Chapter 18 Testing and Debugging Tools 18.4 Checking the Status of a PLC 18.4.1 System Information If ISPSoft is connected to the PLC normally, the system will retrieve information from the PLC after users click System Information… on the PLC menu. For AH560 redundant system series, a Redundant page is added. AH560 Redundant System In Redundant page provides current redundant system status or related settings. The current system can only operate under standby mode CPU; only redundancy system status appears in Control Mode CPU (see below). 18-31