Reading Tag Names

Ignition
1

Hi!

I am looking to be able to read the name of a tag if its value meets a condition:

Taglist = [
		"Tag 1",
		"Tag 2",
		"Tag 3",
		"Tag 4"
	]
Tag_path2 = [
		"Tag 1",
		"Tag 2",
		"Tag 3",
		"Tag 4"
	]

Tag_Read= system.tag.readBlocking(Taglist)
Tag2_Read= system.tag.readBlocking(tag_path2)
for i in range(len(Taglist)):
	mode = Tag_read[i].value
	name = Tag_read[i].name
	split = name.split()
	fixedname = split[1]
	if mode == "OPEN":
		Thing += Thing1 + Thing2 
		comparator= system.tag.readBlocking(tag_path2) 
		for j in range(len(tag_path2)):
			linetk = comparator[j].value 
			line = comparator[j].name
			linesplit = line.split()
			runline = linesplit[0] + linesplit[1]
			if fixedname == linetk:

Obviously you can''t do system.tag.read the name component of a tag. Is there any other way of reading a name of a tag, so you can use it in comparisons? Any help would be appreciated, thanks!

2

Perhaps I'm misunderstanding your intent, but since you're iterating over a range equivalent to len(TagList), couldn't you just access the tag name (tag path) in your original list? With

name = Taglist[i]
1 Like
3

You could also zip these like:

for qualVal, tagPath in zip(Tag_Read, Taglist):
    mode = qualVal.value
    name = tagPath
4

There's a lot of things that might "work" but are definitely not ideal about the code you've written.

Can you take a step back and describe what you're trying to do in more detail? Where are you running this script/what is it reacting to, what do you want it to do, how often do you want it to run, that kind of thing.

1 Like
5

You might be able to use the Tag Report Tool to generate a script for this. Simply add a Tag Path filter and add a property condition to match with what you want.

image
image1126×850 37.8 KB

Then you can Copy as Scipt to have something like the following

provider = 'default'
limit = 100

query = {
  "options": {
    "includeUdtMembers": True,
    "includeUdtDefinitions": False
  },
  "condition": {
    "path": "*tag*",
    "attributes": {
      "values": [],
      "requireAll": True
    },
    "properties": {
      "and": [
        [
          "value",
          "Equal",
          "[1, Good, Wed Sep 25 13:38:13 MST 2024 (1727296693093)]"
        ]
      ]
    }
  },
  "returnProperties": [
    "name",
    "tagType",
    "quality"
  ]
}

# Limited to 100 rows. Use continuationPoint functionality to continue from last result, 
# or remove limit for full results.
results = system.tag.query(provider, query, limit)

Adjust if needed. The default limit is 100.
Then you can extract the tag names from the results output

6

The best way that found to pull the name from a tag is by parsing the value by "/". Then only have it only return the last part of your path.

2 Likes
7

To explicitly state it:

tagPath = '[default]this/is/my/tag'
tagPath.split('/')[-1]
3 Likes
8

This gives you the .value, not the tag path.

9

Nevermind, this worked, thank you!