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

Maintenance
14.1 Replacing components of the S7-1500R/H redundant system
S7-1500H:
• Replace a defective redundancy connection with S7-1500H.
A fiber-optic cable has been interrupted.
• Replace defective synchronization module with S7-1500H.
• Replace two defective redundancy connections with S7-1500H.
Both fiber-optic cables have been interrupted.
Evaluating the diagnostics buffer
Detailed diagnostics information is provided in the diagnostics buffer of the R/H-CPU. The
entries are particularly useful in the replacement scenarios for the redundancy connections:
• S7-1500R: They contain information on whether one PROFINET cable or both PROFINET
cables have been interrupted or a port of an R-CPU is defective.
• S7-1500H: You can access information on whether a fiber-optic cable has been
interrupted or the synchronization module is defective (with additional module
diagnostics).
14.1.3.1

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 RUN-Solo system state.
Requirement
Read the information in the section Checking before replacing components (Page 443).
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.
448
S7-1500R/H redundant system
System Manual, 01/2024, A5E41814787-AF