Erasing

Erasing the memory card is possible by using the %SW93 word via the Control Expert animation table but normally has not to be used. Erasing or formatting the card on a PC using Windows commands may render the card unusable.

When the memory card is erased, the default directory \DataStorage\ is created.

Before erasing with Control Expert, the user must download an application by default. Otherwise, the %SW93 system word does not exist.

NOTE: Erasing is only possible when the PLC is in STOP mode.

%SW93 Operating Mode

The erasing command and status of the memory card are provided by the %SW93 system word.

SW93.0: a rising edge starts the erasing.

SW93.1: gives the status of the system file partition:

  • 0: invalid system file partition (incorrect format, erasing in progress, etc.),

  • 1: Valid system file partition.

The figure below displays the statuses of the %SW93.0 and %SW93.1 bits.

Save

It is recommended that users save the file partition (data stored, manufacturer or user Web pages) with the FTP client, which can be launched from Control Expert.

Users can save Web pages with FactoryCast or WAD (Web Application Designer). They can therefore restore pages in case of problems.

The Automation Device Maintenance software also allows files to be saved on the memory card.