System and operating states of the CPU 410
7.2 System states of the redundant CPU 410
CPU 410 Process Automation/CPU 410 SMART
112 System Manual, 05/2017, A5E31622160-AC
Changing to STOP system state (stopping the fault-tolerant system)
1. Select the fault-tolerant system in the table.
2. Select the Stop button.
Both CPUs switch to STOP.
Changing to standalone mode (stop of one CPU)
1. In the table, select the CPU that you want to stop.
2. Select the Stop button.
The selected CPU goes into the STOP state, while the other CPU remains in RUN state; the
fault-tolerant system continues operating in standalone mode.
Note
Any set up access right is not canceled until you stop the SIMATIC Manager. You should
reset the access right once again to prevent unauthorized access. You reset the access right
in the SIMATIC Manager with the menu command PLC > Access
Rights > Cancel.
System diagnostics of a fault-tolerant system
The diagnose hardware function identifies the state of the entire fault-tolerant system.
1. Select the fault-tolerant station in SIMATIC Manager.
2. Select the menu command PLC > Diagnostics/Setting >Diagnose hardware.
3. In the "Select CPU" dialog, select the CPU and confirm with OK.
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