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Programmable Logic Controllers

Programmable Logic Controllers. Mary Holleboom ENGR 315 Dec. 5, 2001. What is a PLC?. Automates a process, and can withstand an industrial environment CPU – processor, memory, power supply Input – sensors, contacts, buttons, relay switches Output – lights, motors, displays. CPU.

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Programmable Logic Controllers

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  1. Programmable Logic Controllers Mary Holleboom ENGR 315 Dec. 5, 2001

  2. What is a PLC? • Automates a process, and can withstand an industrial environment • CPU – processor, memory, power supply • Input – sensors, contacts, buttons, relay switches • Output – lights, motors, displays CPU I/O CARDS

  3. Automotive Industry Airport luggage transportation Power plants Examples

  4. Alternatives • Micro PLC • Less expensive • Smaller • Simple instruction set • Embedded control • Motion Controller • Continuous closed-loop control • Critical position of load or timing applications • PC • Sophisticated process control • Operator feedback • High processor speed • Low total system cost • Software Reliability

  5. Allen Bradley SLC 5/03 PLC Interface electronic display with cruise control assembly line Touch screen display for manual data entry CPU, I/O Personal Experience

  6. Future Developments • Smaller platform - AB CompactLogix 5320 • Ethernet connections • Stand alone - no PC • Portable PLC’s • PLC’s running schools and large homes

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