# HMI Overview

### Main Unit Functions

The FU-ES features Double-screen display:

* A **5-digit LED display** for high-contrast real-time data readout
* A **3-row, 3-color backlit LCD screen** 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/tWichDsCCSJeZIThhgOO" 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>

When the main screen is displayed in **green backlight**, the four buttons function as follows:

* <img src="/files/bdd75120acea6361d128fd3deec06f1a8277e667" alt="" data-size="line"> **Blue Button (leftmost):** 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):** 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/FZpRrCZya8VI9SmdVEQB" alt=""><figcaption></figcaption></figure>

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

<figure><img src="/files/KlXbpuAX2snGp2Qv76lB" 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 [**Warning Details page**](broken://pages/d03adcb8ee32e777f55eb6ff2164bb738c1a9ab4) for more information
  {% endstep %}

{% step %}

### **Red Backlight**

* **Alarm B:** User-defined alert condition triggered
* **Alarm C:** Maintenance reminder condition reached
* Refer to the [**Warning Details page**](broken://pages/d03adcb8ee32e777f55eb6ff2164bb738c1a9ab4) 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 %}

***

## **Frequency of data update**

Due to frequent data updates for real time flow volume, data on the LED screen will update first, then data on the LCD screen. Therefore, they may have about 0.1 seconds updated time difference. between both data sets.If there are not many digits in the data, please use the LED screen for the main data.

## **Displayed digits on LED screen**

Maximum 5 displayed digits are provided on the LED screen. If data digits exceed more than 5 digits, “FFFFF” will be displayed on the LED screen (please refer to the image below). At this time, for reading complete data, you can try to modify the units or see the 2nd row data on the LCD screen to confirm exact flow volume.

<figure><img src="/files/JygPoNuuH8yxrZ96epbe" alt=""><figcaption></figcaption></figure>

**When the flow direction is reversed and the data is a negative number, the 1st digit will be a minus sign with four remaining digits.**


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