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Method of accessing functions of an embedded device

專利號
US10867077B2
公開日期
2020-12-15
申請人
Schneider Electric Automation GmbH（DE Marktheidenfeld）
發(fā)明人
Ralf Berner; Thomas Gleixner
IPC分類
G06F21/76; G05B19/042; G05B19/05; G06F21/31; G06F21/60
技術領域
embedded,functional,level,access,device,in,can,firewall,key,management
地域： Marktheidenfeld

摘要

A method for accessing functions of an embedded device, for example a controller programmable from memory, wherein function blocks of the embedded device are assigned to at least two hierarchically superimposed levels, an access to a function block of the embedded device occurs from outside of the embedded device by a data interface, and for access an authentication must occur for the level to which the respective function block is assigned, and again for each individual level above the level to which the function block is assigned, to permit execution of a function of the function block, wherein the functions of the function blocks permit access to a firmware of the embedded device.

說明書

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Accesses to the monitoring service 24 require an authentication process 34 for the third level 22, for which purpose the key management 70 communicates with the monitoring service 24. The hot code swap service 60 is likewise associated with the third level 22 (not shown in FIG. 1) so that the key management also communicates with the hot code swap service 60. A data exchange between the key management 70 and the web server 20 takes place for accesses to the web server 20.

In addition to accesses to the hardware level 36 and to the operating system 46, the key management can also carry out an authentication process 34 for the user program 64, whereby, for example, blocked parts of the user program 64 can be executed.

Depending on the importance of the different functional blocks 20, 24, 28, 32, 60, a different safety level can be generated by the breakdown of the PLC 10 into different levels 18, 22, 26, 30 and to the association of different functional blocks 20, 24, 28, 32, 60 with these levels. In this respect, a weighing up can be made between the required effort and the required safety level.

REFERENCE NUMERAL LIST

  • 10 PLC
  • 12 Ethernet connector
  • 14 firewall
  • 16 firewall rules
  • 18 fourth level
  • 20 web server

權利要求

1
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