Master/Slave networking configuration Alan Maynard Computer Electronic Networking

2 OUTLINE Motivation Introduction Problem statement Proposed Solution Results Conclusions Future Work

3 MOTIVATION After watching a special inside look on prisons I thought that I could make a PlC controlled based prison system Since I really enjoyed the PLC glass and never got the time to try my hand at plc networking this was the perfect time.

4 INTRODUCTION While watching the special I saw a guard who had to walk down the cells on manually open each door with a key so at an instant he was out numbered anywhere between 8 to 16 inmates. With some sort of automated system the guard could distance himself from the inmates.

5 PROBLEM STATEMENT Network two PLCs and Demostrate the master and slave configuration. Reduce the voltage to control a 5volt motor.

6 PROPOSED SOLUTION List steps taken to solve the problem such as: 1. Software (programming) 2. Networking (trail and error) 3. Assembly, building of the relay and gate to be controlled 4. Overall working conditions (does it all work together) In each step there were troubleshooting and testing in each step.

7 Proposed Solution Small annoyances – the PLC ladder program I was using did from time to time act weird. If you got a no response from processor message you had to reboot the system.

8 RESULTS A network of two PLC’s Master and Slave configuration Implantation of a network of PLC’s Master Video Slave Video

9 CONCLUSIONS This system could be used in other workplaces where security is a must. I learned how to network PLC’s How to use the master/slave configuration Use and wire relays

10 FUTURE WORK Security cameras Forward and reverse direction of the motor used to open and close the gate More PLC’s networked together.

11 Questions and Comments Questions ? Comments ? Contact me at Cell – (606)