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Master station apparatus in supervisory and control system

  • US 4,816,988 A
  • Filed: 08/03/1982
  • Issued: 03/28/1989
  • Est. Priority Date: 08/31/1981
  • Status: Expired due to Fees
First Claim
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1. A master station apparatus in a supervisory and control system of supervising or remotely controlling a plurality of devices to be controlled, comprising:

  • a card on which device specifying information for specifying any of said plurality of devices to be controlled is man-readably and machine readably recorded,card reader means for receiving said card for mechanically reading out said device specifying information recorded on the card,said card reader means including a card returning means for returning said card, and which further comprises means for providing a return command to said card returning means,said means a for providing said return command comprising a reset switch, and which further comprises means for resetting said master station apparatus to an initial state in response to a signal form said reset switch;

    status memory means for storing the present status of each of said devices to be controlled,video display means,displaying means including means for reading out from said status memory means the present status of a device to be controlled specified by said device specifying information from said card reader means and for displaying the status on said video display means,control operating means for controlling the device specified by said card for generating a control command for varying the status thereof by a manual operation, andcontrol command transmitting means for applying the control command from said control operation means to said specified device to be controlled.

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