Removing Components In Step 7 - Siemens SIMATIC S7-400H Manual

Modifying the System During Operation
11.5

Removing Components in STEP 7

Initial situation
You have ensured that the CPU parameters (e.g. the monitoring times) suit the
planned new program. If necessary you must first change the CPU parameters
accordingly (see Section 11.6).
The modules to be removed and the associated sensors and actuators are no
longer of any significance for the process to be controlled. The fault-tolerant
system is working in redundant system mode.
Procedure
In order to remove hardware components from a fault-tolerant system under
STEP 7 the steps listed below are to be performed. Details of each step are listed
in a subsection.
Step
I
II
III
IV
V
VI
VII
VIII
Exceptions
This procedure for system modification should not be used to remove interface
modules (see Section 11.5.9).
11-32
What Has To Be Done?
Offline Modification of the Hardware Configuration
Changing and Loading User Program
Stopping the Standby CPU
Loading New Hardware Configuration in the Standby CPU
Switch to CPU with modified configuration
Transition to Redundant System Mode
Modification of Hardware
Modifying and Loading Organization Blocks
Automation System S7-400H Fault-tolerant Systems
Refer to Section
11.5.1
11.5.2
11.5.3
11.5.4
11.5.5
11.5.6
11.5.7
11.5.8
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