KEYENCE DL-PN1 - Manual (Page 3)

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Overview of PROFINET
What is PROFINET?
PROFINET is an open industrial networking standard developed and maintained by the
PI (PROFINET International).
All supported devices can use the communication network regardless of the vendor.
PROFINET allows easy integration with the currently used field bus (such as
PROFIBUS), enabling you to protect the existing assets without modifying the legacy
system.
The PROFINET communication for the DL-PN1 series supports the PROFINET I/O
communication, which transmits data between I/O controllers (PLC etc.) and I/O
devices, and complies with Conformance Class A.
The PROFINET I/O communication offers the following two types of communication
methods for cyclic data: Real-time communication (RT) and isochronous real-time
communication (IRT).
Real-time communication provides similar communication performance as the existing
field bus, such as the device control in normal factory automation, using Ethernet. The
isochronous real-time communication is capable of meeting stringent real-time
requirements, including synchronized motion control.
The real-time communications offer the following two types of communications: Data I/O
communication for sending and receiving data periodically, and record data
communication for sending and receiving commands/responses at arbitrary timings. In
the data I/O communication, you can set the Update time (Communication cycle) based
on the priority of the data to be sent/received, enabling sending/receiving of data with
adjusted overall communication load. The record data communication is used for
communication applications that require little punctuality (unlike the data I/O
communication).
The DL-PN1 Series supports real-time data I/O communication and record data
communication.
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