# IOMod IEC 60870-5-103 Slave firmware change-log

Elseta IOMod series devices support's IEC 60870-5-103 Slave protocol.

<p class="callout info">This firmware can be used for IOMod series devices: IOMod 8DI8DO v1.x, IOMod 16DI v1.x, IOMod 8AI v1.x, IOMod 4RTD v1.x, IOMod HT v1.x</p>

<p class="callout warning">This version does not support IOMod 4Cs4Vs model. </p>

<table border="1" id="bkmrk-firmware-version-rel" style="border-collapse: collapse; width: 100%; height: 155px;"><tbody><tr style="height: 29px;"><td style="width: 12.1605%; height: 29px;">Firmware</td><td style="width: 4.75311%; height: 29px;">Version</td><td style="width: 7.1605%; height: 29px;">Release Date</td><td style="width: 25.926%; height: 29px;">Changes</td></tr><tr><td style="width: 12.1605%;">IOMOD\_IEC\_103\_v1\_8\_5.bin</td><td style="width: 4.75311%;">v1.8.5</td><td style="width: 7.1605%;">2023-07-28</td><td style="width: 25.926%;">- added 8DI4RO support

</td></tr><tr style="height: 68px;"><td style="width: 12.1605%; height: 68px;">IOMOD\_IEC\_103\_1\_8\_1.bin</td><td style="width: 4.75311%; height: 68px;">v1.8.1</td><td style="width: 7.1605%; height: 68px;">2020-07-01</td><td style="width: 25.926%; height: 68px;">- Fixed SPI readings for IOMod 8AI by lowering SPI clock speed to 400kHz

</td></tr><tr style="height: 29px;"><td style="width: 12.1605%; height: 29px;">IOMOD\_IEC\_103\_1\_8\_0.bin</td><td style="width: 4.75311%; height: 29px;">v1.8.0</td><td style="width: 7.1605%; height: 29px;">2019-08-23</td><td style="width: 25.926%; height: 29px;">- Fixed crash introduced by a higher range of temperatures (&gt;40 C)
- Only commands with correct address confirmed;
- Feedback should only be sent after a command, not after GI or manual input change
- <span style="text-decoration: underline;">Known issue</span> 8AI cannot ready data properly via SPI

</td></tr><tr style="height: 29px;"><td style="width: 12.1605%; height: 29px;">IOMOD\_IEC\_103 \_v1.7.3.bin</td><td style="width: 4.75311%; height: 29px;">v1.7.3</td><td style="width: 7.1605%; height: 29px;">2019-01-30</td><td style="width: 25.926%; height: 29px;">- FCB/FCV bit fix
- Introduced broadcasting function - time synchronization can be done by sending a broadcast message
- Fixed a possible race condition where two or more inputs change at once and stop IOMod device from getting inputs further. Inputs are now polled every 1 ms.
- <span style="text-decoration: underline;">Known issue</span> Commands accepted even if wrong address used
- <span style="text-decoration: underline;">Known issue </span>Feedback should only be sent after a command, not after GI or manual input change

</td></tr></tbody></table>