The Industrial Raspberry Pi Forum

I am busy with a project in which our device needs to act as a profibus slave, but only on FDL network layer level (OSI level "Data link" layer - https://en.wikipedia.org/wiki/Profibus). Is it possible to use the Kunbus Profibus Slave module and bypass/disable the DP layer and have an interface directly at the FDL layer level?

Hi dwjbosman, unfortunately this is not possible. The Modular Gateway Profibus Slave Module is a certified product that uses the integrated Profibus VPC3+S chip.
But maybe you can use a RS485 interface and a Profibus stack that you may adapt according to your needs. I have found this stack: https://pypi.org/project/pyprofibus/
Maybe it is the appropriate solution for your project. But have a look at the license if you wish to use and modify it.
The RevPi Connect/+ has an RS485 interface onboard which is accessible via "/dev/ttyRS485".