Specifications

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CONCISE GUIDE FANUC 85

5.0 SUB-PROGRAMS / PARAMETRIC PROGRAMMING

Sub-programs are useful to repeat the same operation several times, using inside the program the same

functions and co-ordinates already known to the operator

With parametric programming, variable values (parameters or variables #) can be attributed to the

program codes instead of fixed values (numeric values). A value can be assigned to a variable through

the program, from the MDI window, or inserting it in the variables table.

A variable is programmed with address # followed by a number

5.1 “M98” “M99” USE OF SUB-PROGRAMS

A program can be divided into main program and sub-programs.

Usually the NC operates under the control of the main program, but when an instruction is found that calls

up a sub-program the control passes over to the sub-program. When an instruction to return to the main

program is found, the control returns to the main program.

Sub-programs can be used when there are fixed repetitive sequences, simplifying the programming. A

sub-program can be called up by the main program. A sub-program that has been called can, in its turn,

call up another sub-program. Sub-program call-ups can be nested in up to four levels, as shown on the