For technical reasons, the PLC program, i.e. the function blocks, should only be saved when the machine or system is in its basic state. The PLC program must be able to restart from this state. The situation is different with data blocks: These can be saved at any time. However, here too, the recommendation is to execute a backup only in defined machine states in order to ensure the consistency of the saved ones. Test SPSDataBackupPro now with our trial version.