Which term describes a point existing only in software and not in hard-wired hardware?

• A. Flow switch
• B. Accumulator
• C. Digital output
• D. Pseudopoint

Answer: (D)

In direct digital control, a point that exists only in software and has no physical hardware behind it is called a pseudopoint. These live entirely in the control program to hold computed values, simulate inputs, or support logic without tying to a real sensor or actuator. A flow switch is a real sensor that detects flow and sends a signal, while a digital output is a real hardware output channel that drives actuators. An accumulator represents a stored value used by the controller, typically tied to the program’s memory or hardware for keeping a running total; it isn’t a purely software-only construct. So, the term that best describes a software-only point is pseudopoint.