Test system for digital quantity IO (input / output) point of programmable logic controller

Abstract

The embodiment of the utility model provides a system for testing digital IO (input / output) points of a programmable logic controller, which relates to the technical field of programmable logic controller testing and comprises a shell and a fixed plate, an inner cavity of the shell is fixedly connected with the fixed plate, the fixed plate is movably connected with a plurality of movable shells, and two movable plates are movably connected in each movable shell. The top face of the side, away from the movable shell, of each movable plate is fixedly connected with a connecting end. By pushing the bottom plate, the bottom plate drives the ejector rod and the spring to move, the spring is stretched, the ejector rod is separated from the fixed plate and the movable plate, positioning of the movable shell and the movable plate is relieved, the movable shell can be pushed on the fixed plate according to the position of the wiring port, and the movable shell is adjusted to a proper position. And the movable plate is adjusted in the movable shell, and the distance and the relative position between the connecting ends are changed, so that the test system can conveniently perform efficient test operation on the programmable logic controller.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of programmable logic controller testing, and in particular to a testing system for digital IO points of a programmable logic controller. Background Art

[0002] During mass production of programmable logic controllers (PLCs), due to limitations in electronic circuit manufacturing processes, some PLC products inevitably experience short circuits or poor solder joints. This manifests itself in PLC IO functionality, where the PLC system fails to detect when input ports are connected or disconnected, and the PLC system's output status fails to correctly transmit to the corresponding output ports. Therefore, mass production of PLCs requires testing every digital input and output point to ensure they are properly connected and disconnected.

[0003] Prior art testing for the correct switching of each digital input and output point on a PLC involves pairing the PLC's outputs with its inputs one by one, then programming the output image with a numerical code. The code is then read from the input image. If the values ​​match, there's no abnormality; if they differ, there's an abnormality. This method allows for simple and efficient testing of digital IO points on programmable logic controllers.

[0004] However, there is currently a lack of an easy-to-use test system during the testing process. Each time a programmable logic controller digital IO point is tested, repeated wiring operations are required. Due to the number of ports and different models of programmable logic controllers, the wiring operations take a lot of time to operate, greatly reducing the testing efficiency of the programmable logic controller digital IO points. Based on the above reasons, the utility model proposes a test system for the digital IO points of a programmable logic controller. Utility Model Content

[0005] (1) Technical problems to be solved

[0006] In view of the above problems, an embodiment of the present application provides a testing system for digital IO points of a programmable logic controller to solve the problem of inconvenient testing operations.

[0007] (2) Technical solution

[0008] An embodiment of the present application provides a testing system for digital IO points of a programmable logic controller, including a shell, a fixed plate fixedly connected to the inner cavity of the shell, a plurality of movable shells movably connected to the fixed plate, two movable plates movably connected in each movable shell, a connection terminal fixedly connected to the top surface of the movable plate away from the movable shell, two connection terminals at the same movable shell are connected by a wire, a position adjustment component is provided on the bottom surface of the movable shell, and positioning components are provided on the four side walls of the shell.

[0009] Furthermore, the position adjustment assembly includes a base plate, and a base plate is provided on the lower side of each movable shell. Three push rods are fixedly connected to the top surface of the base plate. The push rods pass through the movable shell and are respectively tightened on the fixed plate and the movable plate. Springs are provided on the push rods, one end of the spring is fixedly connected to the base plate, and the other end of the spring is fixedly connected to the bottom surface of the movable shell.

[0010] Furthermore, side panels are fixedly connected to the side walls of the bottom plate, and two side panels are symmetrically arranged.

[0011] Furthermore, the top ends of the push rods are fixedly connected with anti-skid pads, which are respectively tightly arranged against the fixed plate and the movable plate.

[0012] Furthermore, the positioning assembly includes a threaded rod, which is movably connected to the outer shell, and a rotating wheel is fixedly connected to the end of the threaded rod away from the outer shell. A flat plate is threadedly connected to the side wall of the threaded rod, and two fixing rods are fixedly connected to the flat plate. The end of the fixing rod away from the flat plate passes through the outer shell and is fixedly connected to a splint, and the fixing rod is movably connected to the outer shell.

