Drive system and method for controlling a drive system

Abstract

Drive system (100) comprising at least one first drive zone (A) having electric drive motors (110) and at least one second drive zone (B) having electric drive motors (110), wherein the drive motors (110) of the first (A) and second (B) drive zone can be supplied with electrical energy by means of a series power supply line from a supply unit (120) via at least one drive motor (110) of the first drive zone (A) to at least one drive motor (110) of the second drive zone (B), wherein the drive system (100) further comprises a control line which is at least partially arranged as a hybrid cable (160) on the power supply line, wherein the control line is further configured to output a control signal (140a, 140b, 141a, 141b) to the drive motors (110) of the first (A) and second (B) drive zone,such that the drive motors (110) of the first drive zone (A) are stopped and at the same time the drive motors (110) of the second drive zone (B) continue to operate, characterized in that a plug (400) is used to connect the drive motors (110) of the second drive zone (B) to the drive motors (110) of the first drive zone (A), in which the power supply line between the at least one drive motor (110) of the first drive zone (A) and the at least one drive motor (110) of the second drive zone (B) is bridged, wherein the control line between the drive motors (110) of the first (A) and second (B) drive zone is interrupted.

Description

[0001] The present invention relates to a drive system and to a method for controlling a drive system according to the main claims.

[0002] In existing drive systems, when using multiple drive motors, numerous individual cables must be run to supply these motors with electrical power and control signals in order to control each one with sufficient precision. Alternatively, a group of drive motors can be combined into a drive group or drive zone, but each of these drive zones must be supplied with electrical power and / or control signals from a higher-level control module or power supply unit. This results in increased wiring complexity in conventional drive systems, leading not only to high manufacturing costs but also to a high susceptibility to interference due to the large number of cables within the drive system or control cabinet.

[0003] The prior art documents DE 296 20 124 U1, DE 10 2004 023 314 A1, DE 196 32 609 A1 and DE 10 2009 031 466 A1 are known.

[0004] Fig.Figure 1 shows a block diagram of such a conventional drive system, in which a plurality of drive motors 110 are provided, which are, however, divided into three zones A, B, and C. The drive motors 110 of each individual zone A, B, or C are supplied with electrical energy by a power supply unit 120 (which acts as a feed-in or regenerative power supply unit or is designed as a converter) via a DC link 130, whereby individual control signals 140 are also transmitted from this power supply unit 120 to the drive motors 110 of the first zone A via a control unit 150. In the second zone B, a second control unit 151 is provided, which is coupled to the DC link 130 and via which further control signals 141 are transmitted to the drive motors 110 of the second zone B for the control of these drive motors.In the third zone C, a third control unit 152 is provided, which is coupled to the intermediate circuit 130 and through which third control signals 142 are routed to control the drive motors 110 of the third zone C. The drive motors 110 of each zone are supplied with energy and the corresponding control signals in series by the respective assigned control unit 150, 151, or 152 via a hybrid cable 160. Consequently, each string in each of the zones requires its own control unit 150, 151, or 152, to which the associated hybrid cable 160 is connected. The control units 150, 151, and 152 are interconnected via intermediate circuit and 24-volt lines, as shown in the diagram. Fig. As can be seen from Figure 1, this line configuration for controlling drive motors 110 in different zones unfortunately leads to an increased effort for the line routing.

[0005] The object of the present invention is to create an improved drive system and an improved method for controlling a drive system.

[0006] This task is solved by a drive system and a method for controlling a drive system according to the independent claims.

[0007] This description presents a drive system comprising at least a first drive zone with electric drive motors and at least a second drive zone with electric drive motors, wherein the drive motors of the first and second drive zones can be supplied with electrical energy via a series power supply line from a supply unit through at least one drive motor of the first drive zone to at least one drive motor of the second drive zone, wherein the drive system further comprises a control line which is at least partially arranged in the power supply line to form a hybrid cable, wherein the control line is further configured to output a control signal to the drive motors of the first and second drive zones, such that the drive motors of the first drive zone are stopped and at the same time the drive motors of the second drive zone continue to operate.

[0008] Furthermore, the present description introduces a method for controlling a drive system, such as the one mentioned above, wherein the method comprises the following step: - Outputting a control signal to the drive motors of the first and second drive zones, so that the drive motors of the first drive zone are stopped and at the same time the drive motors of the second drive zone continue to operate.

[0009] It is also advantageous to have a computer program product with program code that can be stored on a machine-readable medium such as semiconductor memory, hard disk memory or optical memory and is used to carry out or control the steps of the method according to one of the embodiments described above when the program is executed on a computer or device.

