S7 programming question

a changed somethinh in an existing program
I transfer a result of FB16 to DB75.DBD80

when i use status variable on this double data word i have the resukt in dec 118950 which is correct.


the problem is :
in DB 75 i declarated 80.0 as real
when monotoring al values show the result but the 80.0 remaines 0
What did i do wrong ?

Nothing is wrong, it's just that 118950 decimal is not valid as a floating point number so the DB editor can't show you a value. Instead it shows 0.0000e+000 (rather than 0.0). Try monitoring the value in a VAT table as floating point - the VAT table will show the value as a double word, again because it is not a valid floating point number.

ok ! But can an application like scada use this DB to read the value ?

Yes.