I want use S-code to change Spindle speed in my program,but It doesn't look like it's working

[Unicornai]

such as this,

X12.293460Z0.171288S50.123
X12.293463Z0.171177S50.234
X12.293466Z0.171052S50.456
X12.293470Z0.170915S50.678
X12.293474Z0.170765S50.789
X12.293479Z0.170602S51.123
X12.293484Z0.170426S52.123
X12.293490Z0.170237S53.123

[steve.milici]

The S{data} command causes Power PMAC to load the value in {data} into the local variable D53 for the coordinate system executing the program. It takes no other action, unless Coord[x].Sprog (default is zero) is set to a value greater than zero to specify a subprogram call on this command. If Coord[x].Sprog is set to a value greater than 0 when this command is executed, then after setting D53 to the value of {data}, the subprogram whose number is specified by Coord[x].Sprog is called. If the specified subprogram has a numeric jump label with a value 1000 times that of {data}, the subprogram execution will start at that label. If it does not have a jump label with this value, the subprogram execution will start at the top and the value in D53 could be used. This is distinct from S{data} information passed as part of a subroutine call through a read(S) command; in that form, the value is placed in local variable D19 for the coordinate system.

Which method are you implementing?