PLC circuit function display experiment table

Abstract

The utility model provides a PLC circuit function display experiment table, which comprises an assembly display board used for installing and fixing electrical components, a supporting device and a PLC function display circuit, and is characterized in that the assembly display board is vertically installed on the supporting device, and the assembly between the assembly display board and the supporting device is detachable; and each electric appliance element in the PLC function display circuit is arranged on the assembly display board.

Description

Technical Field

[0001] The utility model relates to teaching aids, in particular to a PLC circuit function display experimental table. Background Art

[0002] In the field of electrical engineering teaching, there is currently no dedicated experimental bench. For example, PLC-related functional circuits are not available. Since there are no teaching aids to display PLC output signals, students can only read books and rely on teachers' explanations, and cannot deeply and effectively understand the relevant functions of PLC. In order to improve the quality of teaching, it is urgent to provide a PLC circuit function display experimental bench. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a PLC circuit function display test bench.

[0004] A PLC circuit function demonstration test bench comprises an assembly display board for mounting and fixing electrical components, a support device, and a PLC function demonstration circuit. The assembly display board is vertically mounted on the support device, and the assembly between the assembly display board and the support device is detachable. The electrical components in the PLC function demonstration circuit are mounted on the assembly display board.

[0005] Furthermore, the PLC circuit function demonstration test bench, wherein: the PLC function demonstration circuit includes an S7-1200 type PLC, a start switch SB0, a stop switch SB1, twelve output signal display indicator lights for displaying output signals, and a card power supply; the positive and negative pins of the power output terminal of the card power supply are respectively connected to the 3L+ pin and 3M pin of the power input terminal of the PLC; the programming data transmission terminal of the PLC is used to connect a programming laptop; the signal input side of the PLC includes 16 input pins, namely: the first signal input pin I 0.0, the second signal input pin I 0.1, ... the sixteenth signal input pin I1.5, the 16 signal input pins I 0.0~I 1.5 are all connected to the positive pole of the PLC built-in 24V power supply, one end of the start switch SB0 is connected to the first signal input pin I 0.0, and the other end of the start switch SB0 is grounded; one end of the stop switch SB1 is connected to the second signal input pin I 0.1, the other end of the stop switch SB1 is grounded; the output side of the PLC includes 12 signal output pins, namely: the first signal output pin Q0.0, the second signal output pin Q0.1, ... the twelfth signal output pin Q1.1, one end of the 12 signal output pins inside the PLC is connected to the positive pole of the PLC's built-in 24V power supply, and the 12 signal output pins inside and outside the PLC are each connected to an output signal display indicator, the first signal output pin Q0.0, the second signal output pin Q0.1, the third signal output pin The output signal display indicators connected to the fourth signal output pin Q0.2, the fourth signal output pin Q0.3, the fifth signal output pin Q0.4, and the sixth signal output pin Q0.5 are all the first color. The output signal display indicators connected to the seventh signal output pin Q0.6, the eighth signal output pin Q0.7, the ninth signal output pin Q0.8, the tenth signal output pin Q0.9, the eleventh signal output pin Q1.0, and the twelfth signal output pin Q1.1 are all the second color. The first color and the second color are clearly distinguishable.

[0006] Furthermore, the PLC circuit function display test bench, wherein: the supporting device includes a table top and supporting legs, a supporting column is provided on each side of the table top, a vertical through groove is provided on each opposite inner side of the two supporting columns, the front faces of the two vertical through grooves are opposite and have the same specifications, and the assembled display board is used to be passed through and fixed in the two vertical through grooves.

[0007] Furthermore, the PLC circuit function display test bench includes two or more assembly display boards, and each assembly display board is sequentially inserted into two vertical through slots and fixed.

[0008] Furthermore, the PLC circuit function display test bench, wherein: the assembly display board and the supporting device are combined into a table, the supporting device includes a storage table drawer, the assembly display board is the table top covering the table, and the assembly display board and the storage table drawer are movably connected; the storage table drawer includes a storage space opening toward the sky.

[0009] Furthermore, the PLC circuit function display experimental table, wherein: a through groove for installing and supporting the assembly of the display board is provided on one side of the storage table drawer, and the inner groove width of the through groove matches the thickness of the supported assembly display board.

[0010] Furthermore, the PLC circuit function display test bench is characterized in that: one side of the storage table drawer is connected to the assembly display board through a loose-leaf, hinge or pneumatic rod.

[0011] Furthermore, the PLC circuit function display test bench, wherein: the assembly display board is provided with a mounting hole matrix, the mounting hole matrix is ​​mounting holes evenly arranged in the horizontal and vertical directions, and is used to install and fix electrical components.

[0012] Furthermore, the PLC circuit function display test bench, wherein: the assembly display board is provided with horizontal or vertical long strip hollow holes.

