Monitoring method and apparatus using a programmable logic contr

Details Monitoring method and apparatus using a programmable logic contr Monitoring method and apparatus using a programmable logic contr

1995-03-30

1997-03-25

Gordon, Paul P.

Boots, shoes, and leggings

364141, G05B 1500, G05B 1918

Patent

active

056151047

ABSTRACT:
A method for monitoring the operation of a plurality of programmable devices in a system which controls the programmable devices, and corresponding apparatus for monitoring the same. The employs two CPUs. One of the CPUs is controlled to communicate with the programmable logic controller of the system, specifically, to process devices read from the PLC, and to return the result to a two-port memory. The other CPU is controlled to read the result from the two-port memory and display it on the CRT, thus enabling a monitor display, which displays the operation of the programmable device, to have a fast response time.

REFERENCES:
patent: 4471348 (1984-09-01), London et al.
patent: 4636858 (1987-01-01), Hague et al.
patent: 4961131 (1990-10-01), Ashida
patent: 5093902 (1992-03-01), Tokumitsu

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