METHOD FOR DATA COMMUNICATION

Abstract

In a method for data communication between a control unit and a drive system, the control unit and the drive system are connected to one another, preferably via a bus, in such a manner that data is transmitted by a telegram. The telegram includes an instruction which can be configured for recording and includes an identifier. At least one actual value, preferably a plurality of actual values, and/or of an actual value sequence, preferably a plurality of actual value sequences, of the drive system, are recorded through the instruction for recording, and at least one defined actual value from a plurality of actual values and/or recording at least one defined actual value sequence from a plurality of actual value sequences can be recorded through the identifier.

Claims

1-11. (canceled)

12. A method for data communication between a control unit and a drive system, the method comprising: connecting the control unit and the drive system to one another, preferably via a bus; transmitting data between the control unit and the drive system by a telegram, wherein the telegram comprises an instruction configurable for recording and comprising an identifier; recording at least one actual value, preferably a plurality of actual values, and/or of an actual value sequence, preferably a plurality of actual value sequences, of the drive system, through the instruction for recording; and recording at least one defined actual value from a plurality of actual values and/or recording at least one defined actual value sequence from a plurality of actual value sequences through the identifier.

13. The method of claim 12, further comprising distributing the telegram at predetermined or predeterminable points in time.

14. The method of claim 12, wherein the telegram includes a plurality of instructions, with at least one instruction being a control word.

15. The method of claim 12, wherein the telegram includes a plurality of instructions, with at least one instruction being an instruction about a behavior of the drive system.

16. The method of claim 12, wherein through the identifier, a defined sampling rate of a recording from a plurality of sampling rates and/or a defined recording duration from a plurality of recording durations is caused.

17. The method of claim 12, wherein the defined actual value and/or the defined actual value sequence are assigned to the identifier, preferably under remote control, in particular by means of cloud computing, during ongoing operation of the drive system.

18. The method of claim 16, wherein the defined sampling rate and/or the defined recording duration are assigned to the identifier, preferably under remote control, in particular by means of cloud computing, during ongoing operation of the drive system.

19. The method of claim 12, wherein after recording of the actual value, a recorded actual value, and/or after recording of the actual value sequence, a recorded actual value sequence, is stored, in particular by means of cloud computing.

20. The method of claim 12, further comprising storing the identifier, in particular by means of cloud computing.

21. The method of claimed 19, further comprising comparing the recorded actual value and/or the recorded actual value sequence with a further actual value of a further recording and/or of a further recorded actual value sequence of the further recording.

22. A system, comprising: a control unit; a drive system; and a system for data transmission, preferably a bus, connecting the control unit and the drive system to one another; wherein the system is configured to transmit data between the control unit and the drive system by a telegram, wherein the telegram comprises an instruction configurable for recording and comprising an identifier; to record at least one actual value, preferably a plurality of actual values, and/or of an actual value sequence, preferably a plurality of actual value sequences, of the drive system, through the instruction for recording; and to record at least one defined actual value from a plurality of actual values and/or recording at least one defined actual value sequence from a plurality of actual value sequences through the identifier.

23. The system of claim 22, wherein the system is configured to distribute the telegram at predetermined or predeterminable points in time.

24. The system of claim 22, wherein the instruction is a control word.

25. The system of claim 22, wherein the telegram includes a plurality of instructions, with at least one instruction being an instruction about a behavior of the drive system.

26. The system of claim 22, wherein through the identifier, a defined sampling rate of a recording from a plurality of sampling rates and/or a defined recording duration from a plurality of recording durations is caused.

27. The system of claim 22, wherein the defined actual value and/or the defined actual value sequence are assigned to the identifier, preferably under remote control, in particular by means of cloud computing, during ongoing operation of the drive system.

28. The system of claim 26, wherein the defined sampling rate and/or the defined recording duration are assigned to the identifier, preferably under remote control, in particular by means of cloud computing, during ongoing operation of the drive system.

29. The system of claim 22, wherein after recording of the actual value, a recorded actual value, and/or after recording of the actual value sequence, a recorded actual value sequence, is stored, in particular by means of cloud computing.

30. The system of claim 22, wherein the system is configured to store the identifier, in particular by means of cloud computing.

31. The system of claim 29, wherein the system is configured to compare the recorded actual value and/or the recorded actual value sequence with a further actual value of a further recording and/or of a further recorded actual value sequence of the further recording.

Description

[0038] The system is explained in the description of the figures.

[0039] The invention will be explained and described in greater detail below with the aid of the exemplary embodiments shown in the figures. In the figures:

[0040] FIG. 1 shows a system having a control unit and a drive system,

[0041] FIG. 2 shows an example of a method sequence,

[0042] FIG. 3 shows examples of parameters for the identifier,

[0043] FIG. 4 shows a change of an ID assignment.

[0044] FIG. 1 shows a system, having a control unit 1 and a drive system 2. The control unit 1 and the drive system 2 are connected to one another via a system for data transmission, preferably via a bus 6.

[0045] The drive system 2 comprises a converter 21 and also a dynamoelectric machine 22. The dynamoelectric machine 22 is preferably a dynamoelectric rotating machine, in particular a motor. However a linear motor is also possible in the arrangement shown.

[0046] The system makes it possible to carry out a method shown in FIG. 2.

