Industrial controller with program synchronized updating of back

Details Industrial controller with program synchronized updating of back Industrial controller with program synchronized updating of back

1997-06-13

1999-08-03

Grant, William

Boots, shoes, and leggings

364134, 364184, 364185, 364186, G05B 902

Patent

active

059333472

ABSTRACT:
An industrial control system employs a primary and secondary controller each having a processor and an I/O data table. Updating of the secondary processor's I/O data table is accomplished synchronously with execution of the program in the primary processor at a particular point in the program. A tracking of changes in the I/O data table of the primary processor is used to transmit only changes in the I/O table to the secondary processor thereby avoiding undue interruption of the executing program while preserving synchronicity.

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patent: 5715439 (1998-02-01), Schmidt et al.
patent: 5777874 (1998-07-01), Flood et al.

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