CN201576370U - PLC intelligent training device - Google Patents

Abstract

The utility model relates to teaching training equipment. In order to fully meet the requirements of teaching training courses of a programmable logic controller (called PLC for short), the utility model provides a PLC intelligent training device which comprises a dynamic display screen, a selecting key, a PLC input point setting switch and an electrical control part, wherein the electrical control part comprises a central control chip; the input bus and the output bus of the central control chip are provided with a display screen bus port, an item selecting port, a PLC output state acquiring port, a PLC input point connecting state selecting port and a PLC input point state output port. In the technical scheme, the simulation of an industrial site is displayed and controlled by a cartoon mode, the PLC programmable software formulated by students is downloaded into the central control chip so as to select proper training items, thus training the PLC program design capability and the system debugging capability of the students; the training items are not limited and can cover various loads commonly used by industries; and the PLC intelligent training device is extremely beneficial to the training of comprehensive capabilities of the students.

Description

PLC intelligence actual training device

Technical field

The utility model relates to practice teaching equipment, in particular realize the electronic instruction equipment of multiple-task control operation with Programmable Logic Controller, it can be widely used in the Programmable Logic Controller teaching real training equipment of electric class, electrical category, numerical control class, mechanical automation class Major.

Background technology

Programmable Logic Controller, be called for short PLC, in industrial control field, occupy extremely important position, when offering the PLC principle or using course, how to allow the student be that each engineering and polytechnic universities, Higher Vocational College and middle duty school implement the problem that the PLC teaching needs most solution learning on the basis of knowwhy the real good PLC of practice well.

Should allow the student touch many real control objects in the PLC teaching, but utilization rate is lower, be subjected to the restriction of fund input again is impossible make or buy various single controlled devices, therefore limit this type of practice-training teaching and built process, also become the big obstacle that graduate's specialized capability improves.For solving this realistic problem, multiple real training case or practical traning platform product have appearred on the market, the required investment of these teaching equipments is also very high, and can only arrange real training object few in number in the equipment, usually only be provided with 5～8, the real training number of entry is few, the demand that be difficult to satisfy course teaching, edifies the student; Moreover, there is more mechanical movable part in the real training object of real training case or practical traning platform, in the face of a large amount of students, damage of components is so that malfunctioning phenomenon often occurs in the real training, and maintenance, maintenance workload are big, have also influenced teaching process.Though all at exploitation and the curriculum reform actively pushed forward based on course of work guiding course, the problems referred to above then constitute the bottleneck of educational reform in each universities and colleges.

Summary of the invention

Goal of the invention of the present utility model is fully to satisfy PLC practice teaching curriculum requirements and provides a kind of and have the real training project of q.s and avoid mechanical movable part setting, PLC intelligence actual training device that real training controllable operating ability is strong.The technical scheme of the PLC intelligence actual training device that the utility model provides, its major technique content is: a kind of PLC intelligence actual training device, it includes dynamic display screen, options button, the PLC input point is provided with switch and electric control system, its electric control system includes central control chip, the input of this central authorities' control chip, output bus is divided and is provided with the display screen bus port that is used to connect dynamic display screen, be provided with the project choice port that is used to connect each options button, be provided with the PLC output state that is connected with PLC output point port and gather port, be provided with PLC input point connection status and select port, be provided with PLC input point state output end mouth, wherein PLC input point connection status selects each end line driving of port to select circuit to select the corresponding end line or the corresponding PLC input point of connection PLC input point state output end mouth that switch is set.

