Monochrome displays:

In PowerVision Configuration Studio, Connections -> Device, if the Request Specific box is checked, the display/controller will send requests to the global address (xFF) and the Source Address for the Device. It will not however change to the Source Override, if it is changed to something other than the Source Address setting.

This problem is limited to the requests sent as a result of checking the Request Specific box.

The problem is fixed in the next release of the PowerVision Configuration Studio 2.8.