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6 Programming the control
6.6
System data
Internal Calcula-
tion resolution
Display resolution
Limit values for
input and display
6-70
The internal calculation resolutions for the control are entered in MD 10200:
INT_INCR_PER_MM (calculation resolution for linear positions) and MD 10210:
INT_INCR_PER_DEG (calculation resolution for angular positions).
The default value for this machine data is "1000". The control thus calculates as
standard in 1/1000 mm or 1/1000 degrees. If greater accuracy is required, only
these two machine data need to be changed. It is useful to enter machine data
in powers of 10 (100, 1000, 10000). Rounding if required (and thus also
falsification) of the internal values can only be achieved using smaller units.
However, it is essential that the measuring system is adapted to this degree of
accuracy. The internal calculation resolution also determines the accuracy with
which positions and selected compensation functions are calculated. Changes
to the MD have no influence on the velocities and cycle times which can be
attained.
The number of decimal places for the position values on the front operating
panel should be set in MD 9004: DISPLAY_RESOLUTION.
The limits placed on input values depends on the display option and on the
input options on the front operating panel.
This limit is reached at 10 digit positions plus decimal point plus sign.
Reference material
/FB1/ G2, Basic machine functions manual,
Section "Input/display resolution, calculation resolution"
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
© Siemens AG 2006 All Rights Reserved
03/2006
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