10 years ago
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:
1. The required peripherals to implement a Foundation Fieldbus
solution. (Preferably a dedicated peripheral such as a serial
port for Foundation Fieldbus.)
2. The complete Foundation Fieldbus software stack.
2. 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:
1. 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
Thank you for you for your help.