Dr. Johannes Heidenhain Gmbh

Bernhard Beaury

Markus Mooshammer

Stephan Kreuzer

Michael Walter

Alexander Kobler

Erich Strasser

Sebastian Tondorf

Hermann Hofbauer

Thomas Fleischmann

Ernst Thielicke

Daniel Schenzinger

Heik H Hellmich

Peter Spindler

A position-measuring device includes a position-sensing unit, a processing unit, an interface unit, a clock generator and a time measurement unit position-sensing unit configured to generate digital position values. The processing unit processes instructions from subsequent electronics. The interface unit communicates with the subsequent electronics, according to rules of an interface protocol, via at least one interface line that transmits interface signals having a temporal behavior that is determined by the interface protocol so as to transmit the instructions from the subsequent electronics to the processing unit. The clock generator generates a clock signal that serves as a time base for functions of the position-sensing unit and the processing unit. The time measurement unit uses the clock signal as a time base, receives at least one interface signal and measures a time interval between a start event and a stop event of the at least one interface signal.

Position-measuring device and method for testing a clock signal

A method generates an asynchronous trigger signal in a position-measuring device having a position-sensing unit, a processing unit and an interface unit. The position-measuring device is connectable via the interface unit and a bidirectional data channel to subsequent electronics for communication purposes. A synchronous data stream is generated from an asynchronous data stream arriving at the position-measuring device from a direction of the subsequent electronics by sampling the asynchronous data stream in a time pattern of a clock signal. A gate signal is generated upon an enable condition for outputting the trigger signal being detected by evaluating the synchronous data stream. The asynchronous trigger signal is generated upon the gate signal being present and a signal edge of the asynchronous data stream occurring.

Device and method for generating a trigger signal in a position-measuring device and corresponding position-measuring device

In a device and a method for transmitting energy and data between a control unit and a position-measuring device via a line pair, the energy transmission takes place in a charge mode and the data transmission takes place in a communication mode, and an energy storage device is provided in the position-measuring device, which is able to be charged in the charge mode via the line pair, and which is able to supply energy to the position-measuring device in the communication mode, and a charge unit and a switching device are provided in the control unit. The switching unit is adapted to the charge unit to the line pair in two-pole manner.

Device and method for transmitting energy and data between a control unit and a position-measuring device

A method for serial data transmission between a position-measuring device and subsequent electronics over a bidirectional data channel includes transmitting data in data frames and in encoded form in accordance with a data transmission code. The data transmission in each case is initiated by an interface unit at a transmitter end with a start sequence having an encoding scheme that at least partially differs from an encoding scheme of a remainder of the data frames. After a reversal of data direction, an interface unit at a receiver end detects a beginning of the data transmission in each case by detection of the start sequence.

Method and device for serial data transmission over a bidirectional data channel

A method for transferring data between a position-measuring device and an associated processing unit includes transferring first data having a first priority in successive cycles from the position-measuring device to the processing unit. The successive cycles are in each case initiated by a request command by the processing unit requesting the first data from the position-measuring device. Second data having a second, lower priority is transferred from the position-measuring device to the processing unit in at least a portion of the successive cycles with the first data. Types of the second data being transferred in a respective one of the successive cycles are variable. At least one particular type, of the types of the second data to be transferred, is assigned to individual cycles of the successive cycles using information stored in the position-measuring device without involvement of the processing unit.

Method for transferring data between a position-measuring device and an associated processing unit and position-measuring device therefor

In a device and a method for serial data transmission between a position-measuring device and a control unit, made up of an interface unit on the control side and an interface unit on the measuring-device side, which are connected to each other for the transmission of serial data packets with the aid of a bidirectional data channel, the interface unit on the control side includes a control-side transmitter unit for transmitting serial data packets via the data channel to a measuring-device-side receiver unit disposed in the interface unit on the measuring-device side. The interface unit on the measuring-device side includes a measuring-device-side transmitter unit for transmitting serial data packets via the data channel to a control-side receiver unit disposed in the interface unit on the control side. Data packets transmitted by the control-side transmitter unit include a clock sequence at the beginning, from whose time characteristic it is possible to derive the frequency of a control-side transmitter clock signal underlying the transmission. The receiver unit on the measuring-device side includes a measuring-device-side clock-recognition unit which evaluates the clock sequence and, in order to read in control-side output data included in the data packet, generates a measuring-device-side receiver clock signal, whose frequency corresponds to a great extent to that of the transmitter clock signal on the control side.

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Uebersee, Germany

Bernhard Beaury