[0013] Furthermore, the top surface of the splint is tilted toward the side away from the center of the inner cavity of the shell, and the length of the front and rear splints is greater than the length of the left and right splints.

[0014] Furthermore, a slide plate is fixedly connected to the inner side wall of the movable shell, a movable groove is opened on the side wall of the movable plate, the slide plate is inserted into the movable groove and the slide plate and the movable groove are movably connected.

[0015] Furthermore, a power supply is fixedly connected to the right outer wall of the shell, and the two rightmost connection terminals are connected to the power supply through wires.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] Through the above scheme, by pushing the bottom plate, the bottom plate drives the top rod and the spring to move, the spring is stretched and the top rod is separated from the fixed plate and the movable plate, and the positioning of the movable shell and the movable plate is released, and the movable shell can be pushed on the fixed plate according to the position of the wiring port, and the movable shell is adjusted to a suitable position, and the movable plate is adjusted in the movable shell to change the spacing and relative position between the connection ends, so as to facilitate the test system to perform efficient testing operations on the programmable logic controller; by rotating the rotating wheel, the rotating wheel drives the threaded rod to rotate, the threaded rod engages the flat plate to move, and the flat plate drives the clamping plate to move through the fixed rod, and moves the clamping plate to the specified position in the inner cavity of the shell, ensuring that the four clamping plates can limit the four side walls of the programmable logic controller, so that the test system can position programmable logic controllers of different shapes and improve test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this application;

[0021] Figure 2 This is a schematic diagram of the front three-dimensional structure of the interior of the housing of this application;

[0022] Figure 3 This is a schematic diagram of the side three-dimensional structure of the interior of the housing of this application;

[0023] Figure 4 A schematic diagram of the three-dimensional structure of the movable shell of the present application;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the position adjustment component of the present application;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the positioning component of this application.

[0026] Description of reference numerals:

[0027] 1. Outer shell; 2. Fixed plate; 3. Movable shell; 4. Movable plate; 5. Connecting terminal; 6. Wire; 7. Position adjustment assembly; 8. Positioning assembly; 9. Bottom plate; 10. Push rod; 11. Spring; 12. Side plate; 13. Anti-slip pad; 14. Threaded rod; 15. Rotating wheel; 16. Flat plate; 17. Fixed rod; 18. Clamping plate; 19. Slide plate; 20. Movable slot; 21. Power supply. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] like Figure 1-6 As shown, an embodiment of the present application provides a test system for digital IO points of a programmable logic controller, including a housing 1, a fixed plate 2 is fixedly connected to the inner cavity of the housing 1, and a plurality of movable housings 3 are movably connected to the fixed plate 2. Two movable plates 4 are movably connected to each movable housing 3, and a connection terminal 5 is fixedly connected to the top surface of the movable plate 4 away from the movable housing 3. The two connection terminals 5 on the same movable housing 3 are connected by a wire 6. A power supply 21 is fixedly connected to the right outer wall of the housing 1, and the two rightmost connection terminals 5 are connected to the power supply 21 through the wire 6;

[0030] In the technical solution of this embodiment, the connection operation between the two connection terminals 5 can be achieved through the wire 6, and the power supply 21 can be used to power the programmable logic controller, which facilitates the use of the test system;

[0031] Furthermore, a slide plate 19 is fixedly connected to the inner side wall of the movable shell 3, and a movable groove 20 is opened on the side wall of the movable plate 4. The slide plate 19 is inserted into the movable groove 20 and the slide plate 19 and the movable groove 20 are movably connected, so that the movable plate 4 can achieve stable movement in the movable shell 3;

[0032] A position adjustment assembly 7 is provided on the bottom surface of the movable shell 3. The position adjustment assembly 7 includes a bottom plate 9. A bottom plate 9 is provided on the lower side of each movable shell 3. Three push rods 10 are fixedly connected to the top surface of the bottom plate 9. The push rods 10 pass through the movable shell 3 and are respectively tightened on the fixed plate 2 and the movable plate 4. A spring 11 is sleeved on the push rods 10. One end of the spring 11 is fixedly connected to the bottom plate 9, and the other end of the spring 11 is fixedly connected to the bottom surface of the movable shell 3.

