Acu-Rite CNC 3500i User Manual

11 G-Code Edit, Help, & Advanced Features

Certain variables are set aside for the programmer to use. These may 
be useful when programming macros. You can read from or write to 
these variables. They are divided into four categories:



Local variables: #1 to #99:These variable numbers can be used only 
within the body of a sub-program (or macro). The 3500i generates 
an error message if you program these variables in the main 
program. Values do not hold from one sub-program to another. In 
this way, the same variables can be used in separate sub-programs, 
with different values.  



Common (global) variables: #100 to #219. (Read/Write):  These 
variables can be used anywhere in the program or sub-program and 
their value remains. 



Read only variables: #220 to #249:  These variables can only be set 
in the main program. Once set, the variables can be used in 
sub-programs or macros as "read only" variables. 



Static (global) variables: #260 to #279. (Read/Write):  These variables 
can be used anywhere in the program or sub-program and their 
value remains across shutdowns or software resets. 

OEM and machine tool builders should use #100-#150 
and #260-#269 for any custom macros. End users should 
use #151-#220 and #270-#279 for your custom macros. 
This avoids conflicting usage of the global variables.