JP2010206837A - Method and switching device for controlling device connected in bus network through opened field bus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a method for controlling devices connected in a bus network and having a gateway through an opened field bus so that a user inspects or constructs the system by eliminating expensive wiring and at low operation costs and restart the system when an error is notified. <P>SOLUTION: The method is for controlling devices connected in a bus network. A gateway does not expect bus subscribers in a target structure on the output side, and in order to take charge of at least one bus subscriber and create a new target structure having at least one bus subscriber, a construction mode is started at the gateway. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a method and a switching device for controlling a device connected to a bus network provided with a gateway via an open fieldbus.

  This component relates in particular to data technology networking, the equipment subscriber structure and the electricity supply by the equipment energy. Typical devices are to be understood as industrial switching devices such as relays, devices such as motor starters, power switches and measurement sensors.

  The industrial switching equipment described above and others are switched or monitored in electrical installations, usually centrally, via a control system, for example via a programmable logic controller (SPS). Typically, the switching device is coupled to a control unit (eg, SPS) via a control wiring line. This usually allows the switching device (in this case preferably a relay) to be switched on and off, while at the same time supplying the energy necessary for switching the switching device and for monitoring the signal from the switching device. To the control unit. Examples of signals for monitoring the switching device are here the state of the relay switching position (on / off) or the state of the motor protection switch (on / trigger), in particular in the case of motor starters.

  When configuring an electrical device (eg, in a switching cabinet), the wiring and connection of the electrical switching equipment with the control system is done manually, typically by electrical professionals. This task is often a very time-consuming part of switching cabinet assembly. In addition, this wiring is prone to errors across many similar control lines. This is because, for example, it may be mistaken in the cable channel when laid and connected to the wrong device clip. Furthermore, this control line must be laid on the individual switching device in order to electrically connect the individual switching device thereto.

  In addition to this, additional costs are required in the molding because the cable channel is somewhat shortened for the wiring of the track and must be mounted on a mounting plate. Individual control lines are laid in the mounting plate.

  The intermediate connection of a device between the bus and another component of the system is likewise known from the prior art. In EP 079640A2, for example, it is disclosed to provide an amplification unit that can be connected to a bus for a drive device of an electrical switching device. The electromagnetic or electrical amplification device is connected on the one hand to the supply current connection terminal and on the other hand to the drive connection terminal via an interface circuit having a bus connection part. The interface circuit is configured to be bidirectional or unidirectional. Furthermore, switching means are provided for the setting parameters of the amplification unit and / or switching device for signals to be taken over by the bus and relate to the state of the amplification unit and / or switching device to be transmitted to the bus Switching means are provided for signal detection.

  In connection with coupling to the bus, modules are known from EP 0 633 784 A1. This module is provided with a bus coupling. This bus connection is connected on the one hand to the contact system and on the other hand to the evaluation electronics. Here, the contact system is for electrical and mechanical connection to the bus, and the evaluation electronics program the measurement signal or status information and output a switch-off command. Here, this measurement signal or status information is supplied via a bus. The module can process the measurement signal and configure it itself and output it to the trigger system for the protection switch.

  From DE 10147442 A1 a method and device for monitoring a bus system with at least three subscribers and a control unit are known. Here, one subscriber is configured as an upper subscriber, and starts each data transmission to the bus system. The second subscriber is configured as a member of a lockable vehicle cabin locking system, and the third subscriber is configured outside the closable vehicle cabin. The first subscriber monitors the data transmission as follows. That is, in at least one operating state of the vehicle and / or bus system, the first subscriber takes action at each data transmission to the bus system not initiated by the first subscriber and Monitor to stop. A LIN bus system is used as the bus system.

  DE 10147446 A1 also discloses a method and apparatus for monitoring a bus system with at least two subscribers. At least one of these subscribers is configured as an authoritative subscriber and monitors data transmission to the bus system. Here, a mark is transmitted during each data transmission to the bus system, and this mark is uniquely assigned to the subscriber. If data transmission is initiated by a subscriber different from the one with this authority, execution of the data to be transmitted is blocked. Here again, the LIN bus system is used.

