clear only by switching the drive off and on.

On LXM32A, C and M with firmware V01.12 or later, the Enable input can also do a Fault Reset (parameter IO_FaultResOnEnaInp).

Safety first.
Only qualified personnel may work on the drive. Before touching the drive, motor cable or DC bus terminals, disconnect all power, lock it out and wait 15 minutes for the DC bus capacitors to discharge. Then measure between the DC bus terminals PA/+ and PC/- with a meter rated above 800 Vdc and confirm the voltage is below 42 Vdc. A dark DC bus LED does not prove the bus is dead.

If the bus does not fall below 42 Vdc within 15 minutes, do not run or repair the drive and contact Schneider Electric. A turning motor shaft generates voltage, so block the shaft before working on the drive system.

Source: Lexium 32M Servo Drive User Guide 0198441113767.14, pages 14, 15 and 18 (source 1); the same warning is in the LXM32C, LXM32A and LXM32S user guides (sources 2 to 4). Follow lockout/tagout and your site's safe-work procedures, and check the manual for your exact model before you act.

Quick lookup

Errors stop the servo and the axis, so in OEE they are availability losses; warnings let it keep running until you act.

Type a code or a word (STO, DC bus, encoder, limit switch) to filter the list. Click a code for its causes and first checks.

89 codes

CodeTypeName
1300ErrorSafety-related function STO activated (STO_A, STO_B)
1301ErrorSTO_A and STO_B different level
7344ErrorAbsolute position is different from incremental position
A302ErrorStop by positive limit switch
A303ErrorStop by negative limit switch
5200ErrorError detected at connection to motor encoder
3200ErrorDC bus overvoltage
3201ErrorDC bus undervoltage (shutdown threshold)
3202ErrorDC bus undervoltage (Quick Stop threshold)
3206WarningUndervoltage DC bus, missing mains supply, undervoltage mains supply or overvoltage mains supply
3100ErrorMissing mains supply, undervoltage mains supply or overvoltage mains supply
A320ErrorPermissible position deviation exceeded
4100ErrorPower stage overtemperature
4101WarningPower stage overtemperature
4102WarningPower stage overload (I2t)
4200ErrorDevice overtemperature
4300ErrorMotor overtemperature
4301WarningMotor overtemperature
4302WarningMotor overload (I2t)
2300ErrorPower stage overcurrent
7121ErrorSystem error detected: Error in motor encoder communication
1302WarningSafety-related function STO activated (STO_A, STO_B)
5201ErrorError detected in motor encoder communication
5203ErrorError detected in connection motor encoder
5204ErrorConnection to motor encoder lost
5202ErrorMotor encoder is not supported
5206WarningCommunication error detected in encoder
5102ErrorMotor encoder supply voltage
5600ErrorMotor connection phase error detected
5603ErrorCommutation error detected
7343WarningAbsolute position is different from incremental position
7340ErrorReading of absolute position aborted
7321ErrorTimeout reading the absolute position from the encoder
733FErrorAmplitude of encoder analog signals too low
734EErrorError in analog signals from encoder detected
7328ErrorMotor encoder: Position evaluation error detected
7330ErrorSystem error detected: Motor encoder (Hiperface)
7327WarningError bit set in Hiperface answer
7329WarningMotor encoder Warn signal
7345WarningAmplitude of analog signals too high, limit of AD conversion exceeded
7341WarningEncoder overtemperature
7342ErrorEncoder overtemperature
734CErrorError detected with quasi absolute position
7100ErrorSystem error detected: Invalid power stage data
7120ErrorInvalid motor data
7122ErrorInvalid motor data
7124ErrorSystem error detected: Motor encoder inoperative
712DErrorElectronic motor nameplate not found
2301ErrorBraking resistor overcurrent
4402WarningBraking resistor overload (I2t > 75%)
4403WarningBraking resistor overload (I2t > 100%)
4404WarningOverload of transistor for braking resistor
7110ErrorSystem error detected: Internal braking resistor
7112ErrorNo external braking resistor connected
1A01ErrorMotor has been changed (different type of motor)
110DErrorBasic configuration of drive required after factory setting
110BErrorConfiguration error detected
1314ErrorAt least two inputs have the same signal input function
1310ErrorFrequency of the external reference value signal too high
610EErrorSystem error detected: 24 VDC below undervoltage threshold for shutdown
1503ErrorQuick Stop triggered via fieldbus
A300WarningDeceleration after HALT request still running
A301WarningDrive in operating state Quick Stop Active
A304ErrorStop by reference switch
A306ErrorStop by user-initiated software stop
A308WarningDrive is in operating state Fault or Fault Reaction Active
A31EErrorStop by positive software limit switch
A31FErrorStop by negative software limit switch
A31DWarningVelocity range exceeded (parameter CTRL_v_max, M_n_max)
A313WarningPosition overflow, zero point is therefore no longer valid (ref_ok=0)
A324ErrorError detected during homing
A325ErrorLimit switch to be approached not enabled
A326ErrorReference switch not found between positive limit switch and negative limit switch
A329ErrorMore than one signal positive limit switch/negative limit switch/reference switch active
A32DErrorPositive limit switch error detected (switch signal briefly enabled or switch overtraveled)
A32EErrorNegative limit switch error detected (switch signal briefly enabled or switch overtraveled)
A32FErrorIndex pulse not found
A334ErrorTimeout Standstill Window monitoring
A347WarningPermissible position deviation exceeded
A35DErrorPermissible velocity deviation exceeded
A06BErrorPosition deviation in operating mode Electronic Gear too high
1617ErrorAutotuning: Friction torque or load torque too great
1620ErrorAutotuning: Load torque too high
5452ErrorSystem error detected: Data on memory card and device do not match
B201ErrorRS485/Modbus: Interruption of the connection
B202WarningRS485/Modbus: Interruption of the connection
8130ErrorCANopen: Detected Heartbeat or Life Guard error
8141ErrorCANopen: CAN controller is in state 'bus-off'
B610ErrorEtherCAT: Fieldbus watchdog

Each code: causes and first checks

1300: Safety-related function STO activated (STO_A, STO_B)

Hits OEE: Availability

What it means: The STO safety inputs went low while the drive was enabled (Operation Enabled), so the drive cut motor torque by switching off the power stage.[1][2][3][4][5]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Emergency stop, guard door or safety relay opened the STO circuit
  • Broken wire or loose terminal on STO_A or STO_B
  • 24 Vdc feeding the STO inputs is missing or too low

First checks, in this order

  1. Make sure the emergency stop and safety circuit are closed and both STO_A and STO_B see +24 Vdc.
  2. Watch the STO input states in parameter _IO_STO_act (HMI menu Mon, Sto).
  3. Check the STO wiring at connector CN2. If STO is not used, both inputs must be wired to +24 Vdc.
  4. Run a Fault Reset after the STO inputs are high again.

