Hi fedex03,

Because all of the values on the right side of your formula are integers, the result will also be an integer. To get a float value, use 65535.0 instead of 65535.

Kind regards
Stefan

Hello fedex,

#"Analog Value" := (UDINT_TO_REAL(#"Digital Value") * UDINT_TO_REAL(#"Uooer Range")) / 65535.0;

without explicit conversion the calculation is done in UDINT and then the result without decimals is written to the REAL result. 

Regards,

Frink

Hi fedex03,

fedex03

is there a way to round the output to two decimal point?

This is better done on the HMI or whatever system you are using to display the value.

Or you try the following:

#"Analog Value" := ((100 * #"Digital Value" * #"Upper Range") / 6553500) / 100.0;

Kind regards
Stefan

You can use a combination of what's already been posted and the ROUND instruction.

Multiply by 100.0, ROUND result, then Divide by 100.0.

However, if you want it to be an INTEGER with 2 implied decimal (the point, not the comma) places, you can convert the INT to DINT, Multiply 100, then convert to REAL, then ROUND the converted real, Divide by 100.0, and finally, convert the REAL back to INTEGER.

VAR TEMP
  SomeInt : Int
  SomeReal.00 : Real
END VAR

BEGIN
  #"SomeReal.00" := ROUND(DINT_TO_REAL(INT_TO_DINT(#SomeInt) * 100)) / 100.0;  
END

fedex03

Hi Frink,

is there a way to round the output to two devimal point?

Thank ypou very much for your time.