  A communication control device is known from DE 19756918 A1. Here, the master station transmits the stack transmission frame to a number of slave stations, and individual response frames are transmitted from the slave station to the master station.

  DE 68920028T2 discloses a method and apparatus for multiple access with periodic reservations in a communication system. Here, access to a transmission medium in a communication network having a bidirectional bus structure is performed in a folding or dual bus structure and in a number of stations connected between the buses. The network includes two bidirectional, opposite direction transmission buses and multiple stations. Each of these stations is connected to two buses. In addition, a head position is provided, which forms time slits on the bus at regular intervals. Here, each station requests access to the slit.

  DE 3424866A1 also discloses a method and device for transmitting data. Here, the data is transmitted in the bus system in digital form in a time multiplex. The bus system consists of a central control unit, a plurality of equivalent subscriber stations located under this control unit, and a data line connecting at least one of all subscribers.

European Patent Application Publication No. 07964040A2 European Patent Application No. 0673784A1 German Patent Application Publication No. 10147442A1 German Patent Application Publication No. 10147446A1 German Patent Application Publication No. 197569918A1 German Patent Application Publication No. 68920028T2 German Patent Application Publication No. 3424866A1

  An object of the present invention is to simplify a method and a switching device for controlling a device having a gateway connected to a bus network via an open field bus as follows. In other words, the costly wiring is omitted, and the system can be simplified so that the user can inspect and construct the system at a small operation cost and can be restarted at the time of error notification.

  In the case of the method described in the superordinate concept of claim 1, this problem is solved by the following. That is, the gateway assumes at least one bus subscriber without erwarteting the bus subscriber in the egress-target-structure, and at least one bus subscriber and a new target structure. It is solved by starting the build mode at the gateway to form. In the case of the switching device described in the superordinate concept of claim 5, the above-mentioned problem is solved by the following. That is, the switching device has at least one control input side for interrogation of the preceding switching device and / or gateway (20) as a bus subscriber, and the control output side as a subsequent subscriber as another subscriber. Is solved by having for selection of switching equipment. Developments of the invention are described in the dependent claims.

Three typical hardware components of the illustrated system Flow chart showing system test and takeover of new target structure of equipment connected to application bus Block diagram of application system Block diagram of application system Bus subscriber structure Bus subscriber structure Bus subscriber structure System consisting of gateway, bus subscriber and power module

  The present invention therefore relates to a system. This system has an actuator as a bus subscriber, preferably an industrial switching device (eg a power switch or a motor protection switch-relay-combination), an application bus system, here preferably a LIN bus system. And is networked in terms of data technology and has the purpose of controlling and monitoring these industrial switching devices connected. The system has at least one gateway. This gateway is connected between the open fieldbus and the actuator. A single pluggable connection line connects individual bus subscribers or actuators to each other and to the gateway. Here it is used for the transmission of data, ie control data and / or status data, and for supplying energy to the bus subscriber and possibly to other components of the system. Advantageously, the gateway is arranged between the open fieldbus and the connection line and has a connection device for connection to the fieldbus, distribution voltage and connection line. A number of functions are performed by the gateway. These functions are described in further detail below.

  A particular advantage of the system and method of the present invention is that the control wiring to the industrial switching equipment is replaced by a pluggable and easily attachable line connection system. The costly and error-prone control wiring installation is eliminated, and the use of cable channels or the installation of channels required for track laying is omitted.

  Such wiring relates to the control line, here advantageously the relay, the line for switching on and off of the relay and the status line, here for example the switching position of the relay or the state of the motor protection switch (on, trigger Is provided for the status line for status inquiry.

  Of course, as an actuator or bus subscriber, it is possible to connect complex equipment that can exchange a lot of information and data. Such devices are, for example, industrial switching devices such as power switches, electrical motor protection relays or frequency converters.

