CN104184385A

CN104184385A - Method for using secondary soft loop in electrical secondary loop

Info

Publication number: CN104184385A
Application number: CN201410449097.4A
Authority: CN
Inventors: 刘彦君
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-09-04
Filing date: 2014-09-04
Publication date: 2014-12-03
Anticipated expiration: 2034-09-04
Also published as: CN104184385B

Abstract

The invention relates to a method for using a secondary soft loop in an electrical secondary loop and belongs to the field of electronic circuits. The method comprises the steps of utilizing an electrical schematic diagram to obtain a single chip microcomputer circuit diagram and welding and assembling elements to form a single chip microcomputer circuit board; programming data in the secondary loop representing the electrical schematic diagram into a single chip microcomputer chip with the single chip microcomputer circuit board according to the electrical schematic diagram; using an obtained single chip microcomputer to replace a coil and a contact in the electrical secondary loop and an auxiliary contact of a primary device to obtain the secondary soft loop; checking and debugging the secondary soft loop, and connecting the secondary soft loop to the primary device for trial run after a working state of the secondary soft loop is normal. The electrical secondary soft loop is used in the electrical secondary loop to replace an existing electrical secondary loop, so that the number of secondary devices can be greatly decreased, a secondary loop wiring process can be further simplified, an occupied space is saved, the stability and safety of the devices are improved, and the cost and maintenance difficulty are further reduced.

Description

In electric secondary circuit, use the method in the soft loop of secondary

Technical field

The present invention relates to a kind of method of using the soft loop of secondary in electric secondary circuit, belong to field of electronic circuitry.

Background technology

Electric secondary device (as relay, measuring instrument, transducer, control switch and signal lamp etc.) is controlled, samples, monitors, communicates by letter, regulates, is protected the operation conditions of primary equipment at present; what generally adopt is that secondary device is assembled in one or several distribution boards; and then each equipment upper terminal in dish is carried out to distribution connection by certain logical relation, form a set of complete secondary circuit.Along with the function of controlling constantly strengthens, number of devices in dish also constantly increases, this method not only control model is single, and workman's needs training of several years ability independent operation of installation distribution board, not only installation procedure complicated also time-consuming, require great effort, expend lot of materials, take larger space, due to complex circuit and be all that manual installation is therefore being difficult to standardization aspect technology, technique, standard, operation troubles rate is high.To regular maintenance, bring very large difficulty.Existing electric secondary distribution board is all according to the operational mode customization of controlled device, must be to the equipment in distribution board and circuit from new installation as changed operational mode.

The soft circuit technology of electric secondary (hereinafter to be referred as the soft circuit technology of secondary) be exactly by single-chip microcomputer (claiming again single chip microcontroller) system employs in electric secondary circuit system.Utilize that single-chip microcomputer volume is little, calculation function is strong, speed is fast, control precision is high, low in energy consumption, peripheral circuit as required can be numerous can letter etc. advantage, replace equipment component in existing secondary circuit (as the coil of signal relay, contact, the coil of the time relay, contact and time-delay mechanism, counting relay etc.) and the function and efficacy of the auxiliary contact (as contactor, thermal relay etc.) of part primary equipment.According to designing requirement, by each pin of single-chip microcomputer, formed coil, contact of equipment needed thereby etc., some logical relation in secondary circuit and function are completed by " data " in singlechip chip, and " electronic switch " or " relay " by port flows to the control unit (as coil, control switch etc.) of primary equipment or as the signal input part (as control modules such as instrument, PLC, frequency converters) of other control appliance using operation result.

Summary of the invention

Originally overcome described problem, the object of the present invention is to provide a kind of method of using the soft loop of secondary at electric secondary circuit.

