I came across this post
http://forum.moogmusic.com/viewtopic.php?f=7&t=19588&p=120034
Which had this line
I also added a “send all parameter MIDI values” command… it’s NRPN #0 value 127…
so to trigger sending all parameter values, send CC# 99 value 0, followed by CC#6 value 127.
But I can’t seem to find any other documentation on it and it doesn’t seem to work. Was this function removed? Would be nice not to have to use sysex.