JPS57203130A - Data input controller - Google Patents

Data input controller

Info

Publication number
JPS57203130A
JPS57203130A JP56086854A JP8685481A JPS57203130A JP S57203130 A JPS57203130 A JP S57203130A JP 56086854 A JP56086854 A JP 56086854A JP 8685481 A JP8685481 A JP 8685481A JP S57203130 A JPS57203130 A JP S57203130A
Authority
JP
Japan
Prior art keywords
bit
period
information
status change
virtual input
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.)
Granted
Application number
JP56086854A
Other languages
Japanese (ja)
Other versions
JPH0234071B2 (en
Inventor
Masakazu Okada
Seiichi Yasumoto
Hitoshi Fushimi
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 JP56086854A priority Critical patent/JPS57203130A/en
Publication of JPS57203130A publication Critical patent/JPS57203130A/en
Publication of JPH0234071B2 publication Critical patent/JPH0234071B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/048—Monitoring; Safety

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control By Computers (AREA)
  • Debugging And Monitoring (AREA)

Abstract

PURPOSE:To detect the status change of plant information in high speed, by executing the detection of fetching and its change of the status information of a plant with the hardware and providing a virtual input changed with a prescribed period. CONSTITUTION:When various control parameters are given from a computer program to a data input controller 5, the control for the fetching of information from an input module 6, operation of status change check and report to a main storage device 2 is made under the control of the device 5. On the status change table of the device 2, one bit reflecting the operating state of the device 5 is provided, a prescribed period is monitored with a built-in timer of the device 5, the timer is preset when the period is elapsed for a given time and the corresponding bit of the device 2 is set to 1. This bit is a bit representing the state of the device 5 and a virtual input to the program, and when this is at 1, the device 5 is in normal operating state. The virtual input bit is monitored with a monitoring period of the program longer than the monitor time period, and when this bit is at 0, the device 5 judge the state as failure to output alarm.
JP56086854A 1981-06-08 1981-06-08 Data input controller Granted JPS57203130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56086854A JPS57203130A (en) 1981-06-08 1981-06-08 Data input controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56086854A JPS57203130A (en) 1981-06-08 1981-06-08 Data input controller

Publications (2)

Publication Number Publication Date
JPS57203130A true JPS57203130A (en) 1982-12-13
JPH0234071B2 JPH0234071B2 (en) 1990-08-01

Family

ID=13898394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56086854A Granted JPS57203130A (en) 1981-06-08 1981-06-08 Data input controller

Country Status (1)

Country Link
JP (1) JPS57203130A (en)

Also Published As

Publication number Publication date
JPH0234071B2 (en) 1990-08-01

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