I'm just flushing out the last of the bugs in my custom control panel and found this one........

I have a quadrature encoder connected to a Pokeys 57E, this is configured as MPG0. I have a brain that redirects the output to Feed Ovrd (821)

This seems to work just fine when Mach is not moving anything, however if I enter say G01 X5 F2 into the MDI  so the table is moving and I then try to tweak the feedrate using the encoder, no change. Further if I open the brain the MP0 Velocity DRO displays 0 while I'm moving the encoder as if MPG0 is either locked out or being ignored while the G01 command is executing. As soon as the table stops the barin starts showing activity again and I can adjust as desired.

Using the GUI I can adjust the feed rate up and down with the +/- arrows above FRO, but attempting to enter a new FRO value from the keyboard is ignored.  

Is there possibly a configuration selection that enables/disables changing the FRO while in motion?