Reading and Writing Tags

Using the system functions, you can read from a tag and write to a tag in Ignition.

Reading from a tag

Reading a tag with scripting using a system.tag.read() function requires the tag path and will return a 'Qualified Value.' A qualified value is the tag value that has three attributes; Value, Quality, TimeStamp.

value = system.tag.read("tagPath").value
quality = system.tag.read("tagPath").quality
timestamp= system.tag.read("tagPath").timestamp

Writing to a tag

Writing to a tag with the system.tag.write() function requires the tag path and the value to write to the tag.

system.tag.write("tagPath","Hello World")