Siemens SINUMERIK 840D sl Programming Manual page 583

Assignments to R-parameters
Assignments to R-parameters in the table definition are reset after CTABEND.
Example:
Program code
...
R10=5 R11=20
...
CTABDEF
G1 X=10 Y=20 F1000
R10=R11+5
X=R10
CTABEND
...
Activating ASPLINE, BSPLINE, CSPLINE
If an ASPLINE, BSPLINE or CSPLINE is activated within a curve table definition CTABDEF ...
CTABEND, at least one starting point should be programmed before this spline activation.
Immediate activation after CTABDEF should be avoided, otherwise the spline will depend on
the current axis position before the curve table definition.
Example:
Program code
...
CTABDEF(Y,X,1,0)
X0 Y0
ASPLINE
X=5 Y=10
X10 Y40
...
CTABEND
Repeated use of curve tables
The functional relationship between the leading axis and the following axis calculated using
the curve table will be retained under the selected table number after the end of the part
program and POWER OFF if the table has been saved to the static NC memory (SRAM).
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
Comments
; R10=5
; R10=25
; R10=5
Axis couplings
9.2 Curve tables (CTAB)
583