[0013] The PLC circuit function display experimental platform provided by the utility model is used to install and display PLC related functional circuits. Furthermore, the signal output after PLC programming can be dynamically displayed in the form of indicator lights, which is convenient for students to watch and actually operate programming, effectively carry out PLC related teaching work, reduce teaching costs, and improve students' learning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of programming segment 1;

[0015] Figure 2 This is a schematic diagram of programming segment 2;

[0016] Figure 3 This is a schematic diagram of programming segment 3;

[0017] Figure 4 It is a schematic diagram of programming program segment 4;

[0018] Figure 5 This is a display diagram showing the corresponding indicator light of the PLC circuit corresponding to program segment 4 of the PLC circuit function demonstration test bench of the utility model being started and lit;

[0019] Figure 6 Schematic diagram of programming segment 5;

[0020] Figure 7This is a display diagram showing that the corresponding indicator light of the program segment 5 of the PLC circuit corresponding to the PLC circuit function demonstration experimental platform of the utility model stops going out;

[0021] Figure 8 Schematic diagram of programming program segment 6;

[0022] Figure 9 The wiring diagram of the PLC used in the relevant PLC circuit of the PLC circuit function demonstration experimental platform of this utility model: 7-1200 type 1214C DC / DC / DC PLC;

[0023] Figure 10 This is a schematic diagram of an embodiment of a PLC circuit function demonstration test bench of the present utility model. DETAILED DESCRIPTION

[0024] The utility model provides a PLC circuit function display experimental table, which comprises an assembly display board for installing and fixing electrical components, a supporting device, and a PLC function display circuit. The assembly display board is vertically installed on the supporting device, and the assembly between the assembly display board and the supporting device is detachable; and the electrical components in the PLC function display circuit are installed on the assembly display board.

[0025] The PLC function display circuit includes an S7-1200 type PLC, a start switch SB0, a stop switch SB1, twelve output signal display indicator lights for displaying output signals, and a card power supply; the positive and negative pins of the power output terminal of the card power supply are respectively connected to the 3L+ pin and 3M pin of the power input terminal of the PLC; the programming data transmission terminal of the PLC is used to connect to a programming laptop; the signal input side of the PLC includes 16 input pins, namely: the first signal input pin I 0.0, the second signal input pin I 0.1, ... the sixteenth signal input pin I 1.5, and the 16 signal input pins I 0.0 to I 1.5 are all connected to the positive pole of the PLC's built-in 24V power supply; one end of the start switch SB0 is connected to the first signal input pin I 0.0, and the other end of the start switch SB0 is grounded; one end of the stop switch SB1 is connected to the second signal input pin I 0.1, the other end of the stop switch SB1 is grounded; the output side of the PLC includes 12 signal output pins, namely: the first signal output pin Q0.0, the second signal output pin Q0.1, ... the twelfth signal output pin Q1.1, one end of the 12 signal output pins inside the PLC is connected to the positive pole of the PLC's built-in 24V power supply, and the 12 signal output pins inside and outside the PLC are each connected to an output signal display indicator, the first signal output pin Q0.0, the second signal output pin Q0.1, the third signal output pin The output signal display indicators connected to the fourth signal output pin Q0.2, the fourth signal output pin Q0.3, the fifth signal output pin Q0.4, and the sixth signal output pin Q0.5 are all the same first color. The output signal display indicators connected to the seventh signal output pin Q0.6, the eighth signal output pin Q0.7, the ninth signal output pin Q0.8, the tenth signal output pin Q0.9, the eleventh signal output pin Q1.0, and the twelfth signal output pin Q1.1 are all the same second color. The first color and the second color are clearly distinguishable. Figure 9 Wiring diagram.

[0026] In one embodiment, the supporting device is a table, including a tabletop and supporting legs. A supporting plate is provided on each side of the tabletop, and a connector is provided on the supporting plate. The assembled display board is attached to the two supporting plates and fixed on both sides by the connector.

[0027] In another embodiment, the supporting device is a table, including a table top and supporting legs. A supporting column is provided on each side of the table top, and a vertical through groove is provided on the opposite inner sides of the two supporting columns. The front faces of the two vertical through grooves are opposite and have the same specifications. The assembled display board is used to be passed through and fixed in the two vertical through grooves.

[0028] The assembly display board can be two or more assembly display boards, and each assembly display board is sequentially inserted into two vertical through grooves and fixed.

[0029] In another embodiment, the assembly display board and the supporting device are combined into a table, the supporting device includes a storage table drawer, the assembly display board is a table top covering the table, and the assembly display board and the storage table drawer are movably connected; the storage table drawer includes a storage space that opens toward the sky.

[0030] A through groove for installing and supporting the assembly display board is provided on one side of the storage table drawer, and the inner groove width of the through groove matches the thickness of the supported assembly display board.