1301: STO_A and STO_B different level

Hits OEE: Availability

What it means: The two STO channels were at different levels for more than 1 second. The drive treats this as a wiring or safety circuit fault and needs a power cycle.[1][2][3][4][5]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • One STO channel wire broken or loose
  • Safety relay with one contact stuck or worn
  • STO channels fed from different sources or bridged together
  • Faulty 24 Vdc supply

First checks, in this order

  1. Measure STO_A and STO_B to 0 V: both must switch high and low together.
  2. Check that the two STO signal wires are isolated from each other.
  3. Test the safety relay or E-stop contacts for both channels.
  4. Switch the drive off and on to clear this class 4 error.

7344: Absolute position is different from incremental position

Hits OEE: Availability

What it means: The drive compares the absolute position read from the motor encoder with the position counted from its sine and cosine signals. The two no longer match, so the drive stops.[1][2][3][4][6]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Electrical noise on the encoder (feedback) cable
  • Damaged or self-made feedback cable, or bent or pushed-in pins in the motor connector
  • Poor grounding of the motor or cable shields
  • Faulty motor encoder

First checks, in this order

  1. Inspect the feedback cable and both connectors, including the pins.
  2. Use original Schneider Electric motor and feedback cables.
  3. Ground the shields of the motor and feedback cables. Ground the motor through its flange, or add a ground conductor of at least 10 mm2.
  4. Swap in a known-good motor and cable to find the faulty part.
  5. If it comes back with good cables, the motor encoder is likely faulty: contact Schneider Electric or replace the motor.

A302: Stop by positive limit switch

Hits OEE: Availability

What it means: The positive limit switch input tripped. The drive made a Quick Stop and, after a Fault Reset, only allows movement in the negative direction.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Axis ran past its movement range
  • Limit switch faulty, or its wire broken (a normally closed switch reads as tripped)
  • Noise on the limit switch signal
  • Switch type in IOsigLIMP does not match the real switch

First checks, in this order

  1. Check where the axis is and whether the switch is really pressed.
  2. Check the switch, its wiring and its 24 Vdc supply.
  3. Check IOsigLIMP (0 inactive, 1 normally closed, 2 normally open) and which input has the function Positive Limit Switch (LIMP).
  4. Do a Fault Reset, then move the axis in the negative direction off the switch.

A303: Stop by negative limit switch

Hits OEE: Availability

What it means: The negative limit switch input tripped. The drive made a Quick Stop and, after a Fault Reset, only allows movement in the positive direction.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Axis ran past its movement range
  • Limit switch faulty, or its wire broken (a normally closed switch reads as tripped)
  • Noise on the limit switch signal
  • Switch type in IOsigLIMN does not match the real switch

First checks, in this order

  1. Check where the axis is and whether the switch is really pressed.
  2. Check the switch, its wiring and its 24 Vdc supply.
  3. Check IOsigLIMN (0 inactive, 1 normally closed, 2 normally open) and which input has the function Negative Limit Switch (LIMN).
  4. Do a Fault Reset, then move the axis in the positive direction off the switch.

5200: Error detected at connection to motor encoder

Hits OEE: Availability

What it means: The drive cannot talk to the motor encoder properly over the encoder connection. This is a class 4 error, so it needs a power cycle.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Encoder cable unplugged, loose or damaged
  • Electrical noise on the encoder cable
  • Wrong or self-made encoder cable

First checks, in this order

  1. Power off, then check the encoder cable and the motor encoder connector (CN3) for damage and bent pins.
  2. Check the cable shield connection and keep the encoder cable away from power cables.
  3. Switch the drive off and on.
  4. If it persists, swap the encoder cable or the motor to find the faulty part.

3200: DC bus overvoltage

Hits OEE: Availability

What it means: The DC bus voltage rose too high, nearly always from energy fed back by the motor while it brakes.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Deceleration ramp too short for the load inertia
  • Braking resistor missing, too small, not enabled or not connected
  • Hanging or overhauling load driving the motor
  • Mains voltage too high

First checks, in this order

  1. Make the deceleration ramp longer (RAMP_v_dec) or reduce the load inertia.
  2. Check the braking resistor settings RESint_ext, RESext_P, RESext_R and RESext_ton and the resistor wiring.
  3. Check that the drive and braking resistor are rated for the braking energy.
  4. Read the DC bus voltage in _UDC_act and check the mains voltage.

3201: DC bus undervoltage (shutdown threshold)

Hits OEE: Availability

What it means: The DC bus voltage fell below the shutdown level, so the power stage was switched off.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Mains power outage or dip
  • Missing mains phase or blown fuse
  • Mains supply too weak for the load

First checks, in this order

  1. Check the mains supply voltage, fuses, contactor and terminals.
  2. Check that MON_MainsVolt matches the real supply (mains or DC bus).
  3. Read _UDC_act while running.

3202: DC bus undervoltage (Quick Stop threshold)

Hits OEE: Availability

What it means: The DC bus voltage fell below the Quick Stop level, so the drive stopped the motor and then switched off the power stage.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Mains power outage or dip
  • Missing mains phase or blown fuse
  • Mains supply too weak for the load

First checks, in this order

  1. Check the mains supply voltage, fuses, contactor and terminals.
  2. Check that MON_MainsVolt matches the real supply.
  3. Read _UDC_act while running.

3206: Undervoltage DC bus, missing mains supply, undervoltage mains supply or overvoltage mains supply

Warning: act before it becomes a stop

What it means: Warning: the mains supply is missing a phase, or its voltage or frequency is outside the allowed range.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • A phase missing for more than 50 ms
  • Mains voltage or frequency out of range
  • MON_MainsVolt does not match the real supply (for example 230 V mains with the 115 V setting)

First checks, in this order

  1. Measure the mains supply and compare it with the drive technical data.
  2. Check the setting of MON_MainsVolt, including the reduced mains voltage settings.
  3. Check fuses, contactor and terminals on each phase.

