Failure And Replacement Of A Profibus-Dp Slave - Siemens SIMATIC S7-400H Manual

10.2.3

Failure and Replacement of a PROFIBUS-DP Slave

Initial situation
The S7-400H is in redundant system mode
and one DP slave fails.
Procedure
To replace a DP slave, perform the following steps:
Step
1
2
3
4
Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Failure and Replacement of Components During Operation
Failure
What Has To Be Done?
Turn off the supply for the DP slave.
Unplug the connected bus connector.
Replace the DP slave.
Plug the bus connector on and turn the
supply back on.
How Does the System React?
Both CPUs report the event in the
diagnostics buffer and via the appropriate
OB.
How Does the System React?
-
-
-
•
CPUs process the mounting rack
failure OB 86 in synchronism
(outgoing event).
•
DP slave can be addressed by the
relevant DP master system.
10-15