04293924 is referenced by 42 patents and cites 7 patents.

A programmable controller has a high density I/O module for interfacing eight analog input devices to a main processor module. The high density I/O module has a microcomputer for reading, storing and updating eight words of input data. The microcomputer also communicates with the main processor of the main processor module to transfer the eight words of input status data to a main memory. The main processor is programmed to communicate with the microcomputer in two alternate modes. In one mode the main processor is directed by an applications control program to individually couple words of the status data; in the other mode the main processor is directed by firmware instructions to alter the input/output scan and couple a block of input data.

Title
Programmable controller with high density intelligent I/O interface
Application Number
6/43886
Publication Number
4293924
Application Date
May 30, 1979
Publication Date
October 6, 1981
Inventor
Craig A Black
Lyndhurst
OH, US
Ronald A Brown
Willowick
OH, US
Odo J Struger
Chagrin Falls
OH, US
Agent
Quarles & Brady
Assignee
Allen Bradley Company
WI, US
IPC
G06F 9/22
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