G - Physics – 06 – F
Patent
G - Physics
06
F
354/230.3
G06F 13/22 (2006.01) G05B 19/05 (2006.01) G06F 13/28 (2006.01)
Patent
CA 1174369
PROGRAMMABLE CONTROLLER FOR EXECUTING BLOCK TRANSFER WITH REMOTE I/O INTERFACE RACKS Abstract of the Disclosure A programmable controller has a main processor and a scanner circuit that is connected through a multi-channel, multi-drop serial data link to a plurality of remotely located I/O racks. The I/O racks are adapted for connection to I/O devices which control a machine or process. The I/O racks each have an adapter module that communicates with a plurality of I/O modules in its rack. The adapter modules in the various racks are connected through the serial data link to a scanner circuit. Using a series of messages, the scanner circuit and the adapters couple both words of I/O status data for low density I/O modules and blocks of I/O status data for high density I/O modules. The scanner circuit also interfaces the main processor to the serial data link, coupling both conventional I/O status data and blocks of I/O status data from the main processor and organizing this data in messages for transmission over the serial data link.
392079
German Mark J.
Schultz Ronald E.
Veres Jonathan S.
Allen-Bradley Company Inc.
Fetherstonhaugh & Co.
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