How do we know the clone operation process to create a SD card image is completed with M241/M251 PLCs ?
This FAQ topic refers to the operation named ‘clone’ which consists in getting the whole content of any M241/M251 PLC ( getting both firmware and project application), make copying it into an empty SD card
When starting the clone process (powering ON the PLC with an empty SD card inside) the green LED SD is fast flashing, but it’s flashing very fast.
At the end of the process, the SD LED changes state to stay fixed ON until we remove the SD card. But as the eyes can’t really distinguish the difference in the light emitted by the LED between fast flashing and steady On, we can’t really not see some difference between the two states ‘clone in progress’ and ‘clone operation completed’
Then to be sure the process ended correctly, it’s recommended:
- to wait up to really 5 minutes after the PLC is Powered ON
- check afterward, the content of the SD card, by plugging it into some SD card reader, to check the file named SCRIPT.CMD is present in the directory name /sys/cmd of the SD card ( this is the last action achieved by the system during the clone procedure)
When starting the clone process (powering ON the PLC with an empty SD card inside) the green LED SD is fast flashing, but it’s flashing very fast.
At the end of the process, the SD LED changes state to stay fixed ON until we remove the SD card. But as the eyes can’t really distinguish the difference in the light emitted by the LED between fast flashing and steady On, we can’t really not see some difference between the two states ‘clone in progress’ and ‘clone operation completed’
Then to be sure the process ended correctly, it’s recommended:
- to wait up to really 5 minutes after the PLC is Powered ON
- check afterward, the content of the SD card, by plugging it into some SD card reader, to check the file named SCRIPT.CMD is present in the directory name /sys/cmd of the SD card ( this is the last action achieved by the system during the clone procedure)