Mode
Determines whether the file is being read from or written to, and whether the file format is ASCII or binary. Mode must be enclosed in quotes. Right-click the parameter to display a list of the following options:
| Mode | Description |
|---|---|
| "a" | Append to ASCII file at  EOF End of file. (write). Set SeekPoint to -1 to append to end of
file, or specify a value to begin writing other than end of file. |
| "ab" | Append to binary file at EOF (write). Set SeekPoint to -1 to append to end of file, or specify a value to begin writing other than end of file. |
| "a+" | Append to ASCII file at EOF (read/write). Set SeekPoint to -1 to append to end of file, or specify a value to begin writing other than end of file. |
| "a+b" | Append to binary file at EOF (read/write). Set SeekPoint to -1 to append to end of file, or specify a value to begin writing other than end of file. |
| “d” | Opens a connection to a specified directory; used to determine if a drive is available. |
| "r" | Open ASCII file for reading at SeekPoint (read). |
| "rb" | Open binary file for reading at SeekPoint (read). |
| "r+" | Open ASCII file for update at SeekPoint (read/write). |
| "r+b" | Open binary file for update at SeekPoint (read/write). |
| "w" | Open/overwrite ASCII file (write). SeekPoint is not valid; leave at 0. |
| "wb" | Open/overwrite binary file (write). SeekPoint is not valid; leave at 0. |
| "w+" | Open/overwrite ASCII file (read/write). SeekPoint is not valid; leave at 0. |
| "w+b" | Open/overwrite binary file (read/write). SeekPoint is not valid; leave at 0. |
NOTE: If the file is opened with a mode that specifies ASCII, when a Chr(10) (line feed) is encountered, a Chr(13) (carriage return) is inserted before the line feed.
The MoveBytes instruction should be used to move floats into a
string variable if TOB1 binary files are being written.
Type: String Variable