I/O scanner for an industrial control

Details I/O scanner for an industrial control I/O scanner for an industrial control

1986-07-28

1988-06-07

Heckler, Thomas M.

Boots, shoes, and leggings

G06F 1546

Patent

active

047501502

ABSTRACT:
The I/O modules for an industrial control processor are connected together in a serial I/O ring. The processor performs an I/O scan sequence in which output data for the I/O modules is shifted serially from an output image table onto the I/O ring and input data from the I/O modules is pushed around the I/O ring and into the processor where it updates an input image table. Each I/O module can be configured to perform digital filtering and input pulse catching on the inputs and to enable a watchdog timer. Configuration data is sent out from the processor like output data and is latched into a configuration latch in the I/O module by a configure command from the processor.

REFERENCES:
patent: 3982230 (1976-09-01), Burkett et al.
patent: 4038533 (1977-07-01), Dummermuth et al.
patent: 4151589 (1979-04-01), Ross
patent: 4254473 (1981-03-01), Galdun et al.
patent: 4354226 (1982-10-01), Flickinger et al.
patent: 4404651 (1983-09-01), Grudowski
patent: 4477882 (1984-10-01), Schumacher et al.

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