What is one of the main functions of field controllers?

Field controllers play an essential role in industrial automation by managing the inputs and outputs (I/O) associated with various field devices. Their primary function is to collect data from these devices, such as sensors and actuators, and process this information to ensure efficient operation of plant processes. This involves interpreting signals, executing control algorithms, and sending commands to the I/O systems based on real-time data.

While field controllers may engage with third-party applications, facilitate communication, and store certain types of data, their main emphasis remains on I/O processing, which is critical for real-time monitoring and control in industrial settings. This direct handling of inputs and outputs makes them integral to operational effectiveness in industrial control systems.