Replacing Two Defective Profinet Cables With S7-1500R - Siemens Simatic S7-1500R System Manual

Maintenance
11.1 Replacing components of the S7-1500R/H redundant system
11.1.3.1

Replacing two defective PROFINET cables with S7-1500R

Initial situation: Failure of two PROFINET cables, one after the other
Two PROFINET cables in the PROFINET ring have been interrupted one after the other at
two points (> 1500 ms apart).
The S7-1500R redundant system is in the STOP system state.
Requirement
Read the information in the section Checking before replacing components (Page 257).
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. Restart each of the two CPUs.
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. Afterwards, switch the R-CPUs back to the RUN operating state.
Result
The redundant system switches to the RUN-Redundant system state.
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S7-1500R/H redundant system
System Manual, 10/2018, A5E41814787-AA