METHOD FOR OPERATING A PAPERMAKING MACHINE, DRIVE SYSTEM AND PAPERMAKING MACHINE

Abstract

For operating a drive system or a papermaking machine, motion parameters such as a rotary speed of a motor are determined. From at least one of the motion parameters, a performance value or Key Performance Index is calculated in a motion controller and/or in a non-local computing unit. The performance value is derived from changes in the motion parameters or control parameters over time and displayed to operating personnel on a display. The performance value represents a control performance indicating a control speed responsive to a set motion parameter and thus an operating state of the papermaking machine.

Claims

1.-14. (canceled)

15. A method for operating a papermaking machine which comprises a motion controller and a plurality of drives providing motion parameters for the motion controller, the method comprising: controlling with at least one controller of the motion controller at least one motion parameter, and determining with the motion controller, on the basis of the motion parameters and/or controller parameters, based on changes over time of the motion parameters and/or the controller parameters, at least one performance value representing a control performance indicating a control speed responsive to a set motion parameter, wherein each controller parameter is a manipulated variable of the at least one controller of the motion controller and the at least one performance value indicates an operating state of the papermaking machine.

16. The method of claim 15, wherein the drives further comprise detectors providing the motion parameters for the motion controller.

17. The method of claim 15, wherein the at least one performance value is determined from motion parameters derived from two motion controllers, with each of the two motion controllers being assigned to a different unit of the papermaking machine.

18. The method of claim 17, wherein the two motion controllers are assigned to different papermaking machines and wherein data are transferred between the two motion controllers via a technical data link.

19. The method of claim 18, wherein the technical data link comprises a Cloud.

20. The method of claim 15, wherein different operating states of the respective papermaking machine have different performance values associate therewith.

21. The method of claim 15, wherein the at least one performance value is displayed in form of a spider diagram, a traffic-light representation or a trend.

22. The method of claim 15, wherein the at least one performance value Is displayed as a function of time.

23. The method of claim 15, wherein the at least one performance values is a productivity of the papermaking machine, a functional stability (runability), a fault occurrence (e.g. web breaks per hour), or a controller functionality.

24. The method of claim 15, wherein the at least one performance value is determined from a plurality of motion parameters and/or controller parameters in a non-local computing unit.

25. The method of claim 24, wherein the non-local computing unit resides in a Cloud.

26. A drive system, comprising: a plurality of drives and detectors providing motion parameters, a motion controller comprising at least one controller controlling at least one motion parameter and determining a performance value from the at least one motion parameter, wherein the performance value results from changes over time of the at least one motion parameter and indicates a control speed responsive to a set motion parameter, and a display displaying the performance value.

27. The drive system of claim 26, further comprising a bus system connecting plural motion controllers and providing the motion parameters to a respective motion controller.

28. The drive system of claim 27, wherein the bus system comprises a Field-Bus.

29. The drive system of claim 26, wherein the drive system is connected via a technical data connection to a further drive system.

30. The drive system of claim 26, wherein the drive system is connected to a further drive system via a Cloud.

31. The drive system of claim 26, wherein the display is a mobile display.

32. A papermaking machine, comprising a drive system, said driving system comprising a plurality of drives and detectors providing motion parameters, a motion controller comprising at least one controller controlling at least one motion parameter and determining a performance value from the at least one motion parameter, wherein the performance value results from changes over time of the at least one motion parameter and indicates a control speed responsive to a set motion parameter, and a display displaying the performance value.

Description

[0084] The invention will now be described and explained in greater detail making reference to the drawings. The exemplary embodiments shown are herein not to be regarded as a restriction of the invention. Individual feature of the embodiments described can be combined to form new embodiments. In the drawings:

[0085] FIG. 1 shows a papermaking machine with a drive system,

[0086] FIG. 2 shows two motion controllers with drive systems,

[0087] FIG. 3 shows two motion controllers, and

[0088] FIG. 4 shows a method for providing performance values.

[0089] FIG. 1 shows a papermaking machine 1 with a drive system. The drive system comprises a plurality of motors 3. The motors serve, for example, for driving a continuous flow of material, in particular a paper web.

[0090] Each motor 3 is connected by means of a frequency converter 5 to a motion controller 7 and/or a programmable logic controller (PLC) or a CPU, in particular a SIMATIC control device, optionally with a corresponding additional module. Preferably, a motion controller 7 comprises a programmable logic control system SPS or a CPU. The motion controller 7 receives the specifications regarding the motion parameters (rotary speed, torque, . . . ), for example from a higher-order control system, represented in this case by a computing unit 11. The connection of the higher-order computing unit 11, which can also be configured as a central server or as a Cloud 13a, takes place by means of a technical data connection 13.

