Master/Slave networking configuration

Alan MaynardComputer Electronic

Networking

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OUTLINE

Motivation Introduction Problem statement Proposed Solution Results Conclusions Future Work

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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.

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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.

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PROBLEM STATEMENT

Network two PLCs and Demostrate the master and slave configuration.

Reduce the voltage to control a 5volt motor.

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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 controlled4. Overall working conditions (does it all work

together) In each step there were troubleshooting

and testing in each step.

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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.

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RESULTS A network of two

PLC’s Master and Slave

configuration Implantation of a

network of PLC’s

Master Video

Slave Video

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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

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FUTURE WORK Security cameras Forward and

reverse direction of the motor used to open and close the gate

More PLC’s networked together.

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Questions and Comments

Questions ? Comments ? Contact me at

alan36chambers@hotmail.com Cell – (606)434-4746