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PLC
A PLC is a rugged industrial computer that reads inputs, runs programmed control logic and operates outputs such as motors, valves, alarms and machine sequences.
SIMPLE EXPLANATION
Programmable Logic Controller in context
A PLC repeatedly scans its inputs, executes its programmed logic and updates outputs. It can also exchange selected data with HMIs, SCADA systems, gateways and other controllers.
Example
On a packaging line, a PLC can read a photoelectric sensor, coordinate conveyors and stop the machine when a safety condition is detected.
COMMON QUESTIONS
Frequently asked questions
What is PLC?
A PLC is a rugged industrial computer that reads inputs, runs programmed control logic and operates outputs such as motors, valves, alarms and machine sequences.
How does PLC work?
A PLC repeatedly scans its inputs, executes its programmed logic and updates outputs. It can also exchange selected data with HMIs, SCADA systems, gateways and other controllers.
When is PLC used?
On a packaging line, a PLC can read a photoelectric sensor, coordinate conveyors and stop the machine when a safety condition is detected.
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