Siemens SINUMERIK 840D sl Programming Manual page 149

Meaning
ISFILE
<file name>
<result>
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
: Command for checking if the specified file exists in the passive file
system.
: Name of the file whose existence is to be checked in the passive file
system.
Type:
The following points should be noted when specifying the file name:
 The specified file name must not contain any blank spaces or control
characters (characters with ASCII code ≤ 32).
 The file name can be specified with path data and file identifier.
– Path data
Path data must be absolute, i.e. start with "/".
If a path is not specified, the file is searched for in the current
directory (= directory of selected program).
– File identifier
If the file name does not contain a domain identifier ("_N_"), it is
added accordingly.
If the fourth-last character of the file name is an underscore "_",
the next three characters will be interpreted as the file identifier.
In order to be able to use the same file name for all file
commands, e.g. via a STRING type variable, only the _SPF and
_MPF file identifiers may be used.
If there is no "_MPF" or "_SPF" identifier, the file name is
automatically completed with _MPF.
 The file name length can be up to 32 bytes, the path length up to 128
bytes.
Example:
"PROTFILE"
"_N_PROTFILE"
"_N_PROTFILE_MPF"
"/_N_MPF_DIR_/_N_PROTFILE_MPF/"
: Result variable to which the result of the check is assigned.
Type.
Value:
1.21 Check for presence of file (ISFILE)
STRING
BOOL
TRUE File exists
FALSE File does not exist
Flexible NC programming
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