Siemens SINUMERIK 840D sl Commissioning Manual page 667

Variables
5.1 Defining variables
Variable value
The most basic property of a variable is its value.
The value of variables can be assigned by means of:
● Default settings when defining variables
● Assignment to a system or user variable
● A method
Programming
Syntax:
Description:
Parameters:
Example:
Variable status
The "Variable status" property can be used to scan a variable for valid content during
runtime. This property can be read and written with the value FALSE = 0.
Programming
Syntax:
Description:
Parameters:
Example:
SINUMERIK Integrate Run MyScreens (BE2)
Programming Manual, 03/2013, 6FC5397-1DP40-3BA1
Identifier.val = Variable value
Identifier = Variable value
Variable value val (value)
Identifier: Name of the variable
Variable value: Value of variable
VAR3 = VAR4 + SIN(VAR5)
VAR3.VAL = VAR4 + SIN(VAR5)
Identifier.vld
Variable status vld (validation)
Identifier: Name of the variable
The result of the scan can be:
FALSE = invalid value
TRUE = valid value
IF VAR1.VLD == FALSE
VAR1 = 84
ENDIF
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