Title:
CONTROL SYSTEM, MASTER PROGRAMMABLE CONTROLLER, SLAVE PROGRAMMABLE CONTROLLER, AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2014/108999
Kind Code:
A1
Abstract:
In a control method which performs control using a plurality of control units which combine a controlled apparatus (130) with a programmable controller (120), the programmable controllers establish communication with one another, and share data using common memory. In addition, a master programmable controller, upon receiving a reception completion frame which is a response to a transmission delay time request frame, calculates a transmission delay time on the basis of the difference between the time when the transmission delay time request frame was transmitted and the time when the reception completion frame was received, and transmits a transmission delay time notification frame including the transmission delay time to a slave programmable controller, whereupon the slave programmable controller, upon receiving the transmission delay time notification frame, acquires the transmission delay time included in the transmission delay time notification frame, and on the basis of the transmission delay time, synchronizes the slave programmable controller with the master programmable controller.
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Inventors:
YUO YUKITERU (JP)
FUJIMORI AKIRA (JP)
FUJIMORI AKIRA (JP)
Application Number:
PCT/JP2013/050121
Publication Date:
July 17, 2014
Filing Date:
January 08, 2013
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD (JP)
International Classes:
G05B19/05
Foreign References:
| JPH04135210A | 1992-05-08 | |||
| JP2007226492A | 2007-09-06 | |||
| JPH02179221A | 1990-07-12 | |||
| JP2009157913A | 2009-07-16 | |||
| JP2001075932A | 2001-03-23 |
Attorney, Agent or Firm:
AOMI PATENT (JP)
Patent business corporation Omi patent firm (JP)
Patent business corporation Omi patent firm (JP)
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