As this is my first message probably will make some mistakes... anyway I am continuing my message at the bottom of this top message HI Friends.. it looks I will have to start again something similar to this thread there is a friend with problems with an old TSX17 PLC based system to control his painting service, it is based on this PLC, the program should be basic is just confirming that the door is closed and the vent is on and the pressure is appropriate etc. the program comes from a freaking company in France "SECOMAT" that I have requested information from and they only wanted to send their people to come to assist my friend and its "information " is "confidential" Anyway after reading most of the long thread with a lot of trial and errors, I guess one of you could summarize the steps to access the TSX17 from a standard windows 7 computer if possible to see what is happening. the top and bottom left indicator LEDS are alternating on and off all the inputs have its red led ON no more leds are on Regards G Lopez, California