Siemens PROFINET SIRIUS 3RW5 - Page 206

GSDML 󹪝le
The properties of a PROFINET device are described in a GSD (General Station Description or
device master data) 󹪝le. You can link a PROFINET device into an automation system via the GSD
󹪝le. The GSD 󹪝le contains all information required for con󹪝guration.
In the case of PROFINET IO, the GSD 󹪝le is in XML format and will therefore be referred to as a
GSDML 󹪝le in this documentation. The structure of the GSDML 󹪝le conforms to ISO 15734, the
worldwide standard for device descriptions.
H-Sync forwarding
H-Sync forwarding allows a PROFINET device with MRP to forward synchronization data
(synchronization frames) of a redundant S7-1500R system only within the PROFINET ring.
I&M data
Identi󹪝cation and maintenance data.
Information stored in a module that helps you to check the plant con󹪝guration, to locate
hardware modi󹪝cations in a plant, or to remedy faults in a plant. I&M data enable modules to be
uniquely identi󹪝ed online.
IP address
To enable a PROFINET device to be addressed as a node on Industrial Ethernet, the PROFINET
device requires an IP address that is unique within the network. The IP address is made up of
4 decimal numbers with a range of values from 0 through 255. The decimal numbers are
separated by a decimal point.
The IP address is made up as follows:
• Address of the (sub)net
• Address of the station (host or network node)
IRT (Isochronous Real-Time Communication)
Synchronized transmission method for the cyclic exchange of IRT data between PROFINET
devices. A reserved bandwidth within the send clock is available for the IRT data. The reserved
bandwidth guarantees that the IRT data can be transmitted una󹪜ected by other, high network
loads (e.g. TCP/IP communication or additional real-time communication) in reserved, time-
synchronized intervals.
LLDP
LLDP (Link Layer Discovery Protocol) is a protocol that allows the next neighbor to be detected.
LLDP enables a device to send information about itself and receive information from
neighboring devices.
Glossary
SIRIUS 3RW5 PROFINET communication modules
206 Equipment Manual, 05/2021, A5E35631297002A/RS-AD/004