Allen Bradley Kinetix 2000 Drive Fault Codes List

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Complete guide to Allen Bradley Kinetix 2000 fault codes. Troubleshoot E-codes on IAM/AM modules, Sercos ring faults (E38), and Axis errors using Studio 5000.

Kinetix 2000 Fault Codes Reference Table

Below is the complete list of error codes. These codes flash on the 7-segment LED display of the specific IAM or AM module that is faulted. The display typically cycles through “E” followed by the 2-digit code (e.g., E…3…8). 

Kinetix 2000 Fault Codes Reference Table

Kinetix 2000 Fault Codes Reference Table

Fault Code and Meaning Cause and Remedy
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Power (PWR) indicator not ON		 Cause:
No AC power or auxiliary logic power, or internal power supply malfunction.

Remedy:
  • Verify AC control power is applied to the Kinetix 2000 system.
  • Call your Rockwell Automation sales representative to return module for repair.
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Motor jumps when first enabled		 Cause:
Motor wiring error, incorrect motor chosen, or digital I/O not working correctly (I/O power disconnected).

Remedy:
  • Check motor wiring.
  • Run Hookup test in RSLogix 5000 software.
  • Verify the proper motor is selected.
  • Verify connections and I/O power source.
E00

BusUndervoltage Fault
(Blown fuse)		 Cause:
A blown fuse was detected on the inverter PCB.

Remedy:
  • Call your Rockwell Automation sales representative to return module for repair.
E04

MotorOvertemp Fault		 Cause:
Motor thermal switch tripped due to high ambient motor temperature, excessive current, motor wiring error, or incorrect motor selection.

Remedy:
  • Operate within (not above) the continuous torque rating for the ambient temperature 40 °C (104 °F) maximum.
  • Lower ambient temperature, increase motor cooling.
  • Check motor wiring at MF connector on the IAM/AM.
  • Verify the proper motor has been selected.
E05

DriveOvercurrent Fault
(Power Fault)		 Cause:
Self-protection of the Intelligent Power Module (IPM) due to:
- Motor cables shorted.
- Motor winding shorted internally.
- Drive temperature too high.
- Operation above continuous power rating.
- Short circuit/failed component.

Remedy:
  • Verify continuity of motor power cable and connector.
  • Disconnect motor power cables; if motor is difficult to turn by hand, replace it.
  • Check for clogged vents or defective fan. Ensure cooling is not restricted.
  • Verify ambient temperature is not too high.
  • Operate within continuous power rating and reduce acceleration rates.
  • Remove all power/motor connections and perform continuity check on DC bus to U, V, W outputs.
E06

HardOvertravel Fault		 Cause:
Axis moved beyond physical travel limits (positive/negative) or dedicated overtravel input is inactive.

Remedy:
  • Check wiring.
  • Verify motion profile.
  • Verify axis configuration in software.
E07

MotFeedbackFault
(Motor Feedback Loss)		 Cause:
The feedback wiring is open, shorted, or missing.

Remedy:
  • Check motor encoder wiring.
  • Run Hookup test in RSLogix 5000 software.
E09

BusUndervoltage Fault		 Cause:
DC bus voltage is below its limit (below 137V for 230V system) or fell below limit while an axis on the follower power rail was enabled.

Remedy:
  • Verify voltage level of the incoming AC power.
  • Check AC power source for glitches or line drop.
  • Install an uninterruptible power supply (UPS) on your AC input.
  • Disable follower axis before removing power.
E10

DriveOvervoltage Fault		 Cause:
The DC bus voltage is above its limit (over 410V for 230V system). Excessive regeneration of power.

Remedy:
  • Change the deceleration or motion profile.
  • Use a larger system (motor and Kinetix 2000 drive).
  • Install shunt module.
  • Verify input is within specifications.
E11

MotFeedbackFault
(Illegal Hall State)		 Cause:
State of Hall feedback inputs is incorrect due to bad connections.

