> For the complete documentation index, see [llms.txt](https://docs.lorric.com/qr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lorric.com/qr/fp-as310-english-v5/parameters/e-commute/e-commute-fp-as310r/e15-byte-format.md).

# E15 Byte Format

### Definition

Sets the data format for Modbus RTU communication. Default: N,8,1 (No parity, 8 data bits, 1 stop bit).

This parameter offers **four byte packet formats**:

| Option | Name                            |
| ------ | ------------------------------- |
| N.8.1  | No parity bit with 1 stop bit   |
| N.8.2  | No parity bit with 2 stop bits  |
| O.8.1  | Odd parity bit with 1 stop bit. |
| E.8.1  | Even parity bit with 1 stop bit |

The diagram below illustrates each packet format. **ST** represents the start bit, **D0–D7** are data bits, **SP** is the stop bit, **OP** indicates odd parity, and **EP** indicates even parity.\
(Each diamond shape represents one bit.)

<div align="left"><figure><img src="https://docs.lorric.com/qr/~gitbook/image?url=https%3A%2F%2F598628291-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FYbqXsfQyaXKmr6mxssGy%252Fuploads%252FLsx1JRjVa9908XZc3c1a%252Fuart_byte_format.png%3Falt%3Dmedia%26token%3D05c4ddf7-0fbe-4487-85f4-3cde6a2c2147&#x26;width=768&#x26;dpr=4&#x26;quality=100&#x26;sign=674c2433&#x26;sv=2" alt=""><figcaption></figcaption></figure></div>

#### **Modbus Formats** Converter

{% embed url="<https://codepen.io/philo_lorric/pen/BagqoRj>" %}

### Notes

1. This parameter cannot be modified via RS485.&#x20;
2. For details, refer to the [RS485 and Modbus RTU ](broken://pages/b85c0d01a25eb3e3bc2f56ebe3f6f8ea98b1e18a)Settings section.

### Operation Procedure

<details>

<summary><strong>Button Functions</strong> <em>(Click to Expand)</em></summary>

The main unit has **four buttons**. The **bottom line (Line 3)** of the LCD displays the current function of each button. Under normal operation, the button functions are as follows:

* <img src="/files/bdd75120acea6361d128fd3deec06f1a8277e667" alt="" data-size="line"> **Blue Button:** Leftmost button: Return, exit, or save settings.
* Gray Direction Buttons:
  * <img src="/files/2e37e572251371c6020ab6d9e11c1fcdd5ef0369" alt="" data-size="line"> **Left Gray:** Previous Page, decrease value, or select item
  * <img src="/files/50a67ff5744401e217d5b9e838da3f7909be732f" alt="" data-size="line"> **Right Gray:** Next Page, increase value, or select item
* <img src="/files/uJJ6BEZ4sukIlwQaHrUB" alt="" data-size="line"> **Orange Button:** Rightmost button: Enter settings, edit, or confirm selection

{% hint style="danger" %}
**Do not hold buttons for extended periods to avoid damage.**
{% endhint %}

{% hint style="info" %}
Button functions may change depending on the operation context to improve usability or prevent accidental presses
{% endhint %}

</details>

```
E15 Byte Format Setting Steps
• From the main screen (green backlight), 
  press Orange Button (Setup) to enter settings (orange backlight).
• Use Gray Arrow Buttons to select E. Commute  , press Orange Button (Enter).
• Use Gray Arrow Buttons to select E15 Byte, press Orange Button (Enter).
• Use Gray Arrow Buttons to choose the options. 
• Press Orange Button (Set) to confirm.
• Press Blue Button (ESC) to return to the main screen (green backlight).
```

<figure><img src="/files/bTgVB7B6HtXV7b4Xo2v6" alt="" width="288"><figcaption></figcaption></figure>

### E15 Options, RS485 Values, Read/Write Commands, and Formats

<table><thead><tr><th width="196.08984375">Option</th><th>Description</th><th>RS-485 Value</th><th data-hidden>RS-485 對應數字</th></tr></thead><tbody><tr><td>N.8.1 (Default)</td><td>No parity, 8 data bits, 1 stop bit</td><td>-</td><td>0</td></tr><tr><td>N.8.2</td><td>No parity, 8 data bits, 1 stop bit</td><td>-</td><td>3</td></tr><tr><td>O.8.1</td><td>Odd parity, 8 data bits, 1 stop bit</td><td>-</td><td>2</td></tr><tr><td>E.8.1</td><td>Even parity, 8 data bits, 1 stop bit</td><td>-</td><td>1</td></tr></tbody></table>


---

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