# Configuration Modbus

##### DIP switch configuration

This is DIP switch functions diagram for Modbus RTU configuration. For enable Modbus RTU protocol 1 switch should be in OFF position.

[![AMB-8I-4O-DIP-1.png](https://docs.atreyo.in/uploads/images/gallery/2025-03/scaled-1680-/amb-8i-4o-dip-1.png)](https://docs.atreyo.in/uploads/images/gallery/2025-03/amb-8i-4o-dip-1.png)

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<dl id="bkmrk-switch-baudrate-0000"><dd>##### Baudrate configuration

Baudrate configuration for both Modbus and IEC

<dl id="bkmrk-switch-baudrate-0000-1"><dd><table border="1" style="border-collapse: collapse; width: 35.4762%;"><thead><tr><td>Switch</td><td>Baudrate</td></tr></thead><tbody><tr><td>0000  
</td><td>9600</td></tr><tr><td>0001  
</td><td>1200</td></tr><tr><td>0010  
</td><td>2400</td></tr><tr><td>0011  
</td><td>4800</td></tr><tr><td>0100  
</td><td>14400</td></tr><tr><td>0101  
</td><td>19200</td></tr><tr><td>0110  
</td><td>28800</td></tr><tr><td>0111</td><td>38400</td></tr><tr><td>1000  
</td><td>57600</td></tr><tr><td>1001  
</td><td>76800</td></tr><tr><td>1010  
</td><td>115200</td></tr><tr><td>1011  
</td><td>230400</td></tr><tr><td>1100  
</td><td>256000</td></tr><tr><td>1101  
</td><td>460800</td></tr><tr><td>1110  
</td><td>576000</td></tr><tr><td>1111  
</td><td>921600</td></tr></tbody></table>

</dd></dl>---

##### Address configuration for Modbus RTU

<table border="1" style="border-collapse: collapse; width: 47.2619%; height: 710.4px;"><thead><tr style="height: 32.2px;"><td style="height: 32.2px;">Switch</td><td style="height: 32.2px;">Value</td><td style="height: 32.2px;">Modbus Address</td></tr></thead><tbody><tr style="height: 32.2px;"><td style="height: 32.2px;">00000</td><td style="height: 32.2px;">0  
</td><td style="height: 32.2px;">1  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">00001</td><td style="height: 32.2px;">1  
</td><td style="height: 32.2px;">2  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">00010</td><td style="height: 32.2px;">2  
</td><td style="height: 32.2px;">3  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">00011</td><td style="height: 32.2px;">3  
</td><td style="height: 32.2px;">4  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">00100</td><td style="height: 32.2px;">4  
</td><td style="height: 32.2px;">5  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">00101</td><td style="height: 32.2px;">5  
</td><td style="height: 32.2px;">6  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">00110</td><td style="height: 32.2px;">6  
</td><td style="height: 32.2px;">7  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">00111</td><td style="height: 32.2px;">7  
</td><td style="height: 32.2px;">10  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">01000</td><td style="height: 32.2px;">8  
</td><td style="height: 32.2px;">20  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">01001</td><td style="height: 32.2px;">9  
</td><td style="height: 32.2px;">30  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">01010</td><td style="height: 32.2px;">10  
</td><td style="height: 32.2px;">40  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">01011</td><td style="height: 32.2px;">11  
</td><td style="height: 32.2px;">50  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">01100</td><td style="height: 32.2px;">12  
</td><td style="height: 32.2px;">60  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">01101</td><td style="height: 32.2px;">13  
</td><td style="height: 32.2px;">70  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">01110</td><td style="height: 32.2px;">14  
</td><td style="height: 32.2px;">80  
</td></tr><tr style="height: 34.2px;"><td style="height: 34.2px;">01111</td><td style="height: 34.2px;">15  
</td><td style="height: 34.2px;">90  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">10000</td><td style="height: 32.2px;">16  
</td><td style="height: 32.2px;">100  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">10001</td><td style="height: 32.2px;">17  
</td><td style="height: 32.2px;">110  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">10010</td><td style="height: 32.2px;">18  
</td><td style="height: 32.2px;">120  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">10011</td><td style="height: 32.2px;">19  
</td><td style="height: 32.2px;">130  
</td></tr><tr><td>10100</td><td>20  
</td><td>140  
</td></tr><tr><td>10101</td><td>21  
</td><td>150  
</td></tr><tr><td>10110</td><td>22  
</td><td>160  
</td></tr><tr style="height: 32.2px;"><td style="height: 32.2px;">10111</td><td style="height: 32.2px;">23  
</td><td style="height: 32.2px;">170  
</td></tr><tr><td>11000</td><td>24  
</td><td>180  
</td></tr><tr><td>11001</td><td>25  
</td><td>190  
</td></tr><tr><td>11010</td><td>26  
</td><td>200  
</td></tr><tr><td>11011</td><td>27  
</td><td>210  
</td></tr><tr><td>11100</td><td>28  
</td><td>220  
</td></tr><tr><td>11101</td><td>29  
</td><td>230  
</td></tr><tr><td>11110</td><td>30  
</td><td>240  
</td></tr><tr><td>11111</td><td>31  
</td><td>250  
</td></tr></tbody></table>

<p class="callout info">Address 1–247 → valid slave IDs for individual devices  
Address 0 → reserved for broadcast messages; all slaves receive it but no one replies   
Addresses 248–255 → reserved/unassigned (not permitted for standard device addressing)</p>

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