Specifications

214 GX Configurator-PN

Remote Procedure Call (RPC)

This protocol is based on TCP/UDP. It is used to execute the connection phase to an IO-Device to-

gether with all data block read/write accesses.

Real Time Acyclic (RTA)

This protocol is based on Ethernet (level 2). This protocol is used to exchange alarms between the

IO-Device and the IO-Controller.

Real Time Cyclic (RTC)

This protocol is based on Ethernet (level 2). This protocol is used to exchange cyclic input/output

data.

Addressing of PROFINET components on the Ethernet network

The DCP protocol is used to detect the presence of a PROFINET station on the network. DCP is a

layer 2 protocol (Ethernet). For this reason it does not use IP addressing to find PROFINET com-

ponents, but their PROFINET name. One of the features of the PROFINET protocol is that each

PROFINET component must be named. This name is known as its PROFINET name (DCP Name).

Then once the component has been identified on the network, DCP gives the option of assigning the

IP configuration of the IO-Device. This addressing is mandatory as PROFINET uses TCP/UDP and

IP layers.

When a PROFINET network is installed, the first thing to do is to name all the IO-Devices present on

the network uniquely. This task can be carried out using the 'Online Action Tool' in GX Configurator-

PN.

A newly-wired PROFINET network:

Note that at startup, each IO-Device has the same name and same IP address.

A PROFINET network with IO-Devices named correctly from the engineering tool: