DE10358231A1 - Device for connecting field appliances via bus system to supervisory control system e.g. for supervisory control system, has field bus connection module with bus circuit for connection to supervisory system - Google Patents

Abstract

A device with at least one first connection module for connecting at least one field device (1) via a first field bus (9) to a supervisory system for data transmission between the first field connection module and the supervisory system. At least one first field connection module (2) has a first bus connection (S) for connecting to the supervisory system (10) via the first field bus (9) and at least one first field connection module (2) has a second bus connection (M) for connecting to a second bus (5).

Description

The The invention relates to a device for connecting input units and / or output units and / or input / output units and / or sensors and / or actuators - below also as field devices designated - over one Bus system to a parent System, for example, to a parent Leit / control system.

A transmission of field device signals over one Bus, which with a parent Leit / control system is connected, is realized via bus interfaces, which are arranged in a rock bus connector.

In the DE 199 25 547 A1 is a Leit / control system with a central computer, a bus and a plurality of input units and / or output units and / or input / output units and / or sensors and / or actuators - hereinafter called field devices - described, the field devices via "intelligent" Fieldbus connectors are connected to the bus of the control / control system. The fieldbus connectors are each connected via first plug devices to the associated field devices. Each fieldbus connector has a second connector and a connection cable. The connection cable of the field device engages on the plug at its end in a second plug-in device of another field device. A field device accesses another plug-in device of a bus coupling, whereby the connection to the bus and the central computer of the bus is established. For each fieldbus plug, the connection contacts of its second plug-in device are internally connected to the corresponding lines of the connection cable, so that the continuous connection of the field devices with the bus and the central computer is ensured.

For a transition (Gateway) and data exchange between different bus systems are in each fieldbus connector, the internal connection contacts for the connection between the different buses through a complex wiring effort executed.

There for the Connection of the field devices to a high-quality or high-performance bus, such as the high-speed ETHERNET or PROFIBUS, each field device has its own fieldbus connector In particular, the implementation of fieldbus applications is used then expensive, if the functionality of the connected field device is not necessarily a direct connection to the efficient bus requires, for example, a data exchange with the device the parent Control system is not required.

Of the Invention is accordingly the task is based, a device of the type mentioned ge with comparatively little effort to specify what the fieldbus applications cost-effective be designed.

These The object is achieved by a Device of the type mentioned above with the specified in claim 1 Characteristics solved. Advantageous embodiments and improvements of the device according to the invention are in further claims and stated in the description.

The invention develops in the DE 199 25 547 A1 described fieldbus plug to the effect that the field bus connector for data transmission between a parent system and a plurality of field devices, a first bus connection for connection to a higher-level system via a first field bus, which is designed in particular as a more powerful high-speed bus, and a second Busan circuit for Connection to a second bus, which is usually a slow field bus has.

Of the Fieldbus connector, also referred to below as fieldbus connection module, the transition from the powerful one Bus realized to the slow bus is by means of a plug-in device with a first field device connected. Other field devices are about the second bus over each of the field devices assigned further fieldbus plug connectable, these cost-effective simply constructed plug without high-quality bus connection for the transition to a powerful one High-speed bus running are.

In advantageously takes over the fieldbus connector communicates the field devices with the higher-level control system by means of the first field bus connection designed as a slave interface, as well as the communication of the connected to the second bus Field devices over the in the field bus connection module integrated as a master interface running second bus interface, wherein the master and slave interfaces for data exchange the field devices over the Bus realized by means of special software and / or hardware modules are. A usual additional wiring for the transition between the various field buses is thus eliminated.

As an advantageous development of the device according to the invention is in the field bus connection module, a unit for preprocessing the signals of the field connected to the second field bus devices for the higher-level control / control system. The preprocessing function, also referred to as PLC functionality, is carried out by means of a microcomputer located in the unit, as in a PLC. Programs are stored in the microcomputer for this purpose, which programs are preferably loaded via the bus interfaces or the plug-in device of the field connection module.

The Invention allows Advantageously, a reduction in equipment costs, as the fieldbus connector with the integrated bus interfaces for the master and slave functions only for the connection to the parent Leit / control system is used.

All other field devices are about the second bus over each of the field devices Assigned simple fieldbus plug without integrated high quality Bus connections for the transition to more powerful High-speed bus connected.

From It is particularly advantageous that a connection of other field devices to the second bus cost-effective by means of simply constructed fieldbus plug without integrated high quality Bus connections for the transition to the more efficient High-speed bus executable and a use of an additional bus interface for data transmission between the field buses is no longer necessary.

By the connection of the field devices over the slow fieldbus and the exchange of data from the field devices over the Slave interface in the fieldbus connector according to the invention, which the connection over the more powerful High-speed bus to the control and / or control system causes are no changes in the structure of the fieldbus system with respect to its wiring required.

Based of the embodiment shown in the following figures to the invention and advantageous embodiments, improvements and further advantages of the invention will be explained and described in more detail.

It demonstrate:

1 An embodiment of the device according to the invention for connecting a plurality of field devices to a parent Leit / control system, and

2 a detailed embodiment of the device according to the invention for connecting field devices to the parent Leit / control system.

In the 1 is an embodiment of an apparatus for connecting a plurality of input units and / or output units and / or input / output units and / or sensors and / or actuators 1 . 1.1 . 1.2 ... 1.n - also referred to below as field devices - to a higher-level system 10 , in particular a PLC or a process control system (PLS), shown via a bus system, wherein the field devices 1 . 1.1 . 1.2 ... 1.n via field connection modules 2 . 2.1 . 2.2 ... 2.n with the higher-level system 10 are connected.

