Title:
BACKUP METHOD IN DUPLEX CONTROLLING SYSTEM
Document Type and Number:
Japanese Patent JPS5936801
Kind Code:
A
Abstract:
PURPOSE:To shorten switching time and to stabilize control by receiving the data of an output value by a subcontroller when a fault is generated in a main controller, sending the controlled output to a switching part and then receiving data other than the output value to start control. CONSTITUTION:The subcontroller BDC is always held at stand-by status, and when a fault is generated in the main controller MDC, a fault signal is inputted from an OR gate Gm to the switching part SW. Receiving a signal from director DRT, the switching part SW transfers the data of the output value to the subcontroller BDC, after completing transfer, turns a switch S to the subcontroller BDC side and then transfers data other than the output value. After the completing the transfer, the switching part SW commands the start of the control of the subcontroller BDC. The subcontroller BDC stores the data of the output value of the switching part SW in an RAM6 and sends the controlled output immediately. After storing data other than the output value also in the RAM6, the subcontroller BDC starts the control in accordance with the command of control starting.
Inventors:
MOCHIZUKI KIYOSHI
SHIMA MASAO
KOIBUCHI SHIYOUICHI
UCHINUMA SOUICHIROU
TOMITA YASUO
MAGAI ATSUSHI
ABE TOORU
SHIMIZU HIDEYUKI
SHIMA MASAO
KOIBUCHI SHIYOUICHI
UCHINUMA SOUICHIROU
TOMITA YASUO
MAGAI ATSUSHI
ABE TOORU
SHIMIZU HIDEYUKI
Application Number:
JP14809582A
Publication Date:
February 29, 1984
Filing Date:
August 26, 1982
Export Citation:
Assignee:
YAMATAKE HONEYWELL CO LTD
International Classes:
G05B7/02; G06F11/20; (IPC1-7): G05B7/02; G06F11/18
Domestic Patent References:
| JPS52130543A | 1977-11-01 | |||
| JPS5640901A | 1981-04-17 |
Attorney, Agent or Firm:
Masaki Yamakawa
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