JVL Industri Elektronik A/S - User Manual - Ethernet for MAC and MIS motors 139
6.1 Introduction to PROFINET IO
The GSD file describes the device specific modules and the method of assigning modules
and sub-modules to predefined slots and sub-slots.
There is no theoretical limit for the amount of connected nodes in PROFINET IO net-
work, but in practice, the programmable controllers and number of available network
addresses limits the size. The PROFINET IO protocol is specified in the IEC standards
61158 and 61784.
Further information can be obtained from www.PROFINET.com.
6.1.2 Definitions and abbreviations
Following general used terms are useful to know before reading the following chapters.
100Base-Tx 100 MBit Ethernet on twisted pairs.
Acyclic communication Communication in which messages are sent once per request.
Cyclic communication Communication in which process data are sent cyclically at pre-
defined intervals.
DAP Device Access Point.
DCP Discovery and Configuration Protocol.
GSD General Station Description. Device description file in a speci-
fied form. Each device (active & passive stations) on PROFINET
has to have its own GSD File. GSD files in PROFINET are writ
-
ten in GSDML.
GSDML General Station Description Markup Language - is a XML based
language used for the device description file.
IO-Controller Control system with bus initiative. In PROFINET IO terminol-
ogy, IO-controllers are also called master stations.
IOPS IO Provider State (state of the provider of cyclic IO data).
IOCS IO Consumer State (state of the consumer of cyclic IO data).
IP Internet Protocol - IP address ~ the logical address of the de-
vice, which is user configurable.
MAC Media Access Controller - MAC address ~ the hardware ad-
dress of the device.
PZD Process Data
TCP Transfer Control Protocol (an IP based protocol used widely
on the internet)
UDP User Datagram Protocol (an IP based protocol used widely on
the internet)
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