Advantech ADAM-5000 - Manual (Page 52)

Chapter 4
4-29
Getting the Totalizer Value
If users want to get the actual counter value, a formula such as follows
can facilitate an easy calculation from the initial counter value, overflow
value and current counter value:
V
tol =
{|V
ini
- V
min (or
V
max)
|+ 1} x |V
vf
| + |V
ini
- V
cur
|
V
tol : totalizer value
V
ini : initial counter value
V
min : min. couner value = 0 (fixed value)
V
max : max. counter value = 2 32 = 4,294,967,295 (fixed value)
V
vf : overflow value
V
cur : current counter value
Example:
If the initial value =10, overflow value =4, min. value = 0, current
counter value = 3, the totalizer value could be calculated as
Totalizer value = {|10 - 0| + 1} x| 4 |+ |10 -3| = 51