A method for secure communication between a master and a slave of a bus system includes exchanging a telegram between the master and the slave. The telegram has a first region and a second region. The first region contains a predefined instruction. The second region is filled at least in part with a free instruction. A communication system and a system or an industrial system are also provided.

A multi-axis servo control system includes a plurality of motors and a plurality of drive control apparatuses. The drive control apparatuses are connected to each other through an external field bus. Each drive control apparatus includes a control unit and a plurality of drive units. The drive units are connected to the control unit in series by a plurality of local buses to form a series-connected communication loop of sequentially transmitting data. Each drive unit controls at least one of the motors. The control unit receives multi-axis position commands through the external field bus, and the drive units correspondingly receive multi-axis commands through the local buses so as to control the motors in a decentralization manner.

A circuit for coupling a field bus and a local bus. A field bus controller is equipped to send and receive process data over the field bus. A local bus controller is equipped to send and receive the process data over the local bus. A data management unit is connected to the field bus controller and the local bus controller. The data management unit is equipped to transfer the process data between field bus controller and local bus controller. A memory area connected to the data management unit for copying and storing the process data. A processor connected to the data management unit and connected to the memory area. The processor is equipped to set up the data management unit to copy the process data into the memory area and the processor is equipped to read out the process data copied in the memory area.

An automation facility and method for expanding the automation facility with at least one field device, wherein expansion of the expansion of the automation facility with a further field device occurs in a simplified manner such that no disruptive influence on process control during the expansion occurs.

A process control arrangement (PKA), having a number of fieldbus systems (DP1, PA1, FH), especially different fieldbus systems (DP1, PA1, FH), and having a number of fieldbus interfaces (PAP1, PAP2, PAP3), wherein each of the fieldbus systems (DP1, PA1, FH) is connected to at least one of the fieldbus interfaces (PAP1, PAP2, PAP3), wherein the fieldbus interfaces (PAP1, PAP2, PAP3) serve for communication between the fieldbus systems (DP1, PA1, FH) and a communication plane (ET2) superordinated to the fieldbus systems, only a first of the fieldbus interfaces (PAP1) is directly connected to the superordinated communication plane (ET2), and wherein the fieldbus interfaces (PAP1, PAP2, PAP3) are connected in series with one another beginning with the first of the fieldbus interfaces (PAP1).

An automation device includes a master module, and a slave unit having a slave modules, where an interface module (IM) of the slave modules of the slave unit is connected to the master module via a bus, where each of the modules is parameterizable using a message transmitted to the IM by the master module, the message includes a data area for each of the slave modules for parameterization of each of the slave modules, and the message includes a data area for each slave module for its parameterization, wherein at least one default parameter data record is stored in at least one of the slave modules, and wherein a data record index, which is stored in that data area of the message which is provided for the at least one slave module is provided for accessing the at least one default parameter data record.

A field device that communicates in accordance with Ethernet signaling is provided. The field device is powered by virtue of its Ethernet connection. The field device preferably includes a feature board that includes an Ethernet network connection and a field device connection. The feature board is configured to power the field device with power received through the Ethernet network connection. The feature board interacts with the field device using a process industry standard communication protocol. A method of operating a field device is also provided.

An automation facility and method for expanding the automation facility with at least one field device, wherein expansion of the expansion of the automation facility with a further field device occurs in a simplified manner such that no disruptive influence on process control during the expansion occurs.

A gateway for a fieldbus system for connecting a controller to an industrial plant having a plurality of different components. The gateway includes at least one component interface via which the different components can be connected simultaneously or sequentially, a control interface to which a controller of the industrial plant can be connected, and a data processing module which, when at least one of the components is connected to the at least one component interface, is configured to identify the at least one component on the basis of a hardware address assigned thereto and to communicate with the at least one component via the component interface, and which, when the controller is connected to the control interface, is configured to communicate with the controller and to represent the at least one component with respect to the controller as a function-based representation. Furthermore, a fieldbus system is described.

An adapter for an automation field device comprises a first communications interface designed for linking to a HART or 4-20 mA communications loop; a second communications interface designed for linking to a Foundation Fieldbus or Profibus PA Fieldbus based on Manchester Bus Powered transmission technology; an electronics unit with operating software that instructs the electronics unit to convert HART or 4-20 mA telegrams sent by the field device and incoming at the first communications interface into Foundation Fieldbus- or Profibus PA-compatible telegrams and to output same via the second communications interface, and/or to convert Foundation Fieldbus or Profibus PA telegrams incoming at the second communications interface into HART- or 4-20 mA-compatible telegrams and to output same via the first communications interface; and a power supply unit designed to tap electrical energy from the Foundation Fieldbus or Profibus Fieldbus via the second communications interface.