[0091] The motion parameters BP of the individual motors 3 are usually coupled. The coupling of the motion parameters BP preferably takes place in the motion controller 7 and/or with the aid of the frequency converter 5.

[0092] A motion parameter BP can be a location, a web speed, a rotary speed or a torque of a drive. A motion parameter BP can also be further variables such as the temperature, a flow speed of a process medium, a web tension and/or a loading parameter.

[0093] A motion parameter BP can furthermore also be a setting of a control loop, for example, a proportional component of a PI or a PID controller.

[0094] Furthermore the motion controller 7 has at least one controller. The controller provides the controller parameter RP. The controller serves for controlling the at least one motion parameter BP.

[0095] FIG. 2 shows two motion controllers 7 with drives. Each drive comprises a frequency converter 5 and a motor 3. The drives are each connected via a bus system 9 to the motion controller 7. For example, the bus system is configured as an industrial network connection, e.g. a PROFIBUS, an EtherCAT or another Ethernet connection.

[0096] The respective motion controllers are connected to one another via a technical data connection 13, for example a higher-order network. The technical data connection 13 can also be configured via an Intranet or the Internet.

[0097] Each motion controller 7 serves to record motion parameters BP which are provided by the drive components. Each motion controller serves to calculate performance values KPI (Key Performance indices).

[0098] The performance values KPI can be displayed on a display 15. The operator of the papermaking machine (not shown) can thus draw conclusions from the performance values KPI regarding the operating state of the drive system or of the papermaking machine. A mobile display device 15a, such as a tablet computer or a mobile telephone (smartphone) is also suitable as the display 15.

[0099] Performance values KPI can be controller settings, deviations of (rotary) speeds from a pre-set rotary speed, a temperature, for example, of a component, in particular the respective motor 3.

[0100] The display of the performance values KPI serves for the rapid recognition of the operating state of the drives and/or of the papermaking machine.

[0101] An exchange of the performance values KPI serves, in particular, for comparing operating states of different regions of a papermaking machine or for the comparison of papermaking machines between one another.

[0102] FIG. 3 shows two motion controllers 7 which are connected by means of a technical data connection 7 configured as a Cloud 13a. The Cloud 13a is configured as a decentralized computing unit and as a decentralized store for the calculation of performance values KPI and for storing motion parameters BP.

[0103] The motion parameters BP are provided similarly to FIG. 3 by a plurality of drives. Each drive comprises a frequency converter 5 and a motor 3. In addition, with the aid of the bus system 9, further detectors 17 or sensors can determine motion parameters BP or other parameters and provide them to the respective motion controller 7. Detectors 17 can also be assigned to a converter 5 or a motor 3.

[0104] FIG. 4 shows a method for providing performance values KPI. The calculation of the performance values KPI takes place with the aid of the motion parameters BP provided by the drives and/or by detectors 17.

[0105] By way of example, motion parameters BP and/or controller parameters RP are provided with a time stamp t1, . . . , t4. By means of the time stamp t1, . . . , t4, the motion parameters BP are representable as a function of time.

[0106] By means of the motion parameters BP and/or the controller parameters RP, the performance values KPI are also displayable as a function of time. By means of the display of the performance values KPI as a function of time, changes in the operational flow of the machine can be generated in a clear manner.

[0107] The technical data connection 13 between the motion controllers 7 makes clear that performance values of different drives, in particular, drives of different regions of papermaking machines and even of different papermaking machines can also be compared with one another.

[0108] In summary, the invention relates to a method and a device for operating a papermaking machine 1 and to a papermaking machine 1. For this purpose, a plurality of motors 3 is connected to a motion controller 7. The motors 3, the (frequency) converters 5 and/or the detectors 17 provide motion parameters BP for the motion controller 7. From the motion parameters BP, performance values KPI are calculated, wherein the performance values indicate the operating state of the papermaking machine 1. By means of the display of the performance values KPI on a display 15, in particular on a mobile device 15a with a display 15, a user can advantageously discern the operating state of the papermaking machine. Furthermore, by means of a connection of a plurality of motion controllers 7 via a technical data connection 13, a comparison of different regions of papermaking machines 1, in particular of a plurality of papermaking machines can take place. With the invention disclosed herein, it is possible to react rapidly to negative deviations during the operation of a papermaking machine 1.