# Self-Diagnosis and Error Codes The SENSORswitch includes the following diagnosis features: - **Self-Test**: When triggered by the respective IO-Link System Command: - The capacitive measurement circuit is stimulated, producing an "actuation" for 200 ms - The RGB LED is checked electrically - **Monitoring** of Supply Voltage and MCU Temperature - **Output Overload Detection** Detected errors are indicated via IO-Link Events and/or in the **Error Code** IO-Link Parameter, as well as by blinking patterns of the LED. ## Error Codes

Blink Code	IO-Link Error Code	Description
1	0x0001	Internal error
5	0x0010	Test of capacitive sensor failed
8	0x0080	Memory error
12	0x0800	LED error
13	0x1000	Overload error on digital output

## Revision History ### Rev. A – 2021-07-09 - Initial release with HTML documents for each CANEO series4x variant ### Rev. B – 2022-06-23 - Unified document for all CANEO series4x variants ### Rev. C – 2023-08-07 - Added introduction, section Self-Diagnosis and Error Codes, and legal and trademark notice - Added explanation for IO-Link Process Data bit indexing and length of ISDUs - Document layout changed to A4 format ### Rev. D – 2024-05-02 - More clear explanation of selection of LED Control Mode / IO-Link Process Data output - Marked "o" as a Displayable Character - Correct assignment of Device IDs to variants ### Rev. E – 2024-10-11 - Added illustration of LED indexing - Added illustration of each Process Data structure