• SANDEEP JADHAV
• Pawan K. Gaikawad

The HART (highway addressable remote transducer) protocol is extensively employed in industrial applications due to its ability to transmit both digital and analog data over a single communication bus. It is used for monitoring of different types of input such as pressure, flow, level. It gives simultaneous 2 channels for communication one is analog process value in the form of 4mA to 20mA and another is digital FSK modulated signal which contain all sensor process value, configuration details and diagnostic data. FSK modulated signal uses very low Frequency of 1200 Hz and 2400 Hz with small AC amplitude so it cannot interference with DC current signal. While designing of HART converter required hardware components such as a microcontroller, communication IC, power supply, Isolation transformer unit etc. With dedicated peripheral interfaces for HART communication. HART protocol is implemented in microcontroller which can able to transmit and receive HART Frame, after receiving HART Frame this converted in to readable values by applying in IEEE 754 float format conversion. The converter implements handling of point to point and multi-drop configurations. As HART is master slave architecture which support 2 Master on same bus with maximum 15 slave, to synchronise this we need to implement different timers such as response timer, turnaround delay timer, response time limit timer, and token-passing timer for smooth and healthy communication of HART between slave and both master. [1]

HART protocol, Microcontroller, Serial Communication, FSK Modulation, Analog output.

"DESIGN AND DEVELOPMENT OF HIGHWAY ADDRESSABLE REMOTE TRANSDUCER (HART) CONVERTER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 2, page no.a154-a159, February-2025, Available :http://www.jetir.org/papers/JETIR2502023.pdf

"DESIGN AND DEVELOPMENT OF HIGHWAY ADDRESSABLE REMOTE TRANSDUCER (HART) CONVERTER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 2, page no. ppa154-a159, February-2025, Available at : http://www.jetir.org/papers/JETIR2502023.pdf