The object of the invention is to be achieved through the following technical solutions:

The method of using the soft loop of secondary in electric secondary circuit, comprising:

Step 1: obtain single chip circuit figure by electrical schematic diagram;

Step 2: according to described single chip circuit figure, each element soldering group is dressed up to single chip circuit plate;

Step 3: according to electrical schematic diagram, data programming in the secondary circuit representing in described electrical schematic diagram is entered in the single-chip microcomputer with described single chip circuit plate, described data complete logical relation and the function in secondary circuit;

Step 4: the single-chip microcomputer obtaining by above-mentioned steps is replaced to the auxiliary contact of coil, contact and primary equipment in secondary circuit, obtain the soft loop of secondary;

Step 5: check the debugging soft loop of described secondary, after its operating state is normal, be connected test run with primary equipment.

Wherein, step 1 is specially: the logical relation of described single chip circuit is consistent with electrical schematic diagram, determines the circuit of single chip circuit input and output and the element needing, and obtains single chip circuit.

In step 1, in described single chip circuit, each signal source can be connected with single-chip microcomputer respectively.

Preferably, in step 1, in described single chip circuit, the single signal source of function and efficacy is placed on to the head end of SCM peripheral circuit, the signal source of relevance complexity is placed on to the end of SCM peripheral circuit, directly control single chip computer chip pin is used for single-chip microcomputer provides computing information.

Further, in step 3, described data are arranged in the chip of described single-chip microcomputer.

Further, in step 4, the contact in described secondary circuit is respectively coil, the contact of button, the time relay and transducer;

The auxiliary contact of described primary equipment are contactor and thermal relay.

Beneficial effect of the present invention is:

In electric secondary circuit, make the soft loop of electrical installation secondary replace existing secondary circuit, because can greatly reduce the quantity of secondary device, can also simplify secondary circuit distribution operation, saving takes up room and the consumption of material, and enterprise " is saved energy and reduce the cost " and enhanced productivity great help.Can standardized production due to single-chip microcomputer, so not only can improve the stability of equipment and fail safe but also reduced the difficulty of cost and maintenance.

Use " the soft loop of secondary " to there is property versatile and flexible, same single-chip microcomputer can have multiple choices, as being originally, control a motor positive and inverse operational mode, change now the operational mode of controlling two motor sequential firings into, as long as single-chip microcomputer is downloaded to a software program again, then can use from new arrangement phase sequence.

Accompanying drawing explanation

Fig. 1 manually comes and goes electrical schematic diagram automatically;

Fig. 2 is the local connection layout of each signal source and single-chip microcomputer;

Fig. 3 is single chip circuit figure.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

A method of using the soft loop of secondary in electric secondary circuit, specifically comprises:

Step 1: obtain single chip circuit figure by electrical schematic diagram;

Secondary circuit analysis as shown in Figure 1:

Thermal relay FR and stop button SB1 are closure state under normal circumstances, and FR only just can disconnect when overload.

1. from SB1, separate four branch roads, when pressing the coil of SB2 button after-current through the long close point conducting contactor KM1 of SB3, SQ2 and KM2, contactor KM1 adhesive, motor is forward operation.When running to the control point of position transducer SQ2, trigger, forward loop disconnects, and operation stops.After one section of time delay of elapsed time relay K T2, the closed conducting return circuit contactor KM2 adhesive of the auxiliary contact of KT2, motor starts inverted running.

When pressing SB3 electric current through the coil of the long close point conducting contactor KM2 of SB2, SQ1 and KM1, contactor KM2 adhesive, motor is inverted running.When running to the control point of approach switch SQ1, trigger, return circuit disconnects, and operation stops.After one section of time delay of elapsed time relay K T1, the closed conducting return circuit contactor KM2 adhesive of the auxiliary contact of KT2, motor starts inverted running.

First, according to the logical relation design single chip circuit of electrical schematic diagram, determine the element needing at single chip circuit input.As Fig. 1, SB1, SB2, tri-buttons of SB3 can select three touch-switchs to replace, and SB1 is self-locking type, and SB2 and SB3 are for tapping type.Contactor KM1, KM2 and position transducer SQ1, SQ2 respectively get a secondary length and open contact as single-chip microcomputer signal source.

