integer :: TopDriveTdsPowerState
        logical :: TopDriveTorqueWrench
        integer :: TopDriveDrillTorqueState
        integer :: TopDriveLinkTiltState
        logical :: TopDriveIbop
        real :: TopDriveTorqueLimitKnob
        real :: RpmKnob
        integer :: TopDriveOperationFaultLed
        integer :: TopDriveTdsPowerLed
        integer :: TopDriveTorqueWrenchLed
        integer :: TopDriveLinkTiltLed
        integer :: TopDriveIbopLed
        real :: TopDriveTorqueLimitGauge
        real :: TopDriveTorqueGauge
        real :: TopDriveRpmGauge