System Data; Resolutions - Siemens SINUMERIK 840Di sl Commissioning Manual

11.3

System data

11.3.1

Resolutions

Resolutions, e.g. resolutions of linear and angular positions, velocities, accelerations and
jerk, must be differentiated as follows:
● the input resolution, i.e. the input of data from the user interface or using the part
● the display resolution, i.e. the display of data on the user interface.
● the computational resolution, i.e. the internal representation of the data input through the
Input and display resolution
The input and display resolution is specified via the control panel being used, whereby the
display resolution of position values can be changed with MD9004
$MM_DISPLAY_RESOLUTION (display resolution).
MD9011 $MM_DISPLAY_RESOLUTION_INCH (INCH unit system display resolution) can be
used to configure the display resolution for position values with inch setting. This allows you
to display up to six decimal places with the inch setting.
For the programming of part programs, the input resolutions listed in the Programming
Manual apply.
Computational resolution
The computational resolution defines the maximum number of effective decimal places for all
data the physical unit of which is referred to a length or an angle, e.g. position values,
velocities, tool offsets, zero offsets, etc.
The desired computational resolution is defined using the machine data:
● MD10200 $MN_INT_INCR_PER_MM (computational resolution for linear positions)
● MD10210 $MN_INT_INCR_PER_ DEG (computational resolution for angular positions)
The default assignment is:
● 1000 increments/mm
● 1000 increments/degrees
The computational resolution thus also determines the maximum achievable precision for
positions and selected offsets. However, it is essential that the measuring system is adapted
to this degree of precision.
Note
Although the computational resolution is generally independent of the input/display
resolution, it should have at least the same resolution.
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
programs.
user interface or the part program.
NC Commissioning with HMI Advanced
11.3 System data
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