Adjusting operation change-over controller

  • Inventors:
  • Assignees: Hitachi Ltd
  • Publication Date: September 14, 1979
  • Publication Number: JP-S54118968-A


PURPOSE: To simplify an implementation of circuitry of an adjusting operation change-over controller by constituting the controller such that a changing-over operation between an output of an automatic control system and an output of a manual regulator is effected in a balanceless and bumpless manner. CONSTITUTION: While an automatic control is effective, change-over switches 91, 92 are connected to their A sides so that a signal e 3 representative of the sum if an output e 1 from a recording controller 1 and a feed forward signal e 2 is output by way of an amplifier 8 with being held by a holding condenser 7. While a manual control is effective, the change-over switches 91, 92 are changed over to the M sides so that charge held in the holding condenser 7 can be increased and decreased by operation of push buttons 11, 12 of a manual regulator 6. Simultaneously, a difference between the output e 5 and the recording controller output e 3 is obtained at a comparator 10 and is applied to an integrator circuit of the recording controller 1 whereby e 3 and e 5 are equalized to each other so that a changing over to the automatic control from the manual control could not cause a bump to occur. COPYRIGHT: (C)1979,JPO&Japio




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