Specifying Path Information for Files

Files that are created by the system, a program or by user activities are saved to a default folder designated depending on the file extension. If you prefer, you can specify a path for files you want to create as illustrated in the following examples for a *.csv file that is to be created on an M262 Logic or Motion Controller.

Input path information in the function block	Example	Location in the file system of the controller	Comment
File name without path information	'MyFile.csv'	Protected system folder, not visible	Avoid saving the file without path information because this leads to evaluation of the file extension and redirection of the file when a system rule is defined.
File name with relative path	'usr/MyFile.csv'	/usr/usr/MyFile.csv	The file is created according to the path information but relative to the default root directory⁽¹⁾. In this example, the default root directory is /usr/.
File name with absolute path	'./MyFile.csv'	/usr/MyFile.csv	The file is created in the default root directory⁽¹⁾. In this example, the default root directory is /usr/.
File name with absolute path to a specific root directory	'/sd0/MyFile.csv'	/sd0/MyFile.csv	Use this option for an external memory⁽²⁾.
(1) Consult the Programming Guide specific to your controller for information about the specifier of the default root directory. (2) Consult the Programming Guide specific to your controller for information about the specifier of the root directory for an external memory.

Access restrictions apply to certain folders created and used by the system. If a file operation is not permitted, the function block outputs an error message.