Industrial Communication Systems

40-1

40.1 Introduction

PROFINET is the real-time (RT) Ethernet solution developed by PROFIBUS International (PI), the world

association of PROFIBUS and PROFINET manufacturers and users. e PROFINET protocol is an inter-

national standard since it has been incorporated in the current edition of the IEC 61158 and IEC 61784

standards. In details, the IEC61784 denes the subsets of the services specied in IEC 61158 that are to be

applied for PROFINET under the designation “Family 3” with subdivisions 3/3, 3/4, 3/5, and 3/6.

From

the

abstract

point

of

view,

the

PROFINET

concept

is

a

modular

concept

that

allows

the

user

to

choose

the

functionalit