Displaying And Changing The System State Of A Fault-Tolerant System - Siemens SIMATIC S7-400H System Manual

11.2.2

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

Procedure:
1. In SIMATIC Manager, select a CPU with existing MPI connection.
2. Select the PLC > Operating mode menu command.
Result:
The "Operating mode" dialog shows the current system state of the fault-tolerant system, the
operating states of the individual CPUs, as well as the current position of the mode switches
on the modules.
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.
S7-400H
System Manual, 03/2012, A5E00267695-11
System and operating states of the S7–400H
11.2 System states of the S7–400H
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