Then, design single chip circuit, described single chip circuit not only wants letter joint also will consider to facilitate programming and operation stability, the problem such as compatible strong.Design circuit is divided into two kinds of methods:

A kind of method is as shown in Figure 2, and each signal source is connected with single-chip microcomputer respectively, then by the method for control port, programmes.But it is many that this method takies resource, increase programming amount, make the speed of computing and the bad stability of output, therefore seldom use in actual applications.

Another kind method is the more single signal source of function and efficacy to be placed on to the head end of SCM peripheral circuit, the more complicated signal source of relevance is placed on to the end of SCM peripheral circuit, directly control single chip computer chip pin is used for single-chip microcomputer provides computing information.As shown in Figure 3, at signal input part FR and SB1, only have " a stopping " task, therefore, by FR and each branch road of SB1 series connection co-controlling, so not only can save single-chip microcomputer pin, but also can simplify programming, can improve single-chip microcomputer arithmetic speed and output stability.And SB2, SB3, KM1, KM2, these elements of SQ1, SQ2 have a plurality of tasks to complete in loop, as break-make, interlocking, self-sustaining, therefore the signal output part of these elements and single-chip microcomputer pin are joined for single-chip microcomputer conveying computing information.

The circuit design of output is as follows:

Input signal and output signal one to one mode are that each input has separately independently output output, and then connect output by certain logical relation.As P1.0 → P0.0, P1.1 → 0.1, P1.2 → P0.2, P1.3 → P0.3, P1.4 → P0.4, P1.5 → P0.5 in Fig. 3.Because SB2 in Fig. 1, KM1 and SQ1, tetra-contacts of KT1 are all the control end of KM1 coil, SB3, KM2 and SQ2, tetra-contacts of KT2 are all the control end of KM2 coil, therefore at the output of Fig. 3, will after P0.1, P0.2, P0.4 parallel connection, by AK1, control KM1 coil, will after P0.1, P0.3, P0.5 parallel connection, by KA2, control KM2 coil.

Wherein, Component List used is as table 1:

Table 1

Step 3: according to electrical schematic diagram, data programming in the secondary circuit representing in described electrical schematic diagram is entered in the singlechip chip with described single chip circuit plate, described data complete logical relation and the function in secondary circuit;

According to Fig. 1 and Fig. 3 comparative analysis, can find out, from the button SB1 end opening of Fig. 1 secondary circuit, separating the logical relation of each contact and coil these four branch roads of suitable for reading and SB1 → KT1, SB2 → KT2 of four branch road SB1 → KM1, SB2 → KM2 coil will complete with the director data of single-chip microcomputer.

It is as follows that the above analysis is write data:

Step 4: single-chip microcomputer described in step 3 is replaced to the auxiliary contact of contact, coil and primary equipment in secondary circuit, obtain the soft loop of secondary.

Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; the protection range being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. in electric secondary circuit, use the method in the soft loop of secondary, it is characterized in that, comprising:

Step 1: obtain single chip circuit figure by electrical schematic diagram;

Step 3: according to described electrical schematic diagram, data programming in the secondary circuit representing in described electrical schematic diagram is entered in the single-chip microcomputer with described single chip circuit plate;

2. method according to claim 1, is characterized in that, step 1 is specially: the logical relation of described single chip circuit is consistent with electrical schematic diagram, determines the circuit of single chip circuit input and output and the element needing, and obtains single chip circuit.

3. method according to claim 2, is characterized in that, in step 1, in described single chip circuit, each signal source is connected with single-chip microcomputer respectively.

4. method according to claim 2, it is characterized in that, in step 1, in described single chip circuit, the single signal source of function and efficacy is placed on to the head end of SCM peripheral circuit, the signal source of relevance complexity is placed on to the end of SCM peripheral circuit, directly control single chip computer chip pin is used for single-chip microcomputer provides computing information.

5. method according to claim 1, is characterized in that, in step 3, described data are arranged in the chip of single-chip microcomputer.

6. method according to claim 1, is characterized in that, in step 4, the contact in described secondary circuit and coil are respectively contact and the coil of button, transducer and the time relay;