Abstract: An I/O module comprising an input interface, designed for connection to at least one sensor for input of an input signal, and/or an output interface, designed for connection to at least one actuator for output of an output signal, with a data interface for connection to a sub-bus for the transmission of an input datum and/or output datum, and with a control unit connected to the data interface and connected to the input interface and/or the output interface, wherein the control unit is set up to process the input datum and/or output datum and exchange it via the data interface, wherein the control unit is further set up to store a predetermined input value and/or output value which replaces the input datum and/or output datum.

Abstract: A method for operating a bus system of an automation system, wherein the bus system has an Ethernet-based network and a coupler and a local bus and a local bus user. An Ethernet telegram is received via the Ethernet-based network at the coupler, wherein the Ethernet telegram has an identifier associated with a fieldbus protocol wherein the Ethernet telegram has process data, conforming to the fieldbus protocol, for the local bus user. The process data is acquired and the identifier from the Ethernet telegram by the coupler. A local bus telegram is generated by the coupler, wherein the local bus telegram has a local-bus-specific local bus header and a local bus payload section. The process data is inserted, together with the identifier, into the local bus telegram by the coupler. The local bus telegram is transmitted from the coupler to the local bus user.

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.

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.