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