3100: Missing mains supply, undervoltage mains supply or overvoltage mains supply

Hits OEE: Availability

What it means: A mains phase has been missing for more than 50 ms, or the mains voltage or frequency is out of range. The reaction is set by ErrorResp_Flt_AC.[1][2][3][4]

Drive response: Error class set by ErrorResp_Flt_AC (0 to 3, factory setting 2: Quick Stop, then power stage off); clear with Fault Reset

Likely causes

  • Blown fuse or open contactor contact on one phase
  • Mains voltage or frequency out of range
  • Drive fed from a DC bus while mains phase monitoring is still set for mains supply

First checks, in this order

  1. Measure all mains phases and compare them with the drive technical data.
  2. Check fuses, contactor and terminals.
  3. If the drive is fed only from a DC bus, set MON_MainsVolt to the matching DC bus only setting.
  4. Check ErrorResp_Flt_AC (error class 0 to 3, factory setting 2).

A320: Permissible position deviation exceeded

Hits OEE: Availability

What it means: Following error: the actual position fell too far behind the commanded position because of load.[1][2][3][4]

Drive response: Error class set by ErrorResp_p_dif (1 to 3, factory setting 3: power stage off at once); clear with Fault Reset

Likely causes

  • Load or acceleration too high for the drive and motor
  • Mechanical binding, jammed axis or holding brake not releasing
  • Control loop not tuned for the load
  • Maximum deviation set too tight

First checks, in this order

  1. Check that the axis moves freely and the holding brake opens.
  2. Reduce the load or the acceleration.
  3. Read _p_dif_load_peak_usr and compare it with the limit MON_p_dif_load_usr.
  4. Check ErrorResp_p_dif (error class 1 to 3, factory setting 3) and re-run tuning if the load changed.
  5. If needed, use a larger drive or motor.

4100: Power stage overtemperature

Hits OEE: Availability

What it means: The power stage heat sink is too hot, so the drive switched the power stage off.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Ambient temperature in the cabinet too high
  • Dust on the heat sink
  • Drive fan failed (if fitted)
  • Not enough mounting clearance or cabinet ventilation

First checks, in this order

  1. Read _PS_T_current and compare it with _PS_T_warn and _PS_T_max.
  2. Clean the heat sink and check the cabinet fans and filters.
  3. Check that the drive fan runs, if one is fitted.
  4. Check mounting clearances and cabinet temperature.

4101: Power stage overtemperature

Warning: act before it becomes a stop

What it means: Warning: the power stage is getting close to its temperature limit. If it keeps heating, error 4100 follows.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Ambient temperature in the cabinet too high
  • Dust on the heat sink
  • Drive fan failed (if fitted)

First checks, in this order

  1. Read _PS_T_current and _PS_T_warn.
  2. Improve cabinet cooling, clean the heat sink and check the fan.

4102: Power stage overload (I2t)

Warning: act before it becomes a stop

What it means: Warning: the drive current has been above its nominal value for too long.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Motion cycle too demanding for the drive rating
  • Mechanical load higher than expected

First checks, in this order

  1. Read _PS_load and _PS_overload_I2t.
  2. Check the drive rating and lengthen the cycle time or reduce acceleration.
  3. Check the mechanics for binding.

4200: Device overtemperature

Hits OEE: Availability

What it means: The inside of the drive is too hot, so the power stage was switched off.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Ambient temperature in the cabinet too high
  • Dust in the drive
  • Drive fan failed (if fitted)

First checks, in this order

  1. Read _DEV_T_current.
  2. Improve cabinet cooling and check the cabinet fans and filters.
  3. Check that the drive fan runs, if one is fitted.

4300: Motor overtemperature

Hits OEE: Availability

What it means: The motor temperature is above its limit, so the drive stopped the motor and switched off the power stage.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Ambient temperature too high
  • Duty cycle too high or motor overloaded
  • Motor mounted so its heat cannot flow into the machine (thermally isolated)

First checks, in this order

  1. Read _M_T_current and compare it with _M_T_max.
  2. Check that the motor flange is mounted on a surface that takes heat away.
  3. Reduce the duty cycle or the load, and provide ventilation.
  4. Let the motor cool down before a Fault Reset.

4301: Motor overtemperature

Warning: act before it becomes a stop

What it means: Warning: the motor is getting close to its temperature limit. If it keeps heating, error 4300 follows.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Ambient temperature too high
  • Duty cycle too high or motor overloaded
  • Motor thermally isolated by its mounting

First checks, in this order

  1. Read _M_T_current.
  2. Reduce the duty cycle or load and improve motor cooling.

4302: Motor overload (I2t)

Warning: act before it becomes a stop

What it means: Warning: the motor current has been above its nominal value for too long.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Mechanical load too high or binding
  • Motor too small for the motion cycle

First checks, in this order

  1. Read _M_load and _M_overload.
  2. Check that the axis moves freely and the load is as designed.
  3. Use a larger motor if needed.

2300: Power stage overcurrent

Hits OEE: Availability

What it means: The drive saw a current spike above the power stage limit, typically a short circuit on the motor side.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Short circuit in the motor cable or motor winding
  • Motor phases wired wrong or swapped
  • Damaged motor cable insulation

First checks, in this order

  1. Power off and wait for the DC bus to discharge before touching the wiring.
  2. Check the motor power connection and the phase order U, V, W.
  3. Disconnect the motor cable at the drive and check the motor and cable for short circuits.

7121: System error detected: Error in motor encoder communication

Hits OEE: Availability

What it means: The data link to the motor encoder was disturbed. The error memory holds the encoder's own error code.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Electrical noise on the encoder cable
  • Poor shield or ground connection
  • Faulty encoder cable or encoder

First checks, in this order

  1. Check the encoder cable, connectors and shield grounding.
  2. Read the additional information for this entry in the error memory.
  3. If it repeats, contact Schneider Electric.

1302: Safety-related function STO activated (STO_A, STO_B)

Warning: act before it becomes a stop

What it means: Warning: the STO inputs went low while the power stage was already off, so the drive cannot be enabled until they return.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Emergency stop or safety circuit open
  • STO wiring or 24 Vdc supply problem

First checks, in this order

  1. Close the safety circuit and check that STO_A and STO_B both see +24 Vdc.
  2. Check _IO_STO_act and the STO wiring at CN2.

5201: Error detected in motor encoder communication

Hits OEE: Availability

What it means: Communication with the motor encoder failed. This is a class 4 error, so it needs a power cycle.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Encoder cable not properly connected
  • Electrical noise on the encoder cable

First checks, in this order

  1. Check the encoder cable and connectors and the shield connection.
  2. Switch the drive off and on.
  3. If it persists, swap the cable or the motor.

