Hi Everybody,
I am trying to build a positioner with Foundation Fieldbus support.
The system architecture would consist of:
a. Analog In (4 - 20 mA for position set-point input in manual mode).
b. Analog Out (4 - 20 mA position output to the pneumatic block).
c. Microcontroller to implement the PID control loop with support for Foundation Fieldbus. (The primary role of the Foundation Fieldbus interface is to accept the position set-point and to provide the current position feedback in auto mode.)
I would like to know of any popular/standard microcontroller that offers:
- The required peripherals to implement a Foundation Fieldbus solution. (Preferably a dedicated peripheral such as a serial port for Foundation Fieldbus.)
- The complete Foundation Fieldbus software stack.
- A reference design showing how the microcontroller that implements the PID loop is interfaced to the physical layer.
I have tried searching for these type of microcontrollers on the internet with few meaningful results.
I observe that there are some "ASICs" offered by a few not-so-popular vendors that contain:
- The dedicated Foundation Fieldbus controller. 2. Microcontroller interface. 3. The MAU or PHY interface.
Any comments on why the big players do not offer something similar or a full-fledged solution?
Thank you for you for your help.
Thanks, Anand