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Ethernet Products
9.2.1 RFC Multicomputing with TSAP
This function makes it possible to communicate with more than
one CPU on a rack ( multicomputing) in S7-400 systems with-
out any need for the additional CPUs to be connected to the same
PROFIBUS cable.
For this to be possible, direct communications take place with on-
ly one single configured station (CPU address 49 in this example).
This station then forwards data packets to the desired rack/slot.
If you use this mode, the following settings must be configured
on the web interface configuration page:
• “RFC Multi Computing with TSAP” must be enabled (ON)
• “RFC Routing over CP with TSAP” must be disabled (OFF)
• Enter the address for the communication station that will be
communicating with the multicomputing system as the “Bus
address”
The rack/slot address for the station that will be used to commu-
nicate on the rack must be configured in the communication
software (in the above example: R/S = 0/3 for CPU 1 and R/S = 0/5
for CPU 2)
9.2.2 RFC Routing over CP with TSAP
This configuration makes it possible to use computer applications
to address multiple CPs connected to the same bus by using the
CPs’ PROFIBUS addresses. The applications will “route” the frame
to the connected CPUs based on the configured rack/slot setup.
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