FAQ

IO-Link - Index 37 - Detailed Device Status

Article No: KA-09198

Version: 1.0

Subject to change without notice

what information is hidden in Index 37 (Detailed Device Status)

Index 37 - Detailed Device Status

At least for newer sensors, the index (ISDU) 37 can be found - in addition to Index 36.

When looking into the IO-Link sheet, the following can be seen: (Example)

IO-Link specific
Index dec (hex)	Name	Format (Offset)	Length	Access	Default Value	Value / Range	Remark
36 (0x24)	Device Status	Uint	8 Bit	ro	3	0 = Device is OK 1 = Maintenance required 2 = Out of specification 3 = Functional check 4 = Failure 5...255 = Reserved
37 (0x25)	Detailed Device Status	Array	24 Byte	ro		Octet String [8]	Provides a chronologic list about currently pending events of type "Error" or "Warning"

How is the Detailed Device Status decrypted?

Detailed Device Status	N x 3 Byte	Event Log containing last five events which occurred at the sensor. For each array element: Octet 1: Event qualifier Octet 2, 3: Event code
Event 1	3 Byte	0x000000 = no Event appeared 0xF45000 = Error appeared - hardware fault 0xE48CA4 = Warning appeared - QoR (Quality of Run) Alarm 0xE48CA0 = Warning appeared - short circuit 0xE48CA8 = Warning appeared - temperature high 0xE48CAB = Warning appeared - operating hours 0xE48CAF = Warning appeared - temperature low
Event 2	3 Byte
Event 3	3 Byte
Event …	3 Byte
Event N	3 Byte

How about Event qualifier and Event code?

For Index 37:

Instance = always "Application"

Source = always Device

Type = Warning or Error (no Notification)

Mode = only "Event appears"

Event Qualifier
Mode		Type		Source	Instance
Bit 7	6	5	4	3	2	1	Bit 0
0 = reserved 1 = Event single shot 2 = Event disappears 3 = Event appears		0 = reserved 1 = Notification 2 = Warning 3 = Error		0 = Device 1 = Master	0 = unknown 1…3 = reserved 4 = Application

Keywords:
IO-Link, Index 37, Detailed Device Status, io link