Siemens Simatic S7-300 Technical Data Manual page 94

Cycle and reaction times
5.2 Cycle time
The following graphic shows the configuration that was used for the measurements.
Industrial Ethernet
PROFIBUS
The upper graphic displays
Incoming/outgoing remote connections
Cyclical interconnection via Ethernet
Acyclic interconnection via Ethernet
Interconnections from the PROFINET device with proxy
functionality (CPU 317-2 PN/DP) to the PROFIBUS devices.
Interconnections of PROFIBUS devices among each other
5-12
Note
The use of CBA with cyclical PROFINET interconnections requires the use of switches to
maintain the performance data. 100-Mbit full-duplex operation is mandatory with cyclical
PROFINET interconnections.
HMI/OPC
Number of observed
interconnections
in SIMATIC iMAP
or OPC: 200
PROFINET device with
proxy functionality
(CPU 317-2 PN/DP)
PROFINET
remote
node 1
PROFIBUS device 1
...
(as DP slave)
PROFINET
...
remote
Quantity: 32
node 32
PROFIBUS device 16
Quantity: 16
(as DP slave)
Number
200, scan cycle rate: Intervals of
10 ms
50, scan cycle rate: Intervals of
500 ms
16 x 4
16 x 6
CPU 31xC and CPU 31x, Technical data
Manual, Edition 08/2004, A5E00105475-05