Siemens SIMATIC CPU 410 System Manual page 235

Procedure
Proceed as follows to change a PROFIBUS DP master:
Step
1
2
3
4
5
Exchanging a CP 443-5 in case of spare part requirement
If a CP 443-5 is replaced by a successor module with a new article number, both modules
must always be replaced in the case of redundantly used components.
Redundantly used modules must be identical, which means they must have the same article
number, product version and firmware version.
Procedure
Step What to do?
1 Stop the standby CPU
2 Turn off the power supply of the central rack.
3 Unplug the PROFIBUS DP cable for the DP master
module in question.
4 Replace the module.
5 Plug the PROFIBUS DP cable back in.
6 Turn on the power supply of the central rack.
7 Switch to the CPU with the modified configuration.
8 Turn off the power supply of the second central rack.
9 Unplug the PROFIBUS DP cable for the second DP
master module.
10 Replace the module.
11 Plug the PROFIBUS DP cable back in.
12 Turn on the power supply of the second central rack
again.
13 Perform a "Warm restart".
CPU 410 Process Automation/CPU 410 SMART
System Manual, 05/2017, A5E31622160-AC
Replacement of failed components during redundant operation
13.3 Replacement of components of the distributed I/O on PROFIBUS DP
What to do?
Turn off the power supply of the central
rack.
Unplug the PROFIBUS DP cable for the DP
master module in question.
Replace the module.
Plug the PROFIBUS DP cable back in.
Turn on the power supply of the central
rack.
How does the system react?
The fault-tolerant system switches to solo
mode.
-
-
-
The CPU performs an automatic LINK-
•
UP and UPDATE.
The CPU switches to RUN and oper-
•
ates as standby CPU.
How does the system react?
The fault-tolerant system switches to solo mode.
-
-
-
-
_
The standby CPU links up, is updated and becomes
the master. The CPU that was master switches to
STOP and the fault-tolerance system operates with
the new hardware in solo mode.
-
-
-
-
-
The CPU executes a LINK-UP and UPDATE and
operates as standby CPU.
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