Siemens SINUMERIK 840D sl Programming Manual page 556

Work preparation
3.4 File and Program Management
Addressing files of an external program memory
Files of an external program memory not recorded as GDIR must be addressed in EES
notation. The drive name (e.g. "//DEV1:") must be specified at the start of the addressing path.
All symbolic device names configured in /user/sinumerik/hmi/cfg/logdrive.ini are permissible.
Example:
● EES notation: "//DEV1:/MyProgDir/pp1.xxx"
● NC notation: Not permissible
Addressing files of the global part program memory (GDIR)
When addressing files of the GDIR, in addition to specifying the path in the EES notation, it is
also permissible to specify the path in the NC notation.
Example:
● EES notation: "//DEV2:/MPF.DIR/PROG11.MPF"
● NC notation: "/_N_MPF_DIR/_N_PROG11_MPF"
Note
The addressing schemes for files of the GDIR in NC notation are converted internally into EES
notation in accordance with the following rules:
● The domain identification "_N_" in directory and file names is removed.
● If the fourth-last character in the directory or file name is an underscore ("_"), it will be
converted into a period (".").
Rules for the path specification
A complete path specification consists of drive name, directory path and file name.
Drive name
The following rules govern the specification of the drive name:
● All symbolic device names configured in /user/sinumerik/hmi/cfg/logdrive.ini are
permissible.
● The character "//" is at the beginning, followed by at least one letter or one digit.
● The following characters can be any combination of letters, digits, "_" and spaces.
● The name is ended with a letter or a digit, followed by a ":".
● Other special characters are not permitted.
Note
The drive name "//NC:" is predefined for the passive file system.
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Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming