Onboard ETHERNET Statistic

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This view is refreshed cyclically and shows in above part the common ETHERNET errors like late collisions, invalid frame errors.

If these error counters are growing, this indicates problems with the ETHERNET cabling or overload.

Transmitted and received bytes are shown as a sum and bytes per second.

The lower part shows information about the throttling status.

Throttling is a mechanism that could protect the PLC from network bursts, “brute force” or DoS (denial of service) attacks.

The receive/transmit parts of the network driver are handled separately.

If Throttling is active (default) depending on the throttling method (which can be “bytes/second”, “packets/second” or both) every cycle (depends on CPU type, about 10 ms) the firmware decides, if the limits (Bytes per second limit or packets per second limit) are exceeded.

If this happens, the receiver or transmitter will ignore the data at least for 1 cycle and then calculates again.