The PLC intelligence actual training device technical scheme that the utility model provides, by the demonstration control of the software algorithm program in the central control chip with the virtual industry spot of animation mode, the student is downloaded in the PLC by the PLC programming software of selecting appropriate real training project to be worked out voluntarily, central authorities' control chip begins by PLC input point state output end mouth according to the PLC programming software of student's establishment, PLC input point connection status selects port that each input point of PLC is carried out program setting, the trapezoid figure program that PLC writes according to the student is controlled the PLC output state of central control chip and is gathered each output point state of port detection PLC, one drives central control chip operation real training animation, and whether another determining program is worked out and moved correct.The technical program mainly organically combines with real training project animation virtual mode and the operation of PLC program detection, make the student in PLC curricula project, obtain taking exercise with practical operation control on all four programming of project and operation, and the technical program adopts the mode of electronic virtual emulation that nearly tens real training selectable items can be set, therefore can allow the student that the condition and the chance of more real training exercise are arranged, this virtual mode need not to be provided with mechanical movable part, it is low that it has cost, easy to operate and for ease of maintenaince, safeguard, plurality of advantages such as this apparatus system of remote upgrade program are to adapt to the modern job education theory, a kind of new teaching equipment that cooperates modern job education and instruction method.By PLC intelligence actual training device of the present utility model student's PLC programming capability, system debug ability are trained up, its real training project is unrestricted, can contain industry various loads commonly used, and is highly beneficial to the students'comprehensive ability training.

Description of drawings

Fig. 1 and Fig. 2 are respectively outward appearance front elevation and the rear views that this PLC intelligence actual training device is implemented structure

Fig. 3 is the electrical schematic diagram of the electric control system of this PLC intelligence actual training device

Fig. 4 is the simulation hardware wiring diagram of real training example 1.

Embodiment

The disclosed PLC intelligence of the utility model actual training device, as depicted in figs. 1 and 2, it includes dynamic display screen 1, options button 3, PLC input point switch S B0-SB7 and electric control system is set, also include power switch 6, alarm 7 and power safety pipe 8, also be provided with on this device to be connected and be mainly used in communication interface 10 and the upgrade interface 11 of downloading the program that designs with subscriber computer, the PLC programming software is downloaded to this PLC intelligence actual training device by this communication interface 10 and carries out the real training operation, support software remote online upgrading simultaneously.In its electric control system with single-chip microcomputer, AVR chip or ARM chip are as central control chip, the input of central authorities' control chip, output bus is divided a plurality of function ports by function, be provided with the display screen bus port, the project choice port, the PLC output state is gathered port, PLC input point connection status is selected port and PLC input point state output end mouth, in the present embodiment by microcontroller bus P1.6, P1.7, P3.2, P3.3, P3.4, P3.5, P3.6, P3.7, P2.5, P2.6, P2.7 connects dynamic display screen as the display screen bus port, shows the emulation animation by these bus transfer corresponding signals through dynamic display screen, show displaying contents such as real training option; The project choice port is connected with each options button, comprising function key Fn is arranged, increase key I NC, reduce key DEC and carriage return/reset key ENT/RST, respectively with the bus P0.0 of project choice port, P0.1, P0.2, P0.3 connects PLC output state collection port and is connected with PLC output point port Y0-Y5, in order to utilize the single-chip microcomputer input as much as possible, the output bus resource, in the present embodiment, single-chip microcomputer has been opened up three-bus P1.0, P1.1 and P1.2 through 8 bit parallels import/serial Output Shift Register IC2 expands to six road signal wires, be connected with PLC output point Y0-Y5 respectively, the PLC output state detected by single-chip microcomputer; PLC input point connection status selects port also to adopt the bus expansion structure, open up three-bus P4.1 by single-chip microcomputer, P4.4 and P4.6 through 8 bit parallels import/serial Output Shift Register CD4094 and chip for driving ULN2803 expand to eight road drive signal lines, drive respectively and connect eight double-contact relays formation driving selection circuit, make first group of contact of each double-contact relay be used for the corresponding connection of PLC input point state output end mouth bus and each input point end line X0-X7 of PLC, second group of contact is used for the corresponding connection PLC input point state output end mouth that the PLC input point is provided with each input point end line X0-X7 of switch S B0-SB7 and PLC and also adopts the bus expansion structure, single-chip microcomputer is opened up three-bus P1.3, P1.4 and P1.5 through 8 bit parallels import/serial Output Shift Register CD4094 and chip for driving ULN2803 expand to eight road drive signal lines, drive each the input point end line X0-X7 that is connected in PLC through first group of contact of relay respectively.In this structure is provided with, each input point X0-X7 of PLC adopts Single Chip Microcomputer (SCM) program setting syndeton and PLC input point that two kinds of selection setting meanss of switch S B0-SB7 external setting-up are set, set by Single Chip Microcomputer (SCM) program with the reference mark of realizing dynamic display frame, PLC master makes push-button switch then by the PLC input point switch is set and manually sets.In addition, for reducing the PLC input point as much as possible number of switches is set, as shown in Figure 3, it is as normally opened contact that its PLC input point is provided with switch S B0-SB7 or normally closed contact is to be set by selector switch SK0-SK7, each switch S B0-SB7 that the PLC input point is provided with switch is made of a normally opened contact and normally closed contact series connection, each node of connecting selects second group of contact of each relay of circuit to link respectively with above-mentioned driving respectively, that switch S B0-SB7 is set is in parallel with each for its each selector switch SK0-SK7, the intermediate point of each selector switch SK0-SK7 is as setting potential point, when going up, dials a certain selector switch SK0-SK7, then switch S B0-SB7 is set is normally opened contact to Dui Ying input point, is normally closed contact otherwise then corresponding input point is provided with switch S B0-SB7.