  A system for controlling devices connected to a bus network via a gateway via a field bus having the gateway has the following features individually or in combination with each other. In particular, a bus controller is provided here for monitoring the gateway. The gateway itself advantageously has at least one interface to the open fieldbus and at least one interface to the application bus for controlling and querying at least one actuator or bus subscriber present on the application bus; A data output for communication with at least one bus subscriber. It has proved advantageous for the gateway to have at least one storage unit. This is to protect the writable bus structure by the bus controller so that it remains and to protect the structure where the application bus exists.

  Furthermore, the gateway has at least one first supply jack for supplying a main supply voltage and at least one second supply jack for supplying an auxiliary voltage connectable to or connected to the bus subscriber. It has proven to be advantageous. In addition to this, the gateway is connectable or connected to at least one control line for the response of the first bus subscriber.

  The gateway has at least one status display for displaying bus subscriber operating status and bus communication and / or at least one display for at least one bus subscriber to display its operating status It has proved advantageous to have a part. This always allows visual control of the normal operation of the system.

  Furthermore, the gateway preferably has at least one operating member for initiating the bus construction of the bus subscriber connected via the application bus. In such a construction, i.e. in the construction mode, it is checked by the gateway via the application bus how many bus subscribers are connected to the application bus. Here, the bus subscriber is advantageously given a serial number. Here, each bus subscriber can store its own identification number and / or the gateway can store the identification number in a manner that can be guaranteed even if the voltage goes to zero (nullspannungssicher). As a result, data loss does not occur after a new switch-on even when the switch is off. The operation is therefore continued without further equipment after switching on. Advantageously, after detection of all bus subscribers, such a structure can be stored or stored in the gateway (20) as a target structure, and control data and / or status data can be stored in the gateway. Can be exchanged between or between them and the bus subscriber.

  With respect to at least one bus subscriber or actuator, they have at least one control input for interrogation of a preceding bus subscriber and / or gateway, and the control input is a subsequent bus It has proved advantageous to have for subscriber selection. Furthermore, it has at least one control unit and programming unit for the realization of bus communication and actuator application functions.

  For current supply or energy supply, at least one bus subscriber has a device for connection to the distribution voltage. In addition, the bus subscriber preferably advantageously transfers at least one device for the data stream and / or auxiliary voltage supply (Durchschleifen) to the subsequent bus subscriber or actuator and / or the transfer of the auxiliary voltage to the actuator application. Have for.

  Advantageously, the at least one bus subscriber has at least one device for performing the actuator operation and / or at least one device for notifying the actuator operation and / or the actuator position on the application bus; As a result, communication between the actuator position and the actuator operation can be performed via the application bus.

  The at least one bus subscriber further advantageously has at least one device for writing an identification number by the gateway. Further, the number connected to the application bus can be inspected. Here, the bus subscribers are preferably numbered sequentially. Each bus subscriber stores a special identification number so that it is guaranteed even if the voltage goes to zero. That is, the unique number is supplied again when the switch is turned on after the switch is turned off, and is not lost by switching. The gateway advantageously also stores all identification numbers in such a way that they are guaranteed even when the voltage goes to zero.

  The application bus may be a LIN bus. Thereby, performance of control data and / or status data and application bus structure can or can be deployed via a protocol. This consists in particular of a LIN data frame having a data length of 1 to 8 bytes. In principle, other structures with different data lengths are possible, for example.

  Possible application bus structures are writable in the gateway. Furthermore, the written application bus structure can be overwritten by the bus controller.

  With respect to bus subscribers or actuators, the invention starts with at least one actuator being an electrical switching device. The actuator here is in particular a combination of a motor protection switch and a relay.

