Adding Float Values

Ignition
1

I need some help figuring out why I can't add +0.0001. My script works fine when i am working in the 3rd decimal place but if I do anything more than that the script doesn't work.

Screenshot 2025-01-20 144905
Screenshot 2025-01-20 1449051005×758 107 KB

Screenshot 2025-01-20 145107
Screenshot 2025-01-20 145107928×691 86.8 KB

2

I believe you need to change the deadband.

3

what should i change it to?

4

Does your tag have a starting value? if the tag is Null it might be having a hard time starting.

5

Try changing it to half of the minimum change you want to detect, so 0.00005.

Tips:

  • tagValue += 0.0001 syntax works in Python.
  • system.tag.writeBlocking expects lists for both the paths and arguements (although it still works with a string when there's only one - for backward compatibility) so,
    path = ["[tags2]11E211/Entry0"]
    tagValue = system.tag.readBlocking(path)[0].value

    tagValue += 0.0001

    system.tag.writeBlocking(path, [tagValue])

NP209's comment is right. Your tag definition value is blank.