Siemens SINUMERIK 840D sl Commissioning Manual page 103

Rounding
The precision of angle and linear positions is limited to the computational resolution by
rounding the product of the programmed value with the computational resolution to an
integer number.
Example of rounding:
Computational resolution: 1000 increments/mm
Programmed path: 97.3786 mm
Effective value = 97.379 mm
Note
To keep rounding easily understandable, it is better to use powers of 10 for the
computational resolution (100, 1000, 10,000).
Display resolution
In MD9004 DISPLAY_RESOLUTION (display resolution), you can set the number of decimal
places after the decimal point for the position values on the operator panel.
Input and display limit values
Limitation of the input values depends on the display features and on the input options on
the operator panel. The limit is ten digits plus comma and sign.
Example of programming in the
All the linear axes of a machine are to be programmed and traversed within the range of
values 0.1 to 1000 mm.
In order to position accurately to 0.1 μm, the computational resolution must be set to ≥ 10
incr./mm.
MD10200 INT_INCR_PER_MM = 10000 [incr./mm]:
Example of related parts program:
N20 G0 X 10000 Y 10000
;Axes move to position X=10000 mm, Y=10000 mm
N25 G0 X 50002 Y 20003
;Axes move to position X=50002 mm, Y=20003 mm
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
/ - μm range:
1
10
NCK start-up
10.2 System data
4
103