Boolean values from modicon OPC UA PLC are logged in historian core strangely

[Matrix_Engineering]

Welcome!

Some further insight for you:

I’m trying to understand the recommended best practices for configuring Ignition Tag History, specifically how the following pieces are intended to work together:

• Tag Group (normal execution rate) • Historical Tag Group (e.g. Default Historical) • Sample Mode (Tag Group vs On Change vs Periodic) • Deadband Style (Auto vs Analog vs Discrete) I understand that the Tag Group controls how often the tag is evaluated/read, while the Historical Tag Group controls how often the historian evaluates whether a sample should be stored. However, it’s not entirely clear when it is best to reuse existing tag groups versus creating a dedicated Historical Tag Group,…