[0010] The approach presented here is based on the understanding that connecting the power supply lines in series to supply the various drive motors of different drive zones significantly reduces the wiring effort for the drive system. Energy is routed from the power supply unit through at least one drive motor in the first drive zone to at least one drive motor in the second drive zone, thus avoiding the need for a separate power supply line from the power supply unit to the drive motor(s) of the second drive zone. This also reduces manufacturing costs for the drive system and minimizes the system's susceptibility to failure due to a large number of lines housed within the drive system's control cabinet.

[0011] Advantageously, a connector can be used to connect the drive motors of the second drive zone to the drive motors of the first drive zone, whereby the power supply line between the at least one drive motor of the first drive zone and the at least one drive motor of the second drive zone is bridged, while the control line between the drive motors of the first and second drive zones is interrupted. Such an embodiment of the present invention offers the advantage that the use of the special connector provides a very simple way to couple an (additional) control line into a hybrid cable, thus reducing the effort required for wiring the individual drive motors of the drive system.

[0012] Furthermore, it is advantageous if the connector has a separate contact for coupling an external signal line as a control line for the drive motors of the second drive zone. Such an embodiment of the present invention offers the advantage of very simple assembly of the external signal line as a control line for the drive motors of the drive zone, thereby again forming a hybrid cable at the connector's output by integrating a control line that specifically carries signals for controlling the drive motors of the second drive zone. The control line, which contains control signals for controlling the drive motors of the first drive zone, can terminate blindly in a further contact of the connector, whereby a power supply line nevertheless enters the connector at this further contact and exits the connector again via the separate contact.

[0013] To enable particularly good flexibility in terms of control during emergency situations where individual components or drive motors of the drive system need to be stopped, the drive system can furthermore include an emergency stop zone. This zone comprises at least one drive motor from the first drive zone and at least one drive motor from the second drive zone. The drive motors in the emergency stop zone can be stopped by an emergency stop control signal that differs from the standard control signal. Defining such an emergency stop zone thus allows individual drive motors from the first and second drive zones to be stopped, creating an auxiliary zone within the drive system that extends across at least one zone boundary.

[0014] The advantages of the approach disclosed in the preceding description become particularly apparent when drive motors are to be operated in more than two drive zones.In particular, in this case a third drive zone can be provided in the drive system, which has electric drive motors, wherein the drive motors of the first, second and third drive zone can be supplied with electrical energy by means of a series power supply line from a supply unit via at least one drive motor of the first drive zone to at least one drive motor of the second drive zone via at least one drive motor of the third drive zone, wherein the control line is further configured to output a control signal to the drive motors of the first, second and third drive zone, so that the drive motors of the first drive zone and / or second drive zone are stopped and at the same time the drive motors of the third drive zone continue to be operated.Such an embodiment of the present invention offers the advantage that, by connecting the drive motors in series in the wiring of at least the drive zones, a further reduction in wiring effort can be achieved, for example in a control cabinet of the drive system.

[0015] To ensure a particularly rapid restart of the drive motors in a drive zone that were previously stopped, an electrical voltage can remain applied to the emergency-stopped drive motors. This means that, for example, only the drive motors directly at the drive motor itself are switched off, and not an entire branch or sub-branch of the power supply line. In particular, the power supply line can be designed to maintain an electrical voltage at the stopped drive motors of the first and / or second drive zone.

[0016] The invention is explained in more detail below with reference to the accompanying drawings. These show: Fig. 1. A block diagram of a drive system according to the state of the art; and Fig.2 a block diagram of a drive system according to an embodiment of the invention; Fig. 3 a block diagram of a transition between two drive zones; Fig. 4 a perspective view of a plug as it can be used according to an embodiment of the present invention; Fig. 5 a circuit diagram of signal lines between an external security device and a control unit; Fig. 6. Another circuit diagram of signal lines between an external security device and a control unit; and Fig. 7 a flowchart of an embodiment of the present invention as a method.

[0017] Identical or similar elements in the following figures may be identified by identical or similar reference numerals. Furthermore, the figures of the drawings, their description, and the claims contain numerous features in combination. It is clear to a person skilled in the art that these features can also be considered individually or combined into further combinations not explicitly described here.

