# 4.4 Communication (通訊)

| ​Title                        | ​Title                                                                                                                                                    |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| RS485 Baud rate(RS485 鮑率)     | <p>設定 RS485 使用的訊號傳輸速率。<br><mark style="color:red;"><strong>鮑率 Baud 如設定 38400， 57600 ，請勿用 N81 以外的設定。</strong></mark></p>                                   |
| Node ID(Modbus RTU節點編號)       | 設定 Modbus 使用的節點編號                                                                                                                                         |
| RS485 Byte Format(RS485 位元格式) | <p>設定RS485 位元格式，提供以下四種格式:</p><p>1) N.8.1</p><p>2) N.8.2 </p><p>3) O.8.1 </p><p>4) E.8.1</p>                                                               |
| RS485 Endianness(RS485 端序)    | <p>設定RS485 端序，提供以下四種端序:</p><p>1) Big Endian</p><p>2) Little Endian                              </p><p>3) Mid Big Endian </p><p>4) Mid Little Endian </p> |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.lorric.com/qr/fu-tx310-ultrasonic-flowmeter-manual-chinese-v3/untitled-6/untitled-3.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.