In iqmaxrefdes23 have been implemented simple switch-point hysteresis logic and additionally can be configured as normally open (NO) or normally closed (NC).
By default light switch-point settings (255 is the maximal value):
|Light intensity||128 (0x80)||16 (0x10)||Normally Open (NO)|
|Darkness control||16 (0x10)||4 (0x04)||Normally Closed (NC)|
When a device is in IO-Link OPERATE mode, light intensity switch-point flag indicated on digital output channel (red LED).