JPS6465603A - Highly integrated control panel - Google Patents

Highly integrated control panel

Info

Publication number
JPS6465603A
JPS6465603A JP22191387A JP22191387A JPS6465603A JP S6465603 A JPS6465603 A JP S6465603A JP 22191387 A JP22191387 A JP 22191387A JP 22191387 A JP22191387 A JP 22191387A JP S6465603 A JPS6465603 A JP S6465603A
Authority
JP
Japan
Prior art keywords
power failure
time
state
power
contact device
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
JP22191387A
Other languages
Japanese (ja)
Inventor
Tomonori Kaneko
Mikio Yoda
Hideo Onishi
Shoichi Yasuda
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 JP22191387A priority Critical patent/JPS6465603A/en
Publication of JPS6465603A publication Critical patent/JPS6465603A/en
Pending legal-status Critical Current

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  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE:To accurately control an electromagnetic contact device by accurately recognizing the state of the contact device held before power failure and its power failure time at the time of restoring the power failure and controlling the state of the contact device at the time of power restoration based on said recognition in accordance with the characteristics of a plant to be applied. CONSTITUTION:At the time of power restoration after a certain power failure time, an MPU 52 in a sequence control device 38 recognizes the state of a keep relay 63 storing the state of the electromagnetic contact device 27 through a DI/DO 60 based on a power restoration processing program previously programmed in a ROM 58. On the other hand, the voltage of a capacitor 65 for storing power failure time is measured through an AI 61 and the power failure time is recognized from a capacitor discharge characteristic curve stored in a RAM 59 based on the measured result. When the power failure time is included within a prescribed time, the contact device 27 is turned to the state held before the power failure after power restoration, and when the power failure exceeds the prescribed time, the contact devices 27 are uniformly turned off after power restoration. Thus, the contact devices 27 can be accurately controlled.
JP22191387A 1987-09-07 1987-09-07 Highly integrated control panel Pending JPS6465603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22191387A JPS6465603A (en) 1987-09-07 1987-09-07 Highly integrated control panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22191387A JPS6465603A (en) 1987-09-07 1987-09-07 Highly integrated control panel

Publications (1)

Publication Number Publication Date
JPS6465603A true JPS6465603A (en) 1989-03-10

Family

ID=16774120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22191387A Pending JPS6465603A (en) 1987-09-07 1987-09-07 Highly integrated control panel

Country Status (1)

Country Link
JP (1) JPS6465603A (en)

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