Use CIP Messages to Retrieve the IO-Link Event Log

To retrieve the IO-Link event log, follow the definition of the Event Log object (class 0x41) that is defined in the CIP Specification Volume 1 and Volume 7C. See IO-Link Interface and System Specification at io-link.com.

Event Log Entry in Get IO-Link Event Log Response

Byte Offset	Bit Offset	Parameter
0	0…2	Reserved
	3	Event Location (always 1 for IO-Link master module)
	4…5	Event Type
	6…7	Event Mode
1…2	—	Event Code
3…10	—	Timestamp (only exists when IO-Link Event Timestamp is enabled)

You can use either attribute 14 or 22 to retrieve the event log.

To retrieve the Event Log for an IO-Link port, use a CIP message with the following specifications:

Communication Path = To IO-Link master module
Instance = Port Number + 1