Plc programming – Lenze ETC Motion Control User Manual
Page 384
PLC programming
Library
FILE IO functions
8.8
8.8.3
l
384
EDSTCXN EN 2.0
8.8.3.3
SetCurrentPath
FUNCTION SetCurrentPath: DINT
VAR_INPUT
path_s
: STRING(40);
(* device name and path *)
END_VAR
Defines the actual default drive and the directory path for the file IO
functions of the device drivers (
¶ 390). With the directory path the IP
address of the CNC data server (network disk) can be defined.
Return value: The function returns an error code (
¶ 391).
SetCurrentPath(’ND:172.16.5.66’);
8.8.3.4
SYSOPENFILE
FUNCTION SYSOPENFILE : DINT
VAR_INPUT
filename_s
: STRING(15);
accessmode_di
: DINT;
END_VAR
The function is used to open a file on the defined device (
a file handle which is required for the functions SysReadFile() and
SysWriteFile(). A total of 4 files can be opened simultaneously.
filename_s:
Name of the file to be opened. Optionally with preceding device ID and
colon.
accessmode_di:
Access mode O_RDONLY or O_WRONLY (defined in gobal constants)
Return value: file handle (greater or equal to 0 if successful, less than 0 in
case of an error (
¶ 391).
handle_di
: DINT;
handle_di
:= SYSOPENFILE(’RD:data.dat’, O_RDONLY);
Declaration
Description
Example
Declaration
Description
Parameters
Example