JPS57209510A - Level controller - Google Patents

Level controller

Info

Publication number
JPS57209510A
JPS57209510A JP9575381A JP9575381A JPS57209510A JP S57209510 A JPS57209510 A JP S57209510A JP 9575381 A JP9575381 A JP 9575381A JP 9575381 A JP9575381 A JP 9575381A JP S57209510 A JPS57209510 A JP S57209510A
Authority
JP
Japan
Prior art keywords
level
register
time
present
calculated
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
JP9575381A
Other languages
Japanese (ja)
Inventor
Hiroshi Okamoto
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP9575381A priority Critical patent/JPS57209510A/en
Publication of JPS57209510A publication Critical patent/JPS57209510A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

PURPOSE:To obtain a controller with stable characteristics, ease of usage, small size and low cost for continuous detection, by calculating a present level from a level change speed obtained in advance and a difference between a time when an objective level passes through a prescribed position and the present time. CONSTITUTION:A pass time of a level l2 is temporarily stored in a register 31. The content of the register 31 is subtracted from the present time of a register 22, and a liquid level where it is assumed that no liquied is supplied independently of an input valve being turned on with a level lowering calculating program of a storage section 18 because of the judgement of the lower limit of level failure, is calculated. If the calculated value is greater than a failure lower limit value lu of a register 30, a pass time of the level l2 of the register 31 is subtracted from the present time of the register 22, the present estimate level is calculated with a level rising program, and the continuous display of level is made at a digital display 33, to decide whether the liquied level is greater than a control upper limit l1 or not.
JP9575381A 1981-06-19 1981-06-19 Level controller Pending JPS57209510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9575381A JPS57209510A (en) 1981-06-19 1981-06-19 Level controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9575381A JPS57209510A (en) 1981-06-19 1981-06-19 Level controller

Publications (1)

Publication Number Publication Date
JPS57209510A true JPS57209510A (en) 1982-12-22

Family

ID=14146255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9575381A Pending JPS57209510A (en) 1981-06-19 1981-06-19 Level controller

Country Status (1)

Country Link
JP (1) JPS57209510A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61235915A (en) * 1985-04-12 1986-10-21 Tokyo Roki Kk Automatic liquid supply device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61235915A (en) * 1985-04-12 1986-10-21 Tokyo Roki Kk Automatic liquid supply device

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