In the previous article, we built a complete digital I/O architecture.
Digital signals are relatively simple:
0 = OFF
1 = ON
Analog signals are different.
An analog input may represent:
Tank level
Pressure
Temperature
Flow
Speed
Weight
pH
Conductivity
Valve position
Motor current
Instead of …
Read MoreIn industrial automation, not every signal is simply ON or OFF.
Some devices need to send a real measurement to the PLC.
Examples:
Pressure = 72.5 PSITank Level = 63%Temperature = 180°FFlow = …
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