Remedy:
  • Verify the Hall wiring at the MF connector on the IAM/AM.
  • Verify 5V power supply to the encoder.
E16

Softovertravel Fault		 Cause:
Axis position exceeded maximum software setting.

Remedy:
  • Verify motion profile.
  • Verify overtravel settings are appropriate.
E18

OverSpeedFault		 Cause:
Motor speed has exceeded 150% of maximum rated speed.

Remedy:
  • Check cables for noise.
  • Check tuning.
E19

PositionErrorFault
(Follow Error)		 Cause:
Position error limit was exceeded.

Remedy:
  • Increase the feed forward gain.
  • Increase following error limit or time.
  • Check position loop tuning.
  • Verify sizing of system.
  • Verify mechanical integrity of system within specification limits.
E20

MotFeedbackFault
(Mtr Fdbk AQB)		 Cause:
Motor Encoder State Error; the motor encoder encountered an illegal transition.

Remedy:
  • Use shielded cables with twisted pair wires.
  • Route the feedback away from potential noise sources.
  • Check the system grounds.
  • Replace the motor/encoder.
E21

AuxFeedbackFault		 Cause:
Communication was not established with an intelligent encoder.

Remedy:
  • Verify auxiliary encoder wiring.
E30

MotFeedbackFault		 Cause:
Communication was not established with an intelligent encoder.

Remedy:
  • Verify motor selection.
  • Verify the motor supports automatic identification.
  • Verify motor encoder wiring.
E34

GroundShortFault		 Cause:
Excessive ground current detected due to:
- Wiring error.
- Motor internal ground short.
- Internal malfunction.
- Grounded control power terminal (230V systems).

Remedy:
  • Check motor and input power wiring.
  • Replace motor.
  • Disconnect motor power cable from drive and enable drive with current limit set to 0. If fault clears, wiring or motor is the issue. If fault remains, call sales rep.
  • Remove ground from control power input / add isolation transformer.
E35

DriveUndervoltage Fault
(Pre-charge Fault)		 Cause:
Converter pre-charge cycle failed due to low AC input voltage or internal malfunction.

Remedy:
  • Check input AC voltage on all phases.
  • Call your sales representative.
E36

DriveOvertemp Fault		 Cause:
Converter thermal switch tripped; excessive heat exists in the power circuitry.

Remedy:
  • Reduce acceleration rates.
  • Reduce duty cycle (ON/OFF) of commanded motion.
  • Increase time permitted for motion.
  • Use larger Kinetix 2000 converter.
  • Check for clogged vents or defective fan.
E37

PowerPhaseLoss Fault		 Cause:
One or more phases of input AC power missing, or axis enabled when main power removed.

Remedy:
  • Check input AC voltage on all phases.
  • Disable axis before removing power.
E38

SERCOSFault
(Ring Flt)		 Cause:
Cable disconnected; SERCOS ring not active after being active.

Remedy:
  • Check that fiber-optic cable is present and connected properly.
E39

DriveHardFault
(Self Sense Flt)		 Cause:
Self-sensing Commutation Startup Error; motion required was obstructed.

Remedy:
  • Verify there are no impediments to motion at startup (hard limits).
  • Increase self-sensing current if high friction/load exists.
  • Check motor or encoder wiring using wiring diagnostics.
E43

DriveEnableInput Fault		 Cause:
Missing Drive Enable Input Signal. Attempt to enable axis via software while hardware input was inactive, or input transitioned to inactive while enabled.

Remedy:
  • Disable the Drive Enable Input fault.
  • Verify that Drive Enable hardware input is active whenever the drive is enabled through software.
E50

SERCOSFault
(Same ADDR)		 Cause:
Duplicate node address detected on SERCOS ring.

Remedy:
  • Verify that each SERCOS drive is assigned a unique node address.
E54

DriveHardFault
(Ifbk HW Fault)		 Cause:
Current feedback hardware fault detected.

Remedy:
  • Replace the module.
E60

DriveHardFault
(Unknown Axis)		 Cause:
Illegal ID bits detected.

