2 Common Specifications of IAG Behavior of Each Device and Data Flow As shown in the figure below, IAGs execute a backup by using each device’s function, and each de- vice collects the backup data. If you configure the backup settings to save only device data that has been changed form the last backup, the IAGs execute a back up only after performing a comparison for each device. For details on the comparison, refer to 2-1-3 Comparison on page 2-10. 2-1 Function Executing Backup of NJ/NX-series CPU Units IAGs execute a backup by using the SD Memory Card backup function of the NJ/NX-series CPU Unit.
The IAGs read out data from the SD Memory Card in the NJ/NX-series CPU Unit and write it to the specified save-in location. Simultaneously, they also write the data to the SD Memory Card in the NA-series Programmable Terminal and save as the latest backup data.
2 2-1-1 Backup NA-series Programmable Terminal Save-in location of backup data (1) Start a backup using the SD Card backup function (2) Read backup results using the SD Memory Card backup function USB Memory FTP server Ethernet (3) Transfer data NA-series data NJ/NX-series data NJ/NX-series CPU Unit Safety Control Unit* NX-series NX-series Safety Control Unit data Backup data * Cannot be mounted to NJ-series CPU Units 2-3 Programmable Terminals NA-series Practices Guide NJ/NX/NA-series Backup and Restore IAG (V127) ory Card SD Mem ory Ca Data Card