Programmable controller with a dual intermodule message system
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United States of America Patent
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Oct 24, 1989
Grant Date -
N/A
app pub date -
Aug 26, 1987
filing date -
Aug 26, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A programmable controller suitable for operating a machine to carry out a plurality of programmed functions includes a plurality of program processors each being operable to execute simultaneously a different control program that directs the programmable controller to operate the machine to perform specific functions. Each of the processors includes a memory having areas for receiving different priority level messages. Each area has an addressable location corresponding to each module in the controller that can send messages. A message may be an executable command or a pointer to an address block containing the message or message access parameters.
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