[0047] The control unit 1 is preferably a Programmable Logic Controller (PLC for short) or another unit for control of movements. The control unit 1 generates required rotational speed and/or position values and/or inserts situation-related identifiers (also: situation identifiers).

[0048] The situation identifier is advantageously inserted into a telegram 4 to the drive system 2 at a point in time at which a process begins that appears to be of interest for a later measurement evaluation. Since a number of different processes can be of interest, the identifier preferably contains a number by which the different processes are able to be distinguished.

[0049] The points in the execution sequence of a process at which a specific identifier is inserted are decided for example by a programmer of the PLC or by a creator of the parts program of a machine tool.

[0050] What happens in the drive when a specific identifier occurs is defined for example during the commissioning of the drive system 2 or after commissioning from a cloud 9.

[0051] The converter 21 advantageously comprises a closed-loop drive control and also an open-loop control of a situation-related measurement data recording.

[0052] Data communication between the control unit 1 and the drive system 2 is preferably undertaken by the bus 6. Data is transmitted by means of a telegram 4.

[0053] In the figure the telegram 4 comprises two bytes. Other telegram lengths are also conceivable. The telegram 4 comprises at least one instruction, preferably a plurality of instructions, wherein the telegram comprises at least one instruction for recording, wherein a recording of at least one actual value, preferably of a plurality of actual values, and/or of an actual value sequence, preferably of a plurality of actual value sequences, of the drive system is caused by the instruction for recording.

[0054] An actual value is a value at one point in time for example. An actual value can for example also be an averaged value over a short period of time.

[0055] An actual value sequence is advantageously a plurality of values, in particular different values, during a recording duration.

[0056] The instruction for recording is advantageously a control word 5.

[0057] Moreover the telegram 4 advantageously contains an instruction about the behavior of the drive system, for example about the beginning of a defined work cycle.

[0058] The instruction for recording preferably comprises an identifier (ID),

[0059] On occurrence of a specific ID a measurement function belonging to the ID is carried out. The ID determines which actual value (for example current, rotational speed, temperature) will be recorded and also the recording duration and the sampling rate of the recording. For example a selection is made from a list of those actual values to be recorded that are linked to the ID. Recording duration and sampling rate are selected in a similar way.

[0060] The cloud 9 advantageously provides a function for project planning of the situation-related measurement data recording. The cloud 9 further advantageously provides a data memory for storage of the recorded measurement data. Above and beyond this the cloud 9 advantageously provides a function for measurement data evaluation for predictive maintenance.

[0061] The identifier is advantageously assigned the defined sampling rate and/or the defined recording duration, preferably under remote control, in particular by means of cloud computing, during ongoing operation of the drive system. This is indicated by an arrow 7 that points from the cloud 9 to the drive system 2.

[0062] After recording of the actual value a recorded actual value and/or after recording of the actual value sequence a recorded actual value sequence is advantageously stored, in particular by means of cloud computing. This is indicated by an arrow 8 that points from the drive system 2 in the direction of the cloud 9.

[0063] FIG. 2 shows an example of a method sequence.

[0064] In an optional method step S0 a measurement value is defined for the ID. This is advantageously carried out under remote control, in particular by means of cloud computing. Another, for example local, parameterization is also possible, however.

[0065] The measurement value definition is advantageously defined before the telegram is distributed.

[0066] In a method step S1 the telegram is transmitted. The telegram preferably contains a number of instructions. Through the telegram it is advatnageously signaled to the drive system that a specific work cycle is to be started and also that specific measurement values are to be determined.

[0067] In a method step S2 the work cycle begins.

[0068] At the same time or offset in time to S2, in a method step S3 there is the recording of the actual value or of the actual values and/or of the actual value sequence or of the actual value sequences.

[0069] In a method step S4 the values are stored, in particular by means of cloud computing.

[0070] In a method step S5 there is an analysis of the stored values. For example values from different series of measurements are compared, preferably by means of cloud computing, in order to draw conclusions about wear or damage and be able to plan maintenance work.

[0071] Unplanned downtimes of machines, drives and plants can thus be avoided since problems are recognized at an early stage.

[0072] FIG. 3 shows examples of parameters for the identifier ID. Values m to be recorded can be: voltage U (depending on a time t), rotational speed n, current I and torque M. Further values to be recorded can be: position, rotational speed deviation, position deviation, error messages, load, main voltage, DC link circuit voltage, digital inputs, temperatures, for example motor temperature and/or transistor temperature and/or ambient temperature etc.

[0073] The identifier ID advantageously only represents a trigger signal with a code. The measurement signals are assigned in the drive system 2 or from the cloud 9.

[0074] Moreover a recording duration ta and also a sampling rate fa are indicated.

[0075] FIG. 4 shows a change of an ID assignment.

[0076] The defined actual value and/or the defined actual value sequence are advantageously assigned to the identifier ID, preferably under remote control, in particular by means of cloud computing, during ongoing operation of the drive system.

[0077] The defined sampling rate and/or the defined recording duration are advantageously assigned to the identifier ID, preferably under remote control, in particular by means of cloud computing, during ongoing operation of the drive system.

[0078] The figure shows that the values m to be recorded and also the recording duration ta are changed by means of the cloud 9.

[0079] The change can be made by the cloud 9 during ongoing operation.

[0080] The invention is suitable for example for detecting an accuracy of machine tools or a change to the latter.