Terminology; Analog Value- A; Digital Value - D; Figure 1 - Analog Value - Honeywell 2MLF-AV8A User Manual

1.3

Terminology

Analog value- A

The analog value of the physical measurement is continuously displayed as numerical
value. Since the analog value changes continuously, an instantaneous value is given as an
input. It could be a measurement of any physical parameter, such as voltage, current,
temperature, speed, pressure or flow.
For example, temperature could be changing continuously with respect to time, as shown
in Figure 1.
Since the changing temperature cannot be directly provide as an input to the A/D
converter, it needs to be converted into voltage using a transducer and then provided.

Digital value - D

In a digital electronic circuit, data is processed and saved in the form of numbers 0 and 1
only. The data is processed as a string of 0s and 1s. For example, ON and OFF signals
R200 Analog Input Module 2MLF-AV8A, AC8A User's Guide
September 2010
Figure 1 – Analog value
Figure 2 – Example of transducer
Honeywell
1. Introduction
1.3. Terminology
17