5203: Error detected in connection motor encoder

Hits OEE: Availability

What it means: The drive found a fault on the motor encoder connection. This is a class 4 error, so it needs a power cycle.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Encoder cable unplugged, loose or damaged

First checks, in this order

  1. Check the encoder cable and connectors for damage and bent pins.
  2. Switch the drive off and on.

5204: Connection to motor encoder lost

Hits OEE: Availability

What it means: The motor encoder connection was lost while the drive was working.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Encoder cable loose or broken, often at a moving cable chain
  • Connector worked loose by vibration

First checks, in this order

  1. Check the encoder cable along its full length, especially in cable chains.
  2. Check the connectors at the drive and the motor.
  3. Do a Fault Reset after the connection is restored.

5202: Motor encoder is not supported

Hits OEE: Availability

What it means: The encoder found in the connected motor is not compatible with this drive.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Incompatible motor or encoder connected
  • Wrong motor fitted after a replacement

First checks, in this order

  1. Check the motor part number against the approved drive and motor combinations.
  2. Fit a supported motor, then switch the drive off and on.

5206: Communication error detected in encoder

Warning: act before it becomes a stop

What it means: Warning: the communication channel to the encoder is getting interference.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Electrical noise on the encoder cable
  • Poor shield or ground connection

First checks, in this order

  1. Check the EMC measures: cable shield, grounding and cable routing away from power cables.

5102: Motor encoder supply voltage

Hits OEE: Availability

What it means: The encoder supply from the drive is outside the allowed 8 V to 12 V range.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Short circuit in the encoder cable or encoder
  • Faulty encoder supply inside the drive

First checks, in this order

  1. Check the encoder cable for damage or a short circuit.
  2. If the cable and motor are good, replace the drive or contact Schneider Electric.

5600: Motor connection phase error detected

Hits OEE: Availability

What it means: One motor phase is missing.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Loose or broken motor phase wire
  • Motor connector not fully seated
  • Open motor winding

First checks, in this order

  1. Power off and wait for the DC bus to discharge.
  2. Check the motor cable and terminals U, V, W at both ends.
  3. Measure the motor winding resistance phase to phase.

5603: Commutation error detected

Hits OEE: Availability

What it means: The motor is not turning the way the drive expects for the current it applies, so the motor phase angle (commutation) is wrong.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Motor phases wired wrong
  • Encoder signals lost or disturbed
  • Load torque higher than the motor torque
  • Wrong encoder phase offset data or motor not adjusted

First checks, in this order

  1. Check the motor phase wiring and the encoder wiring.
  2. Improve EMC: grounding and shield connections.
  3. Check that the motor can hold the load torque.
  4. Check the motor data and contact Schneider Electric if it persists.

7343: Absolute position is different from incremental position

Warning: act before it becomes a stop

What it means: Warning version of 7344: the absolute and counted positions disagree. Treat it as an early sign of an encoder or cable problem.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Electrical noise on the encoder cable
  • Motor encoder starting to fail

First checks, in this order

  1. Check the encoder cable, connectors and shield grounding.
  2. Watch for error 7344 and plan an encoder or cable check.

7340: Reading of absolute position aborted

Hits OEE: Availability

What it means: The drive could not finish reading the absolute position from the motor encoder.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Interference on the encoder (Hiperface) communication
  • Faulty encoder in the motor

First checks, in this order

  1. Check the encoder cable and shield grounding.
  2. If it persists, contact Schneider Electric or replace the motor.

7321: Timeout reading the absolute position from the encoder

Hits OEE: Availability

What it means: The motor encoder did not answer in time when the drive asked for the absolute position.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Interference on the encoder (Hiperface) communication
  • Faulty encoder in the motor

First checks, in this order

  1. Check the encoder cable and shield grounding.
  2. If it persists, contact Schneider Electric or replace the motor.

733F: Amplitude of encoder analog signals too low

Hits OEE: Availability

What it means: The analog (sine and cosine) signals from the encoder are too weak.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Encoder not connected or wired wrong
  • Damaged encoder cable
  • Electrical noise or poor shield connection

First checks, in this order

  1. Check the encoder cable and connectors.
  2. Check the shield connection and cable routing.
  3. Switch the drive off and on; if it persists, contact Schneider Electric.

734E: Error in analog signals from encoder detected

Hits OEE: Availability

What it means: The drive found a fault in the analog encoder signals. The error memory holds a detail value (Internal_DeltaQuep).[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Encoder cable not properly connected
  • Electrical noise on the encoder signals
  • Mechanical problem at the motor or encoder

First checks, in this order

  1. Check the encoder cable, connectors and shield connection.
  2. Check the motor and coupling for mechanical damage.
  3. Switch the drive off and on; if it persists, contact Schneider Electric.

7328: Motor encoder: Position evaluation error detected

Hits OEE: Availability

What it means: The encoder itself reported that its position evaluation is wrong.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Faulty encoder in the motor

First checks, in this order

  1. Switch the drive off and on.
  2. If it repeats, contact Schneider Electric or replace the motor.

7330: System error detected: Motor encoder (Hiperface)

Hits OEE: Availability

What it means: The drive detected an internal error on the Hiperface motor encoder.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Interference on the encoder communication
  • Faulty encoder

First checks, in this order

  1. Check EMC measures: shield, grounding and cable routing.
  2. Switch the drive off and on; if it persists, contact Schneider Electric.

7327: Error bit set in Hiperface answer

Warning: act before it becomes a stop

What it means: Warning: the encoder flagged an error in its answer, usually from interference.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Electrical noise on the encoder cable
  • Poor shield connection

First checks, in this order

  1. Check the encoder cable shield and wiring.

7329: Motor encoder Warn signal

Warning: act before it becomes a stop

What it means: Warning: the motor encoder sent its warning signal.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Electrical noise on the encoder cable
  • Encoder starting to fail

First checks, in this order

  1. Check the encoder cable and shield.
  2. If it keeps coming back, contact Schneider Electric or plan a motor replacement.

