Which tag type is not permitted for an IDAS data source?

The correct understanding here revolves around the fact that IDAS (Industrial Data Acquisition System) primarily supports specific tag types for data sources to ensure compatibility and efficiency in data handling and processing. In the context of IDAS, Boolean type tags are typically not supported because they represent a binary state, which might not align with the continuous data or more complex data types that are generally favored in data acquisition systems.

On the other hand, tag types such as Integer, String, and Float are permitted as they provide the necessary flexibility to represent a wide range of data values. Integers can denote counts or indices, Strings can capture textual or character-based data, and Floats are effective for representing measurements or continuous values with decimals. These types facilitate varied applications across different industrial environments, allowing comprehensive data collection and analysis.

Thus, since Boolean tags do not fit into the broader requirements or use cases typically encountered within an IDAS data source, they are not permitted. This distinction is crucial for users to understand when setting up or maintaining data acquisition systems, as the choice of tag types directly impacts operational efficiency and data reliability.