A Kinetix 6000 (Bulletin 2094) drive reports faults on the seven-segment status indicator on the front of each IAM and AM module: it shows an E, then flashes the two-digit error code one digit at a time, and repeats until the fault is cleared (
Where the fault shows on the drive
Each IAM (Integrated Axis Module) and AM (Axis Module) has its own four indicators: the seven-segment display and the Drive, COMM and Bus status indicators (Figures 23 and 24, pp. 47–48). Note which module, and which power-rail slot, shows the fault.
Seven-segment display at power-up
At power-up the display flashes the Sercos node address, then steps through the Sercos ring phases up to phase 4 (p. 126). The number it stops on is the step where it is stuck:
| Display | Meaning | Check |
|---|---|---|
| Actively cycling (phase 0) | Looking for a closed Sercos ring | Fiber-optic connections |
| Fixed 1 (phase 1) | Looking for active nodes | Node addressing |
| Fixed 2 (phase 2) | Configuring nodes for communication | Motor and drive configuration against the installed hardware |
| Fixed 3 (phase 3) | Configuring device-specific parameters | Motor catalog number against the selection |
| Fixed 4 (phase 4) | Configured and active | — |
| E and two digits | Drive faulted | Table 102 (p. 134) |
Drive, COMM and Bus indicators
| Indicator | State | Meaning and what to check |
|---|---|---|
| Drive | Off | Normal, no faults |
| Drive | Steady red | Drive faulted; read the seven-segment code |
| COMM | Off | No communication: loose or broken fiber, or receive and transmit swapped |
| COMM | Flashing green | Establishing communication; if it stays there, check that the node address matches the Sercos controller configuration |
| COMM | Steady green | Communication ready |
| Bus | Off | No DC bus power, or a fault exists; on a follower IAM, possibly not configured as "CommonBus Follow" |
| Bus | Flashing green | Bus present, axis disabled: no 24 V on Hardware Enable Input ( |
| Bus | Steady green | Bus present, axis enabled, no faults |
Source: Tables 103–105 (pp. 138–139).
Common error codes
| Code | Fault message (HIM) | Meaning per the manual | What to check |
|---|---|---|---|
| E00 | BusUndervoltage Fault (Blown fuse) | Blown fuse on the inverter board | Return the module for repair (p. 134) |
| E04 | MotorOvertemp Fault (Motor Overtemp) | Motor thermal switch tripped | Motor ambient, excessive current, MF connector wiring, motor selection (p. 134) |
| E05 | DriveOvercurrent Fault (Power Fault) | Power module (IPM) self-protection | Shorted motor cables or windings, fan and vents, acceleration/deceleration (p. 135) |
| E07 | MotFeedbackFault (Motor Feedback Loss) | Feedback wiring open, shorted or missing | Encoder wiring; run the Hookup test (p. 135) |
| E09 | BusUndervoltage Fault (Bus Undervoltage) | Three-phase present, DC bus below 275 V (460 V system) or 137 V (230 V system) | Incoming AC, line drops; disable follower axis before removing power (p. 135) |
| E10 | DriveOvervoltage Fault (Bus Overvoltage) | DC bus above 820 V (460 V) or 410 V (230 V); one cause listed is excessive regeneration | Deceleration profile, shunt module, input within specification (p. 135) |
| E19 | PositionErrorFault (Follow Error) | Position error limit exceeded | Position loop tuning, following error limit, mechanics, sizing (p. 135) |
| E34 | GroundShortFault (Ground Fault) | Excessive ground current in the converter | Motor wiring, internal motor ground short (p. 136) |
| E37 | PowerPhaseLoss Fault (Phase Loss Flt) | Input phase missing, or axis enabled when three-phase power was removed | Each phase; disable the axis before removing power (p. 136) |
| E38 | SercosFault (Sercos Ring Flt) | Sercos ring lost after being active | Fiber-optic cable present and connected (p. 136) |
| E43 | DriveEnableInput Fault (Drive Enable Flt) | Hardware Drive Enable input missing while enabled | Input active whenever the drive is enabled through software (p. 136) |
| E49 | DriveHardFault (Safe-off HW Flt) | Safe torque-off mismatch; no motion allowed | STO connector wiring, header seated, +24 V DC (p. 136) |
| E50 | SercosFault (Sercos Same ADDR) | Duplicate node address on the ring | A unique address per drive (p. 136) |
| E72 | DriveOvertemp Fault (Drive Overtemp) | Inverter thermal switch tripped | Module fan, cabinet temperature, duty cycle, blocked airflow (p. 137) |
| E73 | Communicate (Backplane Comm) | Power-rail CAN communication failed | Module mounting, foreign objects on the rail (p. 137) |
| E75 | DriveOvervoltage Fault (Shunt Time Out) | Shunt resistor continuous rating exceeded | Shunt sizing or duty cycle; an internal shunt may need an external one (p. 137) |
| E79 | DriveOvervoltage Fault (Shunt Module Flt) | Shunt module over-temperature or shunt fault, or shunt module missing | Shunt module indicators (p. 140); missing module or slot-filler (p. 138) |
| E90 | DriveHardFault (Precharge Timeout Flt) | Precharge resistor power above its rating | Wait for the resistor to cool (p. 138) |
On a DC common-bus system, E90 also appears when total bus capacitance exceeds the leader IAM's precharge rating; the fix is a larger leader IAM or fewer IPIM/AM modules (p. 16). E95 (IPIMFault) points to the IPIM manual,
Checks, step by step
- Record the full code before any reset: the E and both digits, the module and slot, and the three status indicators.
