Step 7, Step 2: Offline Modification Of The Hardware Configuration; Step 7, Step 3: Expanding And Downloading Obs - Siemens SIMATIC S7-400H System Manual

17.5.2

STEP 7, step 2: Offline modification of the hardware configuration

Starting situation
The fault-tolerant system is operating in redundant system mode. The modules added are
not yet addressed.
Procedure
1. Perform all the modifications to the hardware configuration relating to the added
2. Compile the new hardware configuration, but do not load it into the target system just yet.
Result
The modified hardware configuration is in the PG. The target system continues operation
with the old configuration in redundant system mode.
Configuring connections
The interconnections with added CPs must be configured on both connection partners after
you complete the HW modification.
17.5.3

STEP 7, step 3: Expanding and downloading OBs

Starting situation
The fault-tolerant system is operating in redundant system mode.
Procedure
1. Verify that the interrupt OBs 4x, 82, 83, 85, 86, OB 88 and 122 react to any interrupts of
2. Download the modified OBs and the corresponding program elements to the target
Result
The fault-tolerant system is operating in redundant system mode.
S7-400H
System Manual, 03/2012, A5E00267695-11
hardware offline.
the new components as intended.
system.
System modifications during operation
17.5 Adding components in STEP 7
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