I have often recommended James Powell’s Catching the Process Fieldbus: An Introduction to Profibus for Process Automation. It’s a great start to understanding PROFIBUS. I’ve even previously blogged about it as “Catching the Process Fieldbus.”
It’s been available at Amazon as a hardcover. And we’ve given some away as raffle prizes at one-day training classes. Now James has asked us to give away the book in eBook formats… for FREE to everyone! Pick you format and download it here.
Even better news: the second edition of the book includes PROFINET and should be available in June. Will it also be free? Check back and see.