This PLC intelligence actual training device can make the product of casing shape, and as shown in Figure 1, its volume is small and exquisite, and is provided with portable handle 2; Box back surface is provided with and is used to hang or leg 12 that angle supports.

To be the animation simulation real training process that example illustrates this PLC intelligence actual training device with " back and forth control " below, wherein the requirement of this real training task has:

Original state, dolly is pressed and is just changeed start button SB0 in left limit switch S Q2 position, and Y0 gets, motor is just changeing dolly and is walking to the right, when arriving right limit switch S Q3 position, Y0 dead electricity, Y1 get electric, and motor counter-rotating dolly is walked left, Y1 dead electricity Y0 gets after running into left limit switch S Q2, dolly is walked to the right, and so forth, stops when pressing scram button SB2;

If dolly left and right spacing between during the arbitrfary point, allowing to press is just changeing start button SB0 or counter-rotating start button SB1 starts just turning right row or counter-rotating left lateral.But when dolly reaches right limit switch S Q3 place, only allow to press counter-rotating start button SB 1 and start the counter-rotating left lateral; Vice versa;

If left limit switch S Q2 or right limit switch S Q3 lost efficacy, dolly will surmount left and right spacing point and continue operation, when running into limit on the left bit switch SQ1 or limit on the right-right-hand limit bit switch SQ4, dolly be stopped, and output alarm signal.When overheating protection appears in motor, stop dolly, and output alarm signal.

Requirement has electrical interlocks, mechanical interlocked function and out-of-limit defencive function.

This real training project I/O allocation table:

Functions of functional keys table in this real training:

This PLC intelligence actual training device illustrates for the simulation process of above-mentioned real training task " back and forth control ":

A. the first step, switch S B0, SB1 that the PLC input point is provided with among the switch S B0-SB7 are set to normally opened contact, soon selector switch SK0, SK1 upwards dial to Chang Kaixuan and select the position, and switch S B2 is set to normally closed contact, are about to selector switch SK2 and dial to normally closed selection position downwards.Programmed instruction is selected port P4.1 by the PLC input point connection status of single-chip microcomputer, P4.4, P4.6 sends, drive relay J 0 through CD4094 and ULN2803, J1, J2 starts, select the PLC input point to be provided with and in the switch switch S B0 is set, SB1, SB2, three on off states are connected to PLC input point X0, X1, X2, drive relay J 3 simultaneously, J4, J5, J6, the J7 outage, with PLC input point X3, X4, X5, X6, X7 and PLC input point state output end mouth P1.3, P1.4, the IN3 of P1.5 external drive ~ IN7 is communicated with, be set at SQ1 respectively by Single Chip Microcomputer (SCM) program, SQ2, SQ3, SQ4, the FR signal, and specify its contact attribute by real training project I/O allocation table automatically;

