System Status Change From The Stop System State - Siemens SIMATIC PCS 7 CPU 410-5H System Manual

7.2.4

System status change from the STOP system state

Requirement
You have selected one of the two CPUs in SIMATIC Manager and opened the "Operating
state" dialog box using the PLC > Diagnostics/Setting > Operating state menu command.
Changing to redundant system mode (starting the fault-tolerant system)
1. Select the fault-tolerant system in the table.
2. Select the Restart button (warm restart).
Result:
The CPU displayed first in the table starts up as master CPU. Then the second CPU starts
up and will become the standby CPU after link-up and update operations.
Changing to standalone mode (starting only one CPU)
1. In the table, select the CPU you want to start up.
2. Select the Restart button (warm restart).
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB
Operator controls and operating modes of the CPU 410-5H
7.2 System states of the redundant CPU 410-5H
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