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Control and data transmission installation and a process for the transmission of safety-related data

  • US 6,347,252 B1
  • Filed: 09/24/1998
  • Issued: 02/12/2002
  • Est. Priority Date: 09/26/1997
  • Status: Expired due to Term
First Claim
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1. A control and data transmission installation, including:

  • a serial field bus; and

    a master control device and a plurality of bus subscribers connected to the serial field bus, wherein the master control device includes one of a set of safety-related devices, each of the bus subscribers includes another one of the set of safety-related devices, and the safety-related devices are configured to carry out predetermined safety functions and to communicate with each other via the serial field bus;

    wherein each of the bus subscribers is connected to the serial field bus by a bus connecting device;

    wherein the bus connecting devices transmit safety-related data which are to be exchanged between the safety-related devices and which represent the safety condition of the respective bus subscribers via the serial field bus in useful data fields of predetermined data frames;

    wherein said one of the safety-related devices included in the master control device has a receiving device for receiving the safety-related data of each of the bus subscribers, an evaluation device for evaluating the received safety-related data and a device which, in response to the evaluated data, produces new safety-related data which are intended for the respective bus subscriber and which correspond to a predetermined safety function;

    wherein each of the safety-related devices has at least one input connected to a monitoring device;

    wherein said each of the safety-related devices is configured to negate an output signal of the monitoring device and to produce from the output signal and/or its negated output signal an item of check information representing the safety-related data to be transmitted;

    wherein the receiving device is adapted to receive the safety-related data, the negated data thereof and the check information; and

    wherein the producing device is adapted to produce the new safety-related data, the negated data thereof and a new item of check information.

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