[0018] Fig. Figure 2 shows a block diagram of a drive system according to an embodiment of the invention. The diagram in the Fig. 2. Block diagram shown from the block diagram Fig.1, where the series connection of the power supply line from the supply unit 120 via the control unit 150 to the drive motors 110 of the first (drive) zone A, the second zone B, and the third zone C can now be seen. Dynamic 24V signals are transmitted from the control unit 150 or the supply unit 120 as control signals 140, for example, to a door switch. This is to trigger an STO signal 140a to stop the drive motors 110 of the first (drive or safety) zone A when the door is opened, for example, by a technician who wants to change a tool on a machine connected to a drive motor in zone A. It is also conceivable that an emergency stop signal 140b is issued by a switch for a drive motor 110 of zone A to initiate an emergency stop in the event of an accident in the machine driven by a drive motor 110 from zone A. Signals 140, i.e.Signals 140a and / or 140b are then transmitted via a control line to the drive motors 110 of zone A. This control line can be configured as a hybrid cable together with the power supply line 160 to reduce cabling effort by using a single cable.

[0019] In Zone B, dynamically energized 24V signals can also be used in an analogous manner to generate an STO signal 141a and / or an emergency stop signal 141b. These signals 141 can be fed into the hybrid cable 160, which also carries the electrical power from the supply unit 120, at a zone starter in Zone B, i.e., a first drive motor 110 of Zone B, which is arranged in series after the last drive motor 110 of Zone A. A more detailed description of the coupling of the control signals 141 for Zone B is given below.

[0020] In Zone C, dynamically energized 24V signals can also be used in an analogous manner to generate an STO signal 142a and / or an emergency stop signal 142b. These signals 142 can be fed into the hybrid cable 160 at a zone starter in Zone C, i.e., a first drive motor 110 of Zone C, which is arranged in series after the last drive motor 110 of Zone B. This hybrid cable also carries the electrical power from the supply unit 120. Coupling the control signals 142 for Zone C corresponds to coupling the control signals 141 into the hybrid cable at the zone starter of Zone B, as described above.

[0021] Fig. Figure 3 shows a block diagram of a transition between two drive zones, here drive zone A and drive zone B. The diagram shows the... Fig.Figure 3 shows that the control unit 150 in the hybrid cable 160 has, in addition to the power supply line, a control line for transmitting the control signals for controlling the drive motors 110 of drive zone A. The control signals 140 for (safety) zone A are transmitted, for example, as shown in the illustration. Fig.2. The control unit 150 acts as a zone starter 210 for zone A. The control signal(s) for zone B are fed into the series circuit at a zone starter 210, which is, for example, a drive motor 110 of zone B, via a connector described in more detail below, and introduced into the hybrid cable 160 along with the power supply line. The control line for the drive motors 110 of zone A thus terminates at the zone starter 210 of zone B, whereas the power supply line is also continued from the last (series-connected) zone participant 220 of zone A to the zone starter 210 of zone B in order to implement the series circuit using the hybrid cable 160.

[0022] Fig.Figure 4 shows a perspective view of a connector 400 as it can be used according to an embodiment of the present invention. The connector 400 serves, for example, to ensure the series connection of the hybrid line to the individual drive motors 110 by connecting preceding drive motors in the series connection to subsequent drive motors in the series connection via the hybrid line 160. The connector 400 comprises a first connector contact 410, through which a power supply line and a control line are fed to the connector, and a second connector contact 420, through which the power supply line can be routed from the connector 400. Furthermore, the connector has a separate connector contact 430, through which control signals from another zone can be fed into the outgoing hybrid line.This means that the connector 400 is internally wired such that the control line supplied via the first contact 410 is not routed further within the connector (i.e., it is a blank end), and the control line exiting at the second contact is supplied with the signals via the separate contact 430. For example, control communication signals for controlling additional drive motors can be routed from connector 400 via fourth contacts 440.

[0023] In addition to the above, it should be noted that the approach presented here arose during the preliminary considerations for a new project, exploring innovative ideas and opportunities for product improvement. Specifically, for linearly arranged (modular) machines, the aim is to enable cleaning and setup work in individual segments of a drive system or machine without affecting the other segments. Furthermore, a reduction in wiring effort should be achieved. A problem identified in the prior art is the need to create multiple wiring strands. This leads to increased wiring complexity and greater susceptibility to malfunctions due to the additional lines within the machine or system.To solve the problems of the prior art, the present approach proposes that arbitrary groups (zones) can be formed from multiple participants on a single cable run without significant effort. These zones can be equipped with safety technology (SI technology; SI = safety) or without (SI technology). Simultaneously, so-called E-Stop zones (EZ = emergency stop zones) can be established. These can operate independently of the SI zones. An E-Stop signal is transmitted via the hybrid cable in parallel with the safety technology signals. A particular advantage of this approach is the ability to flexibly form zones within a single cable run, allowing for the simultaneous creation of both safety and non-safety zones. This results in reduced wiring effort, while simultaneously enabling the transmission of an E-Stop signal via the hybrid cable in parallel with the safety signals.

