Siemens SINUMERIK 840Di Function Manual page 794

Detailed Description
2.4 Frames
A value = 0 means that the axis is not mirrored and a value = 1 means that the axis will
always be mirrored, irrespective of whether it has already been mirrored or not.
$P_NCBFR[0,x,mi] = 1
$P_NCBFR[0,x,mi] = 0
Axial replacement G58, G59
The translation component of the programmable frame is split into an absolute component
and a component for the total of all additively programmed translations. The absolute
component can be changed using TRANS, CTRANS or by writing the translation components,
in which the additive component is set to zero. G58 changes only the absolute translation
component for the specified axis; the total of additively programmed translations is retained.
G58 X... Y... Z... A... ...
G59 is used for axial overwriting of the additively programmed translations for the specified
axes, which were programmed with ATRANS.
G59 X... Y... Z... A... ...
Example:
TRANS X10 Y10 Z10
ATRANS X5 Y5
G58 X20
G59 X10 Y10
G58 and G59 can only be used if machine data
MD24000 $MC_FRAME_ADD_COMPONENTS
is set to TRUE, otherwise the alarm "18311 channel %1 block %2 frame: instruction not
permissible" is output.
The function can also only be used in conjunction with a configured fine offset for the
programmable frame. If G58 or G59 is used without a configured fine offset, alarm "18312
channel %1 block %2 frame: Fine offset not configured" is output.
The absolute component of the translation is stored in the rough offset component and the
additive translation component is stored in the fine offset component. To this end, the
programmable frame or the fine offset is expanded.
2-64
; X axis is always mirrored.
; X axis mirror is OFF.
; Total translations X15 Y15 Z10
; Total translations X25 Y15 Z10
; Total translations X30 Y20 Z10
Axis Types, Coordinate Systems, Frames (K2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0