iqMAXREFDES23 Demo Board
Maxim's Santa Cruz (MAXREFDES23#) reference design is the world's smallest IO-Link® light sensor compliant with IEC 61131-9. The entire design fits onto a 6.5mm x 25mm printed circuit board (PCB).
Sensor simple logic
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)|
An IODD (IO Device Description) is a set of files that formally describes an IO-Link Device. An IODD is mandatory for each IO-Link Device.
The IODD is created by the device vendor and shall be sufficient for IO-Link Tools to identify, communicate, parameterize and diagnose the device.
The file name shall follow the following rule:
<vendor name>-<device name>-<date of file creation>-IODD<schema version>.xml
for iqMAXREFDES23 it's correspond for:
IODD basic concepts
Actually, the data types form the following hierarchy:
For example (BooleanT with enums):
- Byte (MSB): Light intensity (from 0 to 255).
- Byte (LSB): [.......F - light intensity switch-point flag (1bit)].
|IO-Link index||Mode||Description||Default value|
|256 (0x0100)||read/write||Ambient light switch-point level||128 (0x80)|
|257 (0x0101)||read/write||Ambient light switch-point hysteresis||16 (0x10)|