How does Hart Communication Protocol Work? Check out the full blog post over at https://realpars.com/hart-protocol/ A small HART network can be formed with up to 63 HART devices, each having its address, or node number. The remote capability of HART sensors is very useful and powerful. We can access data in the sensor remotely using the HART communication protocol from the PLC programming software. We can configure, calibrate, and retrieve diagnostic data from a control room or other location wh