Siemens Sorting Routine

[jburda]

I have an application where I read 10 pressure readings from 10 diff pressure transmitters. When commanded to do so, I need to get my values, sort the list based on highest to lowest, and set bits based on which transmitter had the highest reading.

I have developed a function block to do the sorting that is cumbersome and was looking for a better way to do this.

 

[jacekd]

Share your solution with us then I believe that many of us will give you comments or push you in right direction.

 

[Werner]

If it is just necessary to take action on the highest value just work youre way through the list and remember the location of the highest value. (It is not a lot of data so complex datastructures to speed up the search are unneccacery) I'll give an example in basic.

item_nr=0
largets_found_so_far=0




For nr=1 to Nr_of items

if list[nr]>largest_found_so_far then

largest_found_so_far = list[nr]


Item_nr = nr


​

end if




​

next nr



''Action based on highest reading
..
..

What to do with two exactly the same values?

For Siemens you will need to use pointers to make this happen. Or a just make a number of compare's.

 

[Amr Hassan]

i did not try it but i would think in this way

• create a table in a data block

• put the first reading in the table using att function from the ti lib

• for the rest of the readings use the cdt function to locate the first value equal than or grater than the reading (2-10)
• if the returned index value is within the table then this value is grater than the values in the table , in this case use the function iblokmov to move the table down , then add the value in the empty space (u need to use indirect addressing to locate it)
• if the return value is not within the table then add the value to the table using att

it is pretty complicated , please send me the result if u success in this way or another