Network load

The following table shows the generated cyclical real-time network load per PROFINET device. A PROFINET packet size of 60 bytes and a PROFINET data rate of 100 Mbit/s is assumed

Refresh time

ms

Network load

%

1

0.86

2

0.43

4

0.22

8

0.11

In order to leave sufficient reserves for extensions and especially for NRT (Non Real Time) communication, observe the following limit values for network load of cyclic real-time communication when planning the PROFINET network:

Network load

Recommendation

< 20%

No action required.

20% – 50%

Check the planned network load.

> 50%

Reduce the network load.