ISPSoft User Manual Introducing Redundant page content: CPU ID: an id for A and B controller to check whether the controller is switched in the redundant system and uses API2901 RCS command for setting or reading. Synchronization Options: contains ‘Always’ and ‘Condition’ which also allows users to check the redundant system and synchronization settings, please refer to related product manuals. Download Settings : Finish setting CPU ID and Synchronization Options, users need to click this button to download to PLC hosts. Synchronize : triggers the master CPU to check the standby CPU and will only initiate synchronization under qualified standby CPU. Unsynchronize:
cancelling the standby CPU Switchover : refers to switching controllers under qualified standby CPU. Become Master : allows the standby CPU to become the master CPU when the master CPU does not exist. 18-32 Control Mode CPU Standby Mode CPU