Special functions of a CPU 41x
3.3 System modifications during operation
S7-400 Automation System, CPU Specifications
3-10 Manual, 10/2006, 6ES7498-8AA04-8BA0
3.3.4 Permitted system modifications
Overview
During operation, you can make the following system modifications:
● Add modules to the ET 200M modular DP slave provided that you have not linked it as a
DPV0 slave (using a GSD file).
● Change the parameter assignment of ET 200M modules, for example, setting different
limits or using previously unused channels.
● Use previously unused channels in a module or submodule in the ET 200M, ET 200S,
ET 200iS modular slaves.
● Add DP slaves to an existing DP master system.
● Add PA slaves (field devices) to an existing PA master system.
● Add DP/PA couplers downstream from an IM157.
● Add PA-Links (including PA master systems) to an existing DP master system.
● Assign added modules to a process image partition.
● Reassign parameters for existing ET 200M stations (standard modules and fail-safe
signal modules in standard mode).
● Reversing changes: Added modules, submodules, DP slaves and PA slaves (field
devices) can be removed again.
Note
If you want to add or remove slaves or modules or modify the existing process image
partition assignment, this is possible in a maximum of four DP master systems.
All other modifications not specifically permitted above are not permitted during operation
and are not discussed further here.
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