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JPS5459579A - Digital type controller - Google Patents

Digital type controller

Info

Publication number
JPS5459579A
JPS5459579A JP12509877A JP12509877A JPS5459579A JP S5459579 A JPS5459579 A JP S5459579A JP 12509877 A JP12509877 A JP 12509877A JP 12509877 A JP12509877 A JP 12509877A JP S5459579 A JPS5459579 A JP S5459579A
Authority
JP
Japan
Prior art keywords
service
retained
interruption
multiplexer
digital
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12509877A
Other languages
Japanese (ja)
Inventor
Junichi Oizumi
Takeshi Hirayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12509877A priority Critical patent/JPS5459579A/en
Publication of JPS5459579A publication Critical patent/JPS5459579A/en
Pending legal-status Critical Current

Links

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  • Power Sources (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE: To effect protection during interruption of service with the use of a simple construction by timely store in an outside memory the data which are necessary to be retained even during the interruption of service.
CONSTITUTION: A digital controller receives input signals Vil to Vin from a multiplexer 1 to convert them into digital values with the use of an AD converter so that they are fed through an input port 3 into a digital operating portion 4 thereby to accomplish the preset operation. The resultant output is generated through the input port 3, a DA converter 5 and a multiplexer 6 thereby to control the process. The port 3 is connected with a CMOS RAM 8 of low capacity and power consumption so that the data to be retained during interruption of service are stored. Even in case the service of a system power source is interrupted, the power source of the RAM 8 is supplied from a capacitor C and is retained until the system restores.
COPYRIGHT: (C)1979,JPO&Japio
JP12509877A 1977-10-20 1977-10-20 Digital type controller Pending JPS5459579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12509877A JPS5459579A (en) 1977-10-20 1977-10-20 Digital type controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12509877A JPS5459579A (en) 1977-10-20 1977-10-20 Digital type controller

Publications (1)

Publication Number Publication Date
JPS5459579A true JPS5459579A (en) 1979-05-14

Family

ID=14901795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12509877A Pending JPS5459579A (en) 1977-10-20 1977-10-20 Digital type controller

Country Status (1)

Country Link
JP (1) JPS5459579A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58119001A (en) * 1982-01-05 1983-07-15 Yokogawa Hokushin Electric Corp Analog output equipment
JPS61110813A (en) * 1984-11-02 1986-05-29 Matsushita Electric Ind Co Ltd Control device of burning appliance
JPS62213615A (en) * 1986-03-14 1987-09-19 Matsushita Electric Ind Co Ltd Control device for hot water supplier and the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58119001A (en) * 1982-01-05 1983-07-15 Yokogawa Hokushin Electric Corp Analog output equipment
JPS61110813A (en) * 1984-11-02 1986-05-29 Matsushita Electric Ind Co Ltd Control device of burning appliance
JPS62213615A (en) * 1986-03-14 1987-09-19 Matsushita Electric Ind Co Ltd Control device for hot water supplier and the like

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