7345: Amplitude of analog signals too high, limit of AD conversion exceeded

Warning: act before it becomes a stop

What it means: Warning: the analog encoder signals are stronger than the drive input can measure.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Electrical noise on the encoder signals
  • Faulty encoder

First checks, in this order

  1. Check the encoder cable shield and wiring.
  2. If it persists, contact Schneider Electric.

7341: Encoder overtemperature

Warning: act before it becomes a stop

What it means: Warning: the encoder in the motor is getting too hot, which normally means the motor is too hot.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Duty cycle too high
  • Motor thermally isolated by its mounting
  • Motor blocked and drawing high current
  • Ambient temperature too high

First checks, in this order

  1. Reduce the duty cycle, for example lower the acceleration.
  2. Add cooling, for example a fan, and mount the motor so heat flows into the machine.
  3. Check the axis for blocking.

7342: Encoder overtemperature

Hits OEE: Availability

What it means: The encoder in the motor is too hot, so the drive stopped the motor and switched off the power stage.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Duty cycle too high
  • Motor thermally isolated by its mounting
  • Motor blocked and drawing high current
  • Ambient temperature too high

First checks, in this order

  1. Let the motor cool down.
  2. Reduce the duty cycle and add cooling.
  3. Check the axis for blocking.
  4. Use a larger drive or motor if the cycle cannot change.

734C: Error detected with quasi absolute position

Hits OEE: Availability

What it means: With the quasi absolute function active, the motor shaft position at power up is outside the allowed deviation from where it was at power down.[1][2][3][4]

Drive response: Error class set by ErrorResp_QuasiAbs (3 or 4, factory setting 3: power stage off at once); class 3 clears with Fault Reset, class 4 needs a power cycle

Likely causes

  • Motor shaft moved while the drive was off
  • Drive powered down while the motor was still moving

First checks, in this order

  1. Only power down the drive with the motor at standstill.
  2. Keep the shaft from moving while the drive is off (holding brake, mechanics).
  3. Home the axis again before running.
  4. Check ErrorResp_QuasiAbs (error class 3 or 4, factory setting 3).

7100: System error detected: Invalid power stage data

Hits OEE: Availability

What it means: The power stage data stored in the drive failed its checksum.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Internal memory fault in the drive

First checks, in this order

  1. Switch the drive off and on.
  2. If it persists, contact Schneider Electric or replace the drive.

7120: Invalid motor data

Hits OEE: Availability

What it means: The motor data read from the motor failed its checksum.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Corrupt data in the motor encoder memory

First checks, in this order

  1. Switch the drive off and on.
  2. If it persists, contact Schneider Electric or replace the motor.

7122: Invalid motor data

Hits OEE: Availability

What it means: The drive found an error in the motor data stored in the motor encoder.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Corrupt data in the motor encoder memory
  • Internal memory fault

First checks, in this order

  1. Switch the drive off and on.
  2. If it persists, contact Schneider Electric or replace the motor.

7124: System error detected: Motor encoder inoperative

Hits OEE: Availability

What it means: The motor encoder is not working.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Faulty encoder in the motor
  • Encoder cable fault

First checks, in this order

  1. Check the encoder cable and connectors.
  2. Switch the drive off and on; if it persists, contact Schneider Electric or replace the motor.

712D: Electronic motor nameplate not found

Hits OEE: Availability

What it means: The drive could not read a valid electronic nameplate from the motor encoder.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Motor type without an electronic nameplate
  • Corrupt motor data in the encoder

First checks, in this order

  1. Check that the connected motor is an approved type with an electronic nameplate.
  2. If it is, contact Schneider Electric or replace the motor.

2301: Braking resistor overcurrent

Hits OEE: Availability

What it means: The drive saw too much current in the braking resistor circuit, typically a short circuit.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Short circuit in the external braking resistor or its wiring
  • External braking resistor value too low
  • Faulty internal braking resistor

First checks, in this order

  1. Power off and wait for the DC bus to discharge.
  2. Check the external braking resistor wiring and its resistance against the rating.
  3. If the internal braking resistor is used, contact Schneider Electric.

4402: Braking resistor overload (I2t > 75%)

Warning: act before it becomes a stop

What it means: Warning: the braking resistor has reached 75% of its allowed load.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Too much braking energy: fast decelerations, high speed or heavy loads
  • Braking resistor too small

First checks, in this order

  1. Read _RES_load.
  2. Reduce load, speed or deceleration.
  3. Check the braking resistor rating and the settings RESext_P and RESext_R.

4403: Braking resistor overload (I2t > 100%)

Warning: act before it becomes a stop

What it means: The braking resistor has reached its full allowed load. The reaction is set by ErrorResp_I2tRES.[1][2][3][4]

Drive response: Error class set by ErrorResp_I2tRES (0 to 2, factory setting 0: warning, movement continues); clear with Fault Reset

Likely causes

  • Too much braking energy: fast decelerations, high speed or heavy loads
  • Braking resistor too small

First checks, in this order

  1. Read _RES_load and _RES_overload.
  2. Reduce load, speed or deceleration.
  3. Check the braking resistor rating and the settings RESext_P, RESext_R and RESext_ton.
  4. Check ErrorResp_I2tRES (error class 0 to 2, factory setting 0).

4404: Overload of transistor for braking resistor

Warning: act before it becomes a stop

What it means: Warning: the braking transistor inside the drive is overloaded.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Too much braking energy
  • Deceleration too fast for the load

First checks, in this order

  1. Reduce the load or the deceleration.

7110: System error detected: Internal braking resistor

Hits OEE: Availability

What it means: The internal braking resistor is not working or not connected.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Faulty internal braking resistor

First checks, in this order

  1. Check whether the internal or an external braking resistor is selected in RESint_ext.
  2. Contact Schneider Electric.

7112: No external braking resistor connected

Hits OEE: Availability

What it means: An external braking resistor is selected in RESint_ext, but the drive cannot detect one.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • External braking resistor not wired or wire broken
  • Wrong resistance value
  • RESint_ext set to external by mistake

First checks, in this order

  1. Check the external braking resistor wiring and measure its resistance.
  2. Check RESint_ext.

1A01: Motor has been changed (different type of motor)

Hits OEE: Availability

What it means: The drive detected a different motor type from the one it knew before. The HMI shows mot.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Motor replaced with a different type
  • Wrong motor connected to this drive

First checks, in this order

  1. Check that the new motor is the intended type.
  2. Confirm the change on the HMI: press the navigation button when mot shows, then again to save.
  3. After a motor change, check the encoder settings.

