Keyence IV Series User Manual download pdf (Page 54)

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- IV Series User’s Manual (Field Network) -

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 eld bus (such as PROFIBUS), enabling you to

protect the existing assets without modifying the legacy system.

The following two types of communication standards exist for the PROFINET communication: PROFINET

CBA communication for data communications between processes and between I/O controllers, and

PROFINET I/O communication for data communications between the I/O controller and I/O device.

The PROFINET communication for the IV series supports the PROFINET I/O communication 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 eld 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 SendCycle

(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 IV series supports the data I/O communication provided by the real-time communications (RT).

PROFINET

communication

I/O controller

Normal

(Communication

cycle: 64

ms)

High-speed

(Communication cycle:

4* ms)

Low-speed (Communication cycle: 512

ms)

PROFINET

communication

I/O device

PROFINET

communication

I/O device

PROFINET

communication

I/O device

* If you congure the setting to "auto", the overall communication load will be adjusted and the

SendCycle (Communication cycle) will be set automatically.

PROFINET

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