HMI Overview

Main Unit Functions

The FU-ES features a dual-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

Button Functions

The main unit has four buttons. The bottom line of the LCD, Line 3, shows the function of each button. The buttons are typically defined as follows:

Button Functions (Click to Expand)

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

• Blue Button (leftmost): Return, exit, or save settings.

• Gray Direction Buttons:

  • Left Gray: Previous Page, decrease value, or select item

  • Right Gray: Next Page, increase value, or select item

• Orange Button (rightmost): Rightmost button: Enter settings, edit, or confirm selection

Do not hold buttons for extended periods to avoid damage.

Button functions may change depending on the operation context to improve usability or prevent accidental presses.

LCD Three-Color Backlight Function

The system provides a three-color backlight display. The red backlight only activates when the alarm setting is “On”. If the setting is “DND (Do Not Disturb)” or “Off”, the backlight remains off. The meanings of each color are as follows:

1

Green Backlight

• System operating normally

• Displaying real-time information

• All data within normal range

2

Flashing Red Backlight

• Major abnormality (Alarm A) detected

• Refer to Alarms and System Status for more information

3

Red Backlight

• Alarm B: User-defined alert condition triggered

• Alarm C: Maintenance reminder condition reached

• Refer to Alarms and System Status for more information

4

Orange Backlight

• System operating normally

• Display is currently on the Settings page, not a real-time information screen

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.

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Frequency of data update

Because real-time flow data updates frequently, the LED screen updates before the LCD screen. The difference between the two displays may be about 0.1 seconds. If the value has only a few digits, use the LED screen as the primary reference.

Displayed digits on LED screen

The LED screen displays up to five digits. If the value exceeds five digits, FFFFF appears on the LED screen, as shown below. To read the complete value, change the units or check the second row of the LCD screen.

When flow is reversed and the value is negative, the first digit is a minus sign and the remaining four positions show the value.