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