Assembly Comprising a Tachograph
First Claim
1. An arrangement (1) having a tachograph (DTCO) and having a data store (13, 14), particularly a data store (13, 14) on a data card (4, 5), where the tachograph (DTCO) has an interface which is used for data interchange between the tachograph (DTCO) and the data store (13, 14), which tachograph (DTCO) has logic functional modules (FM) and at least one memory (DMEM), characterizedin that the logic functional modules (FM) are in a form such that at the start of the data transmission a virtual map (VI) (VI) of the data store (13, 14) is first of all created in the memory (DMEM) of the tachograph (DTCO), subsequent read and write access operations by the logic functional modules (FM) are first of all effected on the virtual map (VI) (VI) in the memory (DMEM), and a write operation is regularly effected by accessing the data store (13, 14) on the data card (4, 5), during which the differences between the virtual map (VI) (VI) and the data store (13, 14) are aligned.
2 Assignments
0 Petitions
Accused Products
Abstract
An assembly has a tachograph and a data memory, in particular a data memory of a data card. The tachograph has an interface designed to exchange data between the tachograph and the data memory, logic function modules and at least one memory. In a method for operating the tachograph, as a result of high security requirements, the data transfer between the data memory and the tachograph is extremely time-intensive. At the start of the data transfer a virtual reproduction of the data memory is created in the memory of the tachograph and the logic function modules first have read and write access to the virtual reproduction in the memory. Data is then regularly written to the data memory of the data card by a write access to the memory, thus eliminating the differences between the virtual reproduction and the data memory.
16 Citations
21 Claims
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1. An arrangement (1) having a tachograph (DTCO) and having a data store (13, 14), particularly a data store (13, 14) on a data card (4, 5), where the tachograph (DTCO) has an interface which is used for data interchange between the tachograph (DTCO) and the data store (13, 14), which tachograph (DTCO) has logic functional modules (FM) and at least one memory (DMEM), characterized
in that the logic functional modules (FM) are in a form such that at the start of the data transmission a virtual map (VI) (VI) of the data store (13, 14) is first of all created in the memory (DMEM) of the tachograph (DTCO), subsequent read and write access operations by the logic functional modules (FM) are first of all effected on the virtual map (VI) (VI) in the memory (DMEM), and a write operation is regularly effected by accessing the data store (13, 14) on the data card (4, 5), during which the differences between the virtual map (VI) (VI) and the data store (13, 14) are aligned.
Specification