Bus communication device

摘要

A bus communication device (10) includes a bus line (12), a master computer (11) connected to the bus line (12) and several subscriber units (14) connected to the bus line (12) via at least one coupling arrangement (17). The master computer (11) controls a communication via the bus line (12) using a fixed, prespecified communication protocol. The subscriber units (14) can communicate among each other, and one subscriber unit (14) can communicate with the master computer (11) consistent with the bus protocol. The bus line (11) is configured for supplying the subscriber units (14) and/or at least one coupling arrangement (17) with electrical energy for communication. Each subscriber unit (14) can modulate the subscriber current (IT) consistent with a first modulation (M1), and each subscriber unit (14) and/or each coupling arrangement (17) can modulate the current (IT, IK) consistent with a second modulation (M2).

主权项

1. A bus communication device (10), comprising:
at least one coupling device (17) configured to connect to a bus line (12) and to connect to at least one subscriber unit (14) via a respective branch line (22), wherein the at least one couple device (17) is configured to connect to an energy source (13) connected to the bus line (12) to supply the at least one subscriber unit (14) and/or the at least one coupling device (17) with electrical energy, wherein the at least one coupling device (17) is configured to receive a subscriber current (IT) flowing over the bus line (12) and provide the subscriber current (IT) into the at least one subscriber unit (14), wherein the at least one subscriber unit (14) is configured to perform a first modulation (M1) of the subscriber current (IT) consistent with a prespecified communication protocol, and wherein the at least one coupling device (17) and/or the at least one subscriber unit (14) are configured to perform at least one second modulation (M2) of at least one of a coupling arrangement current (IK) flowing in the coupling device (17) and the subscriber current (IT) for communication, wherein the at least one coupling device (17) and/or the at least one subscriber unit (14) are configured to perform the at least one second modulation (M2) outside of the prespecified communication protocol of the first modulation (M1) and independently of data transmission by the first modulation (M1).