RSLogix 5000 BSL to Step7

[sledgehmr]

Hi all,

I am trying to convert RSLogix 5000 program to Step7. I need to bit shift left my array of double integers for tracking the product on a conveyor. I have to work on array[0..4] of DInt because the length of rows can be as long as 130bits.

Now in RSlogix 5000, I can load the value of source bit in new vacated places and enable shifts the left bits of array[0] onto right bits of array[1]. but this is not happening in step7. Can anyone show me what I am doing wrong?

 

[joseph_e2]

I remember working with a program in Simatic Manager (Step 7 Classic) where they jumped through a hoop or 2 for this.


Say the array is words A,B,C,D, with D being the least significant. They started with word A with a BSL, loading the most significant bit of word B into bit 0 of word A. Then repeated it until all 4 words were shifted and stuck the "new" bit into bit 0 of word D. Something like that...
I no longer have access to that software, so I can't look at it to refresh my memory.

 

[drbitboy]

What @joseph_e2 said.

I.e. Siemens ist Deutsch für "some assembly required."

That said, it's six to five and pick'em whether it would be faster to write your own custom FB or find one on Google. Perhaps there is one in the downloads area of this web site.