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This function is used in Python Scripting.
Reads the value of the Tags at the given paths. Will "block" until the read operation is complete or times out. Meaning, execution of the calling script will pause until this function finishes. This useful in cases where the tag read must complete before further lines in the same script should execute.
List tagPaths - A List of Tag paths to read from. If no property is specified in a path, the Value property is assumed.
Integer timeout - How long to wait in milliseconds before the read operation times out. This parameter is optional, and defaults to 45000 milliseconds if not specified. [optional]
List - A list of QualifiedValue objects corresponding to the Tag paths. Each qualified value will have three sub members: value, quality, and timestamp.
Gateway, Vision Client, Perspective Session
Code Snippet - Read From Multiple Tags
# Specify the paths
paths = [
# Send the reads off
values = system.tag.readBlocking(paths)
# Here we can examine each value
for i in range(len(values)):
print "Tag at Path: %s\n Had a value of %s" % (paths[i], values[i].value)