Failure And Replacement Of Components During Operation - Siemens SIMATIC S7-400H System Manual

Failure and replacement of components during
operation
16.1

Failure and replacement of components during operation

One factor that is crucial to the uninterrupted operation of the fault-tolerant controller is the
replacement of failed components during operation. Quick repairs will recover fault-tolerant
redundancy.
We will show you in the following sections how simple and fast it can be to repair and
replace components in the S7-400H. Also refer to the tips in the corresponding sections of
the manual
16.2 Failure and replacement of components during operation
Which components can be replaced?
The following components can be replaced during operation:
● Central processing units (e.g. CPU 417–5H)
● Power supply modules (e.g. PS 405, PS 407)
● Signal and function modules
● Communication processors
● Synchronization modules and fiber-optic cables
● Interface modules (e.g. IM 460, IM 461)
S7-400H
System Manual, 03/2012, A5E00267695-11
S7-400 Automation Systems, Installation
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