[0031] In addition, one side of the storage table drawer and the assembly display board can be connected via a hinge or a pneumatic rod.

[0032] The assembly display board is provided with a mounting hole matrix, which is mounting holes evenly arranged in the horizontal and vertical directions and is used for mounting and fixing electrical components.

[0033] In another embodiment, the assembly display board is provided with horizontal or vertical long strip hollow holes. Figure 10 Schematic diagram of the assembly display board with long hollow holes.

[0034] Program segment network 1: Press the start button SB0, through pin I0.0, M10.0 is connected, timer T37 starts timing and oscillating, that is, the timer is connected once per second, forming a repeated connection (second pulse); the purpose is to Figure 1 The counter is prepared, and the counter counts once it is turned on; the counter uses the status bit of timer T37;

[0035] Program segment 2: The counter is controlled by the second pulse and starts to count up. The counter value MW100 is the real-time display of the count. When MW100 is equal to 0 (the subtraction count is 0 when it is not subtracted), the normally closed point of M10.1 is connected, the counter is counting up, and the indicator lights light up from the middle to both sides in sequence; when MW100 is equal to 5, M10.1 is connected, the normally open point of M10.1 is connected, and the subtraction count starts. When a number is reduced, a light goes out, and it goes out from both sides to the middle, and the cycle continues; the counter ADD terminal is connected for counting up, and the SUB terminal is connected for counting down (see program terminal network 3), see Figure 2 .

[0036] Program segment 3: The following is a counter composed of addition and subtraction instructions. M0.5 is a second pulse. Here, a rising edge must be added. It is connected once in 1 second and counted once. To prevent the count from exceeding, conditional restrictions are placed before the increase and decrease counts respectively; see Figure 3 ;

[0037] Program segment 4: To prevent mutual interference during switching, a switch increase and decrease closing point is added to limit the switching. When the counter MW100 value is equal to 1, the middle Q0.4 and Q0.5 are lit first, and then light up from the middle to both sides. When it is equal to 2, Q0.3 and Q0.6 are lit. When it is equal to 3, Q0.2 and Q0.7 are lit. When it is equal to 4, Q0.1 and Q1.0 are lit. When the value is equal to 5, Q0.0 and Q1.1 are lit. At this time, all 10 indicator lights are lit and remain on; see Figure 4 Schematic diagram of programming program segment 4 shown; Figure 5 The figure shows the corresponding indicator light of the PLC circuit corresponding to program segment 4 starting to light up.

[0038] Program terminal 5: Extinguishing mode: To prevent mutual interference during switching, a switch increase and decrease opening point is added to limit the switching. When the counter value MW100 is equal to 5, M10.1 is turned on, the M10.1 normally open point is turned on, and the countdown starts. When one number is reduced, one light is turned off, and the lights are turned off from both sides to the middle, and the cycle continues. The following is the countdown program. When MW100 is equal to 4, Q0.0 and Q1.1 are turned off first, and then from both sides to the middle; when MW100 is equal to 3, Q0.1 and Q1.0 are turned off; when it is equal to 2, Q0.2 and Q0.7 are turned off; when it is equal to 1, Q0.3 and Q0.6 are turned off; when it is equal to 0, Q0.4 and Q0.5 are turned off; when MW100 is equal to 0 (the countdown is 0 when it is reduced to zero); Figure 6 Schematic diagram of programming segment 5; Figure 7 This is a diagram showing that the corresponding indicator light of the PLC circuit corresponding to program segment 5 stops going out.

[0039] Program segment 6: After pressing I0.1 and disconnecting the start point, use the falling edge to clear MW100 and reset the entire program from Q0.0 to Q1.1 to stop. Figure 8 This is a schematic diagram of programming segment 6.

[0040] Figure 9 The wiring diagram of the PLC used in the PLC circuit: 7-1200 type 1214C DC / DC / DC PLC.

[0041] PLC Description: Using Siemens S7-1200 model: 1214C DC / DC / DC transistor output type, 1. The lower port is the output, the card power supply is 3L+3M, the output signal Q terminal output is 24V, and the indicator lights are all 24V power supply. Here, only the indicator lights are not using relays. When there is a signal output at the PLC output terminal Q, only 24V+ is provided. To make the indicator light up, a 24V is required to form a loop. This is an external connection mode. The PLC does not provide 24V negative internally. 2. The upper port is the input terminal I 0.0 pin connected to the button SB0 for starting, pin I 0.1 connected to the button SB1 for stopping, and 1M is the common terminal connected to the 24V negative to form a loop with the input 24V+.

