G - Physics – 06 – F
Patent
G - Physics
06
F
354/105, 354/232
G06F 13/38 (2006.01) G06F 11/277 (2006.01) G06F 13/22 (2006.01) G06F 13/24 (2006.01)
Patent
CA 1070848
Abstract of the Disclosure Digital data, in the form of serial station bit frames which exclude protocol information, are communicated bidirectionally over a plurality of serial transmission channels to peripheral devices in a di?ital process control system. Data enters and leaves a process control computer input-output section serially in response to software- generated control signals. Serial-to-parallel station interfaces having simplified disign are located along each channel. Each interface has a multifunctional shift register responding to the control signals to provide not only bidirectional data flow through station, but simultaneous parallel loading of each peripheral device. One software control logic arrangement eliminates modems and traditional hardwired data flow control logic elements in each station interface, yet operates with a station bit frame which excludes protocol information. Also provided are: true interrupt capability at each interface; verification of every bit of input and/or output of each station interface; and improved interface diagnostics.
262998
Bethlehem Steel Corporation
Na
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