110D: Basic configuration of drive required after factory setting

Hits OEE: Availability

What it means: The First Setup (FSU) was not run or not finished, typically after a new drive or a factory reset. The HMI shows fsu.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • New drive, or factory settings restored
  • First Setup interrupted

First checks, in this order

  1. Run the First Setup from the HMI or the commissioning software.
  2. Load the saved parameter file or memory card for this machine if one exists.

110B: Configuration error detected

Hits OEE: Availability

What it means: A parameter check failed during start-up. The error memory gives the Modbus register address of the parameter at fault.[1][2][3][4]

Drive response: Error class 3: power stage switched off at once, without stopping the movement first; clear with Fault Reset

Likely causes

  • Parameter values that conflict, for example a Profile Position velocity above the drive maximum
  • Parameter file from another machine or firmware

First checks, in this order

  1. Read the additional information in the error memory to find the parameter.
  2. Correct that parameter and power cycle the drive.

1314: At least two inputs have the same signal input function

Hits OEE: Availability

What it means: The same signal input function is assigned to two or more digital inputs.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • Input mapping changed by hand or by a parameter file

First checks, in this order

  1. Check the digital input functions (IOfunct_DI0 and following) and reassign them.
  2. Switch the drive off and on to clear this class 4 error.

1310: Frequency of the external reference value signal too high

Hits OEE: Availability

What it means: The pulse reference (A/B, pulse/direction or CW/CCW) is arriving faster than the input allows.[1][2][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Controller sending pulses too fast
  • Gear ratio in Electronic Gear mode not matched to the application

First checks, in this order

  1. Check the pulse frequency from the controller.
  2. Check the gear ratio in the Electronic Gear operating mode.

610E: System error detected: 24 VDC below undervoltage threshold for shutdown

Hits OEE: Availability

What it means: The 24 Vdc control supply dropped below the shutdown level.[1][2][3][4]

Drive response: Error class 4: power stage switched off at once, without stopping the movement first; clear only by switching the drive off and on

Likely causes

  • 24 Vdc power supply overloaded or failing
  • Loose 24 Vdc wiring
  • Voltage drop on long 24 Vdc lines

First checks, in this order

  1. Measure the 24 Vdc supply at the drive while the machine runs.
  2. Check the 24 Vdc wiring and the power supply rating.
  3. Switch the drive off and on to clear this class 4 error.

1503: Quick Stop triggered via fieldbus

Hits OEE: Availability

What it means: The controller sent a Quick Stop over the fieldbus with an option code that puts the drive into Fault instead of Quick Stop Active.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Quick Stop command from the PLC or motion controller

First checks, in this order

  1. Check why the controller sent the Quick Stop.
  2. Do a Fault Reset from the controller.

A300: Deceleration after HALT request still running

Warning: act before it becomes a stop

What it means: Warning: a new command came in, or HALT was removed, before the motor finished stopping after a HALT.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • HALT removed too soon
  • New command sent before the motor reached standstill

First checks, in this order

  1. Wait for the motor to reach standstill before removing HALT or sending the next command.

A301: Drive in operating state Quick Stop Active

Warning: act before it becomes a stop

What it means: Warning: the drive is in Quick Stop Active because an error of class 1 was detected.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • An error of class 1, for example a limit switch stop

First checks, in this order

  1. Read _LastError to find the class 1 error behind it, fix it, then do a Fault Reset.

A304: Stop by reference switch

Hits OEE: Availability

What it means: The drive stopped because the reference switch signal became active.[1][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Reference switch actuated outside a homing move
  • Faulty reference switch or wiring
  • Wrong switch type in IOsigREF

First checks, in this order

  1. Check the reference switch, its wiring and its 24 Vdc supply.
  2. Check IOsigREF and which input has the reference switch function.
  3. Do a Fault Reset.

A306: Stop by user-initiated software stop

Hits OEE: Availability

What it means: The drive is in Quick Stop Active because a software stop was requested, so a new operating mode cannot start.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Stop command from the controller or commissioning software

First checks, in this order

  1. Do a Fault Reset to clear the stop condition.

A308: Drive is in operating state Fault or Fault Reaction Active

Warning: act before it becomes a stop

What it means: Warning: a command was rejected because the drive is already in Fault after an error of class 2 or higher.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • An earlier error of class 2, 3 or 4

First checks, in this order

  1. Read _LastError, remove its cause and do a Fault Reset.

A31E: Stop by positive software limit switch

Hits OEE: Availability

What it means: The command cannot run because the positive software limit position was reached.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Target position beyond the positive software limit
  • Axis zero point shifted or homing wrong

First checks, in this order

  1. Move the axis back into the allowed range.
  2. Check MON_SW_Limits and MON_swLimP, and check the homing.

A31F: Stop by negative software limit switch

Hits OEE: Availability

What it means: The command cannot run because the negative software limit position was reached.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Target position beyond the negative software limit
  • Axis zero point shifted or homing wrong

First checks, in this order

  1. Move the axis back into the allowed range.
  2. Check MON_SW_Limits and MON_swLimN, and check the homing.

A31D: Velocity range exceeded (parameter CTRL_v_max, M_n_max)

Warning: act before it becomes a stop

What it means: Warning: a velocity was set above the allowed maximum, which is the lower of CTRL_v_max and M_n_max.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Velocity command above the drive or motor limit

First checks, in this order

  1. Lower the commanded velocity.
  2. If M_n_max is above CTRL_v_max, CTRL_v_max can be raised up to the motor limit.

A313: Position overflow, zero point is therefore no longer valid (ref_ok=0)

Warning: act before it becomes a stop

What it means: Warning: the axis moved beyond the position range, so the zero point is lost and absolute moves are blocked.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Axis moved past the position range limits

First checks, in this order

  1. Run the Homing operating mode to set a valid zero point.

A324: Error detected during homing

Hits OEE: Availability

What it means: Homing stopped because of an error. The error memory gives the detailed sub-code (A325, A326, A327, A328 or A329).[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Limit or reference switch problem during the homing move

First checks, in this order

  1. Read the additional information in the error memory and look up that sub-code.

A325: Limit switch to be approached not enabled

Hits OEE: Availability

What it means: Homing to a limit switch was started, but that limit switch is disabled.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • IOsigLIMP or IOsigLIMN set to inactive

First checks, in this order

  1. Enable the limit switch with IOsigLIMP or IOsigLIMN, or choose another homing method.

A326: Reference switch not found between positive limit switch and negative limit switch

Hits OEE: Availability

What it means: The homing move ran between both limit switches without seeing the reference switch.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Reference switch faulty or not connected
  • Reference switch out of position

First checks, in this order

  1. Check the function and wiring of the reference switch.
  2. Check IOsigREF and the input assignment.

A329: More than one signal positive limit switch/negative limit switch/reference switch active

Hits OEE: Availability

What it means: During homing, more than one of the limit and reference switch signals was active at once.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Switch wired wrong
  • Supply voltage for the switches too low

First checks, in this order

  1. Check the switch wiring and the 24 Vdc supply to the switches.

A32D: Positive limit switch error detected (switch signal briefly enabled or switch overtraveled)

Hits OEE: Availability

What it means: The positive limit switch signal blinked on briefly, or the axis overtravelled the switch.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Noise on the switch signal
  • Motor shaking or bouncing after stopping on the switch

First checks, in this order

  1. Check the switch supply voltage, cabling and function.
  2. Check how the motor behaves after stopping and optimize the control loop settings.

