FileOpenA

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 Function Block - Create or open a file in append mode.

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.

Files must be closed using the FileClose function block.

Figure 1: FileOpenA

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