# 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 ](https://docs.lorric.com/qr/fu-lt-english-v1/communication/rs485-modbus-rtu)Settings section.

### Operation Procedure

<details>

<summary><strong>Button Functions (Click to Expand)</strong></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="https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/BZuNjMgY75LH0onY5NtL/image" alt="" data-size="line"> **Blue Button -** Leftmost button: Return, exit, or save settings.

Gray Arrow Buttons:

* <img src="https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/Br88VpmnPLAPdutxVdZb/image" alt="" data-size="line"> **Left Gray Button:** Page up, increase value, or select item
* <img src="https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/3Dzp8nuxmHsaZ7LqBscw/image" alt="" data-size="line"> **Right Gray Button:** Page down, decrease value, or select item
* <img src="https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/sq6fX6r39JE0Au2hahAR/image" 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="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2FkbzOGn3VWxnzQkD9meBy%2FFU-LT-E15-en.png?alt=media&#x26;token=a22e2c26-efdc-4d31-8b11-46c1243b66ef" alt="" width="375"><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>

> This parameter **cannot be modified via RS485**.