Siemens Simatic S7-1500R System Manual page 260

● In STEP 7 in the diagnostic status (Online & diagnostics) of the S7-1500R/H system:
Check the system state in the diagnostic status:
– Pairing: "Paired" is shown in the "Pairing state" field.
– No pairing: "Not paired" is shown in the "Pairing state" field.
Figure 11-1 "Paired" diagnostics state
● In STEP 7 in the diagnostics buffer (Online & diagnostics): Check the entries on pairing.
Procedure
To start the pairing, for example when redundancy connections are interrupted, follow these
steps:
1. Set the mode selector for the backup CPU to STOP.
2. S7-1500R: Repair the PROFINET cables in the PROFINET ring. Insert the PROFINET
cables into the R-CPU interfaces.
S7-1500H: Repair the fiber-optic cables and synchronization modules. Insert the fiber-
optic cables into the synchronization modules.
3. Check for successful pairing of the redundant system. Please note the information in
"Checking pairing state" above.
4. Switch the backup CPU to the RUN operating state with the mode selector.
Result
The S7-1500R/H redundant system switches to the RUN-Redundant system state.
S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA
11.1 Replacing components of the S7-1500R/H redundant system
Maintenance
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