PERIPHERAL DEVICE OF PROGRAMMABLE CONTROLLER

Title:

PERIPHERAL DEVICE OF PROGRAMMABLE CONTROLLER

Document Type and Number:

WIPO Patent Application WO/2000/072099

Kind Code:

A1

Abstract:

A monitoring request command issuing side shared memory (14) in which a list containing devices monitored in response to a monitoring request is provided between a monitoring application executing unit (11) and monitoring request command issuing means (13); a monitoring data acquiring side shared memory (16) in which monitoring data acquired by monitoring data acquiring means (15) is written is provided between the monitoring application executing unit (11) and the monitoring data acquiring means (15). The monitoring request command issuing means (13), the monitoring data acquiring means (15), and the monitoring application executing unit (11) can be operated asynchronously, data flow is limited to one direction, and the exclusive control of the shared memories is an irreducible minimum.

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Inventors:

NIHEI TAKAYUKI (JP)

Application Number:

PCT/JP1999/002737

Publication Date:

November 30, 2000

Filing Date:

May 25, 1999

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
NIHEI TAKAYUKI (JP)

International Classes:

G05B19/05; (IPC1-7): G05B19/05

Foreign References:

JPH08272428A	1996-10-18
JPS60217411A	1985-10-31

Attorney, Agent or Firm:

Sakai, Hiroaki (Kasumigaseki 3-chome Chiyoda-ku Tokyo, JP)

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