Siemens SIMATIC S7-1500R/H Getting Started page 51

Commissioning
Starting CPUs after downloading
Requirement:
The CPU mode selector is in the RUN position.
Procedure:
1. To start the primary CPU after loading is complete, select "Start module" in the "Action"
column.
2. To complete loading, click "Finish".
Result: The primary CPU switches to the RUN operating state.
3. Switch the backup CPU to the RUN operating state.
Result: After successful synchronization between the primary and backup CPU, the S7-
1500R/H system switches to redundant mode (system state RUN=Redundant).
Evaluating LEDs and displays at the CPUs
If the CPUs are in the "target" system state RUN-Redundant and there are no events,
requirements and errors, then the two CPUs show the following LED screens:
● the RUN/STOP LED lights up green
● the ERROR-LED is off
● the MAINT LED is off
The status information of the CPU is displayed on the display. In the system state RUN-
Redundant, "RUN-Redundant" is displayed in a green bar on the two CPU displays.
Result
You have fully created and downloaded the configuration and the user program in
accordance with the task of the example.
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S7-1500R/H redundant system
Getting Started, 10/2018, A5E44910930-AA