Maxsine EP3 E Series - Chapter 6 Communication Function; PROFINET Communication; Profinet Io

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Chapter 6 Communication function
6.1 PROFINET communication
PROFINET communication consists of PROFINET IO and PROFIDrive.
6.1.1 PROFINET IO
PROFINET, launched by PFOFIBUS International (PI), is a new generation automation
bus standard based on industrial Ethernet technology.
Communication between the PROFINET network and external devices is realized by
PROFINET IO, which defines complete data exchange, parameter setting and diagnostic
functions between the master controller and other slave devices, as shown in the figure below.
A complete PROFINET IO network includes the following devices:
 IO controller: Used to control the operation of the entire system (for example, PLC).
 IO device: Typically a field device (for example, a driver, encoder, sensor, etc.) that is
controlled and monitored by an IO controller. An IO device may consist of several
modules or submodules.
 IO monitoring: HMI(Human machine interface) or a PIECE of PC software for diagnosis
and debugging.
PROFINET provides two kinds of real-time communication, PROFINET IO RT and
PROFINET IO IRT.
 PROFINET IO RT channel priority Ethernet frames for transmission of real-time data, no
special hardware requirement, based on the priority level, its cycle can reach 4 ms.
 PROFINET IO IRT channel is suitable for data transmission has a more precise time
requirement, the cycle of up to 250 us, but need to have special hardware support IO
device and switches.