When you unplug a node the eCAT network will fault and stop communicating. This will shut your equipment down. You will need to program a eCAT network reset routine in your program to allow for the network to reset when a node is hooked back up. The manual is correct and you probably will want the node disconnect feature added if you are going to disconnect and connect nodes. This will allow the network to continue to operate if the node is disconnected. Just watch your topology. The network feeds through nodes so these will need to be at the end of a branch or on its own.
