Specifications

213Appendix

11. confirm that after a while both RUN and USER LEDs turn off and the MODE LED flashes green

Note: for the following steps the controlling Qn-CPU can be inserted into the PLC rack and the

PROFINET Controller module can be moved to the slot next to it, after power has been turned off.

Activate the PROFINET functionality on the ME1PN1FW-Q with these operations

1. insert the CF card with the PROFINET I/O software and reset the module.

2. wait, until the 7-segment LED shows 'AA'

3. start GX Configurator-PN and download the configuration (this includes setting the IP address from

the default setting 192.168.3.3 to the address assigned in the GX Configurator-PN project)

9.2 Introduction to PROFINET IO

PROFINET is an industrial communications protocol based on Ethernet which was created by

PROFIBUS International. Depending on the tasks to be carried out, PROFINET uses different com-

munication layers of the OSI model:

Layer 4 (transport): "TCP/UDP" for all configuration exchanges.

Layer 2 (Link): "Ethernet" for process data exchanges such as inputs/outputs and

alarms.

The network controller is called the IO-Controller (Master) and the Devices called IO-Device (Slave).

With PROFINET, different network topologies may be realized. The most common are the star and

the bus.

Protocols Used by PROFINET

Discovery and basic Configuration Protocol (DCP)

This protocol is based on Ethernet (level 2). Amongst other things it enables the presence of an IO-

Device to be detected on the network and its IP configuration to be read or written. This protocol will

be mainly used in two phases:

Network configuration: assignment of names and IP addresses to the IO-Devices.

Establishing a connection: detection of the presence of the IO-Device and the control/adaptation of

its IP address