JPS6415801A - Closed loop circuit - Google Patents

Closed loop circuit

Info

Publication number
JPS6415801A
JPS6415801A JP16982987A JP16982987A JPS6415801A JP S6415801 A JPS6415801 A JP S6415801A JP 16982987 A JP16982987 A JP 16982987A JP 16982987 A JP16982987 A JP 16982987A JP S6415801 A JPS6415801 A JP S6415801A
Authority
JP
Japan
Prior art keywords
motor
feedback
phase
driven
constitution
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
JP16982987A
Other languages
Japanese (ja)
Inventor
Akira Shima
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP16982987A priority Critical patent/JPS6415801A/en
Publication of JPS6415801A publication Critical patent/JPS6415801A/en
Pending legal-status Critical Current

Links

Landscapes

  • Safety Devices In Control Systems (AREA)
  • Control Of Position Or Direction (AREA)

Abstract

PURPOSE:To avoid such an accident where the positive feedback is applied by mistake and a motor has the runaway by operating the motor after switching a position loop to a speed loop and deciding whether the feedback caused by a feedback signal received from a detector is positive or negative. CONSTITUTION:A speed command is delivered from a variable resistor 18 after a switch 19 is set at the speed loop side and a motor 7 is driven via a servo amplifier 8. In this case, a major roll 13 is driven when the motor 7 is driven forward and then the A-phase and B-phase signals are fed back from an encoder 10. When the A-phase signal is advanced by 90 deg. compared with the B-phase signal, a forward rotation pulse is outputted from a pulse branching circuit 14 and supplied to the DOWN side of an up-down counter 4. At the same time, a clear signal is supplied to a flip-flop 16. Thus an LED 17 is turned on. In such a constitution, the negative feedback is confirmed so that the runaway accident of the motor 7 can be avoided.
JP16982987A 1987-07-09 1987-07-09 Closed loop circuit Pending JPS6415801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16982987A JPS6415801A (en) 1987-07-09 1987-07-09 Closed loop circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16982987A JPS6415801A (en) 1987-07-09 1987-07-09 Closed loop circuit

Publications (1)

Publication Number Publication Date
JPS6415801A true JPS6415801A (en) 1989-01-19

Family

ID=15893684

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16982987A Pending JPS6415801A (en) 1987-07-09 1987-07-09 Closed loop circuit

Country Status (1)

Country Link
JP (1) JPS6415801A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011222019A (en) * 2010-04-09 2011-11-04 Lsis Co Ltd Input module for plc

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011222019A (en) * 2010-04-09 2011-11-04 Lsis Co Ltd Input module for plc

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