Safety unit, controller system, connection method of...

Details Safety unit, controller system, connection method of... Safety unit, controller system, connection method of...

2002-05-31

2008-09-30

Hartman, Jr., Ronald D (Department: 2121)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Sequential or selective

C700S079000

Reexamination Certificate

active

07430451

ABSTRACT:
Safety units1dto1ffor executing a safety function processing are connected to a non-safety controller constituted by connectting a plurality of units1b,1cincluding CPU units1a. A CPU bus10to be connected with the CPU units and a safety dedicated bus11for mutually connecting the safety units are provided to the safety units. Since the safety dedicated bus is isolated from the non-safety system, reliability of the safety function can be secured. The CPU unit can read out data through the CPU bus irrespective of the safety unit and the non-safety unit.

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Asthana et al., US Statutory Invention Registration No. H1,882, Oct. 3, 2000, 18 Sheets.
Asthana et al.; US Statutory Invention Registration No. H001,882; Asthana et al.; Oct. 03,2000.

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