Method of operating an agricultural system having a tractor and an implement, an agricultural system, and a computer program product

A method of operating an agricultural system having an implement connected to a tractor, the method comprising:

• connecting a tractor control network and an implement control network through a data bus of an agricultural system control network comprising the tractor control network and the implement control network;
• transmitting control signals over a signal line of the data bus between the tractor control network and the implement control network;
• providing a driving power supply by a tractor power supply to a working unit of the implement, the working unit being connected to the implement control network through a driving power supply line, the tractor power supply being configured to provide a plurality of different DC driving voltages;
• receiving driving power supply control signals in the tractor control network, the driving power supply control signals being sent from the implement control network over the signal line and indicating a present DC driving voltage which is selected for driving the working unit and is one of the plurality of different DC driving voltages;
• supplying the present DC driving voltage over the driving power supply line to the working unit;
• and
• operating the working unit by applying the present DC driving voltage.