Siemens Sinumerik 840D sl Programming Manual page 295

Basic frame and settable frame are effective after Reset if MD 20110 RESET_MODE_MASK
is set as follows:
Bit0=1, bit14=1 --> $P_UBFR (basic frame) acts
Bit0=1, bit5=1 --> $P_UIFR [$P_UIFRNUM](settable frame) acts
Predefined settable frames $P_UBFR
The basic frame is programmed with $P_UBFR, but it is not simultaneously active in the parts
program. The basic frame programmed with $P_UBFR is included in the calculation if
• Reset was activated and bits 0 and 14 are set in MD RESET_MODE_MASK and
• the statements G500,G54...G599 were executed.
Predefined settable frames $P_UIFR[n]
The predefined frame variable $P_UIFR[n] can be used to read or write the settable zero
offsets G54 to G599 from the parts program.
These variables produce a one-dimensional array of type FRAME called $P_UIFR[n].
Job planning
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
Coordinate transformation (FRAMES)
5.1 Coordinate transformation via frame variables
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