  A plug-in module is preferably provided. This plug-in module has, on the one hand, actuator properties, on the other hand it has at least one mechanical display for indicating the actuator position and / or at least one display itself. Have for the operating situation. Thereby, the actuator position is displayed by the plug-in module. This plug-in module is added on the actuator, in particular on the switching device. Instead of changing the equipment of the switching device, it is sufficient to provide a plug-in module on the switching device which also has a corresponding plug connection for connecting the connection lines.

  Furthermore, the plug-in module has at least one digital input for the connection of a potential switching contact. In the case of a combination of a motor protection switch and a relay, this is suitable, for example, for an auxiliary switch for querying the motor protection switching position.

  The plug-in module preferably has at least one current circuit interruption for the actuator. Such a current circuit interrupting unit is used, for example, to electrically reduce conversion start (Wendestarters).

  If the plug-in module is arranged on the combination of the motor protection switch and the relay, the plug-in module advantageously switches the auxiliary voltage with a relay coil. The above-mentioned further features of such a plug-in module are equally advantageously obtained with such a motor protection switch and relay combination.

  This system is further configured as follows. That is, the power module is configured to be connected in series with the bus subscriber or between the bus subscribers. This power module supplies the data stream to the next bus subscriber and / or is not supplied with an auxiliary voltage. The intermediate connection of the power modules interrupts the “linear” energy supply from the bus subscriber to the bus subscriber. However, data connection and main voltage supply are performed between a subscriber located in front of the power module and a subscriber located behind the power module. A new supply to subsequent bus subscribers is realized by means of the intermediately connected power modules. Therefore, an external voltage source is preferably provided. This supplies an auxiliary voltage to the power module. The auxiliary voltage is transmitted to the next following subscriber. Furthermore, the power module preferably has at least one display for indicating the presence of an external auxiliary voltage. This makes it possible to control the application of the auxiliary voltage to the power module and thus to at least one subsequent subscriber.

  Advantageously, at least one bus subscriber or actuator has a mechanical display for indicating the actuator position. Therefore, this can be read without any problem and without current.

  At least one sensor is placed in series with the bus subscriber to detect the physical quantity.

  In particular, in an industrial switching circuit having a gateway via an open fieldbus according to the invention, the method for controlling a device connected to a bus network is preferably after the operating member has been operated. The build mode begins.

  In order to describe the present invention in more detail, the present invention will be described in more detail with reference to the drawings in the following examples.

  In the drawing, an example of a combination of motor protection switch and relay shows the presented system and the method for networking it technically. However, the components of the present invention are not limited to this combination of motor protection switch and relay, also referred to as a motor starter, by this exemplary display.

  1A shows the gateway 20, FIG. 1C shows the bus subscriber in the form of a plug-in module 40 on the motor protection switch and relay combination, and FIG. The power module 50 shown is shown as a typical hardware component of an exemplary system.

  The gateway 20 has an interface to a host control system, for example, the open fieldbus 2 (see FIG. 3A). This is, for example, Profibus DP, device net or CANopen. As a result, the gateway is connected to the upper fieldbus system in terms of data technology. Similarly, the gateway 20 connects the bus subscribers N1 to Nn installed as industrial switching equipment via the flat band 8 connected to the network on the application bus 10 shown in FIG. 3A. Control. The gateway 20 has a first supply device 24 for providing a voltage supply 14 to its electronics and bus subscriber electronics, and a second supply device 25 to supply the bus subscriber. For voltage 16 connection. The latter is an auxiliary voltage for bus subscriber actuator operation. Here, for example, voltage supply or current supply is performed by a combination of a motor protection switch and a relay. The gateway 20 has at least one light emitting diode 28. This is used to indicate the status of the operating status of the gateway and bus communication. The gateway 20 further has a construction key 27. This is used for the start of automatic bus construction by the bus subscriber; in addition there is at least one storage unit in the gateway 20. This is used for residual protection of the bus structure.

