Siemens SIMATIC S7-400 Reference Manual page 43

Hardware Requirements for Modification of a System During Operation
The following hardware requirement must be fulfilled during the commissioning
phase in order to be able to subsequently modify the system during operation:
• An S7-400 standard CPU (CPU 412, CPU 414, CPU 416 or CPU 417),
firmware V3.1 or later, or an S7-400-H-CPU (CPU 414-4H or CPU 417-4H) in
single mode. firmware V3.1 or later.
• If you wish to modify the system during operation on a DP master system with
an external DP master (CP 443-5 extended), it must have firmware V5.0 or
later.
• If you want to add modules for the ET 200M: Use the IM153-2 version MLFB
6ES7 153-2AA03-0XB0 or later or the IM 153-2FO version MLFB 6ES7
153-2BB00-0XB0 or later. You will also need to install the ET 200M with active
bus elements and with enough free space for the planned expansion. You may
not install the ET 200M as DPV0 slave (using a GSD file).
• If you wish to add entire stations: be sure to include the required bus
connectors, repeaters, etc.
• If you wish to add PA slaves (field devices): use IM157 version
6ES7157-0AA82-0XA00 or later in the corresponding DP/PA Link.
• Rack CR2 cannot be used.
• The cannot use one or more of the following modules within a station where you
wish to modify the system during operation using CiR: CP 441-1, CP 441-2, CP
444.
• No multicomputing
• No multimaster configuration
• No use of I-slaves on DP master systems from where you wish to modify the
system during operation using CiR.
If you have configured a CPU 41x as a I-slave on one of your interfaces
(MPI/DP, DP or interface module IF 964-DP) and one or more additional DP
master systems go out from this CPU (via the other interfaces or via an external
DP interface module CP 443-5), then the following applies: you can modify the
system during operation using CiR on these additional DP master systems
(although you cannot reconfigure the I-slave interface).
Note
You can freely mix components that are cable of system modification during
operation and those that are not (except for those listed above). However, you can
only make system modifications to CiR-capable components.
Automation System S7-400 CPU Specifications
A5E00165965-01
Structure of a CPU 41x
1-31