As with most Massoth products, it is the documentation that lets it down, I would guess it is written by the engineers who know what it works like, not by a Tech Writer who will find problems and get resolutions and write them into the instructions. Again, instructions translated into English, but some definitions very obscure. Re the Mode Switch, I ended up calling the Hotline as I could not get the board to work, basically, I can not find any instructions re the Mode Switch in the instructions, and unless the cortrect position is selected, the board will not work.
A simple schematic of how to wire up the unit showing the Power source / transformer, the PC module, etc would certainly help as this would show what combinations of cabling could be achieved and what should not be done instead of basically saying incorrect wiring could seriously effect the unit. When should the update cable be used and when not, can I wire the PROG TRACK PC module to the PRG terminals and have the Update cable plugged in as well.