Siemens CPU 410-5H Process Automation User Manual

Failure and replacement of components during redundant operation
11.1 Failure and replacement of central components
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
169
Step
What has to be done?
How does the system react?
1 Turn off the power supply (24 V DC for PS
405 or 120/230 V AC for PS 407).
• The entire subsystem is switched off
(system operates in single mode).
2
Replace the module.
–
3 Switch the power supply module on again.
• The CPU executes the self-tests.
• The CPU performs an automatic LINK-
UP and UPDATE.
• The CPU changes to RUN (redundant
system mode) and operates as reserve
CPU.
Note
Redundant power supply
If you use a redundant power supply (PS 407 10A R),
two power supply modules are
assigned to one fault
-tolerant CPU. If a part of the redundant PS 407 10A R power supply
module fails, the associated CPU keeps on running.
The defective part can be replaced
during operation.
Other power supply modules
If the failure concerns a power supply module outside the central rack (e.g. in the expansion
rack or in the I/O device), the failure is reported as a rack failure (central) or station failure
(remote). In this case, simply switch off the power supply to the power supply module
concerned.
11.1.3
Failure and replacement of an input/output or function module
Starting situation
Failure
How does the system react?
The CPU 410-5H is in redundant system mode
and an input/output or function module fails.
• Both CPUs report the event in the diagnostic
buffer and via appropriate OBs.

Siemens CPU 410-5H Process Automation Specifications

General

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