HUMAN-MACHINE INTERFACE HAVING MULTIPLE TOUCH COMBINATORIAL INPUT

A Human-Machine Interface (HMI) system comprises a user interface, a processing system, and a machine interface. The user interface displays a multi-state enable option graphic selectable by a first touch from a user, that, when the first touch is maintained, enables a multi-state mode of a state option graphic having a plurality of modes comprising a single-state mode and the multi-state mode, displays the state option graphic selectable by a second touch from the user, and receives the second touch from the user selecting the state option graphic. If the state option graphic is in the multi-state mode when selected, the processing system processes the second touch to select a state option from a plurality of state options corresponding to a plurality of operation states of a machine. If the state option graphic is in the single-state mode when selected, the processing system processes the second touch to select the state option from a single state option corresponding to a single operation state of the machine. The machine interface transfers a control instruction to operate the machine in an operation state corresponding to the state option.