Siemens SIMATIC S7-400H System Manual page 183

The functions and use of the blocks are described in the corresponding online help.
NOTICE
Blocks from different libraries
Always use blocks from a single library. Simultaneous use of blocks from different libraries
is not permitted.
If you wish to replace one of the earlier libraries Redundant IO (V1) or Redundant IO CGP
with the Redundant IO CGP V5.0, you must first of all edit your user program accordingly.
Refer to the context-sensitive block help or the STEP 7 Readme for more information.
Switching to channel group-specific redundancy
To activate channel group-specific passivation, you have to stop the automation system
(memory reset and reload user program in STOP).
Observe the following:
Mixing blocks from various libraries in one CPU is not permitted and can lead to
unpredictable behavior.
When converting a project, make sure that all library blocks named FB450–453 and FC450–
451 have been deleted from the block folder and replaced by the blocks from Red-IO CGP
V5.0. Perform this step in every relevant program. Compile and load your project.
S7-400H
System Manual, 03/2012, A5E00267695-11
13.4 Connecting redundant I/O to the PROFIBUS DP interface
Using I/Os in S7–400H
183