To transfer the project from the SD card to the PLC, switch the PLC to PROG mode and set the value of this system variable to 1. The PLC will set the following values:
- 1: Transfer started.
- 2: Transfer in progress...
- 3: Transfer completed.
- 70: SD card operation impossible, cover open.
- 71: SD card operation impossible, no SD card.
- 72: SD card operation impossible, SD card reading error (FAT/file error).
- 73: SD card operation impossible, file 'AUTO\AUTOEXEC.FP0H' not found.
- 74: SD card operation impossible, password inconsistency.
- 75: SD card operation impossible, invalid data in file 'AUTO\AUTOEXEC.FP0H'.
