Fagor CNC 8070, Programming Manual, Page: 47 / 556

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Programming manual
CNC 8070
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1.5 Parameters, constants and expressions
Constants, parameters, variables and arithmetic expressions may be
used from ISO blocks as well as from special commands $ and #.
Constants
They are fixed values that cannot be modified by program; constants
are numbers in decimal system and read-only tables and variables
because their value cannot be changed within a program.
Variables
The CNC has a number of internal variables that may be accessed
from the user program, from the PLC or from the interface. Ver el
capítulo
"14 CNC variables" .
The user may create his own variables, as follows.
V.P.name - User variable local to the program.
V.P.name - User variable global to the program.
Arithmetic parameters
Parameters are general purpose variables that the user may utilize to
create his/her own programs. The CNC has global parameters
(accessible from the program or any subroutine) and local parameters
(accessible only from the program or subroutine where they have
been programmed) and common parameters (accessible from all the
channels).
The section on "1.5.1 Arithmetic parameters" in this chapter shows
how to work with parameters.
Operators
An operator is a symbol that indicates the mathematical or logic
operations to carry out.
The section on "1.5.2 Operators and functions" in this manual
shows a description of the various types of operators and functions
available.
Expressions
An expression is any valid combination of constants, parameters,
variables and operators.
The section on "1.5.3 Expressions" in this chapter shows how to
work with expressions