A continuously variable powertrain device, for a work vehicle, to transmit a motive power from an engine to a travel device, the continuously variable powertrain device comprising: a continuously variable transmission configured to output a continuously shifted motive power while continuously varying a speed of the motive power received from the engine; a planetary transmission configured to receive the motive power from the engine and the continuously shifted motive power and to output a compound motive power; a planetary clutch mechanism configured to switch a shift level of the planetary transmission; a forward-reverse direction switcher configured to receive the compound motive power and to output either a forward motive power or a reverse motive power; a rotation detector group including a plurality of rotation detectors which detect an engine rotation speed, a continuously variable rotation speed, a composite rotation speed and a travel rotation speed, the engine rotation speed being an output rotation speed of the engine, the continuously variable rotation speed being a rotation speed of the continuously shifted motive power, the composite rotation speed being a rotation speed of the compound motive power, the travel rotation speed being a rotation speed of either the forward motive power or the reverse motive power; and a powertrain controller configured or programmed to: generate a control signal for controlling actuation of the continuously variable transmission, the planetary transmission, and the forward-reverse direction switcher based on a shift command with utilizing the engine rotation speed, the continuously variable rotation speed, the composite rotation speed, and the travel rotation speed; and function as a determiner to determine whether or not the rotation detector group is in an abnormal state, the determiner determining with utilizing at least one determination rule selected from a plurality of abnormality determination rules based on an operation condition with the planetary clutch mechanism and the forward-reverse direction switcher. a continuously variable transmission configured to output a continuously shifted motive power while continuously varying a speed of the motive power received from the engine; a planetary transmission configured to receive the motive power from the engine and the continuously shifted motive power and to output a compound motive power; a planetary clutch mechanism configured to switch a shift level of the planetary transmission; a forward-reverse direction switcher configured to receive the compound motive power and to output either a forward motive power or a reverse motive power; a rotation detector group including a plurality of rotation detectors which detect an engine rotation speed, a continuously variable rotation speed, a composite rotation speed and a travel rotation speed, the engine rotation speed being an output rotation speed of the engine, the continuously variable rotation speed being a rotation speed of the continuously shifted motive power, the composite rotation speed being a rotation speed of the compound motive power, the travel rotation speed being a rotation speed of either the forward motive power or the reverse motive power; and a powertrain controller configured or programmed to: generate a control signal for controlling actuation of the continuously variable transmission, the planetary transmission, and the forward-reverse direction switcher based on a shift command with utilizing the engine rotation speed, the continuously variable rotation speed, the composite rotation speed, and the travel rotation speed; and function as a determiner to determine whether or not the rotation detector group is in an abnormal state, the determiner determining with utilizing at least one determination rule selected from a plurality of abnormality determination rules based on an operation condition with the planetary clutch mechanism and the forward-reverse direction switcher. generate a control signal for controlling actuation of the continuously variable transmission, the planetary transmission, and the forward-reverse direction switcher based on a shift command with utilizing the engine rotation speed, the continuously variable rotation speed, the composite rotation speed, and the travel rotation speed; and function as a determiner to determine whether or not the rotation detector group is in an abnormal state, the determiner determining with utilizing at least one determination rule selected from a plurality of abnormality determination rules based on an operation condition with the planetary clutch mechanism and the forward-reverse direction switcher.