Diagnostics of the Sercos Master

Diagnostics via the Sercos LED

The LED S3 provides information on diagnostics related to Sercos.

	LED color	Description
	Off	State NRT (no Sercos communication)
	Orange	Communication phase is CP0, CP1, CP2 or CP3
	Green	Communication phase is CP4
	Red	State error

Acknowledging Detected Errors

If an error is detected, remove the cause of the detected error. After that, use the parameter DesiredPhase of the parameter group SercosPhaseChanger to set the master to the communication state NRT and then back to the required communication phase.

Diagnostics via Parameter

Use the parameter IDN S-0-0390 (Diagnostic Number) to read diagnostics information from the Sercos slaves.

Additional Information in Loggers

The CODESYS Logger and the Message Logger provide additional messages. Refer to these logger entries for information regarding troubleshooting, commissioning, and diagnostics.