[0033] In the technical solution of this embodiment, by pushing the bottom plate 9, the bottom plate 9 drives the push rod 10 and the spring 11 to move, the spring 11 is stretched and the push rod 10 is separated from the fixed plate 2 and the movable plate 4, thereby releasing the positioning of the movable shell 3 and the movable plate 4. The movable shell 3 can be pushed on the fixed plate 2 according to the position of the wiring port, and the movable shell 3 can be adjusted to a suitable position. The movable plate 4 is adjusted within the movable shell 3 to change the spacing and relative positions between the connection terminals 5, thereby facilitating the efficient testing operation of the programmable logic controller by the test system.

[0034] Furthermore, a side plate 12 is fixedly connected to the side wall of the bottom plate 9, and two side plates 12 are symmetrically provided, which facilitates the pushing operation of the bottom plate 9 and is easy to use;

[0035] Furthermore, the top ends of the push rods 10 are fixedly connected with anti-skid pads 13, which are respectively tightly arranged with the fixed plate 2 and the movable plate 4, and can effectively increase the friction between the fixed plate 2 and the movable plate 4, thereby improving the positioning reliability of the movable shell 3 and the movable plate 4;

[0036] A positioning assembly 8 is provided on each of the four side walls of the housing 1. The positioning assembly 8 includes a threaded rod 14, which is movably connected to the housing 1. The end of the threaded rod 14 away from the housing 1 is fixedly connected to a rotating wheel 15. A flat plate 16 is threadedly connected to the side wall of the threaded rod 14. Two fixing rods 17 are fixedly connected to the flat plate 16. The end of the fixing rod 17 away from the flat plate 16 passes through the housing 1 and is fixedly connected to a clamping plate 18. The fixing rod 17 is movably connected to the housing 1.

[0037] In the technical solution of this embodiment, the rotating wheel 15 rotates, the rotating wheel 15 drives the threaded rod 14 to rotate, the threaded rod 14 engages the flat plate 16 to move, and the flat plate 16 drives the clamping plate 18 to move through the fixed rod 17, and moves the clamping plate 18 to the specified position of the inner cavity of the shell 1, ensuring that the four clamping plates 18 can limit the four side walls of the programmable logic controller, so that the test system can position programmable logic controllers of different shapes, thereby improving test efficiency;

[0038] Furthermore, the top surface of the splint 18 is tilted toward the side away from the center of the inner cavity of the shell 1, and the length of the front and rear splints 18 is greater than the length of the left and right splints 18, which facilitates the placement operation of the programmable logic controller and is convenient for testing.

[0039] Working principle: Before using this test system, first adjust the position of the connection terminal 5 according to the position of the wiring port of the programmable logic controller, push the side plate 12, the side plate 12 drives the bottom plate 9 to move, the bottom plate 9 drives the push rod 10 and the spring 11 to move, the spring 11 is stretched and the push rod 10 is disengaged from the fixed plate 2 and the movable plate 4, and the positioning of the movable shell 3 and the movable plate 4 is released, and the movable shell 3 can be pushed on the fixed plate 2 according to the position of the wiring port, and the movable shell 3 is adjusted to a suitable position, and the movable plate 4 is adjusted in the movable shell 3 to change the spacing and relative position between the connection terminals 5. When the position of the connection terminal 5 meets the needs, loosen the side plate 12, and under the action of the spring 11, the push rod 10 is tightened on the fixed plate 2 and the movable plate 4 to complete the adjustment operation of the connection terminal 5. Repeat the above operation continuously to adjust all the connection terminals 5 to the specified position. The wheel 15 is then rotated according to the shape of the programmable logic controller, and the wheel 15 drives the threaded rod 14 to rotate, and the threaded rod 14 engages the flat plate 16 to move, and the flat plate 16 drives the clamping plate 18 to move through the fixing rod 17, and moves the clamping plate 18 to the specified position of the inner cavity of the shell 1, ensuring that the four clamping plates 18 can limit the four side walls of the programmable logic controller. When testing the digital IO points of the programmable logic controller, this test system places the programmable logic controller between the four clamping plates 18, limits the programmable logic controller through the clamping plates 18, and inserts the connecting end 5 into the connection port of the programmable logic controller to complete the rapid docking operation of the line, and then turns on the power 21 and performs the numerical input operation of each connection port through the program, so as to realize the rapid test operation of the digital IO points of the programmable logic controller and improve the test efficiency of the system.

