STOBER
Glossary
11/2019 | ID 442710.03
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Glossary
100Base-TX
Ethernet network standard based on symmetrical copper cables in which the nodes are connected to a switch via
copper cables twisted in pairs (shielded twisted pair, CAT 5e quality level). 100Base-TX is the subsequent progression
from 10Base-T and includes those properties with the option of a transfer speed of 100 Mbps (Fast Ethernet).
Broadcast domain
Logical grouping of network devices within a local network that reaches all nodes via broadcast.
General station description file
Includes the technical features of a PROFINET IO device (type, configuration data, parameters, diagnostic information,
etc.) in XML format in accordance with the GSDML specification. A GSD file serves as the configuration basis for project
configuration systems and is generally provided by the respective device manufacturer.
IO controller
Generally, a programmable logic controller that controls automation tasks and regulates data communication.
IO device
A decentralized field device that is assigned logically to a PROFINET IO controller that manages and controls it.
An IO device consists of multiple modules and submodules.
IO supervisor
Generally, engineering software that can access all process and configuration data. An IO supervisor is only engaged
temporarily for parameterizing the IO devices, commissioning the IO system and for diagnostic purposes.
IPv4 limited broadcast
Type of broadcast in a network with IPv4 (Internet Protocol version 4). The IP address 255.255.255.255 is entered as
the destination. The content of the broadcast is not redirected by a router, which limits it to the local network.
MAC address
Also: Ethernet address. Hardware address for unique identification of a device in an Ethernet network.
The MAC address is assigned by the manufacturer and consists of a 3-byte manufacturer ID and 3-byte device ID.
System function block
Logic block as part of a distributed, structured Siemens user program used to call up important system functions for
PROFINET IO. Parameters for the associated input and output interfaces can be configured individually. The variable
values stored in a function block are saved and are not lost after processing. Typical Siemens system function blocks
are WRREC (Write record) and RDREC (Read record).