In the case of a combination of a motor protection switch and a relay, the plug-in module 40 shown in FIG. 1C is used. This is also shown as SM. This is or is adapted to the relay mechanically and electrically. The plug-in module 40 has two pin contacts 49. These are used for electrical connection with the relay coil. This plug-in module carries control wiring. Through this, the relay coil is electrically driven and controlled, and the relay switching position is inquired electrically. Furthermore, if this is present, as long as it is present, it is still possible to interrogate electrically floating contacts. In addition to the electrical function, the plug-in module 40 is provided with a switching position display unit 46. This indicates the switching position mechanically so that it is visible to the operator. The plug-in module 40 further has the following characteristics:
• Connect auxiliary voltage 16 (see FIGS. 3A and 3B) to the relay coil • Have mechanical switching position display 46 to indicate actuator position • Display 48 for own operating status Has a digital input 44 for connection of the floating switching contacts. Has a current circuit interrupt 45 for the actuator.

  Such a current circuit interruption unit 45 is used, for example, for electrical reduction of the conversion starter.

  The application bus 10 is operated via the above-described multi-line (here, six-line) flat band 8 (see FIGS. 3A and 3B). The track 8 starts from the gateway 20 and is inserted or guided from the bus subscriber to the bus subscriber via the connection plug. In each bus subscriber Nx, two plug-in jacks 41 and 42 are configured in the plug-in module 40, and the flat band 8 is plugged on the bus input side and the bus output side. Due to the linear arrangement of the subscribers, the last bus subscriber Nn does not have an inserted flat band 8 as a connection line on the output side; the output side of the last subscriber (plug-in jack) It remains “empty”.

  Each bus subscriber has a status indicator 28, 48, 58, which advantageously displays the status of the device visually as an LED. The insertion module 40 and the power module 50 of each bus subscriber Nx have two-pole terminals 44, 45, 54 and 55. Here, floating contacts are connected. This is for example for an auxiliary switch that inquires about the position of the motor protection switch.

  In FIG. 5 another individual unit of the system is shown. Here, for example, a first bus subscriber N1 configured as a combination of a motor protection switch and a relay shows three lines L1, L2, L3 of a power supply network connection terminal and a load M. In addition, a motor protection switch is shown in the upper half of the bus subscribers shown as N1, N2, N3-Nn, and in the lower half, the plug-in module 40 plugged on the relay has its own. Shown with plug-in jacks 41, 42 and a mechanical indicator 48 for the contact position of the relay. The display of FIG. 5 should be understood as an application bus 10 having n subscribers. Here, as an option, the power module 50 shown in FIG. 5 can be inserted. A detailed description of the power module 50 will be given below.

  FIG. 2A shows a flowchart for displaying a system test, and FIG. 2B shows a flowchart for carrying a new target structure. The flowcharts in the above figures mesh with each other.

  In the first step in FIG. 2A, this requires that the voltage be switched on at the gateway. In the next step, the gateway checks whether the subscriber reaches the bus. If “yes” is answered to this inquiry, it is subsequently inquired whether this subscriber is expected at the gateway. If the query is also answered with “Yes”, the subscriber is built by the gateway in a further step. The gateway then selects the next subscriber through the established subscriber. The gateway then checks again whether the subscriber reaches the bus and the query loop is thereby terminated. If these queries are answered “no” at the start or at this point, further questions are asked whether the subscriber is expected by the gateway. If this question is answered “No”, there is a state that there is no bus subscriber, and this is set as the target structure. That is, it is confirmed that the gateway bus structure is correct and the system is ready for operation. This is because such a target structure is the same as the actual structure. This state is therefore indicated by a new LED ("Status LED switch on").

  If the question whether the subscriber is expected by the gateway is answered yes if the subscriber does not reach the bus, or if the subscriber is expected by the gateway If it is confirmed that the bus is reachable and the answer is no, a structure error exists. That is, the gateway and bus are not ready for operation. This is because the target structure is not equal to the actual structure. Accordingly, such a state is similarly displayed by the display LED (“state LED switch on”). The query whether the subscriber reaches the bus and whether this is expected by the gateway continues as a loop until all the bus subscribers expected by the gateway and written in the structure are detected.

