Galil DMC-2X00 user manual Programmable Variables, Assigning Values to Variables

Programmable Variables

The DMC-2x00 allows the user to create up to 254 variables. Each variable is defines 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 can be upper or lowercase, or any combination. Variables are case sensitive; SPEEDC ≠ speedC. Variable names should not be the same as DMC-2x00 instructions. For example, PR is not a good choice for a variable name.

Examples of valid and invalid variable names are:

Valid Variable Names
POSA
pos1
speedC
Invalid Variable Names
REALLONGNAME	; Cannot have more than 8 characters
123	; Cannot begin variable name with a number
SPEED C	; 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-2x00 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.

Instruction	Interpretation
posA=_TPA	Assigns returned value from TPA command to variable posA
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

Assigning Variable Values to Controller Parameters

Variable values may be assigned to controller parameters such as GN or PR.

PR v1	Assign v1 to PR command
SP _VSS*2000	Assign _VSS*2000 to SP command

100 • Chapter 7 Application Programming DMC-2X00