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Convert MB to MI and vice versa

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I have a ladder program where i need to convert a MI to MB and after that convert part of that MB back to another MI.


I attached a picture of my ladder net, but it does not work.

I also tried to put MI to MB in one net and MB to MI in next net, but that also doesn't work.




Any ideas what could be a problem here?


Thank you,


Regards, Pawks

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Hi Pawks,


Use -(S)- for SB 170 and SB 171.


Does it works now?


If not - please share with us:

1.What PLC model do you use?

2.What is an O/S version (and other system files versions) at used PLC?

3.What is a U90Ladder version you use?


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