Abstract: A control system for a large round baler includes a microprocessor-based implement module mounted to the baler and an input device mounted within the cab of the tractor behind which the baler is towed. The implement module receives inputs from the input device for setting and/or adjusting parameters of baler operation. Sensors are interconnected with various components of the baler for sensing operation of such components, and provide signals to the implement module indicative of baler operations. The sensor signals are analyzed by the microprocessor of the implement module, and various operations of the baler are controlled responsive to the sensor inputs.