What are I missing?

poiuy

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• Nov 17, 2003

• #1

Can someone tell me why this ladder logic doesn't seem to work?

I can toggle each of the latching bits individually, but when I toggle the input bit, it doesnt energize the latching outputs.

 

Steve Bailey

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• Nov 17, 2003

• #2

Is it in a subroutine that isn't being called?

 

poiuy

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• Nov 17, 2003

• #3

Ah, right. I'm a college student (in case you didn't guess) and this is the first major project I've done on my own. I have to have a main ladder that just calls the other ladders, right? Does it matter which ladder number it is? I'm using a 5/01.

 

poiuy

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• Nov 17, 2003

• #4

Nevermind, thanks.

 

Steve Bailey

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• Nov 17, 2003

• #5

Your main ladder file is file 2. At this stage of your career, you'll save yourself a lot of headaches if you simply call all subroutine files from file 2.

The 5/01 will let you nest subroutines up to four levels (I think) deep. That is, ladder file 2 can call file 20, which can call file 12, which can call file 21, etc.

 

bob1371

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• Nov 18, 2003

• #6

Only 2oz's of Vodka to 8 oz's of orange juice?
AND YOU CALL YOURSELF A COLLEGE STUDENT

 

Last edited: Nov 18, 2003

poiuy

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• Nov 19, 2003

• #7

2 oz vodka to 6 oz OJ. I dont drink vodka, so I just guessed. My girlfriend is the screwdriver fan, vodka makes me sick.

 

J0k3r5

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• Nov 19, 2003

• #8

I'm not sure but If you build your ladder like me you do this

----|i:0/0|------------------------------------------(b3:0/0)

If this de case, you cannot toggle b3:0/0 because I:0/0 set it to off at each scan. You be able to toggle i:0/0.

 

bluegoose

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• Nov 19, 2003

• #9

English

 

Gary1

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• Nov 20, 2003

• #10

Hi Guys
A quick look. if you show the ladder correctly with the correct addresses.
The the bit you want to use to toggle the latch on is wrong their is NO B9 file in the processor file 9 is resueved for a routing table
they can be B3 or any file above file 9

 

poiuy

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• Nov 20, 2003

• #11

Hi Guys
A quick look. if you show the ladder correctly with the correct addresses.
The the bit you want to use to toggle the latch on is wrong their is NO B9 file in the processor file 9 is resueved for a routing table
they can be B3 or any file above file 9

Click to expand...

Sure about that? I created b9, so I know there is one, and the program is running fine. I forgot to make ladder 2 call the subroutines, that's all.

I'm not sure but If you build your ladder like me you do this

----|i:0/0|------------------------------------------(b3:0/0)

If this de case, you cannot toggle b3:0/0 because I:0/0 set it to off at each scan. You be able to toggle i:0/0.

Click to expand...

The input is from a panelview, so I didn't do that, although I've seen it done with discrete input modules. Should I do that for the panelview inputs? It seems redundant.

 

Kevin19

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• Nov 20, 2003

• #12

I use B:9 as my "output map" in every SLC program I run. I work with AB SLC 5/04s.