[0024] The use of a hybrid cable is therefore particularly advantageous; that is, a cable that incorporates both a power supply line for transmitting energy to operate multiple drive motors in different zones and the transmission of control signals for switching on or activating individual drive motors or entire groups of drive motors. The hybrid cable from the servo motor with integrated drive electronics (inverter) transmits, among other things, the safety signals to the device or the drive motor via connector 400, specifically via contact 420. Whether these signals are used subsequently depends on the configuration of the safety connector contact 430 of the respective servo motor (zone participant or zone starter).From the safety connector 400, the (control) signals go to the internal safety processing (which is, for example, located in or on the connector 400) and are passed on to the following servo motor via the plug contact 420 and the hybrid cable.

[0025] To ensure the specific advantages of the approach described here, a zone definition is implemented, which is very easy for a customer of the drive system to configure. This zone definition serves to divide the individual drive motors on a single string (i.e., on a hybrid cable) into different zones. Whether a new zone is started upon STO / SBC (STO = Safe Torque Off according to EN60204-1 = safe torque release of a drive system, SBC = Safe Brake Control according to EN60204-1 = safe control of a holding brake of a drive system) or whether the servo motor belongs to the previous zone via the hybrid cable is determined by the pin assignment of safety connector pin 430. Two variants can be coded via pin 430 of connector 400. 1. The axis (i.e., the motor) receives an identical selection signal as the previous axis (zone participant). 2. A new safety zone is formed using the axis (safety zone starter), with the axis passing the new selection signals (i.e., the control signals) to the following servo motors.

[0026] Zone participant 220 refers to a drive motor that uses the safety signals 140 from the preceding servo motor or drive motor.

[0027] A drive motor or control unit 150, designated as a zone starter 210, marks the beginning of a new safety zone. The necessary safety signals (control signals) should be supplied via connector 430. There are two options for this supply: passive connection using the internal dynamic pulses in conjunction with external safety contacts and an external 24V power supply, or active connection via a SI PLC.

[0028] Additionally, it should be possible to transmit an E-Stop signal (i.e., an emergency stop signal) via the hybrid cable. The E-Stop signal in the hybrid cable is ideally amplified at each servo motor terminal (read into and output by an FPGA). If a new safety zone is detected in the servo motor variant with safety technology, and an I / O (X37 / X38) (connections for additional peripheral devices (digital inputs and outputs) directly on the servo motor) is configured as an E-Stop input at that terminal, this signal is passed on to the subsequent servo motors in the hybrid cable (analogous to safety zone formation). As with the previous KCU (KCU = connection unit with which the hybrid cable can be connected to drive components in the control cabinet), the E-Stop signal can also be inserted into the servo motor chain via a potential-free 24V contact.The connection unit also includes connections for power supply voltage, control supply voltage, FKM (FKM = control communication link between the controller, drive controller and other (bus-compatible) peripherals; here Ethernet variants), and other control lines (module bus, E-Stop, safety control signals). The potential reference of the E-Stop signal in the hybrid cable can, for example, be GND42. (Potential isolation then takes place, for example, in the KCU box). At the start of a new safety zone, a new E-Stop zone can be initiated via a local EA.

[0029] The safety signals are essentially adopted according to the certified safety concept of a well-known series of drive motors. The key difference to the approach presented here lies in the creation of safety zones via wiring through the hybrid cable of the drive system, which is described below.

[0030] A servo motor can be equipped with the STO (L3) safety technology (i.e., the servo motor has an STO function). Simultaneously, a single cable (or hybrid cable) can be divided into multiple safety zones. Each KSM02 (i.e., a servo motor with a Multi-Ethernet FKM & L3 option) can be individually configured as a zone starter (ZB, 210) or zone participant (ZT=220) via the 400 safety connector. For each zone participant, the safety signals from the preceding drive are used. For a zone starter, the safety signals are fed in via the 400 safety connector. In practice, this allows the drive motors of Zone A and / or Zone B to operate while the drive motors of Zone C (and / or, for example, another Zone X not shown in the figures) remain stationary.

