Books on logic design using relays and timers?
Books on logic design using relays and timers?
(OP)
I have been unsuccessful in finding any books that describe the process of designing motor control ladder logic. I took several Digital Logic Design classes. Neither one included logic using the variety of contacts and timers available. Rather than reinventing the wheel, I'd like to read a book to get me started.
Thanks
Thanks





RE: Books on logic design using relays and timers?
Me thinks you are looking for the golden goose...
What EXACTLY are you looking to do/control/motor? So we might be able to help you further?
RE: Books on logic design using relays and timers?
Try Moeller. They used to have relay diagrams for common tasks like star/delta starters, Dahlander control, rotor control for hoisting devices and so on. Siemens has a book called "Schalten, Schützen, Verteilen in Niederspannungsnetzen". I know that it exists in English also - probably named "Switching, Protecting and Distribution in low voltage grids" or similar. It has lots of the stuff you are looking for - only that European ladders are horisontal, not vertical.
Gunnar Englund
www.gke.org
RE: Books on logic design using relays and timers?
So he's just talking about ladder logic that happens to have some motors involved? Strangely put.
RE: Books on logic design using relays and timers?
Ohhhh... do I feel old now!
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: Books on logic design using relays and timers?
Gunnar Englund
www.gke.org
RE: Books on logic design using relays and timers?
RE: Books on logic design using relays and timers?
Sorry I did not explain myself well the first time and thanks for the replies.
Antenna2001
RE: Books on logic design using relays and timers?
You might want to consider investing in a micro PLC for a couple of hundred dollars, and a few toggle switches and control relays and program your circuits from your digital logic in the PLC. Some PLCs actually talk boolean. This way you can simulate your circuits, test them, and then hard wire them according to your ladder diagram (avoid using Fancy Functions). You'll learn more hands-on than you would with a book. Books cannot show you where race circuits, feedbacks, infinite loops, and other real life physical traps in relay logic are.
I know somebody who did just that!
RE: Books on logic design using relays and timers?
http://www.cmhsoftware.com/
Don
RE: Books on logic design using relays and timers?
I remember learning "And"s "Or's, "Not"s etc. "GE Solid State Plug in Logic Modules", and hard wiring Boolean logic.
All with a ladder logic background.
I learned ladder logic mostly by using existing drawings. Some of my texts had a chapter on Ladder Logic, but I don't remember a text devoted soley to ladder logic. I had a couple of texts devoted to Boolean logic. Whenever I saw a usefull convention on another's drawing I would add it to my personal preferrences.
RE: Books on logic design using relays and timers?
RE: Books on logic design using relays and timers?
It includes sample cirucits for all types of motor control, including Multi-speed contactors/star-delta contactors/DOL contactors/Automated pump control.
It shows the motor wiring as well as the control wiring.
RE: Books on logic design using relays and timers?
I can understand how some computer logic teachers may pooh pooh wanting to do relay designs, but the logic approach should be the same.
Oh, asynchronous logic at first may seem to be harder than synchronous digital logic but the clock in synchronous logic merely quantizes time. You still have the same opportunities for race conditions and so forth.
After I had figured why the parts bin washer at 1 place had not worked for 20 years in automatic mode because a hole for a limit rod had been misdrilled, someone asked me if sticking in a programmable controller would have helped. I told him that they still would have had a case of Garbage In Garbage Out.
RE: Books on logic design using relays and timers?
RE: Books on logic design using relays and timers?
Here's agood book on relay logic and it includes a chapter on relay logic. The book was published aut 30 years ago by Westinghouse. There is also a chapter on The Westinghouse "Cypak" logic modules. They were plug-in modules that included "and", "nor" "or" gates etc. They only thing you could do before LCs.
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RE: Books on logic design using relays and timers?
RE: Books on logic design using relays and timers?
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