Central processing unit for a process control system
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United States of America Patent
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Feb 6, 2001
Grant Date -
N/A
app pub date -
Sep 28, 1993
filing date -
Sep 28, 1992
priority date (Note) -
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Abstract
A process system, for example a storage-programmable control, having a central unit (1) and a number of peripheral devices, for instance I/O assemblies, controller assemblies, etc., which are connected to the central unit (1) via a bus system (7). The central unit (1) includes two processor systems (2, 4) which are separate from each other, one processor system (2) processing real-time tasks and one processor system (4) processing tasks which are not time-critical. The bus system (7) is split into two separate, individual buses (7', 7') which are associated with the processor systems (2, 4). In this way, the processor systems (2, 4) are uncoupled from each other upon access to the bus system (7).
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