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

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Presentation transcript:

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 CPUI/O CARDS

Examples Automotive Industry Airport luggage transportation Power plants

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 

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

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