Datalogic AMT58 Series, Manual

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AMT58...PN
CHAPTER 11
ENCODER REPLACEMENT USING
LLDP
LLDP (Link Layer Discovery Protocol) is a Layer 2 protocol that is used to detect the clos -
est neighbours in the network. It enables a device to send information about itself and
to save information received from neighbouring devices, i.e. it provides the option of
communicating data between neighbouring devices (e.g. device name, port, MAC
address). This information allows a network management system to determine the net -
work topology. The protocol is formally referred to by the IEEE as Station and Media
Access Control Connectivity Discovery specified in standards document IEEE 802.1AB.
Among the main uses, LLDP allows to replace a device of the Profinet network.
The partner ports before and behind the replaced device save the relevant information
so that no additional configuration is necessary. The flag
Support device replacement
without exchangeable medium must be activated in the Controller.
When you need to activate / deactivate the Support device replacement without
exchangeable medium
function in the IO controller, proceed as follows:
1. In the Device or Network view of TIA Portal select the PROFINET interface of the
corresponding IO controller. The properties of the PROFINET interface are dis -
played in the inspector window.
2. In the Properties of the PROFINET interface, under
Advanced options
>
Interface
options enable Support device replacement without exchangeable medium .
Figure 1. Link Layer Discovery Protocol (LLDP)