Siemens S7-300 appendix Profibus

Cycle and reaction times 5.2 Cycle time

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.

HMI/OPC

Industrial Ethernet

Number of observed interconnections

in SIMATIC iMAP or OPC: 200

PROFINET device with

proxy functionality (CPU 317-2 PN/DP)

PROFINET remote node 1

...

PROFINET remote node 32

Quantity: 32

PROFIBUS

PROFIBUS device 1 (as DP slave)

...

PROFIBUS device 16 (as DP slave)

Quantity: 16

The upper graphic displays	Number
Incoming/outgoing remote connections
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	16 x 4
functionality (CPU 317-2 PN/DP) to the PROFIBUS devices.
Interconnections of PROFIBUS devices among each other	16 x 6

5-12	CPU 31xC and CPU 31x, Technical data
	Manual, Edition 08/2004, A5E00105475-05