VisualHMI word setting button: constant writing, increment/decrement, long-press adjustment, and button mutual exclusion

The word setting button is awrite-onlycontrol dedicated to writing predefined values to registers: parameter setting, mode switching, and command issuing. It supports writing constants, increment/decrement, and pressing to write A and releasing to write B (pulse mode).

1. Core functions

• Constant writing: Click to write a fixed value (e.g., writing 100 = target temperature 100℃)
• Increment/decrement: Each click increments or decrements by +1 or -1, with step length/minimum/maximum/cycle settings, enabling frequency ±1Hz fine adjustment
• Button mutual exclusion: Multiple word setting buttons bound to the same register + multi-state indicator lights, enabling mutually exclusive mode selection
• Instant interaction: No state retention, releasing restores the default appearance;Pulse Write: Press to write A value, release to write B value (e.g., enable=1, disable=0)

2. Attribute Introduction

2.1 Function Settings

2.2 State setting

• Use gallery: Gallery when released/pressed, can be cropped
• Use text: Font/size/line spacing/label;Select state: Text content, color, alignment, blinking, and marquee for each state

3. Application case

3.1 Increment/decrement (with long press)

2 word setting buttons (increment/decrement) + numeric control. Write addressLW1000, step size 1, range 0~100, long press adjustment: hysteresis 500ms, interval 100ms - hold to continuously increment/decrement, release to stop.

3.2 Write constant + jog setting

4 buttons: write 100, write 200, write 300 (write constant), 1 button press 400/release 0 (jog setting). BindLW1001, numeric control observation: click 100 displays 100; click the button for 400, press displays 400, release returns to 0.

3.3 Button mutual exclusion (mode selection)

Classic scenario: 0-dining, 1-home, 2-away from home, 3-watching movies... 8 mode buttons are mutually exclusive. Method: 8 word setting buttons (write constants 0~7, bindLW1002) + 8 multi-state indicator lights (state transition table1;0;, display icon only when value matches). Which button is clicked, the corresponding light is on, and other lights are not displayed (background is exposed with unselected image).

Compiled from Guangzhou Dacai Technology VisualHMI development documentation (hmi-doc.gz-dc.com) configuration control tutorial "Word Setting Button", copyright belongs to Dacai Technology.