Replacing A Defective Redundancy Connection With S7-1500H - Siemens SIMATIC S7-1500 System Manual

Maintenance
13.1 Replacing components of the S7-1500R/H redundant system
Procedure: Replacing the two PROFINET cables
Proceed as follows to replace the defective PROFINET cables:
1. Locate the defective PROFINET cables in the PROFINET ring.
2. Replace the PROFINET cables, one after the other.
3. If necessary, restart each of the two CPUs on after the other.
Result
The redundant system switches to the RUN-Redundant system state.
Initial situation: Failure of two PROFINET cables simultaneously
Two PROFINET cables in the PROFINET ring have been interrupted at two points
simultaneously (≤ 1500 ms apart).
Both R-CPUs are primary CPUs. The S7‑1500R redundant system is in an undefined system
state.
Procedure: Replacing the two PROFINET cables
Proceed as follows to replace the defective PROFINET cables:
1. Immediately switch both R-CPUs to the STOP operating state.
2. Locate the defective PROFINET cables in the PROFINET ring.
3. Replace the PROFINET cables, one after the other.
4. Then start the R-CPUs.
Result
The redundant system switches to the RUN-Redundant system state.
13.1.3.2

Replacing a defective redundancy connection with S7-1500H

Initial situation
One redundancy connection (fiber-optic cable) has been interrupted. Display shows: Single
pairing with information on interface and port.
The S7‑1500H redundant system is in the RUN-Redundant system state.
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S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD