Variables
For applications that require a parameter that is variable, the DMC-40x0 provides 510 variables. These variables
can be numbers or strings. A program can be written in which certain parameters, such as position or speed, are
defined as variables. The variables can later be assigned by the operator or determined by program calculations.
For example, a cut-to-length application may require that a cut length be variable.
Example:
posx=5000
Assigns the value of 5000 to the variable posx
PR posx
Assigns variable posx to PR command
JG rpmY*70
Assigns variable rpmY multiplied by 70 to JG command.
Programmable Variables
The DMC-40x0 allows the user to create up to 510 variables. Each variable is defined by a name which can be up to
eight characters. The name must start with an alphabetic character; however, numbers are permitted in the rest of
the name. Spaces are not permitted. Variable names should not be the same as DMC-40x0 instructions. For
example, PR is not a good choice for a variable name.
Note: It is generally a good idea to use lower-case variable names so there is no confusion between Galil
commands and variable names.
Examples of valid and invalid variable names are:
Valid Variable Names
posx
pos1
speedZ
Invalid Variable Names
RealLongName
; ‘Cannot have more than 8 characters
123
; ‘Cannot begin variable name with a number
speed Z
; ‘Cannot have spaces in the name
Assigning Values to Variables:
Assigned values can be numbers, internal variables and keywords, functions, controller parameters and strings.
The range for numeric variable values is 4 bytes of integer (231) followed by two bytes of fraction
(±2,147,483,647.9999).
Numeric values can be assigned to programmable variables using the equal sign.
Any valid DMC-40x0 function can be used to assign a value to a variable. For example, v1=@ABS[v2] or v2=@IN[1].
Arithmetic operations are also permitted.
To assign a string value, the string must be in quotations. String variables can contain up to six characters which
must be in quotation.
Examples:
posX=_TPX
Assigns returned value from TPX command to variable posx.
speed=5.75
Assigns value 5.75 to variable speed
input=@IN[2]
Assigns logical value of input 2 to variable input
v2=v1+v3*v4
Assigns the value of v1 plus v3 times v4 to the variable v2.
var=”CAT”
Assign the string, CAT, to var
MG var{S3}
Displays the variable var – (CAT)
Assigning Variable Values to Controller Parameters
Variable values may be assigned to controller parameters such as SP or PR.
PR v1
Assign v1 to PR command
Chapter 7 Application Programming ▫ 139
DMC-40x0 User Manual