For data exchange of the field devices 1 . 1.1 . 1.2 ... 1.n with the parent system 10 is at least a first field connection module 2 provided, which via a first Busanschaltung S and a first bus 9 , for example of type ETHERNET or PROFIBUS, with the higher-level system 10 , and via a second bus interface M with a second bus 5 , for example of the type Foundation Fieldbus H1 or RS 485, communicates.

The connection between the first field connection module 2 and the first bus 9 is in a known manner via a bus coupling 8th and one at the bus interface 8th located plug 7 realized, thereby connecting to the bus 9 and the parent system 10 of the bus is made.

The first fieldbus connection module 2 is via a plug-in device 3 with a first field device 1 connected. To the second bus 5 are other field devices 1.1 . 1.2 ... 1.n via further the respective further field devices 1.1 . 1.2 ... 1.n associated plug-in devices 3 and the respective other field devices 1.1 . 1.2 ... 1.n associated further fieldbus connection modules 2.1 . 1.2 ... 2.n connected.

Each field connection module 2 . 2.1 . 2.2 ... 2.n is with a second plug-in device 4 for connection to the second bus 5 Mistake.

Every field device 1 . 1.1 . 1.2 ... 1.n is at his device interface 31 which exemplifies in 2 is shown with the associated field connection module or fieldbus connector 2 . 2.1 . 2.2 ... 2.n via its device interface 30 connected.

In the bus interfaces M, S of the first fieldbus connector 2 Each software and / or hardware modules are integrated, which in the first fieldbus plug 2 located first bus interface S as a slave interface for the parent powerful bus 9 and the second bus interface M as a master interface for the simple or slow fieldbus 5 is realized. The transition, also called gateway function, between the slow second bus 5 and the more powerful first bus 9 is thus through the two in the first fieldbus connector 2 integrated bus interfaces M, S realized.

In the 2 is a detailed embodiment of the device according to the invention with the first field connection module 2 for connecting the field devices 1 . 1.1 . 1.2 ... 1.n to the higher-level management / tax system 10 demonstrated.

These are in the first fieldbus connector 2 the slave interface S for connection to the process control system or the PLC 10 over the more efficient first bus 9 , the master interface for connection to the slow fieldbus 5 and the device interface 30 for connection to the device interface 31 of the first field device 1 over the plug-in device 3 integrated.

In addition to the gateway function for data exchange between the two buses 5 . 9 is the first fieldbus connector 2 in its function to the extent that one unit 20 is provided, which preprocessing of the signals to the second fieldbus 5 connected field devices 1 . 1 . 1.2 ... 1.n for the process control system or the PLC 10 performs.

The pre-processing of the signals to the second fieldbus 5 connected field devices 1 . 1.1 . 1.2 ... 1.n for the higher-level management / tax system 10 done by means of one in the unit 20 located microcomputer. Programs are stored in the microcomputer for this purpose, which are preferably via the bus interfaces M, S or the plug-in device 3 of the first field connection module 2 during the production of the first fieldbus connector 2 or during commissioning in the microcomputer 20 be installed.

Claims (11)

Device with at least one first field connection module ( 2 ) for connecting at least one field device ( 1 ) via a first fieldbus ( 9 ) to a higher-level system ( 10 ) for data transmission between the at least one first field connection module ( 2 ) and the higher-level system ( 10 ), characterized in that - the at least one first field connection module ( 2 ) a first bus interface (S) for connection to the higher-level system ( 10 ) over the first fieldbus ( 9 ) and - the at least one first field connection module ( 2 ) a second bus interface (M) for connection to a second bus ( 5 ) having. Apparatus according to claim 1, characterized in that the at least one first field bus connection module ( 2 ) by means of a plug-in device ( 3 ) with a first field device ( 1 ) connected is. Apparatus according to claim 1 or 2, characterized in that further field devices ( 1.1 . 1.2 ... 1.n ) with a corresponding further fieldbus connection module ( 2.1 . 2.2 ... 2.n ) to the second bus ( 5 ) are connectable. Device according to one of the preceding claims, characterized in that the field devices ( 1 ) 1.1 . 1.2 ... 1.n ) Input units and / or output units and / or input / output units and / or sensors and / or actuators. Device according to one of the preceding claims, characterized characterized in that the first bus interface (S) by means of software and / or hardware modules is designed as a slave interface. Device according to one of the preceding claims, characterized characterized in that the second bus interface (M) by means of software and / or hardware modules is designed as a master interface. Device according to one of the preceding claims, characterized in that in the first field bus connection module ( 2 ) one unity ( 20 ) is provided, which preprocessing of the signals to the second field bus ( 5 ) connected field devices ( 1 ) 1.1 . 1.2 ... 1.n ) for the higher-level system ( 10 ) causes. Device according to one of the preceding claims, characterized in that the unit ( 20 ) is designed as a microcomputer with integrated software. Device according to one of the preceding claims, characterized in that the software via the bus interfaces (M, S) or the plug-in device ( 3 ) of the first field connection module ( 2 ) in the unit ( 20 ) is installable. Device according to one of the preceding claims, characterized in that the first bus ( 9 ) is designed as a high-speed bus. Device according to one of the preceding claims, characterized in that the second bus ( 5 ) is executed as a slow fieldbus.