Flip Flop T. Probably sourcecode issue in codesys

2022-01-11T09:58:47.006000Z

An other ladder example of FF using xor.
Programming in ST create a FF is very easy 😊
Ti saluto ancora, ciao

Flip Flop T. Probably sourcecode issue in codesys

2022-01-11T09:37:20.385000Z

Hi Fabrizio,
looking just a bit of your code, I think the set of u1 is done from w1 but on the branch below reset is done, so the result is zero.
if you place a contact false on the branch below, you see the set of u1.
I leave you an example of flip flop in ladder, hope this can help you.
Ciao.

Flip Flop T. Probably sourcecode issue in codesys

2022-01-09T10:55:56.377000Z

Hi,

1) There are several bi-stable functions implemented in Standard lib(!)
* SR (SR FF)
* RS (RS FF)
2) For well implemented ladder patterns I suggest you take a look at
* https://forge.codesys.com/prj/designpatterns/home/Home/#patterns-of-ladder-logic-programming

Flip Flop T. Probably sourcecode issue in codesys

2022-01-09T09:34:33.879000Z

In image two equivalent scheme of Flip Flop Toggle

In the upper image:
Sending pulse on "in1" i can't obtain set of "u1" if i prepare "u1=1" sending pulse return it to 0

In the lower image:
Sending pulse on "in1" i can't obtain reset of "u1" if i prepare "u1=0" sending pulse return it to 1

I hope i'm wronging.

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