System for data transfer where multi-word data transmission from

Details System for data transfer where multi-word data transmission from System for data transfer where multi-word data transmission from

1998-05-28

2000-03-28

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral configuration

700 3, 700 7, 710 7, 710 14, 710 32, 710 19, 714 24, G06F 1310

Patent

active

06044410&

ABSTRACT:
A communication protocol employing dummy input and output values is used in communicating blocks of data between an industrial controller and its I/O modules while preventing premature use of partially transmitted data by the I/O modules yet without the need for special handshaking type circuitry or the continuous overhead of such handshaking protocols.

REFERENCES:
patent: 3997879 (1976-12-01), Markley et al.
patent: 4038533 (1977-07-01), Dummermuth et al.
patent: 4165534 (1979-08-01), Dummermuth et al.
patent: 4228495 (1980-10-01), Bernhard et al.
patent: 4750150 (1988-06-01), Weppler
patent: 5202964 (1993-04-01), Crouch
patent: 5463735 (1995-10-01), Pascucci et al.

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