Automation appliance and method for accelerated processing of selected process data

• US 8,554,978 B2
• Filed: 05/12/2011
• Issued: 10/08/2013
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: WAGO Verwaltungsgesellschaft mbH (WAGO Holding GmbH)
• Original Assignee: WAGO Verwaltungsgesellschaft mbH (WAGO Holding GmbH)
• Inventors: Buesching, Dirk, Kirste, Hans-Herbert, Koopmann, Sebastian, Wetter, Oliver
• Primary Examiner(s): STIGLIC, RYAN M
• Application Number:
  US13/106,235
• Publication Number:
  US 20110283027A1
• Time in Patent Office: 880 Days
• Field of Search: 710/305, 710/315
• US Class Current: 710/315
• CPC Class Codes: G05B 2219/25145 I-O communicates with local bus at one end and with fieldbus at other end
• CPC Class Codes: G06F 13/4054 where the function is bus cycle extension, e.g. to meet the timing requirements of the target bus
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 12/40032 Details regarding a bus interface enhancer
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04L 2012/4026 Bus for use in automation systems

Abstract

An automation appliance (6) having at least one field bus interface (12) for connection to a field bus (2) and transmission of data packets (DP) with process data (PD) via the field bus (2) and having at least one local bus interface (21) for connection to a local bus (7) and transmission of process data (PD) between field devices (9a, 9b, 9c) connected to the local bus (7) and the automation appliance (6), and having means for converting the data packets (DP) coming from the field bus (2) into a data stream (DS) for the local bus (7) and for converting the data stream (DS) sent from the local bus (7) to the automation appliance (6) into data packets (DP) for the field bus (2) is described. The automation appliance (6) has an acceleration unit (10) for selecting process data (PD_S) that are to be converted in accelerated fashion and for separately converting the selected process data (PD_S), which acceleration unit is set up such that the selected process data (PD_S) are output at an earlier time than unselected process data (PD_N) which are transmitted as well in combination with the selected process data (PD_S).

Claims

1. An automation appliance comprising:

at least one field bus interface for connection to a field bus and for transmission of data packets (DP) with process data (PD) via the field bus;

at least one local bus interface for connection to a local bus and for transmission of process data (PD) between field devices connected to the local bus and the automation appliance;

means for converting the data packets (DP) coming from the field bus into a data stream (DS) for the local bus and for converting the data stream (DS) sent from the local bus to the automation appliance into data packets (DP) for the field bus; and

an acceleration unit for selecting the process data (PD) that are to be converted in accelerated fashion and for separately converting the selected process data (PD_S),

wherein the acceleration unit is set up such that the selected process data (PD_S) are output at an earlier time than unselected process data (PD_N) which are transmitted as well as in combination with the selected process data (PD_S),

wherein the acceleration unit is designed to select the process data (PD) as hardware logic with a state recognition unit for recognizing the state of the presence of the selected process data (PD_S) that are to be processed in accelerated fashion from the data packets (DP) or the data stream (DS), and

wherein the automation appliance is set up to process the unselected process data (PD_N) using software with a processor-controlled processing unit, while the selected process data (PD_S) are processed using hardware logic more quickly than the unselected process data (PD_N) which are transmitted as well as in combination with the selected process data (PD_S).

2. The automation appliance according to claim 1, wherein the automation appliance is set up to check correctness of the received data packets (DP) and/or the received data stream (DS) and is set up to output the selected process data (PD_S) only after the correctness has been established.

3. The automation appliance according to claim 1, wherein the automation appliance is set up to select and to output the selected process data (PD_S) in each transmission cycle of the data packets (DP) or the data stream (DS) and is set up to process the unselected process data (PD_N) only in the event of update requests.

4. The automation appliance according to claim 1 further comprising;

a first field bus controller, which has an integrated acceleration unit, is connected in parallel with a second field bus controller without an acceleration unit.

5. The automation appliance according to claim 1 further comprising:

at least one direct interface for connection of the field devices,

wherein the automation appliance is set up to output the selected process data (PD_S) via the at least one direct interface directly to the field devices connected to the at least one direct interface, and/or

wherein the automation application is set up to process signals which are present on the at least one direct interface and to convert the signals into the selected process data (PD_S) for the purpose of accelerated incorporation into the data packets (DP) for the field bus at an earlier time than the unselected process data (PD_N) arriving in the same period via the local bus.

6. A method for the accelerated processing of selected process data (PD_S) from data packets (PD) and/or a data stream (DS) comprising:

observation of the data stream (DS) on a local bus, which an automation appliance coupled to a field bus uses to communicate with at least one input and/or output module for the purpose of connection to at least one field device, or of the data packets (DP) on the field bus;

selection of process data (PD_S) that are to be processed in accelerated fashion from the observed data packets (DP) and/or the observed data stream (DS);

processing of the selected process data (PD_S) separately from unselected process data (PD_N) which have been transmitted in combination with the selected process data (PD_S), and

output of the selected process data (PD_S) at an earlier time than the unselected process data (PD_N) which are transmitted as well as in combination; and

processing the unselected process data (PD_N) using software with a processor-controlled processing unit, while the selected process data (PD_S) are processed using hardware logic more quickly than the unselected process data (PD_N) which are transmitted as well as in combination with the selected process data (PD_S),

wherein the selection of the process data (PD) is designed as hardware logic with a state recognition unit for recognizing the state of the presence of the selected process data (PD_S) that are to be processed in accelerated fashion from the data packets (DP) or the data stream (DS).

7. The method according to claim 6 further comprising:

incorporation of the selected process data (PD_S) into the data packets (DP) for the field bus or the data stream (DS) for the local bus at an earlier time than the unselected process data (PD_N) which are transmitted as well as in combination.

8. The method according to claim 6 further comprising:

checking of correctness of the received data packets (DP) and/or the received data stream (DS); and

incorporation of the selected process data (PD_S) following establishment of the correctness of the associated data packet (DP) or the associated data stream (DS) in which the selected process data (PD_S) were transmitted.

9. The method according to claim 6 further comprising:

processing of the unselected process data (PD_N) only in the event of update requests,

wherein the selection and the output of the selected process data (PD_S) are in each transmission cycle of the data packet (DP) or the data stream (DS).

10. The method according to claim 6 further comprising:

accelerated conversion of signals which are present on at least one direct interface from the at least one field device which is connected directly to the at least one direct interface into the selected process data (PD_S);

incorporation of the selected process data (PD_S) into the data packets (DP) for the field bus at an earlier time than the unselected process data (PD_N) arriving in the same period via the local bus; and

output of selected process data (PD_S) to the at least one direct interface of the automation appliance for the purpose of direct transmission to the at least one field device which can be connected to the at least one direct interface.