# HMI Overview

### Main Unit Functions

The FP-AS510 features a **3-row, 3-color backlit LCD screen** display for detailed data, page names, units, and button labels:

* Line 1: Current page name and units
* Line 2: Actual measured data
* Line 3: Available key functions for the current screen 

<figure><img src="/files/SUHhEvZGzYJZzILzio1s" alt=""><figcaption></figcaption></figure>

### **Button Functions**

The main unit has 4 buttons. The bottom line of the LCD (Line 3) shows the function of each button. Typically, the buttons are defined as follows:

<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="/spaces/i4ECt41Kyy9211OWazj4/files/bdd75120acea6361d128fd3deec06f1a8277e667" alt="" data-size="line"> **Blue Button -** Leftmost button: Return, exit, or save settings.

Gray Arrow Buttons:

* <img src="/spaces/i4ECt41Kyy9211OWazj4/files/2e37e572251371c6020ab6d9e11c1fcdd5ef0369" alt="" data-size="line"> **Left Gray Button:** Previous Page, decrease value, or select item
* <img src="/spaces/i4ECt41Kyy9211OWazj4/files/50a67ff5744401e217d5b9e838da3f7909be732f" alt="" data-size="line"> **Right Gray Button:** Next Page, increase value, or select item
* <img src="/spaces/i4ECt41Kyy9211OWazj4/files/6c0b22a2048cf9b2afd86fac7a65e414feb967d4" 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>

<figure><img src="/files/LcWsi3HKHCWTGR9MnenI" alt=""><figcaption></figcaption></figure>

### **LCD Three-Color Backlight Function**

<figure><img src="/files/5o35gobw47YzHFGoE95d" alt=""><figcaption></figcaption></figure>

The system provides a three-color backlight display. The **red backlight** is only activated when the alarm setting is **“On”**; if set to **“DND (Do Not Disturb)”** or **“Off”**, the backlight will remain off. The meanings of each color are as follows:

{% stepper %}
{% step %}

### **Green Backlight**

* System operating normally
* Displaying real-time information
* All data within normal range
  {% endstep %}

{% step %}

### **Flashing Red Backlight**

* Major abnormality (**Alarm A**) detected
* Refer to the [**Alarms and System Status**](/qr/fp-as310-english-v5/user-interface/alarm-priority-and-display-method.md) for more information
  {% endstep %}

{% step %}

### **Red Backlight**

* **Alarm B:** User-defined alert condition triggered
* **Alarm C:** Maintenance reminder condition reached
* Refer to the [**Alarms and System Status**](/qr/fp-as310-english-v5/user-interface/alarm-priority-and-display-method.md) for more information
  {% endstep %}

{% step %}

### **Orange Backlight**

* System operating normally
* Display currently on **Settings page**, not real-time information
  {% endstep %}
  {% endstepper %}

{% hint style="info" %}

#### **DND (Do Not Disturb) Mode**

* System detects abnormalities, but **red backlight remains off**.
* Example: **Alarm-A “4 Off Pipe”** triggers no backlight.
* Abnormalities still appear on the **Abnormalities page**.
* **RS485** connection still sends alarm signals.
* **OCT output** continues to signal alarms if configured.
  {% endhint %}


---

# 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/fp-as310-english-v5/user-interface/user-interface-explanation.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.