Siemens SINUMERIK Commissioning Manual

Programming
2.7 Functions
Expanding the user interface
2-74 Commissioning Manual, 11/2006, 6FC5397-0DP10-0BA0
2.7.4 Check Variable (CVAR)
Description
You can use the CVAR (CheckVariable) function to run a scan to ascertain whether all or
only certain variables or Help variables in a screen form are error-free.
It may be useful to check if variables contain a valid value before an NC code with the GC
function. A variable is error-free if the state of the variable Identifier.vld = 1.
Programming
Syntax: CVAR( VarN )
Description: Checks variables for valid content
Parameters: VarN List of variables to be checked.
Up to 29 variables, each separated by a comma, can
be checked. A character length of 500 must not be
exceeded.
The result of the scan can be:
1 = TRUE (all variables have valid content)
0 = FALSE (at least one variable has invalid content)
Example
IF CVAR == TRUE ; Check all variables
VS8.SE = 1 ; If all variables are error-free, softkey VS8 is
visible
ELSE
VS8.SE = 2 ; If a variable has an invalid value, softkey VS8 is
disabled
ENDIF
IF CVAR(”VAR1”, ”VAR2”) ==
TRUE
; Check variables VAR1 and VAR2
DLGL ("VAR1 and VAR2 are
OK")
; If the values of VAR1 and VAR2 are error-free,
"VAR1 and VAR2 are OK" appears in the dialog line
ELSE
DLGL ("VAR1 and VAR2 are not OK")
; If the values of VAR1 and VAR2 are invalid, "VAR1
and VAR2 are not OK" appears in the dialog line
ENDIF

Siemens SINUMERIK Specifications

General

Brand	Siemens
Model	SINUMERIK
Category	Control Unit
Language	English