  This results in two possibilities: the real structure is the same as the target structure, and the real structure is not the same as the target structure. In the first case, the system is ready for operation, and the status is indicated by a status LED 28 '' that emits statically. In a situation where the actual structure and the target structure are not the same, the status LED 28 ′ blinks, whereby the operator operates the construction key 27. By operating the construction key 27, the existing structure is taken over as the target structure, and the system moves to the final inspection (FIG. 2B).

  Here, each individual subscriber is queried by the gateway and possibly existing parameters are protected in the gateway. Furthermore, it is checked whether the maximum allowable number of subscribers on the application bus has been exceeded. If so, the gateway goes back to the error state again. This is because the target structure does not match the actual structure. Otherwise, subscriber data is read and protected in the gateway. The gateway selects the next subscriber via the reached subscriber and checks whether they are reachable. When all subscribers are detected, the gateway and subscribers transition to a normal operating state. Here, control data or status data is exchanged between the gateway and the subscriber. This structure remains stored in the gateway as a new target structure.

  3A and 3B show block circuit diagrams of the bus control unit. 3A shows the gateway and the first bus subscriber N1, and FIG. 3B shows the power module 50 and the second bus subscriber N2 inserted between the second and third bus subscribers N2, N3. ing. On the supply side, the input side for the open fieldbus 2 (plug connection or plug jack 23) and voltage supply (main voltage 14 to U1, GND, auxiliary voltage 16 to U2) are shown. Yes. U1 shows the voltage supply 14 for the electronics in the gateway and bus subscribers, and U2 shows the auxiliary voltage 16 for the subscriber application. The output side of the gateway (plug-in jack 22) is connected to the 6-wire flat band 8.

  Optionally, power modules (PM) 50 are intermediately connected at arbitrary locations in a linear row of bus subscribers (FIG. 3B). This is also shown schematically again in FIG. The intermediate connection of the power modules interrupts the “linear” energy supply from the bus subscriber to the bus subscriber. The data connection and the main voltage 14 are connected between the bus subscribers N1, N2, N3 located in front of the power module and the bus subscriber Nn located behind the power module.

  With the power module PM50 connected in the bus line connection, a new supply is realized for the bus subscribers (group G) continuing in the bus train. For this purpose, the power module is connected to the voltage supply unit 16 ′, for example, with an alternating current of 24 volts. In FIG. 3B, the voltage supply 16 'is shown coming from below (relative to the drawing plane) and shown in FIG. 5 coming from above (relative to the drawing plane). This voltage supply is, for example, a protective supply for a group of bus subscribers, which should function as its own emergency stop group. The power module has screw terminals or plug jacks 54, 55 for the energy supply 16 '. Otherwise, the power module, like other bus subscribers, has two plug-in jacks 51, 52, where one input side and one output side are connected. For plug-in systems. Similarly, a status display unit 58 is provided in the power module. This is in particular for visual display via LEDs. The LED indicates whether a supply voltage 16 'is applied to the group G of bus subscribers following the power module.

  With this introduced system, it is no longer possible to perform conventional control wiring for networked industrial switching equipment. Especially in the case of motor protection switch combinations, the networking takes place with a single pluggable connection line. On the one hand, the connection line 8 transmits control data or status data, and on the other hand transmits the necessary energy to the switching device. Furthermore, it is possible to form a group of bus subscribers by using the power module described above. This allows special energy supply and energy monitoring for such groups. This group configuration is used, for example, to configure a specific segment or a specific circuit. Here, the switching devices constitute a special emergency stop group. Here it monitors whether it is connected or disconnected. As mentioned above, the power module can be optionally integrated.

