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Old June 12th, 2019, 01:27 PM   #31
geniusintraining
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Quote:
Originally Posted by g.mccormick View Post
So do you use the terms "cut it on" and "cut it off" instead of turn on and turn off?
Boy.... this here tread could take a turn for the worse'n if we gunna go down dat dare roads, stick wit me and I will learn ya somtin
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Old June 12th, 2019, 01:42 PM   #32
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Old June 12th, 2019, 04:59 PM   #33
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Quote:
Originally Posted by geniusintraining View Post
Boy.... this here tread could take a turn for the worse'n if we gunna go down dat dare roads, stick wit me and I will learn ya somtin
OK I think this thread gave me the answers I needed so let's go there. Why do we say "Cut on the lights"?
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Old June 12th, 2019, 05:06 PM   #34
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Because early light switches were Knife Switches.
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Old June 12th, 2019, 05:09 PM   #35
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Oh legacy problems, same as the PLC instructions
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Old June 12th, 2019, 05:42 PM   #36
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Ain't chew got no lurnin?
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Old June 12th, 2019, 05:45 PM   #37
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and operators down here don't "press" a button - they "mash" the button instead ...
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Old June 13th, 2019, 04:02 AM   #38
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Hold my beer, I'm fixen' to learn you somthin!
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Old June 13th, 2019, 05:37 AM   #39
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To quote a Shakespeare play "To be or not to be that is the question" or in this case to be open or not closed"
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Old June 13th, 2019, 05:54 AM   #40
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Quote:
Originally Posted by Ron Beaufort View Post
and operators down here don't "press" a button - they "mash" the button instead ...
Now you be talk'in Ron.... we also love to eat mash, mash a object or last night I got mashed, its a great word and can be used for anything
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Old June 13th, 2019, 07:11 AM   #41
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Getting back to the original gist of this thread, I believe that young programmers-to-be are not starting with the basics. They want to jump right into programming when really they should be actually be wiring on actual real world relays, PBS, and limit switches.

IMO, this would help with understanding NO & NC contact terminology.

Of all of the naming suggestions, XIC, XIO, Examine On, & Examine Off have to be the most confusing. Yuck!!
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Old June 13th, 2019, 02:50 PM   #42
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I like to point at a ] [ and say, "if that's on" and point to a parallel ]/[ and say "or that's not on"
On to me means logical 1.
I went to SC back in my uni days and the accents and vernacular were quite pleasant.
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Old June 13th, 2019, 03:25 PM   #43
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In regards to XIO and XIC....
If I am not examining the contact is it still working?

I still think "Normally Open" and "Normally Closed" should be the standard. Just seems to make more sense.....
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Old June 13th, 2019, 03:53 PM   #44
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The symbol IS EQUIVALENT to a Normally Open electrical contact.


there are only 10 types of people...those who understand binary, and those who don't.
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Old June 13th, 2019, 07:18 PM   #45
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Quote:
Originally Posted by jaden View Post
Normally Open and Normally closed define the state of relay contacts when the coil is not energized or sitting out on a table top. PLC "ladder" logic was meant to represent Relay Ladder symbology. If it is followed through, it is all consistent.


Quote:
Originally Posted by ivo.maenen View Post
So if I wire a NC-stop-pushbutton to an input and a NO-start pushbutton


being consistent means you would program something like (I do not use the seal-contact!):


STOP START motor

--|/|----| |----( )


Thats not logical to me.....


Of course, a pushbutton is not a relay though, is it?
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