Siemens SIMATIC CPU 410 User Manual

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
236 System Manual, 05/2017, A5E31622160-AC
See also
The H-CiR wizard (Page 197)
13.3.2
Replacement of a redundant PROFIBUS DP interface module
Starting situation
Failure
How does the system react?
The S7-400H is in redundant system mode and a
PROFIBUS DP interface module (IM 153–2, IM
157) fails.
Both CPUs report the event in the diagnostic
buffer and via OB 70.
Replacement procedure
Proceed as follows to replace the PROFIBUS DP interface module:
Step
What has to be done?
How does the system react?
1 Turn off the supply for the affected DP
interface module.
–
2
Remove the bus connector.
–
3 Insert the new PROFIBUS DP interface
module and turn the power supply back on.
–
4 Plug the bus connector back in.
• The CPUs process the I/O redundancy
error OB 70 (outgoing event) synchro-
nized with each other.
• Redundant access to the station by the
system is now possible again.
13.3.3
Replacement of a PROFIBUS DP slave
Starting situation
Failure
How does the system react?
The S7-400H is in redundant system state and a
DP slave fails.
Both CPUs signal the event in the diagnostics
buffer and via a corresponding OB 86.

Siemens SIMATIC CPU 410 Specifications

General

Brand	Siemens
Model	SIMATIC CPU 410
Category	Control Unit
Language	English