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 CPUI/O CARDS

3. Examples Automotive Industry Airport luggage transportation Power plants

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. 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

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