Siemens SIMATIC S7-400H - Failure and Replacement of Components During Operation

S7-400H
System Manual, 03/2012, A5E00267695-11
265
Failure and replacement of components during
operation
16
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
S7-400 Automation Systems, Installation
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)