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Glossary
GSD file
As a Generic Station Description, this file contains all properties of a PROFINET device that
are necessary for its configuration in XML format.
I/O modules
All modules that can be operated with a CPU or an interface module.
Identification data
Information that is saved in modules and that supports the user in checking the plant
configuration and locating hardware changes.
Interface module
Module in the distributed I/O system. The interface module connects the distributed I/O system
via a fieldbus to the CPU (IO controller) and prepares the data for and from I/O modules.
LLDP
LLDP (
standard IEEE-802.1AB. As a manufacturer-independent Layer-2 protocol for the recognition
of the topology in a network it serves to transfer information to neighboring devices.
Devices that support LLDP send device-specific information via an LLDP agent (software
component) to the multicast address 01:80:C2:00:00:0E with the type 0x88C at periodic
intervals. Neighboring LLDP-compatible devices store received information in the
Management Information Base (MIB) and thus recognize neighboring devices.
Load current supply
Supply of modules like the interface module, power supply modules, I/O modules, and (if
applicable) sensors and actuators.
MAC address
Device identification unique worldwide, which is already assigned to each PROFINET device
in the factory. Its 6 bytes are divided into 3 bytes for the manufacturer ID and 3 bytes for the
device ID (serial number). The MAC address is usually legible on the device.
Module fault
Module faults can be external faults (e.g. missing load voltage) or internal faults (e.g. processor
failure). Internal faults always require module replacement.
Node
Device that can send, receive or amplify data via the bus, e.g. IO device via PROFINET IO.
158
Link Layer Discovery Protocol ) is a network protocol that is described in the international
Commissioning Manual, 07/2018, A5E39252870-AC
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