[0031] This allows for independent maintenance, cleaning, or tool changes, for example, without having to shut down the entire system (i.e., all drive motors). When the safety system is activated (i.e., the drive motors of individual zones are stopped), the DC link and the control voltage at the drive controller (power section at the motor) remain permanently energized. This enables a faster restart of the axis after the safety system is deactivated (i.e., the drive motors of individual zones are restarted).

[0032] Direct continuation of processing without performing initialization steps (e.g., referencing the drive, synchronizing drives) is also possible. Without this type of safety technology, the workpiece that was processed before the safety activation might have become unusable. This is achieved by preventing the drive from needing to be restarted (i.e., rebooted) and by not re-activating the power (i.e., performing a soft start). This ensures that the predefined parameters and programming are not lost. Independent of the safety zones mentioned above, so-called E-Stop zones (EZ) can be configured. The control signals for the drive motors from the safety zones (priority / master) take precedence over the control signals for the drive motors from the E-Stop zones.

[0033] The main advantage of the approach presented here is that, in linearly arranged (modular) machines, cleaning and setup work should be possible on individual segments of the machine without affecting the other segments.

[0034] The approach presented here is characterized by the fact that zone formation is implemented via a single hybrid cable, which simultaneously serves as the control and power supply for the drive (motor). This means that only the first zone participant (zone starter) needs to be supplied with the safety and electric stop selection signals for zone formation. The transmission of the relevant signals to the other zone participants is carried out via the hybrid cable, thus reducing wiring effort.

[0035] Within a safety zone, zone participants that do not have a safety-related function can also be operated. However, the safety wiring is routed through these (zone) participants. Parallel to the safety signals, an E-Stop signal is carried via the hybrid cable (which is important for the safety function SS1) (SS1 = Safe Stop and Safe Drive Interlock (Stop category 1 of EN 60204-1) = safe stopping of a drive system (emergency stop)). This E-Stop signal can be used to regularly stop the drive before locking the final stage via (STO), (independent of the control communication link). This E-Stop signal can define the same zones as the safety technology. However, the E-Stop zones can also be configured independently of the safety zones.

[0036] A safety zone consists of one zone starter and several or no zone starters. A maximum of 25 drives are permitted in a safety zone. A different wiring configuration of the safety connector 430 determines whether it is a zone starter or a zone participant. The table below shows the pin assignment of the connector 400. The safety connector 430 contains the following safety-related signals: Ext_SI_Ch1_In: Selection signal from channel 1 forwarded from the previous drive Ext_SI_Ch2_In Selection signal from channel 2 forwarded from the previous drive Ext_0V_In GND reference of the selection signals from the previous drive Ext_Dyn_Ch1 Dynamic signal channel 1 (generated by this drive) Ext_Dyn_Ch2 Dynamic signal channel 2 (generated by this drive) Ext_24V 24V for generating the dynamic signals Ext_0V 0V for generating the dynamic signals Ext_SI_Ch1 Selection input channel 1 for the respective drive (is simultaneously forwarded to the next drive) Ext_SI_Ch2 Selection input channel 2 for the respective drive (is simultaneously forwarded to the next drive)

[0037] In addition, this plug connector 430 contains three other signals, which are independent of the safety technology.

[0038] In a zone starter, the safety signals for the respective zone are integrated into the drive train. These safety signals can be generated by a passive safety unit or by an active safety unit. Fig.Figure 5 shows a circuit diagram of signal lines between an external safety device and a control unit. Two dynamic signals, 510 and 520, connect a drive motor 110 to an external safety switching device 530. Two control signal lines, 540 and 550, are also shown, connecting the drive motor 110 to the external safety switching device 530. With a passive safety unit 530, the dynamic signals Ext_Dyn_Ch1 and Ext_Dyn_Ch2 are required from the drive. For this, an external power supply must be connected to Ext_24V and Ext_0V to generate the dynamic signals 510 and 520. These dynamic signals 510 and 520 are fed back to the drive 110 via the passive safety unit 530 through the selection inputs Ext_SI_Ch1 and Ext_SI_Ch2. If the passive unit 530 does not detect a dial tone, signals 510 and 520 are simply passed through.If a selection is made, both channels are pulled to LOW, thus the drive 110 recognizes a selection of the safety technology.

[0039] With an active safety unit, the dynamic signals are not required. This unit generates the necessary dynamic signals itself. Fig. 6 shows a Fig. 5. Similar circuit diagram of signal lines between an external security device and a control unit, where now the dynamic lines 510 and 520 are from Fig. 5 have been omitted.

