Method for transmitting telegrams between a control device and a peripheral element via an intermediate device
AssigneeSiemens Aktiengesellschaft
InventorsJohannes Extra, Hermann Jartyn
Life of this patent
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Abstract
For the transmission of a telegram from the control device to the peripheral element an intermediate device receives the telegram from the control device and forwards it without amendment to the peripheral element. For the transmission of a telegram from the peripheral element to the control device the intermediate device receives the telegram from the peripheral element and forwards it without amendment to the control device. The telegrams are safety telegrams, so that telegrams forwarded to the control device or to the peripheral element from the respective receiving unit can be checked for freedom from errors.
Claims13
-11. (canceled)
A method for transmitting telegrams between a control device and a peripheral element, comprising:
- receiving the telegrams by an intermediate device in a context of a switching functionality;
- temporarily storing the telegrams in a buffer;
- forwarding the telegrams at latest after a maximum buffer time without amendment between the control device and the peripheral element in the context of the switching functionality;
- checking the telegrams for freedom from errors by the control device and the peripheral element;
- and
- locking out a write access to the buffer by the intermediate device in a context of a dedicated functionality.
A data medium executed on an intermediate device for transmitting telegrams between a control device and a peripheral element, comprising:
- a computer program for:
- receiving the telegrams by the intermediate device in a context of a switching functionality,
- temporarily storing the telegrams in a buffer,
- checking the telegrams for freedom from errors by the control device and the peripheral element,
- forwarding the telegrams at latest after a maximum buffer time without amendment between the control device and the peripheral element in the context of the switching functionality, and
- locking out a write access to the buffer by the intermediate device in a context of a dedicated functionality.
An intermediate device for transmitting telegrams between a control device and a peripheral element, comprising:
- a program memory that stores a computer program;
- and
- a microprocessor that executes the computer program for:
- receiving the telegrams by the intermediate device in a context of a switching functionality,
- temporarily storing the telegrams in a buffer,
- checking the telegrams for freedom from errors by the control device and the peripheral element,
- forwarding the telegrams at latest after a maximum buffer time without amendment between the control device and the peripheral element in the context of the switching functionality, and
- locking out a write access to the buffer by the intermediate device in a context of a dedicated functionality.
Dependencies are inferred from the claim text.