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Double-loop sequence control circuit

A sequence control, double-loop technology, applied in the direction of electrical program control, sequence/logic controller program control, etc., can solve the problems of many connections between screens, inconvenient maintenance, high cost, etc., to achieve reliable operation, convenient maintenance, The effect of low cost

Active Publication Date: 2014-01-22
SINOHYDRO BUREAU 11 CO LTD
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AI Technical Summary

Problems solved by technology

For the existing control method, the number of cores of the control cable increases with the increase of the controlled point, so the connection between the screens is too many and complicated, the maintenance is inconvenient, and the cost is also high

Method used

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Embodiment Construction

[0014] A double-loop sequence control circuit, which includes a main control box 1 and a sub-control box controlled by the main control box to start and stop, the sub-control box is composed of a first action box 2, at least one secondary action box 3 and a final action box 4, And the first moving box is the sub-control box of the highest level, and the last moving box 4 is the sub-control box of the lowest level. When opening the action, it acts sequentially from the first moving box to the last moving box.

[0015] A switch QF, a start button TA and a stop button TB are set in the main control circuit of the active box 1, wherein the switch QF is set between the L line and the N line of the three-phase electricity; the start button TA and the stop button TB are respectively set on the L line superior. The above-mentioned main control circuit is connected with the starting circuits of the first moving box 2 , the secondary moving box 3 and the last moving box 4 . Each starti...

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Abstract

A double-loop sequence control circuit comprises a master control box and a sub control box which is controlled by the master control box for starting and stopping. The sub control box is composed of a first motion box, at least one secondary motion box and a final motion box. A mater control loop of the master control box is provided with a switch, a starting button and a stopping button. The master control loop is connected with the starting circuit of the first motion box, the starting circuit of the secondary motion box and the starting circuit of the final motion box. Each starting circuit comprises a starting relay which is connected with the master control loop. The starting relay is serially connected with a normally open contact and an intermediate relay I of the starting relay. The normally open contact of the intermediate relay is arranged in an executing circuit. The executing circuit is composed of executing relays which are serially connected with the normally open contact of the intermediate relay I. The normally open contacts of the executing contacts are arranged in a time delay circuit. The time delay circuit comprises time relays which are serially connected with the normally open contact of the executing relays. The normally open contacts of the time relays are arranged in the starting circuit of a next-stage sub control box.

Description

technical field [0001] The invention relates to a control circuit capable of controlling multiple controlled points. Background technique [0002] For the sequence control of multiple controlled points, such as the sequence control of multiple conveyor belts, the previous practice is to use a multi-core control cable to connect each sub-control cabinet and the main control cabinet. Another way is to use advanced digital electronic equipment such as PLC, computer, etc., to realize sequential start and reverse sequence stop operation. For the existing control method, the number of cores of the control cable increases with the increase of the controlled points, so that the connections between the screens are many and complicated, the maintenance is inconvenient, and the cost is also high. Contents of the invention [0003] The object of the present invention is to provide a control circuit that can realize sequential start and reverse sequence stop operation only by using su...

Claims

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Application Information

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IPC IPC(8): G05B19/04
Inventor 韩欣华
Owner SINOHYDRO BUREAU 11 CO LTD
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