JPS57206909A - Sequence control unit - Google Patents

Sequence control unit

Info

Publication number
JPS57206909A
JPS57206909A JP9114681A JP9114681A JPS57206909A JP S57206909 A JPS57206909 A JP S57206909A JP 9114681 A JP9114681 A JP 9114681A JP 9114681 A JP9114681 A JP 9114681A JP S57206909 A JPS57206909 A JP S57206909A
Authority
JP
Japan
Prior art keywords
turned
terminal
memory
level
output
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
JP9114681A
Other languages
Japanese (ja)
Inventor
Kenichi Yoda
Masahiko Kitamura
Hitoshi Kondo
Toshiro Onoki
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP9114681A priority Critical patent/JPS57206909A/en
Publication of JPS57206909A publication Critical patent/JPS57206909A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/004—Error avoidance
    • 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
    • G05B19/10—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using selector switches
    • G05B19/102—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using selector switches for input of programme steps, i.e. setting up sequence
    • 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
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/14—Plc safety
    • G05B2219/14053—Power failure, loss, abnormal battery
    • 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
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/15—Plc structure of the system
    • G05B2219/15098—Switching power on only when system needs control, stand by

Abstract

PURPOSE:To prevent the titled unit from error operation at the time of power supply by connecting an output terminal of a voltage detecting circuit which turns a detection signal of a voltage detecting element for detecting power voltage to the L level to an OE terminal of a memory. CONSTITUTION:Until charging through a voltage regulator diode of a capacitor C in a voltage detecting circuit 7 is completed, a transistor TR Q3 is on, an OE terminal is the H level and the output circuit of a memory 5 is broken. When the TR Q3 is turned on and the OE terminal is turned to the L level accompanied with the charging of the capacitor C, the output circuits of the memory 5 is actuated. If a start signal is inputted to a start input terminal 3, a TR Q1 is turned on and a CE terminal 5a is turned to the L level, so that the memory 5 is selected and a sequence output is outputted. When a stop signal is inputted to a stop input terminal 4, a TR Q2 is turned on, the TR Q1 is turned off and the memory 5 is put waiting.
JP9114681A 1981-06-12 1981-06-12 Sequence control unit Pending JPS57206909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9114681A JPS57206909A (en) 1981-06-12 1981-06-12 Sequence control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9114681A JPS57206909A (en) 1981-06-12 1981-06-12 Sequence control unit

Publications (1)

Publication Number Publication Date
JPS57206909A true JPS57206909A (en) 1982-12-18

Family

ID=14018380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9114681A Pending JPS57206909A (en) 1981-06-12 1981-06-12 Sequence control unit

Country Status (1)

Country Link
JP (1) JPS57206909A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54102477A (en) * 1978-01-30 1979-08-11 Toyoda Mach Works Ltd Sequence controller output device
JPS5627734B2 (en) * 1973-02-22 1981-06-26

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627734B2 (en) * 1973-02-22 1981-06-26
JPS54102477A (en) * 1978-01-30 1979-08-11 Toyoda Mach Works Ltd Sequence controller output device

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