SLC 500- Need help understanding N106:[N7:10] in a MOV

Rob S.

Member
Join Date
Sep 2008
Location
Maryland
Posts
739
Good Afternoon ,

I'm sorry. But I'm struggling to understand this combination of integers
in this MOV , and really anywhere else this scheme is being used.

N106:[N7:10] - With your experience , what do you think is being done here ?

In the Data Files N7:10 has a 58 in it and N106:0 has 3038 ( If N106:0 is what it means )

Thanks so much for your help.


MOV

Source N106:[N7:10]
2605
Dest N106:100
2605
 
My understanding would be that it's moving N106:58 into the destination.

This looks to be what is happening to me as well. It is saying to move the contents of N106:58 into N106:100. Lots of reasons to do something like this. One example is to read and pack some values so that they can be transferred with a single read (like for the old serial PV Standard HMI's).
 
Last edited:
It's called "indirect addressing" whatever value is in N7:10 , 58 in your case means
N106:58 will be moved to N106:100. If the value in N7:10 is 1 then N106:1 will be moved to N106:100.
 
Thanks so much for your help. I'm better at creating my own program , then trying to figure , ok , why are they doing this , this way . With your help , it will give me a better perspective to look at it tomorrow.

Thanks again ,
 

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