Specifications

215Appendix

Note that all the IO-Devices present have a unique name (sensor.stage1, sensor.stage2 and pro-

be.tank1). However, the IP addresses of these IO-Devices remain set to 0.0.0.0.

During a connection phase, the IO-Controller starts by searching for an IO-Device using a multicast

request commonly called "identify". When the IO-Device replies, the IO-Controller checks if the IP

parameters of the IO-Device are definitely those configured. If not, then the IP-Controller assigns the

correct IP configuration to the IO-Device. Once this sequence has been completed, the IO-Controller

will be able to establish a connection with the IO-Device.

A PROFINET network with IO-Devices connected to an IO-Controller: