Siemens SINUMERIK 840D sl Programming Manual page 213

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If $P_IFRAME, $P_BFRAME or $P_PFRAME are changed, $P_ACTFRAME is recalculated.

$P_ACTFRAME corresponds to $P_BFRAME:$P_IFRAME:$P_PFRAME

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.

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Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0

6.1 Coordinate transformation via frame variables