> For the complete documentation index, see [llms.txt](https://enless.gitbook.io/centre-aide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://enless.gitbook.io/centre-aide/guides-installation/documentation-en/gateway-and-receivers/rx-modbus/troubleshooting.md).

# Troubleshooting

RX MODBUS: troubleshooting

<h2 align="center">Troubleshooting</h2>

<p align="center">Need help with your RX MODBUS? Access our FAQ below or ask your question to the assistant</p>

<p align="center"><button type="button" class="button primary" data-action="ask" data-icon="gitbook-assistant">Ask your question</button><a href="/centre-aide/assistance/assistance-en/assistance/faq.md" class="button primary">Access the FAQ</a></p>

<h4 align="center"><i class="fa-arrow-trend-up">:arrow-trend-up:</i> Frequently asked questions</h4>

<details open>

<summary><strong>What is the receiver's power consumption?</strong></summary>

Consumption is normally less than 50 mA at 12 V. During the sensor installation phase, there may be peaks of 500 mA.

To avoid any issues, please maintain 1 A at 12 V on the power terminal block.

</details>

<details>

<summary><strong>What is the maximum number of simultaneous TCP clients?</strong></summary>

The Enless receiver behaves like a server and can only accept one client at a time. Being queried by another Modbus device can disrupt Modbus communication with the current TCP client.

</details>

<details>

<summary><strong>What function codes are supported by the RX MODBUS?</strong></summary>

Below are the supported function codes for **reading** Modbus registers:&#x20;

* 01: Read coil-type registers&#x20;
* 03: Read holding-type registers
* 04: Read input-type registers&#x20;

Below are the supported function codes for **writing** in Modbus registers:

* 05: Write single Coil.
* 06: Write single register.
* 15: Write multiple coils&#x20;
* 16: Write multiple registers

</details>

<details>

<summary><strong>What does a red icon next to my sensor on the TX CONFIG page mean?</strong></summary>

The red reload badge on the server of a LoRa Easy receiver indicates that a new configuration has been set for a transmitter, but it has not yet been received by it. \
\
Why does this happen?

* Enless transmitters are bidirectional only at power-up.
* After receiving their initial configuration, they send frames but can no longer receive live changes.

How can the configuration be forced?

* Unplug then reconnect the transmitter battery so it applies the configuration as on first startup.
* Hold down the transmitter push button for 5 seconds.&#x20;

</details>


---

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