# C263A39 Motor Encoder CRC Invalid

Alarm codes · `C263A39` · verification: source checked

The CRC check of the motor encoder data failed, so the data was rejected as invalid.

## Specification

| Property | Value |
|---|---|
| Code | C263A39 |
| Meaning | The CRC check of the motor encoder data failed, marking the data as invalid. |
| Remedy | Perform a complete reboot sequence, update the software, or contact your local Universal Robots service provider for assistance. |

## Connected

- Controllers: [Universal Robots e-Series Control Box](https://machineschema.com/controller/universal-robots-e-series-control-box.md)

## Sources

1. [C263 Motor Encoder](https://www.universal-robots.com/manuals/EN/HTML/SW5_26/Content/prod-err-codes/topics/CODE_263.html) (accessed 2026-10-26)

---

Source page: https://machineschema.com/alarm/ur-c263a39  
JSON: https://machineschema.com/alarm/ur-c263a39.json  
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite Machine Schema and the original sources.