Claims
- 1. An operations control system for an effluent monitoring system for controlling a cycle of successive operations upon occurrence of each passage of a predetermined period of time and any of a plurality of different effluent monitoring events so that said operations occuur in predetermined time sequence, said system comprising timing generator means for generating timing signals which occur repetitively with constant periodicity, preset interval timing means for producing first outputs at preset time intervals equal to said predetermined period of time, means responsive to said events and to said preset interval timing means first outputs for generating a start command upon occurence of said first outputs and of any of said plurality of effluent monitoring events, operation timing means responsive to said timing signals and to said start command for producing a cycle of second outputs corresponding to different ones of said successive operations, and operations control means operated by said second outputs for controlling each of said operations.
- 2. The invention as set forth in claim 1 wherein said operations control means includes means responsive to said second outputs for controlling the duration of each of said operations.
- 3. The invention as set forth in claim 2 wherein said operations control means further includes means operated by an input signal for terminating a certain one of said operations upon occurrence of said input signal.
- 4. The invention as set forth in claim 3 wherein said operations control means further includes means for operation by the one of said second outputs which controls the duration of said one operation for terminating said cycle of operation upon occurrence thereof prior to the occurrence of said input signal.
- 5. The invention as set forth in claim 4 wherein said system further comprises fault indicating means operated by said means for terminating said cycle for indicating a fault in the operation of the apparatus controlled by said operations control system.
- 6. The invention as set forth in claim 1 wherein said preset interval timing means is operated by said timing generator means for generating as said first outputs relative signals separated by preset intervals of time, and means included in said start command generating means for generating said start command upon occurrence of each of said preset time interval signals.
- 7. The invention as set forth in claim 6 wherein said start command generating means is a mode selector control unit having a plurality of inputs for enabling the generation of said start commands and a plurality of inputs operative to provide said start commands, one of said plurality of inputs being said predetermined time interval signals.
- 8. The invention as set forth in claim 1 wherein said timing generator means includes a source of constant frequency signals, and said source includes means responsive to the signals from an A.C. power line for dividing the frequency of said A.C. line signals to produce said timing signals.
- 9. The invention as set forth in claim 1 wherein said timing generator means includes a source of constant frequency signals, said source including a plurality of counters for dividing the frequency of said constant frequency signals to produce first and second timing signals having different periodicity, said first signals occurring each second and said second signals occuring at a decimally related fraction of a unit of time which is a multiple of 60 times one second.
- 10. The invention as set forth in claim 9 wherein said preset interval timing means includes means for counting said second signals and producing said first outputs for providing inputs at said preset times to said start command generating means to provide for generation of said start commands at preset intervals of time corresponding to a preset number of said second signals.
- 11. The invention as set forth in claim 10 wherein said operations timing means includes a pair of tandem connected decimal counters responsive to said first timing signals, and means connected to said counters for selectively deriving said outputs.
- 12. The invention as set forth in claim 11 wherein said means for selectively deriving said outputs includes a plurality of pairs of switches, each switch having fixed terminals and a movable arm, said fixed terminals of each switch pair being separately connected to the output terminals of different ones of said pair of counters, and a plurality of gate means separately input connected to the movable arms of each switch pair, said gate means providing said outputs.
- 13. The invention as set forth in claim 12 wherein said operations control means includes control logic means comprising a start flip-flop, means responsive to said start command and to the output of a first of said plurality of gates for conditioning said start flip-flop to produce a drive signal for controlling a first of said operations between the times of occurrence of said start command and said first gate output, said start flip-flop also being connected to said tandem counters to enable said counters to count up between said times of occurrence, a plurality of second flip-flops, means responsive to the outputs of different ones of the others of said plurality of gates for conditioning said plurality of second flip-flops to produce drive signals for controlling others of said plurality of operations between the time of occurrence of different pairs of the outputs from said others of said plurality of gates.
- 14. The invention as set forth in claim 13 wherein said control logic means includes a third flip-flop, means responsive to an input signal for conditioning one of said second flip-flops to terminate its drive signal means, and responsive to said one of said second flip-flops and said input signal for conditioning said third flip-flop to generate another drive signal indicative of a fault in operation when said one of said second flip-flops is conditioned to terminate its drive signal and said input signal is absent.
Parent Case Info
This is a continuation, of application Ser. No. 858,747 filed on Dec. 8, 1977, and now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
Date |
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858747 |
Dec 1977 |
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