[0040] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0041] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A test system for digital IO points of a programmable logic controller, characterized in that: The invention comprises a shell (1), wherein the inner cavity of the shell (1) is fixedly connected to a fixed plate (2), the fixed plate (2) is movably connected to a plurality of movable shells (3), each of the movable shells (3) is movably connected to two movable plates (4), the top surface of the movable plate (4) away from the movable shell (3) is fixedly connected to a connection terminal (5), the two connection terminals (5) at the same movable shell (3) are connected via a wire (6), a position adjustment component (7) is provided on the bottom surface of the movable shell (3), and positioning components (8) are provided on the four side walls of the shell (1).

2. A test system for digital IO points of a programmable logic controller according to claim 1, characterized in that: The position adjustment assembly (7) includes a base plate (9), and a base plate (9) is provided on the lower side of each movable shell (3). Three push rods (10) are fixedly connected to the top surface of the base plate (9). The push rods (10) pass through the movable shell (3) and are respectively tightened on the fixed plate (2) and the movable plate (4). A spring (11) is sleeved on the push rods (10), and one end of the spring (11) is fixedly connected to the base plate (9), and the other end of the spring (11) is fixedly connected to the bottom surface of the movable shell (3).

3. A test system for digital IO points of a programmable logic controller according to claim 2, characterized in that: A side plate (12) is fixedly connected to the side wall of the bottom plate (9), and two side plates (12) are symmetrically arranged.

4. A test system for digital IO points of a programmable logic controller according to claim 2, characterized in that: The top ends of the push rods (10) are fixedly connected with anti-skid pads (13), and the anti-skid pads (13) are respectively tightly arranged with the fixed plate (2) and the movable plate (4).

5. A test system for digital IO points of a programmable logic controller according to claim 1, characterized in that: The positioning assembly (8) includes a threaded rod (14), the threaded rod (14) is movably connected to the housing (1), the end of the threaded rod (14) away from the housing (1) is fixedly connected to a rotating wheel (15), the side wall of the threaded rod (14) is threadedly connected to a flat plate (16), the flat plate (16) is fixedly connected to two fixing rods (17), the end of the fixing rod (17) away from the flat plate (16) passes through the housing (1) and is fixedly connected to a clamping plate (18), and the fixing rod (17) is movably connected to the housing (1).

6. A test system for digital IO points of a programmable logic controller according to claim 5, characterized in that: The top surface of the clamping plate (18) is tilted toward a side away from the center of the inner cavity of the shell (1), and the length of the front and rear clamping plates (18) is greater than the length of the left and right clamping plates (18).

7. A test system for digital IO points of a programmable logic controller according to claim 1, characterized in that: A slide plate (19) is fixedly connected to the inner side wall of the movable shell (3), and a movable groove (20) is provided on the side wall of the movable plate (4). The slide plate (19) is inserted into the movable groove (20), and the slide plate (19) and the movable groove (20) are movably connected.

8. A test system for digital IO points of a programmable logic controller according to claim 1, characterized in that: A power source (21) is fixedly connected to the right outer wall of the housing (1), and the two rightmost connection terminals (5) are connected to the power source (21) via wires (6).

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