[0040] For a zone participant, the safety signals from the preceding drive are used. For this purpose, the signals Ext_SI_Ch1_In are bridged with Ext_SI_Ch1, Ext_SI_Ch2_In with Ext_SI_Ch2, and Ext_0V_In with Ext_0V. Thus, the signals from the preceding drive are evaluated at the dial-in inputs and simultaneously passed on to the next drive.

[0041] Fig.Figure 7 shows a flowchart of an embodiment of the present invention as a method for controlling a drive system as described above. The method comprises a step of outputting 710 at least one control signal to the drive motors of the first and second drive zones, such that the drive motors of the first drive zone are stopped and at the same time the drive motors of the second drive zone continue to operate.

[0042] The examples shown are only chosen as examples and can be combined with each other. Reference symbol list 100 drive system 110 drive motors 120 supply units 130 Intermediate circle 140a, b Control signals 141a, b Control signals 142a, b Control signals 150 control unit 151 Control unit 152 Control unit 160 hybrid cables, power supply lines 210 Zone Beginners 220 zone participants 400 plugs 410 supply plug contact 420 outgoing plug contact 430 separate plug contact 510, 520 Dynamization signals 530 external safety switching device 540, 550 dialing signals for security technology 700 methods for taxation 710th step of spending

Claims

[1] Drive system (100) comprising at least one first drive zone (A) comprising electric drive motors (110) and at least one second drive zone (B) comprising electric drive motors (110), wherein the drive motors (110) of the first (A) and second (B) drive zone can be supplied with electrical energy by means of a series power supply line from a supply unit (120) via at least one drive motor (110) of the first drive zone (A) to at least one drive motor (110) of the second drive zone (B), wherein the drive system (100) further comprises a control line which is at least partially arranged as a hybrid cable (160) on the power supply line, wherein the control line is further configured to output a control signal (140a, 140b, 141a, 141b) to the drive motors (110) of the first (A) and second (B) drive zone,so that the drive motors (110) of the first drive zone (A) are stopped and at the same time the drive motors (110) of the second drive zone (B) continue to operate, characterized by , that a plug (400) is used to connect the drive motors (110) of the second drive zone (B) with the drive motors (110) of the first drive zone (A), in which the power supply line between the at least one drive motor (110) of the first drive zone (A) and the at least one drive motor (110) of the second drive zone (B) is bridged, wherein the control line between the drive motors (110) of the first (A) and second (B) drive zone is interrupted. [2] Drive system (100) according to claim 1, characterized by , that the plug (400) has a separate plug contact (430) for coupling an external signal line as a control line for the drive motors (110) of the second drive zone (B). [3] Drive system (100) according to any one of the preceding claims, characterized by , that this further comprises an emergency stop zone which has at least one drive motor (110) of the first drive zone (A) and at least one drive motor (110) of the second drive zone (B), wherein the drive motors (110) of the emergency stop zone can be stopped by means of an emergency stop control signal which differs from the control signal (140a, 140b, 141a, 141b). [4] Drive system (100) according to any one of the preceding claims, characterized by, that a third drive zone (C) is provided in the drive system (100) which has electric drive motors (110), wherein the drive motors (110) of the first (A), second (B) and third (C) drive zone can be supplied with electrical energy by means of a series power supply line from a supply unit (120) via at least one drive motor (110) of the first drive zone (A) to at least one drive motor (110) of the second drive zone (B) via at least one drive motor (110) of the third drive zone (C), wherein the control line is further configured to output a control signal (140a, 140b, 141a, 141b, 142a, 142b) to the drive motors (110) of the first (A), second (B) and third (C) drive zone, so that the drive motors (110) of the first drive zone (A) and / or second drive zone (B) are stopped and at the same time the The drive motors (110) of the third drive zone (C) will continue to be operated. [5] Drive system (100) according to any one of the preceding claims, characterized by , that the power supply line is designed to maintain an electrical voltage on the stopped drive motors (110) of the first (A) and / or second (B) drive zone. [6] Method (700) for controlling a drive system according to one of the preceding claims, wherein the method (700) comprises the following step: - Output (710) of a control signal (140a, 140b, 141a, 141b) to the drive motors (110) of the first (A) and second (B) drive zone, so that the drive motors (110) of the first drive zone (A) are stopped and at the same time the drive motors (110) of the second drive zone (B) continue to be operated. [7] Computer program product with program code for carrying out or controlling the steps of the method (700) according to claim 6, when the program is executed on a device (100).

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