Remedy:
  • Replace the module.
E61

AuxFeedbackFault
(Aux Fdbk AQB)		 Cause:
Auxiliary Encoder State Error; illegal transition encountered.

Remedy:
  • Use shielded cables with twisted pair wires.
  • Route the feedback away from potential noise sources.
  • Check the system grounds.
  • Replace the motor/encoder.
E62

AuxFeedbackFault
(Aux Fdbk Loss)		 Cause:
The feedback wiring is open, shorted, or missing.

Remedy:
  • Check the motor feedback cable connectors/wiring to the IAM/AM and motor.
E63

AuxFeedbackNoise		 Cause:
Noise on auxiliary feedback cable. Recommended grounding instructions not followed.

Remedy:
  • Verify grounding.
  • Route feedback cable away from noise sources.
E64

MotorFeedbackNoise		 Cause:
Noise on motor feedback cable.

Remedy:
  • Refer to System Design for Control of Electrical Noise Reference Manual, publication GMC-RM001.
E65

No Fault Message
(Hookup Fault)		 Cause:
Hookup procedure failed due to motor or feedback device malfunction.

Remedy:
  • Check motor power/feedback wiring.
  • Refer to on-screen message for resolution.
E66

No Fault Message
(Atune Flt)		 Cause:
Autotune procedure failed due to motor or feedback device malfunction.

Remedy:
  • Check motor power/feedback wiring.
  • Refer to on-screen message for resolution.
  • Perform Hookup in RSLogix 5000 software.
  • Consult RSLogix 5000 help screen.
E67
DriveHardFault (Task init)

Operating system failed		 Cause: Software initialization fault detected due to hardware failure.

Remedy:
  • Cycle power.
  • If fault persists, replace module.
E68
DriveHardFault (SCANport Comm)

DPI communication failed		 Cause: The DPI device or cable is faulty.

Remedy:
  • Check DPI connections.
E69
DriveHardFault (Objects Init)

Non-volatile memory is corrupt due to control board hardware failure.		 Cause: Control board hardware failure.

Remedy:
  • Load default parameters, save to non-volatile memory, and recycle power or reset the drive.
E70
DriveHardFault (NV Mem Init)

Non-volatile memory is corrupt due to control board software error.		 Cause: Control board software error.

Remedy:
  • Load default parameters, save to non-volatile memory, and recycle power or reset the drive.
E71
DriveHardFault (Memory Init)

RAM or Flash memory validation failure		 Cause: Validation failure during initialization.

Remedy:
  • Cycle power.
  • If fault persists, replace module.
E72
DriveOvertemp Fault (Drive Overtemp)

Inverter thermal switch tripped		 Cause:
  • The fan on the IAM or an AM failed.
  • The cabinet ambient temperature is above rating.
  • The machine duty cycle requires an RMS current exceeding the continuous rating of the controller.
  • The airflow access to the Kinetix 2000 system is limited or blocked.

Remedy:
  • Replace the failed module.
  • Check the cabinet temperature.
  • Change the command profile to reduce speed or increase time.
  • Check airflow and re-route cables away from the Kinetix 2000 system.
E73
Communicate (Backplane Comm)

Power rail CAN communications failed		 Cause:
  • Power rail connection shorted or open.
  • Module not mounted properly.

Remedy:
  • Check module for proper mount.
  • Check power rail and module for foreign objects.
E74
DriveOvercurrent Fault (Bus OverCurrent)

DC link current exceeds rating		 Cause:
  • Motor or transmission malfunction.
  • IAM not properly sized.

Remedy:
  • Check for proper motor sizing.
  • Check/replace transmission device.
  • Check/replace motor.
  • Check for proper IAM sizing.
  • Install larger kW rated IAM.
E75
DriveOvervoltage Fault (Shunt Time Out)

The IAM, AM, or SM has exceeded its shunt resistor continuous rating		 Cause: Exceeded shunt resistor continuous rating.

