Siemens CPU 410-5H Process Automation User Manual

Failure and replacement of components during redundant operation
11.2 Failure and replacement of components of the distributed I/Os
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
177
11.2.2
Failure and 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)
synchronized with each other.
• Redundant access to the station by the
system is now possible again.
11.2.3
Failure and 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.
Procedure
Proceed as follows to replace an IO device:
Step
What has to be done?
How does the system react?
1 Switch off the power supply for the IO
device.
–
2
Remove the bus connector.
–

Siemens CPU 410-5H Process Automation Specifications

General

Brand	Siemens
Model	CPU 410-5H Process Automation
Category	Controller
Language	English