Permitted System Modifications - Siemens SIMATIC S7-400 Manual

Special functions of a CPU 41x
3.3 System modifications during operation
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
● Change the parameter assignment of ET 200M modules, for example, setting different
● Use previously unused channels in a module or submodule in the ET 200M, ET 200S,
● 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
● Reversing changes: Added modules, submodules, DP slaves and PA slaves (field
All other modifications not specifically permitted above are not permitted during operation
and are not discussed further here.
3-10
DPV0 slave (using a GSD file).
limits or using previously unused channels.
ET 200iS modular slaves.
signal modules in standard mode).
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.
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0