A32E: Negative limit switch error detected (switch signal briefly enabled or switch overtraveled)

Hits OEE: Availability

What it means: The negative limit switch signal blinked on briefly, or the axis overtravelled the switch.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Noise on the switch signal
  • Motor shaking or bouncing after stopping on the switch

First checks, in this order

  1. Check the switch supply voltage, cabling and function.
  2. Check how the motor behaves after stopping and optimize the control loop settings.

A32F: Index pulse not found

Hits OEE: Availability

What it means: Homing to the encoder index pulse failed because the pulse was not seen.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Index pulse signal not connected or not working

First checks, in this order

  1. Check the index pulse signal and its connection.

A334: Timeout Standstill Window monitoring

Hits OEE: Availability

What it means: After a move, the axis did not settle inside the standstill window in time.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • External load pushing the axis
  • Control loop not tuned
  • Standstill window set too tight

First checks, in this order

  1. Check the load on the axis.
  2. Check MON_p_win, MON_p_winTime and MON_p_winTout.
  3. Optimize the control loop settings.

A347: Permissible position deviation exceeded

Warning: act before it becomes a stop

What it means: Warning: the following error passed the warning threshold. If it keeps growing, error A320 follows.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Load or acceleration too high
  • Mechanical binding

First checks, in this order

  1. Reduce the load or acceleration and check the mechanics.
  2. The warning threshold is MON_p_dif_warn (percent of MON_p_dif_load_usr).

A35D: Permissible velocity deviation exceeded

Hits OEE: Availability

What it means: The actual velocity differs too much from the commanded velocity because of load.[1][2][3][4]

Drive response: Error class set by ErrorResp_v_dif (1 to 3, factory setting 3: power stage off at once); clear with Fault Reset

Likely causes

  • Load or acceleration too high
  • Mechanical binding

First checks, in this order

  1. Reduce the load or acceleration and check the mechanics.
  2. Check MON_VelDiff and MON_VelDiff_Time.
  3. Check ErrorResp_v_dif (error class 1 to 3, factory setting 3).

A06B: Position deviation in operating mode Electronic Gear too high

Hits OEE: Availability

What it means: In Electronic Gear mode the axis fell too far behind the master position.[1][2][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Velocity limitation active
  • Direction of movement not released
  • Master pulses too fast for the axis

First checks, in this order

  1. Check the velocity of the external reference values and the velocity limitation.
  2. Check the release of direction.

1617: Autotuning: Friction torque or load torque too great

Hits OEE: Availability

What it means: Autotuning stopped because the current limit (CTRL_I_max) was reached.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Axis hard to move: friction, binding or brake applied
  • Load too heavy for the drive

First checks, in this order

  1. Check that the axis moves easily by hand with power off.
  2. Check the load.
  3. Use a larger drive if needed.

1620: Autotuning: Load torque too high

Hits OEE: Availability

What it means: Autotuning found that the machine load or inertia is too high for this drive and motor.[1][2][3][4]

Drive response: Error class 1: Quick Stop, drive goes to Quick Stop Active with the power stage still on; clear with Fault Reset

Likely causes

  • Drive and motor too small for the machine
  • Load inertia much higher than the motor inertia

First checks, in this order

  1. Reduce the load and check the sizing of the drive and motor.

5452: System error detected: Data on memory card and device do not match

Hits OEE: Availability

What it means: The data on the inserted memory card does not fit this drive. The HMI may show Card.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Card from a different device type or power stage
  • Card data does not match the drive firmware version

First checks, in this order

  1. Check that the memory card belongs to this drive type and firmware.
  2. Copy the correct data to the card, or remove the card.

B201: RS485/Modbus: Interruption of the connection

Hits OEE: Availability

What it means: Modbus connection monitoring saw the link drop, so the drive stopped the motor.[1][2][3][4]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Modbus cable unplugged or damaged
  • Master device switched off or stopped polling

First checks, in this order

  1. Check all cables and connectors used for the data exchange.
  2. Check that the master device is on and communicating.

B202: RS485/Modbus: Interruption of the connection

Warning: act before it becomes a stop

What it means: Warning: Modbus connection monitoring saw the link drop.[1][2][3][4]

Drive response: Error class 0 (warning): movement continues; clear with Fault Reset once the cause is gone

Likely causes

  • Modbus cable unplugged or damaged
  • Master device switched off or stopped polling

First checks, in this order

  1. Check all cables and connectors used for the data exchange.
  2. Check that the master device is on.

8130: CANopen: Detected Heartbeat or Life Guard error

Hits OEE: Availability

What it means: The CANopen master did not show up within the heartbeat or node guarding time. The reaction is set by ErrResp_HeartB_LifeG.[1][3]

Drive response: Error class set by ErrResp_HeartB_LifeG (1 to 3, factory setting 2: Quick Stop, then power stage off); clear with Fault Reset

Likely causes

  • Master bus cycle slower than the programmed heartbeat or node guarding time
  • CAN cable or connector fault
  • Master stopped

First checks, in this order

  1. Check the CANopen configuration and increase the heartbeat or node guarding time.
  2. Check the CAN cabling and termination.
  3. Check ErrResp_HeartB_LifeG (error class 1 to 3, factory setting 2).