- Power faults (E09, E35 Precharge Fault, E37): measure AC on all three phases at the IAM input (pp. 135–136). For E37, check whether the axis was still enabled when power was removed.
- Feedback faults (E07, E20, E30, E64): encoder wiring at the MF connector, grounding, routing away from noise; run the Hookup test in Logix Designer.
- Sercos faults (E38, E50): fiber cables, receive/transmit, node address switches. A new IAM base node address takes effect only after the IAM is initialized by cycling control power (p. 108).
- E34: disconnect the motor power cable from the drive and enable with the current limit set to 0. If the fault clears, the cause is wiring or the motor; if not, contact your Rockwell representative (p. 136).
- E05: with all power and motor connections removed, check continuity from the DC bus to U, V and W (p. 135).
Fault actions in Logix Designer
Fault actions are set on the "Fault Actions" tab of Axis Properties: "Shutdown", "Disable Drive", "Stop Motion" or "Status Only" (p. 142). Only E04, E06, E16, E19, E43, E63, E64 and E72 are programmable; every other fault is Shutdown (pp. 142–145). Shutdown also disables axes that use the faulted axis as a cam or gear master and clears AxisHomedStatus (p. 142), so check homing before running in automatic.
For E04 and E72, firmware I2t protection folds back current instead of faulting; setting "Status Only" or "Stop Motion" bypasses the foldback and lets the fault occur (pp. 143, 145).
Clearing faults safely
Find and correct the cause before operating again; do not defeat the drive fault circuits (p. 133). Clearing a fault can restart the machine: follow the plant's permit and lockout rules. Before working on the drive, measure the DC bus or wait the time on the front warning label (p. 133). Keep the motor shaft still during power-up, Sercos phase-up and fault reset, or the drive gives E31 (p. 136).
- IPIM faults are cleared by a fault reset to the IAM, which also resets every IPIM on that rail (pp. 133–134).
- Shunt module faults stay latched until cleared with MASR, MAFR, MGSR or the HIM, and only after the DC bus has discharged (p. 139).
- Some conditions need two reset commands to clear drive and shunt module faults (p. 139).
When it is hardware
- E00, or the PWR indicator off with AC control power applied: return the module for repair (p. 134).
- E54, E60, E80: replace the module (pp. 136–138).
- E67, E71, E78: cycle power; replace the module if it persists (pp. 137–138).
- E69, E70: load default parameters, save to nonvolatile memory, then cycle power or reset (p. 137).
- E77: 230 V and 460 V modules mixed on one rail; replace the mismatched module (p. 138).
- E49 persisting after STO checks, reset and proof test: return the drive to Rockwell (p. 136).
What to record before calling for support
The code and module, the indicator states, each module's catalog number, the measured AC voltage and what the machine was doing. Kinetix 5500/5700 use a different code set: see Kinetix 5500/5700 fault codes. For replacement planning, see Kinetix 300/350/6000/Ultra3000 migration and the end-of-life lookup. Need an engineer on site: request support.
Frequently asked questions
How do I read the error code on a Kinetix 6000 seven-segment display?
The display shows an E, then flashes the two-digit code one digit at a time, repeating until the fault is cleared (
What is error E09 on a Kinetix 6000?
E09 BusUndervoltage Fault means three-phase power is present but the DC bus is below 275 V on a 460 V system or 137 V on a 230 V system (p. 135). Check the incoming AC voltage and line drops, and disable follower axes before removing power.
How do I fix E49 Safe-off HW Flt on a Kinetix 6000?
E49 is a safe torque-off mismatch and the drive does not allow motion. Check the STO connector wiring, that the header is seated and that +24 V DC is present, then reset and run the proof test; if it persists, return the drive to Rockwell (p. 136).
Why does a Kinetix 6000 show E90 Precharge Timeout?
E90 means the precharge resistor power is above its rating; wait for it to cool (p. 138). On a DC common-bus system it also appears when total bus capacitance exceeds the leader IAM's precharge rating (p. 16).
Sources
- Rockwell Automation,
2094-UM001M-EN-P , Kinetix 6000 Multi-axis Servo Drives User Manual, 12/2022 — pp. 16, 47–48, 108, 126, chapter 7 "Troubleshoot the Kinetix 6000 Drive System" (pp. 133–146)
Read 8 November 2026. This article paraphrases the sources and does not quote them; read the original documents before designing or working on a system. Links open the latest edition in Rockwell's literature library; page numbers refer to the edition cited.