Title:
BACKUP SYSTEM OF PULSE INTEGRATING SYSTEM
Document Type and Number:
Japanese Patent JPS59108101
Kind Code:
A
Abstract:
PURPOSE:To simplify backup when a pulse operating system is abnormal by counting up pulses by a counter when a digital operator is abnormal, and adding the pulses to a pulse integrator in the digital operator at the recovery of abnormity to compensate the counted value. CONSTITUTION:When the digital operator 1 is abnormal, pulse signals are counted by using a relay 6 and the counter 7. At the recovery of the abnormity, the relay 6 is turned off, the pulse signals are inputted to the operator 1 through a contact 6b and the pulse integrator 4 starts integration again. At that time, the operator adds a data value displayed on a display device 9 to the integrator 4 in the operator by using a keyboard 10 to compensate the data value. Consequently, backup can be attained without doubling the operator 1 at the abnormal state of the pulse integrating system.
Inventors:
HISAYOSHI GI
Application Number:
JP21690882A
Publication Date:
June 22, 1984
Filing Date:
December 13, 1982
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G05B9/03; G05B7/02; G06F11/16; G06F11/20; H03K21/40; (IPC1-7): G05B7/02; G05B9/03; G06F3/04; H03K21/00
Attorney, Agent or Firm:
Akio Takahashi
Previous Patent: JPS59108100
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