Programmable Logic Controller (PLC) Practice Test

Which item would not be classified as a data file in PLC terminology?

Status Data File Event

Correct Answer:

Status

Explanation:

Data files are the storage containers that hold values the PLC uses or records, organized to store data over time or for structured access. A data item like data, a file, or an event serves as a named storage area for values or events that the program can read or write. A status, however, is a live indication of the current condition or state of a device or process; it reflects what is happening right now rather than acting as a dedicated storage container. So while data, a file, and an event are types of data storage structures in PLCs, a status is simply the current state signal and not a data file.

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