User Documentation¶
Introduction¶
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).
Board Specification¶
| Item | Specification |
|---|---|
| Oscillator Frequency | 18.432 MHz |
| Microcontroller | Renesas RL78/G1A (R5F10E8EALA) |
| DC Power | 24 V via M12 Connector |
| LEDs |
|
| IO-link Connector | Male M12 4-pole A-coded |
| IO-Link PHY | Maxim MAX14821EWA+ |
| Sensor | Maxim MAX44008EDT+ |
Project Goal¶
The purpose of this project is by giving the user a strong basis to start develop production-ready IO-Link® application based on Maxim Integrated IO-Link device transceiver (MAX14821), a Renesas ultra-low-power, 16-bit microcontroller (RL78) and iqStack® IO-Link Device Stack.
Sensor 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):
| What | SP (Level) | Hysteresis | Mode |
|---|---|---|---|
| Light intensity | 128 (0x80) | 16 (0x10) | Normally Open (NO) |
| Darkness control | 16 (0x10) | 4 (0x04) | Normally Closed (NC) |
Note
When a device is in IO-Link OPERATE mode, light intensity switch-point flag indicated on digital output channel (red LED).
IO-Link Application¶
iqmaxrefdes23 communicates with an IO-Link Master on COM3 transmission rate (230,4 kbit/s).
Note
When a device is switched to IO-Link SIO mode, sensors chip is switched to shutdown mode, microcontroller fall into HALT and restarting operation upon wake-up interrupt signal.
Process Data In¶
- Byte (MSB): Light intensity (from 0 to 255).
- Byte (LSB): [.......F - light intensity switch-point flag (1bit)].
Process Data Out¶
Be absent.
Commands¶
Can be run by IO-Link Index 0x0002:
| Value | Description |
|---|---|
| 128 (0x80) | Device Reset |
| 160 (0xA0) | Tech-in light intensity switch-point level |
Parameters¶
| IO-Link index | Mode | Description | Default value |
|---|---|---|---|
| 16 (0x0010) | read-only | Vendor Name | Renesas Electronics Europe GmbH |
| 17 (0x0011) | read-only | Vendor Text | Major supplier of semiconductor solutions |
| 18 (0x0012) | read-only | Product Name | Santa Cruz (MAXREFDES23#) |
| 19 (0x0013) | read-only | Product ID | MAXREFDES23 |
| 20 (0x0014) | read-only | Product Text | IO-Link Light Sensor |
| 23 (0x0017) | read-only | Firmware Revision | v1.1.1 |
| 256 (0x0100) | read/write | Ambient light switch-point level | 128 (0x80) |
| 257 (0x0101) | read/write | Ambient light switch-point hysteresis | 16 (0x10) |
| 258 (0x0102) | read/write | MAX44008EDT+ sensors chip sensivity | 1 (0x01) |
| 259 (0x0103) | read-only | MAX44008EDT+ sensors chip temperature | unknown |
Events¶
| Event code | Description |
|---|---|
| 0x1800 | Occurred when a light intensity is very low, see Sensor Logic |
Installation Details¶
There are two ways to experiment with MAXREFDES23#:
- Upload Firmware HEX-file, connect a device to IO-Link Master and play around.
- Clone the source code from Bitbucket repository, go throw and try to debug.
Firmware¶
Firmware HEX-file, IODDs data and this document in PDF format can be downloaded from the Bitbucket repository absolutely free without registration.
To upload HEX-file into MAXREFDES23 have to get Renesas E1 emulator and also Renesas Flash Programmer.
Source Code¶
The project source code can be cloned from the Bitbucket repository freely without registration.
Download a trial version of IAR RL78 Embedded Workbench IDE in order to compile it and also take a look for Renesas Application Leading Tool (Applilet).
Also the Renesas E1 emulator and Renesas Flash Programmer needed to start debug session with a device.
Troubleshooting¶
If during power-on self-test (POST) hardware fails were occurred, then the main sensor application will not started and instead a first appeared hardware fail number was blinked on digital output red-indicator channel continuously.
| Blinks Count | Fail Description |
|---|---|
| 1 | Renesas RL78 Illegal memory access (a firmware error, contact with developers) |
| 2 | Renesas RL78 RAM parity check (a firmware error, contact with developers) |
| 3 | Renesas RL78 Illegal instruction (a firmware error, contact with developers) |
| 4 | Maxim MAX14821EWA+ selfcheck (the device is possibly corrupt, try to restart) |
| 5 | Maxim MAX44008EDT+ selfcheck (the device is possibly corrupt, try to restart) |
License¶
All source files with the correspondent header notes are the subject to the IQ² Development GmbH terms and conditions defined in file Allgemeine Vertragsbedingungen.pdf.
For any other details please contact with us.