For RIO Channel Group Objects the following rules apply to Servers.

RIOforFA:RIO Channel Group Objects shall be provided always if the Cyclic IO Telegram model is provided by the Server. RIO Channel Groups could be used for lightweight modelling of digital multichannel I/O submodules when the RIO Channel Objects are omitted and only the I/O image Variables are used.

RIOforPA:RIO Channel Group Objects could be used if logical grouping of channels shall be done for asset relations on the RIO aspect side if the PROFINET aspect is omitted.

General:Servers may always provide RIO Channel Group Objects, independent from the conditions mentioned above.