Siemens SIMATIC CPU 410

Replacement of failed components during redundant operation
13.3 Replacement of components of the distributed I/O on PROFIBUS DP
CPU 410 Process Automation/CPU 410 SMART
238 System Manual, 05/2017, A5E31622160-AC
Replacement procedure
Proceed as follows to replace PROFIBUS DP cables:
Step
What to do?
How does the system react?
1 Check the cabling and localize the
interrupted PROFIBUS DP cable.
–
2 Replace the defective cable. The CPUs process the error OBs synchronized
with each other
• With one-sided I/O:
Rack failure OB 86 (outgoing event)
The LED BUS1F goes out.
The DP slaves can be addressed via the
DP master system.
• With switched I/O:
I/O redundancy error OB 70 (outgoing
event).
The DP slaves can be addressed via both
DP master systems.
The LED BUS1F and the LED REDF go
out.