Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 327)

Coordinate System Offsets
Chapter 11
11-11
There are 4 methods used to change the value of an external offset in the
work coordinate system table. Three methods can be found in the
following sections:
Manually alter the external offset value in the work coordinate system
table as described in section 3.3.1.
Alter the paramacro system parameter values 5201 - 5206 as discussed
in chapter 28.
Alter through some external means defined by the system installer’s
PAL program (refer to your PAL reference manual).
The fourth method, and the one discussed in this section, alters the external
system table through G10 programming. Changing these values in the
table using any of these methods does not cause axis motion; however, it
does immediately shift the active coordinate system by the amount entered.
The values entered into the external offset are added to the work coordinate
system zero point values each time a work coordinate system is called.
The format for altering the external offset using G10 is as follows:
G10L2P0X__Y__Z__;
Where : Is :
L2 tells the control that you want to alter the coordinate system tables.
P0 designates the external offset as the offset to update.
X_Y_Z_ specifies the location of the zero point of the specified work coordinate system
relative to machine coordinate system.
When this block is executed, the control will immediately shift the
currently active work coordinate system by the new external offset amount.
Example 11.4 and Figure 11.9 illustrate how the work coordinate system is
shifted using G10.
11.3.1
Altering External Offset
(G10L2)