Commander subscriber station for a serial bus system, responder subscriber station for a serial bus system, and method for communication in a serial bus system

A responder subscriber station for a serial bus system, comprising:

• a communication control device configured to control communication between the responder subscriber station and a higher-level commander subscriber station of the bus system and to evaluating at least one signal received from a bus of the bus system using a frame in which a bit time in a first communication phase can differ from a bit time in a second communication phase;
• and
• a status information module configured to detect a change in status information of the responder subscriber station;
• wherein the status information module is configured to indicate, after detecting the change in the status information of the responder subscriber station in a predetermined control bit of a frame to be sent by the responder subscriber station to the commander subscriber station for a first message following the change, that a change in the status of the responder subscriber station has occurred;
• wherein the communication control device is configured, upon request from the commander subscriber station, to send a signal for the first message following the change to the bus to the commander subscriber station;
• wherein the status information module is configured to insert the changed status information into a data field of a frame for a second message following the change to the commander subscriber station;
• and
• wherein the communication control device is configured, upon request from the commander subscriber station, to send a signal for the second message following the change to the bus to the commander subscriber station.

A bus system, comprising:

• a bus;
• and
• at least two subscriber stations which are connected to one another via the bus such that they communicate in series with one another and of which at least one subscriber station is a commander subscriber station and at least one subscriber station is a responder subscriber station,
• wherein the commander subscriber station includes:
• a communication control device configured to control communication between the commander subscriber station and at least one other subscriber station of the bus system and evaluate at least one signal received from a bus of the bus system using a predetermined first frame or a predetermined second frame, wherein the in the predetermined first and second frames, a bit time in a first communication phase can differ from a bit time in a second communication phase, and
• a status information module configured to evaluate the at least one signal received from the bus with respect to a predetermined control bit;
• wherein the communication control device is configured to use the predetermined second frame to request a responder subscriber station subordinate to the commander subscriber station to send at least one first signal according to the predetermined second frame which differs from the predetermined first frame via the bus, and
• wherein the status information module is configured to instruct the communication control device based on the evaluation of the value of the predetermined control bit to use the second predetermined frame to request the responder subscriber station to send at least one second signal according to the second predetermined frame via the bus in order to receive status information from the responder subscriber station;
• wherein the responder subscriber station includes:
• a communication control device configured to control communication between the responder subscriber station and the commander subscriber station of the bus system and to evaluating at least one signal received from a bus of the bus system using a frame in which a bit time in the first communication phase can differ from a bit time in the second communication phase, and
• a status information module configured to detect a change in status information of the responder subscriber station,
• wherein the status information module is configured to indicate, after detecting the change in the status information of the responder subscriber station in a predetermined control bit of a frame to be sent by the responder subscriber station to the commander subscriber station for a first message following the change, that a change in the status of the responder subscriber station has occurred,
• wherein the communication control device is configured, upon request from the commander subscriber station, to send a signal for the first message following the change to the bus to the commander subscriber station,
• wherein the status information module is configured to insert the changed status information into a data field of a frame for a second message following the change to the commander subscriber station, and
• wherein the communication control device is configured, upon request from the commander subscriber station, to send a signal for the second message following the change to the bus to the commander subscriber station;
• wherein each of the at least two subscriber stations also includes a transmitting/receiving device configured to transmit a transmission signal to the bus of the bus system and/or to receive a signal from the bus of the bus system.

A method for communication in a serial bus system, the method comprising:

• providing at least two subscriber stations which are connected to one another via a bus of the bus system such that they communicate in series with one another and of which at least one subscriber station is a commander subscriber station and at least one subscriber station is a responder subscriber station,
• wherein the commander subscriber station includes:
• a communication control device configured to control communication between the commander subscriber station and at least one other subscriber station of the bus system and evaluate at least one signal received from a bus of the bus system using a predetermined first frame or a predetermined second frame, wherein the in the predetermined first and second frames, a bit time in a first communication phase can differ from a bit time in a second communication phase, and
• a status information module configured to evaluate the at least one signal received from the bus with respect to a predetermined control bit;
• wherein the communication control device is configured to use the predetermined second frame to request a responder subscriber station subordinate to the commander subscriber station to send at least one first signal according to the predetermined second frame which differs from the predetermined first frame via the bus, and
• wherein the status information module is configured to instruct the communication control device based on the evaluation of the value of the predetermined control bit to use the second predetermined frame to request the responder subscriber station to send at least one second signal according to the second predetermined frame via the bus in order to receive status information from the responder subscriber station;
• wherein the responder subscriber station includes:
• a communication control device configured to control communication between the responder subscriber station and the commander subscriber station of the bus system and to evaluating at least one signal received from a bus of the bus system using a frame in which a bit time in the first communication phase can differ from a bit time in the second communication phase, and
• a status information module configured to detect a change in status information of the responder subscriber station,
• wherein the status information module is configured to indicate, after detecting the change in the status information of the responder subscriber station in a predetermined control bit of a frame to be sent by the responder subscriber station to the commander subscriber station for a first message following the change, that a change in the status of the responder subscriber station has occurred,
• wherein the communication control device is configured, upon request from the commander subscriber station, to send a signal for the first message following the change to the bus to the commander subscriber station,
• wherein the status information module is configured to insert the changed status information into a data field of a frame for a second message following the change to the commander subscriber station, and
• wherein the communication control device is configured, upon request from the commander subscriber station, to send a signal for the second message following the change to the bus to the commander subscriber station;
• wherein each of the at least two subscriber stations also includes a transmitting/receiving device configured to transmit a transmission signal to the bus of the bus system and/or to receive a signal from the bus of the bus system.