Remote supervision and control system
AssigneeMatsushita Electric Works, Ltd.
InventorsKazuaki Ohnishi, Katsuhiro Ohnuki
Life of this patent
Estimating the term…
Abstract
A system of remote supervising and controlling many console units or equipments associated therewith with a central supervision and control unit. Console units are connected in parallel to the central unit through a single output line comprising a group of wires from the central unit, series signals of clock, data and other pulses are transmitted from the central unit to the respective console units, and signals informing whether the state in the respective console units is normal or not and results of detections of the respective equipments are returned from the console units to the central unit through a signal line in the group of wires.
Claims14
A system for supervising and controlling remote equipment comprising in combination, a central supervision unit, a plurality of console units associated with the respective equipment to be controlled and supervised, a clock pulse line, a data pulse line, a reply pulse line, said lines coupling said supervision unit to said console units;
- said central supervision unit including means for sending out a series of clock pulses on said clock pulse line, means for sending out a series of data pulses on said data pulse line, said data pulses including an address signal part and a control signal part, each of said parts including a plurality of data pulses, and means for receiving a series of reply pulses from said reply pulse line;
- each of said console units comprising a shift register for storing data pulses, an address setting part in which an address assigned to the console unit is preset, a comparator for comparing the data pulses within said register with the address assigned by said address setting part and for producing a concurrent signal when the address signal part of said data pulses corresponds with said assigned address, a control pulse generator for counting said clock pulses and for generating control pulses synchronized with said clock pulses, output means responsive to said comparator said control pulse generator and said data pulses for sequentially directing data pulses within said control signal part to associated equipment in the presence of a concurrent signal, and sending means responsive to said comparator said control pulse generator and signals from associated equipment for sequentially sending reply pulses on said reply pulse line to said central supervision unit in the presence of a concurrent signal, whereby an addressed console unit responds synchronously to the control part of the data pulses after detection of the address assigned thereto.
A system for supervising and controlling remote equipment comprising in combination, a central supervision unit, a plurality of console units associated with the respective equipment to be controlled and supervised, first and second clock pulse lines, a data pulse line, a reply pulse line, said lines coupling said central supervision unit to said console units;
- said central supervision unit including means for sending out a series of first clock pulses on said first clock pulse line and a series of second clock pulses on said second clock pulse line, said first clock pulses being of regular interval and having an on-duty period which is shorter than the off-duty period thereof, said second clock pulses having the same frequency as said first clock pulses and being shifted in phase by 180.degree. from said first clock pulses, means for sending out a series of data pulses on said data pulse line, said data pulses having an address part and a control part, each of said parts including a plurality of data pulses, said data pulses having an on-duty period within the on-duty period of said second clock pulses, and means for receiving reply pulses from said reply pulse line;
- each of said console units comprising a shift register for storing data pulses, an address setting part in which an address assigned to the console unit is preset, a comparator for comparing the data pulses within said register with the address assigned by said address setting part and for producing a concurrent signal when the address part of said data pulses corresponds with said assigned address, a control pulse generator for counting the second clock pulses and generating control pulses synchronized with said second clock pulses, output means responsive to said comparator said control pulse generator and said data pulses for sequentially directing data pulses within said control part to associated equipment in the presence of a concurrent signal, and sending means responsive to said comparator said control pulse generator and signals from associated equipment for sequentially sending reply pulses on said reply pulse line to said central supervision unit in the presence of a concurrent signal, whereby an addressed console unit responds synchronously to the control part of the data pulses after detection of its assigned address.
Dependencies are inferred from the claim text.