hazemabdulrab
Member
I was having an issue where I would use the CPS instruction to copy a sint value to a string value( len=decimal , data= sint[82]) The data values in the string would get updated but the length value would stay at 0. Should't the length automatically update based on the values in the data values?
so I just decided to add a cps instruction that would copy the length value of the result data to the length value of the string im copying too
so I just decided to add a cps instruction that would copy the length value of the result data to the length value of the string im copying too
something I learned in the process, almost as a side note, is that you're generally better to use the COP rather than CPS instruction - the CPS uses a whole lot more headroom than the COP as it blocks all other processes and checks after execution to ensure the data didn't change while you were copying it. So CPS is good when you're dealing with produced/consumed tags or i/o from an fieldbus device, and you need to make sure that the remote device doesn't update your data halfway through the copy and turn your results into gibberish, but if you're just copying data within a program the COP will execute much faster and affect other processes less.
