FileOpenW
Function Block - Create or reset a file and open it for writing.
Inputs
|
Input |
Data Type |
Range |
Unit |
Default |
Description |
|---|---|---|---|---|---|
|
Execute |
BOOL |
0 to 1 |
N/A |
No default |
On the rising edge, request to open a file. |
|
Path |
STRING |
N/A |
N/A |
No default |
The path to the file. |
Outputs
|
Output |
Data Type |
Range |
Unit |
Description |
|---|---|---|---|---|
|
Done |
BOOL |
|
|
If TRUE, the command completed successfully. |
|
Error |
BOOL |
|
|
If TRUE, an error has occurred. |
|
ErrorID |
DINT |
|
|
Indicates the error if Error output is TRUE. See the table in File and TCP/IP Function Block ErrorIDs. |
|
ID |
UDINT |
|
|
The ID of the open file. |
Remarks
-
- The controller allows only 32 open files at any given time.
- If a file already exists, it is overwritten.
- Files must be closed using the FileClose function block.
Figure 1: FileOpenW
FBD Language Example
Not available.
FFLD Language Example
Not available.
IL Language Example
Not available.
ST Language Example
(* FileOpenW example *)
(* Replace FileOpenW with FileOpenA or FileOpenR as needed*)
CASE StepCounter OF
0:
Inst_FileOpenW(TRUE, 'Results.txt');
StepCounter := StepCounter + 1;
1:
Inst_FileOpenW(TRUE, 'Results.txt');
IF Inst_FileOpenW.Done THEN
ResultsFileID := Inst_FileOpenW.ID;
Inst_FileOpenW(FALSE, '');
StepCounter := StepCounter + 1;
END_IF;
END_CASE;
See Also
