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

NCK start-up

10.2 System data

10.2 System data
10.2.1

Resolutions

The following types of resolution, e.g. resolution 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 parts
● 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 machine data:MD9004
DISPLAY_RESOLUTION.
MD9011 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 parts programs, the input resolutions listed in the Programming
Guide 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 INT_INCR_PER_MM (computational resolution for linear positions)
● MD10210 INT_INCR_PER_DEG (computational resolution for angle 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.
102
programs.
user interface or the parts program.
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
IBN CNC: NCK, PLC, drive