Dropdown, Text Input & Numeric Input

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Three controls that write one tag each. For several values that belong together, use a Form instead.

All three read their current value from the value binding — bind it to the same tag as Write Tag — and write a local tag or a device tag. A failed write shows a Write failed notification. Writing needs the operator, editor or admin role.

Dropdown

Pick from a list; the choice is written immediately.

Setting	Description	Default
Write Tag	The local or device tag	none
Options (JSON)	List of {"label", "value"} objects	Option 1 = "1", Option 2 = "2"
Placeholder	Shown when the current value matches no option	"Select..."

Edit the options as JSON; the box is saved when you click out of it and only if the JSON is valid:

[
  { "label": "Product A — 500 ml", "value": "101" },
  { "label": "Product B — 1 L", "value": "102" },
  { "label": "Cleaning cycle", "value": "900" }
]

The current value selects the option whose value matches it as text. Choosing the placeholder writes an empty value.

Text Input

Setting	Description	Default
Write Tag	The local or device tag	none
Placeholder	Gray hint in the empty field	blank
Submit On	Enter key, Blur (leave field) or Both	Enter key

• The value is written only if you changed it.
• While you are typing, live updates do not overwrite your text. After a write the field follows the tag again.
• With Enter key, clicking away without pressing Enter leaves your text in the field unsent.

Numeric Input

A number box with − and + buttons.

Setting	Description	Default
Write Tag	The local or device tag	none
Minimum / Maximum	Values outside are clamped, without a message	no limit
Step	What − and + add or subtract	1
Unit	Shown inside the right end of the box	blank
Submit On	Enter key, Blur (leave field) or Both	Enter key

• − and + write immediately.
• Typed values are written on Enter or blur as chosen; text that is not a number is ignored.
• Clearing Minimum or Maximum removes that limit.

See also

• Form Widget
• Writing Tag Values & OPC-UA Exposure
• Slider Widget