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PROmesh P9 - User Manual
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Leakage current
The Leakage Current Monitoring (Figure 13) makes it possible to permanently record and evaluate the sum
of all shielding currents of the PROFINET lines that are dissipated via the device into the equipotential
bonding system. The corresponding spectrum with the respective frequency components is specified for
this in addition to the current value. Using this function, the PROmesh series also offers mechanisms for
detecting EMC interference or couplings.
Further functions for this are:
•
Download of the frequency spectrum after a threshold value was exceeded
•
Switching the axes between a decimal and a logarithmic scaling
Figure 13: Leakage Current
Link Layer Discovery Protocol (LLDP)
– Topology
The LLDP topology presents the neighbouring devices by ports with IP addresses and description (see
Figure 14). The Link Layer Discovery Protocol (LLDP) is a manufacturer-independent Layer-2 protocol
which provides the possibility to exchange information (addresses, names and descriptions) between
neighbouring devices.
An LLDP agent is running on every device that supports LLDP. This sends information about the own status
in periodic intervals and receives information from the neighbouring devices.
Since this takes place independently from each other, the LLDP is also termed a one-way protocol.
The following information is compiled and sent by the LLDP:
•
System name
•
System description
•
Port description