In second step, select " back and forth operation " real training project by the button of options button 3.The steps include: to press function key Fn button, enter the project choice state, press key INC or key DEC, when picture is shown as " back and forth control ", press the ENT button, can enter the real training state;

In the 3rd step, adopt PLC trapezoidal pattern programming software that real training is required to programme, and download to and monitor debugging among the PLC;

In the training simulation debug process, setting options button Fn respectively is that simulating motor electrothermal relay temperature protection signal, key INC are used to simulate left limit switch S Q2 disablement signal, key DEC is used to simulate right limit switch S Q3 disablement signal;

B. call in the initial picture of " back and forth control " again, stop flicker, dolly is put height by Single Chip Microcomputer (SCM) program control with IN4 in left limit switch S Q2 position at this moment, promptly connects PLC input point X4, now is positioned at the left limit position of the switch with the reaction dolly;

The dynamic simulation process is as follows:

A. move after will being input to the PLC chip internal of plug-in mounting by the program of ladder diagram establishment, central authorities' control chip detects the PLC output state in real time through PLC output state collection port P1.0, P1.1, P1.2, and compare judgement, determine the state of various piece in the emulated interface: get when electric when detecting output point Y0, make after the Single Chip Microcomputer (SCM) program computing and show that dolly moves right in the animation, get when electric when detecting output point Y1, make after the Single Chip Microcomputer (SCM) program computing to show that dolly is moved to the left in the animation; If detect output point Y0, Y1 simultaneously electric, promptly the trapezoid figure program write of user occurs when wrong, then central control chip instruction dolly stops at current location, and in picture demonstration informations such as " ERROR ".

B. the implementation method of electrothermal relay FR overheating protection and spacing inefficacy in the simulating reality: when central control chip program detects PLC output point state in real time; whether also will detect each options button state is pressed; be pressed if detect function key Fn; then central control chip programmed instruction set IN7, make PLC input point X7 effective, promptly produce an electrothermal relay heat alarm.If detect key INC or key DEC by by, to produce limit switch SQ2 or SQ3 disablement signal so, be that trolley travelling is to left limit switch S Q2 position or during right limit switch S Q3 position, central authorities' control chip is not exported and is arrived spacing signal, PLC is detected less than limit signal, this moment, dolly can directly run to a left side or limit on the right-right-hand limit position, thereby simulate out-of-limit state, this moment is if trapezoid figure program is correct, will make output point Y0, the Y1 dead electricity, and output alarm signal detects output point Y2 when effective for output point Y2, central control chip, export by a port bus P0.7 by central control chip program, by alarm 7 sounding alarms.

C. removed by carriage return/reset key ENT/RST and lost efficacy or superheat state, make the real training picture recovery to initial display frame, this process is to remove by maintenance of equipment to lose efficacy or superheat state in reality certainly.

Claims (2)

1. PLC intelligence actual training device, it is characterized in that it includes dynamic display screen, options button, the PLC input point is provided with switch and electric control system, its electric control system includes central control chip, the input of this central authorities' control chip, output bus is divided and is provided with the display screen bus port that is used to connect dynamic display screen, be provided with the project choice port that is used to connect each options button, be provided with the PLC output state that is connected with PLC output point port and gather port, be provided with PLC input point connection status and select port, be provided with PLC input point state output end mouth, wherein PLC input point connection status selects each end line driving of port to select circuit to select the corresponding end line or the corresponding PLC input point of connection PLC input point state output end mouth that switch is set.

2. PLC intelligence actual training device according to claim 1, it is characterized in that the PLC input point is provided with each switch of switch (SB0-SB7) by a normally opened contact and normally closed contact series connection formation, each node of connecting selects contact to link with each relay one of drive selecting circuit respectively, and that switch (SB0-SB7) is set is in parallel with each for its each selector switch (SK0-SK7).

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