Siemens SIMATIC S7-400H System Manual page 325

Hardware requirements for system modifications during operation
To modify a system during operation, the following hardware requirements must be met at
the commissioning stage:
● Use of an S7 400 CPU
● S7 400 H CPU only in stand-alone mode
● If you use a CP 443-5 Extended, this must have a firmware V5.0 or higher.
● To add modules to an ET 200M: Use an IM153-2, version MLFB 6ES7 153-2BA00-0XB0
● If you want to add entire stations: Make sure that you have the required connectors,
● If you want to add PA slaves (field devices): Use IM157 version MLFB 6ES7
Software requirements for system modifications during operation
To make modifications during operation, the user program must be written so that station
failures or module faults, for example, do not lead to a CPU STOP.
Permitted system modifications: Overview
During operation, you can make the following system modifications:
● Add components or modules with modular DP slaves ET 200M, ET 200S and ET 200iS,
● Use of previously unused channels in a module or submodule of the 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 of an IM157.
● Add PA Links (including PA master systems) to an existing DP master system.
● Assign added modules to a process image partition.
● Change parameter settings for I/O modules, for example selecting different interrupt limits.
● Undo changes: Modules, submodules, DP slaves and PA slaves (field devices) you added
S7-400H
System Manual, 09/2007, A5E00267695-03
or higher, or an IM153-2FO, version MLFB 6ES7 153-2BB00-0XB0 or higher.
The installed ET 200M also requires an active backplane bus with sufficient free space
for the planned expansion. Include the ET 200M so that it complies with IEC 61158.
repeaters, etc.
157-0AA82-0XA00 or higher in the corresponding DP/PA Link.
Note
You can freely combine components which support system modifications during operation
with those that do not. Depending on your selected configuration, there may be restrictions
affecting the components on which you can make system modifications during operation.
provided they are compliant with IEC 61158.
ET 200M, ET 200S and ET 200iS.
earlier can be removed again.
Stand-alone operation
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