HEIDENHAIN TNC 620 Programming Station

Programming Qparameters | Programming examples
9.13 Programming examples
Example: Rounding a value
The INT function truncates the decimal places.
In order for the control to round correctly, rather than simply
truncating the decimal places, add the value 0.5 to a positive
number. For a negative number you must subtract 0.5.
The control uses the SGN function to detect whether a number is
positive or negative.
0 BEGIN PGM ROUND MM
1 FN 0: Q1 = +34.789
First number to be rounded
2 FN 0: Q2 = +34.345
Second number to be rounded
3 FN 0: Q3 = -34.432
Third number to be rounded
4 ;
5 Q11 = INT (Q1 + 0.5 * SGN Q1)
Add the value 0.5 to Q1, then truncate the decimal places
6 Q12 = INT (Q2 + 0.5 * SGN Q2)
Add the value 0.5 to Q2, then truncate the decimal places
7 Q13 = INT (Q3 + 0.5 * SGN Q3)
Subtract the value 0.5 from Q3, then truncate the decimal
places
8 END PGM ROUND MM
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HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022
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