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ladder diagrams? #54025
07/14/05 09:18 AM
07/14/05 09:18 AM
Jps1006  Offline OP
Joined: Jan 2004
Posts: 615
Northern IL
I think that's what it's called, ladder diagram. You know, the control wiring schematic that has the numbered lines down the one side and has each switch, load, etc. called out, and then referenced to the line number that shows another diagram.

Well, can someone explain how these are supposed to be read? It was explained to me once very quickly, and I have muddled my way through troubleshooting with one before, but I have a hard time seeing how what is on paper really relates to what I am looking at. Even a link or recommended book would be helpful.

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Re: ladder diagrams? #54026
07/14/05 11:48 AM
07/14/05 11:48 AM
NJwirenut  Offline
Joined: Sep 2001
Posts: 806
Bergen County, NJ

Re: ladder diagrams? #54027
07/14/05 02:15 PM
07/14/05 02:15 PM
rad74ss  Offline
Joined: Apr 2004
Posts: 156
Pryor, OK USA
I sent a PDF document direct to you. It may take a while due to my spam filter. Keep in mind that the drafting program has a lot to do with the layout and numbering systems. Logic diagrams (like PLC logic) are a whole nother animal.

Flow is left to right. Contacts are usually shown in the de-energized position.

Re: ladder diagrams? #54028
07/15/05 03:02 AM
07/15/05 03:02 AM
mxslick  Offline
Joined: Oct 2004
Posts: 803
Atomic City, ID USA
Excellent link, NJwirenut!!

Stupid should be painful.
Re: ladder diagrams? #54029
07/16/05 07:47 AM
07/16/05 07:47 AM
Trumpy  Offline

Joined: Jul 2002
Posts: 8,236
SI,New Zealand
Good on ya Kenny!. [Linked Image]
Great link!. [Linked Image]

Re: ladder diagrams? #54030
07/19/05 08:52 PM
07/19/05 08:52 PM
Jps1006  Offline OP
Joined: Jan 2004
Posts: 615
Northern IL
Hey guys, thanks for the replies. I just got back from vacation and have a ton of catch up, but am going to check out NJ's link a bit more carefully when I get a chance and Rad, I got your Email, thanks. Be expecting a few Q's as I browse over your example. Thanks again


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