Displaying And Changing The System State Of A Fault-Tolerant System; System Status Change From The Stop System State - Siemens SIMATIC PCS 7 System Manual

Operator controls and operating modes of the CPU 410-5H
7.2 System states of the redundant CPU 410-5H
7.2.3

Displaying and changing the system state of a fault-tolerant system

Procedure:
1. Select a CPU in SIMATIC Manager.
2. Select the menu command PLC > Diagnostics/Setting >Operating state.
Note
STOP is only possible with authorization in projects with password protection.
Result:
The "Operating state" dialog box shows the current system state of the fault-tolerant system
and the operating states of the individual central processing units.
The CPU that was selected in SIMATIC Manager when the menu command was executed is
the first one displayed in the table.
Changing the system state:
The options of changing the system state depend on the current system state of the fault-
tolerant system.
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.
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CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 09/2014, A5E32631667-AB