I couldn't find anything in the tool that cotrolls the MG shutdown. I couldn'd find anything in the adjusting manual. there must be something there that times out the generator when there is no demand.
FYI I found what I needed. MG shutdown is an internal timer set to 6 min. not adjustable. The feature only works when the car is on normal, so if the inservice switch at the panel is off the MG never shuts down.