Siemens SIMATIC PCS 7 Operation And Maintenance page 78

AS and OS expansions
7.1 Changes to the AS configuration
Application field
Typical cases of configuration changes on an H system:
● Adding distributed stations on the PROFIBUS DP or PROFIBUS PA with any bus
address.
● Adding more modules within ET 200M at any free slots.
● Adding more modules within ET 200M at any slots that are occupied by non-configured
reserve modules.
● Reassigning parameters for modules within the ET 200M or ET 200isP (based on the
capabilities of the module in use).
● Assigning a different process image partition to a module.
Additional cases for an H system:
● Removing existing distributed PROFIBUS stations with any bus address.
● Removing existing modules within the ET 200M stations with PROFIBUS connection.
● Replacing an existing module in the ET 200iSP stations with a reserve module
● Adding central modules (e.g. additional CPs for Ethernet or PROFIBUS).
● Changing certain CPU parameters marked in blue (e.g. local data requirements, max.
communication resources or cyclic interrupt cycle).
Note
You can either add or remove modules during a hardware change. If you want to rebuild
your H system by removing a module type and inserting a new type in its place, you need
to perform two hardware changes one after the other.
Requirements
● ET 200M, PA Link, FF Link and Y link should always be mounted with an active
backplane bus and be fully equipped with bus modules, because the bus modules must
not be inserted or removed during operation.
● All free module slots of an ET 200iSP station must be occupied by non-configured
reserve modules and may only be replaced individually, one after the other, as the entire
ET 200iSP station will enter STOP mode if it has two or more free slots. A new module is
then plugged into the configured slot in place of the reserve module.
● ET 200iSP is to be equipped with additional terminal modules and fitted with reserve
modules on the free slots, because the terminal modules cannot be plugged in or pulled
out during operation.
● Bus cables for PROFIBUS DP and PROFIBUS PA should be provided with active bus
terminating elements at both ends so that the cables are properly terminated even during
the rebuilding period.
● PROFIBUS PA bus systems should be built with components from the SplitConnect
product series (see interactive catalog CA01) and active field distributors (AFD, AFDiS
and AFS) so that the lines do not have to be split.
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Compendium Part D - Operation and Maintenance (V9.0)
Operating Manual, 02/2018, A5E43228948-AA