Figure 57 - Link Layer Discovery Protocol (Lldp); Encoder Replacement Using Lldp - Datalogic AMT58*-PN Series Instruction Manual

AMT58x-PN ProfiNET®

12. Encoder replacement using LLDP

LLDP (Link Layer Discovery Protocol) is a Layer 2 protocol that is
used to detect the closest neighbors in the network. It enables a
device to send information about itself and to save information
received from neighboring devices, i.e. it provides the option of
communicating data between neighboring devices (e.g. device name,
port, MAC address). This information allows a network management
system to determine the network 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.
To activate / deactivate the function double click the PN-IO slot X2 to
open the PN-IO properties dialog box. The Properties – PN-IO
property sheet will appear. Enter the General tabbed page to find the
Support device replacement without exchangeable medium check
box. Please note that the Support device replacement without
exchangeable medium function is activated by default in the IO
controller.

Figure 57 - Link Layer Discovery Protocol (LLDP)

NOTE
When you replace a device, make sure that the PROFINET cable is
then inserted into the correct port as it is configured in STEP 7.
Otherwise, the system will not run.
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