Addressing method and communication system having such an addressing method

Patent metadata

Field	Value
Publication number	US-9130773-B2
Application number	US-201213416681-A
Country	US
Kind code	B2
Filing date	Mar 9, 2012
Priority date	Mar 30, 2010
Publication date	Sep 8, 2015
Grant date	Sep 8, 2015

Abstract

A method retrieves subscriber identifications in a communication network having multiple sub-scribers which are connected to a ring-shaped transmission path. A first telegram is outputted onto the ring-shaped transmission path which comprises a sequence of telegram fields, wherein each subscriber is allocated a telegram field for entering its subscriber identification and each subscriber checks during the passing-through of the first telegram if the subscriber identification field allocated to the subscriber is vacant, and upon detecting a vacant subscriber identification field enters its subscriber identification.

First claim

The invention claimed is:

1. A method for retrieving subscriber identifications in a communication system having multiple subscribers which are connected to a ring-shaped transmission path, the method comprising:
outputting a first telegram onto the ring-shaped transmission path by a control computer, which first telegram comprises a sequence of telegram fields, wherein each subscriber is allocated a telegram field for entering its subscriber identification and each subscriber checks during passing-through of the first telegram if the subscriber identification field allocated to the subscriber is vacant;
upon detecting a vacant subscriber identification field, each subscriber entering that subscriber's subscriber identification; and
outputting a second telegram onto the ring-shaped transmission path by the control computer, which second telegram contains the subscriber identification fields of the first telegram after circulation of the first telegram on the ring-shaped transmission path.

2. The method according to claim 1 , further comprising upon detecting an occupied subscriber identification field in the first telegram, each subscriber entering an error identification into the subscriber identification field allocated to the subscriber of any of the first telegram and the second telegram.

3. The method according to claim 1 , wherein at least one of the subscribers comprises a list of subscriber identifications, and further comprising:
upon detecting an occupied subscriber identification field in the first telegram, each subscriber entering an error identification into the subscriber identification field allocated to the subscriber of the first telegram;
each subscriber checking during passing-through of the second telegram if the subscriber identification field allocated to the subscriber contains that subscriber's subscriber identification, and upon detecting an error, each subscriber entering an error identification into the subscriber identification field allocated to the subscriber of the second telegram; and
outputting a third telegram onto the ring-shaped transmission path, the third telegram containing the telegram fields of the second telegram after circulation on the ring-shaped transmission path, wherein the subscriber comprising a list of subscriber identifications, that subscriber reading in the subscriber identification fields contained in the third telegram during passing-through of the third telegram and comparing the subscriber identification fields with the list of subscriber identifications.

4. The method according to claim 3 , further comprising during the passing-through of the first telegram, each subscriber further checking whether subscriber identification fields arranged before the subscriber identification field allocated to the subscriber respectively contain a subscriber identification and whether subscriber identification fields arranged behind the subscriber identification field allocated to the subscriber are vacant, and upon detecting an error, each subscriber entering an error identification into the subscriber identification field allocated to the subscriber of the first telegram.

5. The method according to claim 1 , wherein at least one of the subscribers comprises a list of subscriber identifications, and further comprising:
upon detecting an occupied subscriber identification field in the first telegram during circulation of the second telegram, each subscriber entering an error identification into the subscriber identification field allocated to the subscriber of the second telegram and checking whether the subscriber identification field allocated to the subscriber contains its subscriber identification;
outputting a third telegram onto the ring-shaped transmission path, which third telegram contains the telegram fields of the second telegram after circulation on the ring-shaped transmission path, each subscriber entering an error identification into the subscriber identification field of the third telegram upon detecting an error in the second telegram during passing-through of the third telegram; and
outputting a fourth telegram onto the ring-shaped transmission path, which fourth telegram contains the telegram fields of the third telegram after circulation on the ring-shaped transmission path, wherein the subscriber comprising a list of subscriber identifications, that subscriber reading in the subscriber identification fields contained in the fourth telegram during passing-through of the fourth telegram and comparing the subscriber identification fields with the list of subscriber identifications.

6. The method according to claim 5 , further comprising:
during the passing-through of the first telegram each subscriber checking whether subscriber identification fields arranged before the subscriber identification field allocated to the subscriber respectively contain a subscriber identification and whether subscriber identification fields arranged behind the subscriber identification field allocated to the subscriber are vacant; and
upon detecting an error in the first telegram, each subscriber entering an error identification into the subscriber identification field allocated to the subscriber of the second telegram.

7. The method according to claim 1 , wherein the subscriber identification comprises a serial identification of the subscriber.

8. The method according to claim 1 , further comprising each subscriber receiving information on that subscriber's position on the ring-shaped transmission path with respect to the further subscribers and the circulating direction of the telegram.

9. The method according to claim 8 , further comprising transmitting the information on the respective position of the subscribers on the ring-shaped transmission path by means of a telegram preceding the first telegram.

10. The method according to claim 8 , further comprising transmitting the information on the respective position of the subscribers on the ring-shaped transmission path with a header section of the first telegram.

11. The method according to claim 1 , wherein the telegrams outputted onto the ring-shaped transmission path each comprise an unambiguous identification.

12. The method according to claim 1 , wherein the telegrams outputted onto the ring-shaped transmission path each comprise a test-value field, wherein during entering the any of the subscriber identification and the error identification the subscribers carry out a calculation of a test value for the telegram and enter it into the test-value field.

13. The method according to claim 1 , wherein at least one subscriber on the ring-shaped transmission path is a setting device and as a subscriber identification enters a setting value into the subscriber identification field allocated to the subscriber of the first telegram.

14. A communication system comprising:
multiple subscribers which are connected to a ring-shaped transmission path; and
a configuration subscriber;
wherein the configuration subscriber is configured to output a first telegram onto the ring-shaped transmission path during the initialization of the communication system, which first telegram comprises a sequence of telegram fields, wherein each subscriber is allocated a telegram field for entering its subscriber identification, wherein each subscriber is configured to check during passing-through of the first telegram whether the subscriber identification field allocated to the subscriber is vacant and to enter that subscriber's subscriber identification upon determining a vacant subscriber identification field; and
wherein the configuration subscriber is further configu

Assignees

• Büttner Holger
• Sachs Jens
• Beckhoff Automation Gmbh

Inventors

• Büttner Holger
• Sachs Jens

Classifications

• H04L29/12254

  Electricity · mapped topic

• H04L29/12264

  Electricity · mapped topic

• H04L61/2038

  Electricity · mapped topic

• H04L12/403

  with centralised control, e.g. polling · CPC title

• H04L61/2046

  Electricity · mapped topic