Write Tag with Custom Property

Ignition
1

I have a custom property on a tag. Wondering if I would be able to change the value of this custom property using a script, and how I would go about doing so.

Something like system.tag.writeBlocking(['[default]pathToTag/tag/customINT])?

2

system.tag.writeBlocking(['[default]pathToTag/tag.customINT], [value])

Should work.

3

And reading, would .customINT be part of the qualified value or would it need to read separately in system.tag.readBlocking()?

So

custom, tag = [QV.value for QV in system.tag.readBlocking(['[default]pathToTag/Tag.customINT','[default]pathToTag/Tag'])]

or

tag_qv = system.tag.readBlocking(['[default]pathToTag/Tag'])]

tag_val = tag_qv.Value
tag_custom = tag_qv.customINT
4

Read separately.

Technically, you could read path/to/tag.jsonValues and get a rich document you can extract the value and custom property nodes from in one call, but I wouldn't both if you just want two values.

1 Like
5

If you really want to get fancy, maybe something like this:


def readWithProperties(path, *properties):
	props = ["value"]
	props.extend(properties)
	paths = ["path.{}".format(property) for property in props]
	return [QV.value for QV in system.tag.readBlocking(paths)]

tag, custom = readWithProperties("[default]pathToTag/Tag", "customINT")