Procedure
1.
After compilation, check the messages in the "Load preview" dialog window.
2.
If the S7-1500R/H system is not in STOP, stop the system. To do so, select "Stop RH
system" in the "Action" column of the drop-down menu.
3.
Click the "Download" button to start the download.
Starting the CPU after loading
The "Results of loading" dialog window displays the results of the loading process.
WARNING
CPU startup with user program with errors
Before starting the CPU, make sure that a user program with errors:
• Cannot cause damage or injury
• Will not lead to dangerous system states
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 SYNCUP, the S7-1500R/H system switches to redundant mode.
NOTE
Role change during loading
Beware of a possible role change between primary and backup CPU shortly before, during or
after loading.
A role change can occur during loading if the primary CPU fails (power failure, hardware
defect) or is in STOP and:
• You switch the backup CPU to RUN operating state during this time using the mode
selector, the display or a communication command.
or
• You switch on the backup CPU during this time.
In the event of a role change, the new primary CPU starts up with the old project data. The
new project data in the backup CPU is overwritten with the old project data during
synchronization of the two CPUs for redundant operation.
259
Commissioning
11.3 Commissioning procedure
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
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