[0042] The following is a counter composed of addition and subtraction instructions. M0.5 is a second pulse. The rising edge must be added here. It is connected once in 1 second and counted once to prevent the count from exceeding the limit. Conditional restrictions are placed before the increase and decrease counts respectively; and the value of the counter is used as the control condition to skip the cycle of lighting the indicator light with the instruction.

[0043] When counting up, the indicator lights start to light up from the middle pins Q0.4 and Q0.5 to both sides, and when counting down, they go out from both sides to the middle.

[0044] Compared with the previous ones, this technical solution is simpler in control because it uses set and reset instructions, counter and timer instructions, and can help students have broader ideas in programming.

[0045] Press the start button SB0, and the indicator lights corresponding to the middle pins Q0.4 and Q0.5 will light up first, and then one pair will light up from the middle to both sides every 1 second. After all 12 indicator lights are lit, one pair will go out every 1 second from Q0.0 and Q1.1 on both sides to the middle, until Q0.4 and Q0.5 in the middle are off, and one cycle is complete.

[0046] Press the stop button SB1 to stop the entire program;

[0047] This PLC functional experiment platform is designed based on the computational and control capabilities of the PLC processor CPU. By improving conventional control and streamlining logical control, it achieves fast and stable equipment operation, embodying automation and improving students' programming skills. It allows them to have a broader perspective, simplify complex content, and visualize abstract content. This reduces teaching costs and mitigates potential safety risks in terms of teaching organization.

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A PLC circuit function demonstration test bench, characterized by: It includes an assembly display board for mounting and fixing electrical components, a support device, and a PLC function display circuit. The assembly display board is vertically mounted on the support device, and the assembly between the assembly display board and the support device is detachable. The electrical components in the PLC function display circuit are mounted on the assembly display board. The PLC function display circuit includes an S7-1200 type PLC, a start switch, a stop switch, twelve output signal display indicator lights for displaying output signals, and a card power supply; the positive and negative pins of the power output terminal of the card power supply are respectively connected to the 3L+ pin and 3M pin of the power input terminal of the PLC; the programming data transmission terminal of the PLC is used to connect a programming laptop; the signal input side of the PLC includes 16 input pins, namely: the first signal input pin, the second signal input pin, ... the sixteenth signal input pin, and all 16 signal input pins are connected to the positive pole of the built-in 24V power supply of the PLC, one end of the start switch is connected to the first signal input pin, and the other end of the start switch is grounded; one end of the stop switch is connected to the second signal input pin, and the other end of the stop switch is grounded; the output side of the PLC includes 12 signal input pins. The output pins are: the first signal output pin, the second signal output pin, ... the twelfth signal output pin. One end of the 12 signal output pins inside the PLC is connected to the positive pole of the PLC's built-in 24V power supply. The pins inside and outside the PLC are each connected to an output signal display indicator. The output signal display indicators connected to the first signal output pin, the second signal output pin, the third signal output pin, the fourth signal output pin, the fifth signal output pin, and the sixth signal output pin are all of the first color. The output signal display indicators connected to the seventh signal output pin, the eighth signal output pin, the ninth signal output pin, the tenth signal output pin, the eleventh signal output pin, and the twelfth signal output pin are all of the second color. The first color and the second color are clearly distinguishable.

2. The PLC circuit function demonstration test bench according to claim 1, characterized in that: The supporting device includes a table top and supporting legs. A supporting column is provided on each side of the table top. A vertical through groove is provided on the opposite inner sides of the two supporting columns. The front faces of the two vertical through grooves are opposite and have the same specifications. The assembled display board is used to be passed through and fixed in the two vertical through grooves.

3. The PLC circuit function demonstration test bench according to claim 2, characterized in that: It comprises two or more assembly display boards, and each assembly display board is sequentially inserted into two vertical through grooves and fixed.

4. The PLC circuit function demonstration test bench according to claim 1, characterized in that: The assembly display board and the supporting device are combined into a table, the supporting device includes a storage table drawer, the assembly display board is a tabletop covering the table, and the assembly display board and the storage table drawer are movably connected; the storage table drawer includes a storage space opening toward the sky.

5. The PLC circuit function demonstration test bench according to claim 4, characterized in that: A through groove for installing and supporting the assembly display board is provided on one side of the storage table drawer, and the inner groove width of the through groove matches the thickness of the supported assembly display board.

6. The PLC circuit function demonstration test bench according to claim 4, characterized in that: One side of the storage table drawer is connected to the assembly display board through a movable hinge or a hinge or a pneumatic rod.

7. The PLC circuit function demonstration test bench according to claim 1, characterized in that: The assembly display board is provided with a mounting hole matrix, which is mounting holes evenly arranged in the horizontal and vertical directions and is used for mounting and fixing electrical components.

8. The PLC circuit function demonstration test bench according to claim 1, characterized in that: The assembly display board is provided with horizontal or vertical long strip hollow holes.

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