Multicomputing; Removing/Inserting (Module Replacement) - Siemens S7-300 Configuration Manual

There may be a further restriction resulting from the maximum current consumption
depending on the power supply used. You should also note any requirements resulting from
the interface types used (for example RJ45 or AUI).
2.4.3

Multicomputing

The communication load can be distributed by installing several SIMATIC NET CPs (load
balancing). If, however, you want to increase the number of available connection resources,
you can insert several CPUs in a rack (multicomputing). All S7400 CPUs in a rack can
communicate via one or more SIMATIC NET CPs.
The following communications services support multicomputing:
● ISO transport connections
● ISO-on-TCP connections
● S7 functions
● TCP connections
● UDP connections
● Email connections
2.4.4

Removing/inserting (module replacement)

Removing and inserting the SIMATIC NET CPs for the S7400 while the power is on is
possible without damaging the modules.
If a CP is replaced with a new CP with the same order number, the configuration data simply
needs to be downloaded again if it is not stored on the CPU (see also CPspecific sections of
this manual).
Configuring and commissioning S7 CPs for Industrial Ethernet
Configuration Manual, 09/2013, C79000-G8976-C182-13
Characteristics of the Ethernet CPs
2.4 Slot rules for SIMATIC S7400
37