  The function and operation of the system will be described with reference to FIGS. In the drawing, bright circles with reference numbers 28 '' and 48 '' represent light emitting LEDs, and black circles without another reference number represent non-light emitting LEDs 28 and 48; Fig. 4 represents a flashing LED with a circle of radiation with reference numbers 28 'and 48'.

  For connection to the open fieldbus 2 system, the gateway 20 is the central member. From the gateway, the bus subscribers N1 to Nx are energized, controlled, monitored and the control data and status data of all connected bus subscribers are transmitted to the upper fieldbus 2. This is first connected to a voltage supply 14 for its own electronic circuit, and secondly connected to a voltage supply 16 for feeding the bus subscriber. With this configuration of voltage supply, the auxiliary voltage 16 to the bus subscriber (for example the voltage to the relay coil) is switched off independently of the bus function (for example an emergency stop system).

  A bus subscriber, for example a combination of a motor protection switch with a plug-in module and a relay, is connected in sequence via a plug-in connection system for the 6-wire flat band 8 provided here. When the main voltage 14 is switched on for the first time in the constructed system, the gateway 20 checks the bus subscribers N1-Nx connected to the application system as already described with respect to FIGS. 2A and 2B. In the state on the output side, an arrangement without a bus subscriber is set as the target structure. This is updated as described above after bundling individual bus subscribers.

  In FIG. 4A, n bus subscribers are wired in the output target structure, ie without bus subscribers. Here, the gateway 20 first does not expect a subscriber based on this target structure. Thus, because of this structural error, the gateway transitions to an error state, which is visually indicated by the gateway 20 with a blinking LED 28 '(upper right corner of the gateway 20 shown in FIG. 4A). The control LED at the first bus subscriber N1 connected directly to the gateway via the connecting line 8 flashes in the same way (LED 48 '). Because this is not expected by the gateway. All other states or control LEDs 48 of the other bus subscribers N2 to Nx are not illuminated, i.e. switched off.

  In FIG. 4B, the construction key 27 is pressed to bear the connected bus subscriber as the target structure at the gateway 20. Here, it is inspected how many bus subscribers (N1 to Nx) are connected to the application bus 10 in order by the gateway via the application bus 10. Here, the bus subscribers are numbered sequentially. Each individual bus subscriber stores this unique identification number so that it can be guaranteed even if the voltage goes to zero. That is, this unique identification number can be used again when a new switch is turned on after the switch is turned off and is not lost by the switch off. Similarly in the gateway, all identification numbers are stored so that they are guaranteed even when the voltage goes to zero. After this process, all connected bus subscribers are established. The LED 28 "at the gateway and the LED 48" at the bus subscriber are all statically switched on and emit light.

  FIG. 4B corresponds to the state where the system is switched off electrically with respect to the main voltage 14 in front of the gateway and is switched on again. After this switch-on, the gateway in turn checks all connected bus subscribers and compares it with the target structure stored internally. In the above situation, the target structure is the same as the connected subscriber structure (actual structure) has not changed. This keeps the system ready for operation.

  Individual bus subscribers are now driven and monitored via the upper open fieldbus 2 bus controller. If the structure of the connected device changes due to, for example, expansion or removal of the device, this is identified by the gateway and displayed by the status LED 28 based on the deviation between the target structure and the actual structure.

  FIG. 4C shows an example with an existing structure of the gateway 20 and bus subscribers N1 to Nn ready for operation after construction. If one or more bus subscribers (Nin) are added to this structure, after switching on, the following diagram results: The gateway status LED 28 flashes. This is because the conventional target structure (n bus subscribers) is different from the actual structure (n + 1 bus subscribers). In addition, the LED 48 'of the first added bus subscriber Nin (which may be a plurality of inserted bus subscribers) also flashes. Because this or these are not expected by the gateway. The user can therefore very easily identify where the deviation of the actual structure exists based on the blinking LEDs. By simply pressing the construction key 27, the new construction is automatically taken over by the gateway. After the automatic bus construction has elapsed, for n + x bus subscribers, the same situation as shown in FIG. 4B will occur for n bus subscribers.

