1.2. Overview of PROFINET IO

1.2. Overview of PROFINET IO

 

PROFINET IO is an Ethernet-based open-type industrial communication protocol that has progressively evolved from PROFIBUS-DP and industrial Ethernet. It conforms to the provider/consumer model for data exchange and can be subdivided into three classes of product groups, namely, IO-Controller, IO-Device, and IO-Supervisor.

 

 

Figure 1.1 PROFINET IO communication connect

 

(1)   IO-Controller

Equivalent to the existing PROFIBUS-DP Class1 Master and is operated by an automated program along with PLC. IO-Controller provides output data to the IO-Devices that are assigned to it and consumes data inputted by the IO-Devices.

 

(2)   IO-Device

Equivalent to the existing PROFIBUS-DP Slave and is connected through PROFINET IO to the IO-Controller along with PLC. IO-Devices provide input data to IO-Controller and consume data outputted by IO-Controller.

 

(3)   IO-Supervisor

Equivalent to the existing PROFIBUS-DP Class 2 Master, and is composed of programming device, PC, HMI, etc., for the purpose of network configuration and diagnosis.