Abstract: In a method for transmitting data in an HVDCT system to a control system for HVDCT systems, measured values are transmitted from measuring units of the HVDCT system to preprocessing units connected to one another in series. The preprocessing units use the received measured values to generate measured value data. The measured value data are transmitted as part of a data record composed of data words, and the data words are subdivided, during transmission, into a temporal sequence of individual bit groups. A first bit group contains identification data for the preprocessing unit and information on the number of further bit groups that are to be transmitted by the preprocessing unit. A downstream preprocessing unit uses the information on the number of bit groups to be transmitted by a preprocessing unit connected upstream of it to determine a time for transmitting the data word of the downstream preprocessing unit.

Abstract: In a method for transmitting data in an HVDCT system to a control system for HVDCT systems, measured values are transmitted from measuring units of the HVDCT system to preprocessing units connected to one another in series. The preprocessing units use the received measured values to generate measured value data. The measured value data are transmitted as part of a data record composed of data words, and the data words are subdivided, during transmission, into a temporal sequence of individual bit groups. A first bit group contains identification data for the preprocessing unit and information on the number of further bit groups that are to be transmitted by the preprocessing unit. A downstream preprocessing unit uses the information on the number of bit groups to be transmitted by a preprocessing unit connected upstream of it to determine a time for transmitting the data word of the downstream preprocessing unit.

Abstract: The value of the absolute seat height may be formed from the sum of a first, stationary basic component and a second, quasi-stationary regulation component. The value of the regulation component may be adjusted, independent of the weight of a person resting on the seat, in such a way that it takes on the value of a reference value that corresponds to the height of a person resting on the seat, at least on the average over time. Preferably, a regulation mechanism activates the height adjustment device in steps, in the form of activation steps. Preferably, the activation periods are furthermore increased or decreased by a time component, if the previous activation step caused an overly small or overly large lift.

Abstract: A coal-cutting machine (1) having an all-round swivelling jib boom (6), on which cutting implements (17) are rotatably supported, and a loading platform (3) comprising a loading platform which can swivel about an axis (4) extending transversely to the longitudinal direction of the machine. The loading platform (3) is angularly, rigidly connected to the swing gear (5) for the swivelling of the jib boom (6) in a horizontal direction and is supported on the machine frame (1) so as to swivel, together with the swing gear (5), about the axis (4) extending transversely to the longitudinal direction of the machine. As a result of this construction which a particularly low overall height is made possible while safely preventing a collision between the jib boom (6) and the loading platform (3).