  FIG. 5 illustrates the use of at least one power module 50 to form a group G of bus subscribers. The power module decouples the plug-in module above the bus subscriber, here the motor protection switch and relay (Motorschutzschalter-Schuetz-Kombination), from the auxiliary voltage 16 for the subscriber application. Thus, a new supply of the auxiliary voltage 16 'is performed for the latter. The application bus 10 is loop-connected in the power module 1: 1 with respect to the bus subscriber electronics with respect to the data technology and main voltage supply 14. When the auxiliary voltage 16 'supplied to the power module is switched off, the bus subscriber, for example a relay, is in a floating state behind the power module. However, the bus subscriber's electronics will continue to be powered, so that the current actuator status, for example the contact status of the motor starter, can be transmitted to the gateway.

  The use of a power module works advantageously by: In other words, it works advantageously by forming an independent group of combinations of motor protection switches and relays. This is for example an emergency stop switching circuit, which is switched off separately. The power module is used at any point in the connection plug-in system. It is also possible to construct a plurality of power modules in a connection plug-in system. Thus, a plurality of independent bus subscriber groups are formed.

  The above-described features of the system and its components may be provided individually or in combination with each other. In addition to the embodiments described above, many other embodiments are possible. Here, only one connection line is provided in the system for the connection of bus subscribers and gateways and for the transmission of control data and / or status data and energy.

  2 open fieldbus, 8 connection line (for example, 6-wire flat band line), 10 application bus (LIN bus), N1 to Nn-x bus subscribers (actuator, motor starter, power switch), 14 'main voltage (24V DC) 16, 16' auxiliary voltage (24V DC), 20 gateway, 22 gateway plug jack, 23 plug jack for open fieldbus, 24 main voltage supply (screw) Terminal), 25 Auxiliary voltage supply (screw terminal), 27 Construction key, 28 Status LED, 40 SM plug-in module, 41, 42 Plug-in jack for plug-in connection to the flat band, 44, 45 Voltage supply Plug-in jack, 46 mechanical display, 48 control LE , 49 Plug-in pin for placement on the relay in the motor starter, 50 PM power module, 51, 52 Plug-in jack for plug-in connection on the flat band, 54, 55 Plug-in for voltage supply Jack, 58 Control LED, L1, L2, L3 Power supply network connection terminal for bus subscriber (actuator), M Load at distribution voltage (motor)

Claims (7)

A method for controlling a device connected to a bus network having a gateway in a switching circuit by a system via an open field bus,
The gateway is not expecting bus subscribers (N1-Nx) in the output target structure and is responsible for at least one bus subscriber (N1-Nx) and at least one bus subscriber (N1-Nx) Initiate build mode at the gateway to create a new target structure with
A method for controlling a device connected to a bus network. In the construction mode, the number of bus subscribers (N1 to Nx) connected to the application bus (10) is checked by the gateway via the application bus (10).
2. The method according to claim 1, wherein the bus subscribers (N1-Nx) are numbered serially.   Each bus subscriber (N1-Nx) stores its own unique identification number and / or the gateway (20) stores the identification number so that it is guaranteed even when the voltage goes to zero, The method of claim 2.   After detecting all the bus subscribers (N1 to Nx), the structure is stored or stored as a target structure in the gateway (20), and control data and / or status data is stored in the gateway (20 And the bus subscribers (N1-Nx) are exchangeable or exchanged. Switching equipment driven by the system,
The switching device has at least one control input for interrogating a preceding switching device and / or gateway (20) as a bus subscriber and a control output as a successor as another bus subscriber. Have to select the switching equipment to be,
Switching equipment characterized by that.   6. A switching device according to claim 5, wherein the switching device comprises at least one control unit and a programming unit for realizing the functions of bus communication and switching device applications.   7. Switching device according to claim 5 or 6, wherein the switching device comprises at least one device for writing an identification number by the gateway (20).

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