PLC Breif Introduction(Programmable Logic Controller)
Jun 13, 2025
PLC stands for Programmable Logic Controller.
It is a specialized industrial computer designed for automation control in manufacturing, machinery, and production lines.
PLCs are built to be rugged, reliable, and resistant to electrical noise, high temperatures, and vibration, making them suitable for harsh industrial environments.
They replace traditional relay control systems with programmable software, allowing users to modify logic and functions easily without rewiring hardware.
PLCs can perform many tasks, including:
- Logic and sequence control
- Timing and counting
- Analog processing (temperature, pressure, flow)
- Motion control
- Communication with inverters, touch screens, robots, and other equipment
They are widely used in automated assembly lines, packaging machines, food processing, injection molding, robotics, building automation, and many other industrial fields.
Mainstream Global PLC Brands
- Siemens (Germany)
- Rockwell / Allen‑Bradley (USA)
- Schneider Electric (France)
- Beckhoff (Germany)
- Mitsubishi (Japan)
- Omron (Japan)
- Panasonic (Japan)
- Keyence (Japan)
- Inovance (China)
- Delta (China)
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