Method for operating a communication network, communication network and subscriber for a communication network

A communication network comprising a plurality of subscribers,

• wherein data are exchanged in the communication network between the subscribers in the form of telegrams,
• wherein the telegrams comprise a plurality of data sections,
• wherein the subscribers are configured to interpret an end portion of the telegrams as a check value for checking an absence of errors of preceding data sections of the telegrams,
• wherein the subscribers are configured to process the telegrams in pass-through, so that the telegrams are received by the subscribers and are forwarded to a respective next subscriber while being received,
• wherein the subscribers are configured to perform sending a telegram to a next subscriber with a characterizing data section of the telegram at its end, if an error of the telegram is detected when receiving the telegram, so that the telegram sent to the next subscriber comprises an end portion representing an invalid check value,
• wherein the characterizing data section is part of the end portion of the telegram, and
• wherein by the characterizing data section the telegram is characterized for the next subscriber such that the telegram is not considered as an initial error but as a subsequent error.

A subscriber for a communication network,

• wherein data are exchanged in the communication network in the form of telegrams,
• wherein the telegrams comprise a plurality of data sections,
• wherein the subscriber is configured to interpret an end portion of the telegrams as a check value for checking an absence of errors of preceding data sections of the telegrams,
• wherein the subscriber is configured to process the telegrams in pass-through, so that the telegrams are received by the subscriber and are forwarded to a next subscriber while being received,
• wherein the subscriber is configured to perform sending a telegram to a next subscriber with a characterizing data section of the telegram at its end, if an error of the telegram is detected when receiving the telegram, so that the telegram sent to the next subscriber comprises an end portion representing an invalid check value,
• wherein the characterizing data section is part of the end portion of the telegram, and
• wherein by the characterizing data section the telegram is characterized for the next subscriber such that the telegram is not considered as an initial error but as a subsequent error.