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

17.5

Adding components in STEP 7

Starting situation
You have verified that the CPU parameters (e.g. monitoring times) match the planned new
program. Adapt the CPU parameters first, if necessary (see section Editing CPU parameters
(Page 323)).
The fault-tolerant system is operating in redundant system 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 described in a subsection.
Step What to do?
1 Modification of hardware
2 Editing the hardware configuration offline
3 Expanding and downloading OBs
4 Stopping the reserve CPU
5 Downloading a new hardware configuration to the reserve
CPU
6 Switching to CPU with modified configuration
7 Transition to redundant system mode
8 Editing and downloading the user program
S7-400H
System Manual, 03/2012, A5E00267695-11
System modifications during operation
17.5 Adding components in STEP 7
See section
STEP 7, step 1: Adding hardware (Page 304)
STEP 7, step 2: Offline modification of the
hardware configuration (Page 305)
STEP 7, step 3: Expanding and downloading
OBs (Page 305)
STEP 7, step 4: Stopping the reserve CPU
(Page 306)
STEP 7, step 5: Loading a new hardware
configuration in the reserve CPU (Page 306)
STEP 7, step 6: Switch to CPU with modified
configuration (Page 307)
STEP 7, step 7: Transition to redundant
system mode (Page 308)
STEP 7, step 8: Editing and downloading the
user program (Page 309)
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