Programmable logic controller. A specialized embedded computer built to survive harsh factory conditions, handle multiple inputs and outputs, and execute control logic in real time. Unlike standard PCs, they run deterministic operating systems ensuring exact timing for critical operations. They serve as the standard brain for automating assembly lines, conveyors, and standalone robotic work cells.
Heard on the job
The robot is waiting on a permissive signal from the PLC before it drops the part on the conveyor.
Insider tip
Ladder logic is still the most common programming language for these, largely because electricians and maintenance techs can read it like a wiring diagram.
Also heard as
- programmable logic controller