PK Controller Ethernet I/O Port Download Behaviour

All,

     I have a PK controller with over 25 Ethernet I/O Physical Devices connected to it. Due to Controller Performance limits, I need to relocate one of these devices to another PK controller. Once I delete it from the former PK controller, most probably the Ehernet I/O Port will ask for a Download.

     What is it going to happen if I go ahead with the download of the Ethernet I/O Port? Will my other connections suffer from it? Will all my DOs/AOs drop to 0?

     Will a Download Changed Setup Data on the PK Controller remove the Ethernet I/O Port download requirement?

Your help is much appreciated,

Valentin