Using Fanuc system variables in a Teach Pendant program or background logic

I'm trying to learn things here but am getting misled a little bit.

I want to do a simple background logic code that tells me when the robot has been jogged, its just for learning not applying to any real life thing. Googling seems to show that the following is how you do it. "DO[30]=$MOR_GRP[1].$jogged"

But this line gives an error of parameter not found.

I was just playing around cause I thought I might want to know what USER frame the robot is in eventually so I could do some IF/THEN/ELSE.

Anybody clue me in? Is it to do with firmware or software? I'm using roboguide 9 to play around with.