8141: CANopen: CAN controller is in state 'bus-off'

Hits OEE: Availability

What it means: The drive's CAN controller went bus-off after too many error frames.[1][3]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Devices on the bus with different baud rates
  • Wiring, termination or shield fault on the CAN bus

First checks, in this order

  1. Check that all devices use the same baud rate.
  2. Check the CAN bus wiring, termination resistors and shield.

B610: EtherCAT: Fieldbus watchdog

Hits OEE: Availability

What it means: EtherCAT frames were lost, so the fieldbus watchdog tripped. The error memory gives the detailed code.[1]

Drive response: Error class 2: Quick Stop, then the power stage is switched off at standstill; clear with Fault Reset

Likely causes

  • Damaged EtherCAT cable or connector
  • Problem on the EtherCAT master

First checks, in this order

  1. Check the cabling and shield connection.
  2. Check the diagnostic information of the EtherCAT master.

Log it, or the same alarm comes back

An error stops the servo and the axis with it, so in OEE terms it is a breakdown. A warning lets the axis keep running, but its cause often becomes an error later in the shift. Log errors with the minutes lost and warnings as early signs.

  • Reason code: the code plus the axis, for example LXM32 A320, labeller web axis, so a position deviation that trips on the same reel change shows up as a pattern.
  • Loss bucket: a stop that needs a reset, a part or a technician is an availability loss (breakdown). Stops shorter than your micro-stop threshold go to performance (minor stops). The six big losses page shows where each one belongs.
  • What to count: how often each code fires per week and the minutes it costs. Two numbers a week turn "that alarm comes up sometimes" into a ranked list. The MTBF and MTTR calculator and the downtime cost calculator do the math.

The free OEE tracker logs each stop with its reason and turns the week into a downtime Pareto, so the code that costs the most rises to the top.

For Schneider Altivar drives, fabrico.io has the Altivar fault codes guide. An error code tells you what the servo drive detected, not what happened at the machine in the seconds before. Fabrico's camera-based OEE software syncs camera video with machine data, so you can replay the moment the axis stopped next to the error.

Frequently asked questions

What does error 1300 mean on a Lexium 32?

1300 is Safety-related function STO activated (STO_A, STO_B). The STO safety inputs went low while the drive was enabled, so it switched off the power stage. It is error class 3. Usually an emergency stop, guard door or safety relay opened the circuit, or a STO wire or the 24 Vdc supply failed. Close the safety circuit, check that STO_A and STO_B both have +24 Vdc (parameter _IO_STO_act shows their state), then do a Fault Reset. If the two inputs disagree for more than 1 second the drive shows 1301 instead, which needs a power cycle. If STO is not used, both inputs must be wired to +24 Vdc.

How do I reset a fault on a Lexium 32?

First remove the cause. Then press the navigation button on the integrated HMI (the display shows FrES) and press it again, or give a rising edge on the input assigned to Fault Reset (DI1 by factory setting in local control mode), or send Fault Reset from the PLC over the fieldbus. Errors of class 4, such as 1301 or 5200, only clear by switching the drive off and on. After a class 2 or 3 error the drive goes back to Switch On Disabled and must be enabled again.

What does A302 mean on a Lexium 32?

A302 is Stop by positive limit switch (error class 1). The positive limit switch input tripped, so the drive made a Quick Stop. Check whether the axis really overtravelled, then check the switch, its wiring and IOsigLIMP (inactive, normally closed or normally open). After a Fault Reset the drive only allows movement in the negative direction until the axis is off the switch. A303 is the same for the negative limit switch. A following error (position deviation) is a different code: A320.

What are the Lexium 32 error classes?

Every error code has a class from 0 to 4. Class 0 is a warning and the movement continues. Class 1 makes a Quick Stop and keeps the power stage on (Quick Stop Active). Class 2 makes a Quick Stop and then switches the power stage off at standstill. Class 3 switches the power stage off at once, without stopping the movement first. Class 4 does the same and can only be cleared by a power cycle; classes 0 to 3 clear with Fault Reset. A few codes, such as A320 following error or 3100 missing mains phase, have an adjustable class set by an ErrorResp parameter.

What does error 7344 mean on a Lexium 32?

7344 is Absolute position is different from incremental position (error class 3). The drive compares the absolute position from the motor encoder with the position it counts from the encoder sine and cosine signals, and they no longer match. Common causes are noise on the feedback cable, a damaged or self-made cable, bent pins in the motor connector, poor grounding or a faulty encoder. Check the cable and pins, use original Schneider Electric cables, ground the cable shields and the motor (through its flange or with a ground conductor of at least 10 mm2), and swap in a known-good motor and cable to find the bad part. 7343 is the warning version of the same check.

Sources

Codes and meanings follow the manufacturer documentation below. Wording is ours, simplified for the shop floor; the manual for your exact model and software version wins if it differs.

  1. Lexium 32M Servo Drive User Guide (LXM32M product manual), Schneider Electric document 0198441113767, version 14 (0198441113767.14), 07/2022, hosted by Schneider Electric
  2. Lexium 32C Servo Drive User Guide (LXM32C product manual), Schneider Electric document 0198441113761, version 12 (0198441113761.12), 12/2021, hosted by Schneider Electric
  3. Lexium 32A Servo Drive User Guide (LXM32A product manual), Schneider Electric document 0198441113755, version 12 (0198441113755.12), 12/2021, hosted by Schneider Electric
  4. Lexium 32S Servo Drive User Guide (LXM32S product manual), Schneider Electric document 0198441114060, version 03 (0198441114060.03), 12/2021, hosted by Schneider Electric
  5. Schneider Electric FAQ FA295485: What are errors E1300 and E1301 on the LXM32 drive?, published 23/08/2016, last modified 28/08/2025
  6. Schneider Electric FAQ FA369813: E7344 error on LXM32 drive, published 2/19/2019, last modified 9/19/2023

See the moment the axis stopped

Fabrico, a light MES with computer vision, syncs camera footage with machine and timeline data, so you can replay the exact moment the axis stopped and review the cause next to its error. Cameras also catch short stops and a line that is switched on but not producing, the losses nobody writes down. Machines connect through a PLC, a Fabrico IoT device or an AI camera.

Book a Fabrico demo
The lookup stays free.

Related: Kollmorgen AKD fault codes · Rexroth IndraDrive errors · SINAMICS V90 codes · servo drive troubleshooting · servo motor

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Related tools: full troubleshooting directory · OEE calculator · downtime cost · MTBF / MTTR · glossary

OEE essentials: OEE calculator · What is OEE · How to improve OEE · Six big losses · Availability · TEEP · Cost of downtime · OEE benchmark · Free OEE tracker · Free OEE software · How to track downtime · How to implement OEE · Light MES vs full MES