Adding Components In Step 7 - Siemens SIMATIC S7-400H System Manual

14.5

Adding components in STEP 7

Starting situation
You have verified that the CPU parameters, such as monitoring times, match the planned
new program. If they do not, adapt the CPU parameters first (see section Editing CPU
parameters (Page 234)).
The fault-tolerant system is operating in redundant mode.
Procedure
Carry out the steps listed below to add hardware components to a fault-tolerant system in
STEP 7. Details of each step are listed in a subsection.
Step
1
2
3
4
5
6
7
8
S7-400H
System Manual, 09/2007, A5E00267695-03
What has to be done?
Modification of hardware
Offline modification of the hardware configuration
Expanding and downloading OBs
Stopping the standby CPU
Loading new hardware configuration in the standby CPU
Switch to CPU with altered configuration
Change to redundant mode
Editing and downloading the user program
System modifications in operation
14.5 Adding components in STEP 7
See section
STEP 7, step 1: Adding
hardware (Page 220)
STEP 7, step 2: Offline
modification of the hardware
configuration (Page 221)
STEP 7, step 3: Expanding
and downloading OBs
(Page 221)
STEP 7, step 4: Stopping the
standby CPU (Page 222)
STEP 7, step 5: Loading new
hardware configuration in the
standby CPU (Page 222)
STEP 7, step 6: Switch to
CPU with modified
configuration (Page 223)
STEP 7, step 7: Transition to
redundant state (Page 224)
STEP 7, step 8: Editing and
downloading the user
program (Page 225)
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