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Automation System S7-400H Fault-tolerant Systems
A5E00068197-07
Modifying the System During Operation
In addition to the options described in Chapter 10 on how to replace failed
components during operation, you can also modify the system with the
CPU 417-4H as of firmware version V2.0.0 and with the CPU 414-4H without
interrupting the current program.
The procedure depends on whether you are working on your user software in
PCS 7 or STEP 7.
In Section Description On Page
11.1 Possible Hardware Modifications 11-2
11.2 Adding Components in PCS 7 11-6
11.3 Removing Components in PCS 7 11-16
11.4 Adding Components in STEP 7 11-24
11.5 Removing Components in STEP 7 11-32
11.6 Changing the CPU Parameters 11-41
11.7 Changing the Memory Components of the CPU 11-47
The procedures described below for making modifications during operation are
each structured so as to start from redundant system mode (see Section 5.2) and
then to return to this mode again.
Notice
Keep strictly to the rules described in this chapter with regard to modifications of
the system during routine operation. If you contravene one or more rules, the
response of the fault-tolerant system can result in its availability being restricted or
even failure of the entire programmable logic controller.
Security-relevant components are not taken into account in this description. For
more details of dealing with fail-safe systems refer to the manual S7-400F and
S7-400FH Programmable Controllers.
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