Remedy:
  • Use a properly sized shunt or modify duty cycle of the application.
  • System uses internal shunt and requires external shunt for additional capacity.
E76
DriveHardFault (CAN Init)

DPI hardware initialization fault detected		 Cause: Control board hardware failure.

Remedy:
  • Reset System.
  • If fault persists, replace system module.
E78
DriveHardFault (SERCOS Init)

Control hardware fault detected		 Cause: Control hardware fault detected.

Remedy:
  • Cycle power.
  • If fault persists, replace module.
E79
DriveOvervoltage Fault (Shunt Module Flt)

Shunt module fault		 Cause:
  • Shunt module temperature fault LED indicator is steady red.
  • Shunt module shunt fault LED indicator is steady red.
  • Module missing from power rail.

Remedy:
  • Refer to Temperature Fault LED Indicator (page 141).
  • Refer to Shunt Fault LED Indicator (page 141).
  • Install missing module on power rail.
  • Fill empty slot with slot filler module.
E80
DriveHardFault (CPLD Flt)

Control hardware fault detected		 Cause: Control hardware fault.

Remedy:
  • Replace module.
E81
DriveHardFault (Common Bus Flt)

Follower IAM detected ac input power being applied		 Cause: Follower IAM detected AC input power.

Remedy:
  • Remove ac input power connections from follower IAM.
E90
DriveHardFault (Pre-charge Timeout Flt)

Pre-charge resistor power exceeds the resistor rating		 Cause: Pre-charge resistor power exceeds the resistor rating.

Remedy:
  • Allow resistor to cool.
All others
RESERVED		 Cause: Unknown / Reserved error.

Remedy:
  • Call your local Rockwell Automation sales representative.

How to Read Kinetix 2000 Faults

Diagnostics on the Kinetix 2000 involve a combination of hardware inspection and software analysis. Here is the standard procedure for 2026:

  • The 7-Segment Display: Each module (IAM and AM) has its own display.
    • Status: A scrolling “4” indicates the drive is enabled and running. A flashing “0” indicates standby/stopped.
    • Faults: A flashing “E” followed by numbers indicates a fault. If the IAM has the fault, the entire rail may stop. If an AM has the fault, only that axis (and potentially the IAM) will stop.
  • Sercos Diagnostics (Studio 5000):
    • Go to the Motion Group or the specific Axis in the controller organizer.
    • Right-click the Axis and select Properties > Faults.
    • If you see “Sercos Ring Fault,” check the 1756-MxxSE or 1768-M04SE module status to see which node (drive) broke the fiber optic ring.
  • LED Status Indicators:
    • COMM LED (Green/Red): Indicates the status of the Sercos fiber ring. Flashing red suggests a break or loose cable.
    • BUS LED: Indicates the DC Bus status. Flashing Green is normal (Pre-charge); Solid Green is Bus Up.

Frequently Asked Questions (FAQ)

Q: How do I reset a Kinetix 2000 fault?

A: Most faults are reset via the PLC logic:

  • Use the Motion Axis Fault Reset (MAFR) instruction in Studio 5000, targeting the specific axis.
  • For “Hard Faults” (like E38 or E80), you may need to cycle the 24V Control Power to the IAM module.
  • Note: Pressing buttons on the drive itself does not reset Sercos faults.

Q: What does “E38 Sercos Ring Fault” mean?

A: This is the most common communication error. It means the fiber optic light signal was lost.

  • Check the Tx and Rx fiber cables for tight bends or breaks.
  • Ensure the “Transmitter Power” (High/Low) switch on the drive matches the cable length (Set to “Low” for short patch cables in the cabinet).
  • Verify the Node Address rotary switches match the configuration in the Logix project.

Q: Why is the drive showing “E90 Pre-charge Timeout”?

A: This indicates the DC Bus failed to charge up within the expected time.

  • This often happens if you have too many Axis Modules (AM) connected to a single IAM, exceeding the capacitance limit.
  • It can also indicate a failed internal resistor in the IAM module or a drop in the incoming AC voltage.

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