Siemens SINUMERIK 828D Function Manual page 741

Parameterization
Frame suppressions SUPA, G153 and G53 lead to the WCS, SZS and possibly the BZS jumping when frame
suppression is active. This characteristic for position display and pre-defined position variables can be changed
through the following machine data:
MD24020 $MC_FRAME_SUPPRESS_MODE (Positions during frame suppression)
Bit Significance
0 Positions for display (BTSS) are without frame suppression.
1 Position variables are without frame suppression.
When the bit is set, the position for the display or the variables is calculated without frame suppression so that no
further jumps in the position occur.
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
K2: Axis Types, Coordinate Systems, Frames
10.5 Frames
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