CN110703125A - Plc terminal detection device and detection method - Google Patents
Plc terminal detection device and detection method Download PDFInfo
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- CN110703125A CN110703125A CN201910742006.9A CN201910742006A CN110703125A CN 110703125 A CN110703125 A CN 110703125A CN 201910742006 A CN201910742006 A CN 201910742006A CN 110703125 A CN110703125 A CN 110703125A
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Abstract
The invention discloses a plc terminal detection device and a plc terminal detection method, which comprise a shell, wherein a processor is arranged in the shell, a control circuit is connected to the processor, and the control circuit is connected with a plurality of detection probes; the end part of the shell is provided with a magnet, two rows of detection probes are movably embedded in the magnet, the positions of the two rows of detection probes correspond to the plc terminals one by one, an insulating plate is arranged outside the magnet, and the insulator, the magnet and the shell are integrally connected; all the detection probes in each row are commonly penetrated and fixed in the same magnetic sheet, and the magnetic sheet and the magnet repel each other; the side wall of the shell is further provided with an expansion plug, the expansion plug is connected with the controller, and the controller is further connected with a touch screen. The invention can quickly detect the quality of the plc terminal, reduce the danger in work and improve the work efficiency.
Description
Technical Field
The invention belongs to the field of plc, and particularly relates to a plc terminal detection device and a plc terminal detection method.
Background
With the rapid development of modern science and technology, the PLC has good stability and reliability as a core controller of industrial automation equipment, and is more and more widely applied to the current automation control. However, the terminals of the PLC, which are connected to the external element, are easily damaged by excessive current or voltage flowing through the element. And the conventional method is to rewrite the test program and power on the device, and then press a button to test. The quality of the plc terminal is judged by observing the on/off of the terminal lamp on the plc.
However, powering on the damaged device and rewriting the test program not only wastes time and labor, but also increases the danger to the staff.
Disclosure of Invention
The invention aims to solve the technical problem of providing a plc terminal detection device and a plc terminal detection method aiming at the defects of the background art.
The invention adopts the following technical scheme for solving the technical problems:
a plc terminal detection device comprises a shell, wherein a processor is arranged in the shell, and is connected with a control circuit which is connected with a plurality of detection probes; the end part of the shell is provided with a magnet, two rows of detection probes are movably embedded in the magnet, the positions of the two rows of detection probes correspond to the plc terminals one by one, an insulating plate is arranged outside the magnet, and the insulator, the magnet and the shell are integrally connected; all the detection probes in each row are commonly penetrated and fixed in the same magnetic sheet, and the magnetic sheet and the magnet repel each other; the side wall of the shell is further provided with an expansion plug, the expansion plug is connected with the controller, and the controller is further connected with a touch screen.
A plc terminal detection method includes the following steps:
step one, inputting a plc model and the number of plc terminals, and selecting whether to add an expansion module according to the number of the plc terminals;
selecting a plc connection mode;
step three, after a plc connection mode is selected, circuit adjustment is carried out, the detection probe is butted with the plc terminal and the shell is pressed down by force, the plc terminal at the high position butts against the detection probe and then jacks up the detection probe and a magnetic sheet connected with the detection probe, and the plc terminal and the detection probe form good contact by the thrust of a magnet to the magnetic sheet; then, the shell is continuously pressed down, so that the plc terminal at the lower position is in good contact with the other row of detection probes;
and step four, starting power-on detection, wherein when a detected plc terminal is on, the plc terminal is normal, and when the plc terminal is not on, the plc terminal is damaged.
Further, in the first step, whether an expansion module is additionally installed is selected according to the number of the plc terminals, and if the expansion module needs to be additionally installed, the expansion plug on the shell is inserted into the expansion socket.
Further, in the second step, if the plc connection mode is selected as the source connection method, the x and y ports of the plc terminal are opposite to the zero line of the detection device, and the com port of the plc terminal corresponds to the live line of the detection device; and if the leakage connection method is selected, the x and y ports correspond to the live wire of the detection device, and the com port of the plc corresponds to the zero wire of the detection device.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the invention designs a plc terminal detection device, which is based on the characteristic that after the plc terminal is conducted, the corresponding diode can emit light. People can connect the device with the plc, input the model and the number of the terminals of the plc in the touch screen, the internal processor in the device controls the on-off of the internal circuit according to the distribution condition of the model of the plc terminals and the wiring condition of the plc, the internal power supply circuit in the invention is used for supplying power to the com terminal, the x terminal and the y terminal of the model plc, and the light-emitting state of the corresponding diode is observed. The normal light emission of the light emitting diode corresponding to plc indicates that the terminal is normal, and if the light emitting diode does not emit light, the terminal is determined to be damaged.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is a schematic structural diagram of the present embodiment;
FIG. 3 is a diagram showing a structure of a control circuit according to the present embodiment;
FIG. 4 is a diagram showing the connection of plc terminals according to the present embodiment;
FIG. 5 is a circuit diagram of the plc and the detecting device according to the present embodiment.
In the figure, 1, a housing; 2. a magnet; 3. an insulating plate; 4. iron sheets; 5. detecting a probe; 6. expanding the plug; 7. expanding the socket; 8. expanding the plug; 9. and a plc terminal.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
a plc terminal detection device, as shown in FIGS. 1, 2, 3, 4 and 5, comprises a housing, wherein a processor is arranged in the housing, a control circuit is connected to the processor, and the control circuit is connected to a plurality of detection probes; the end part of the shell is provided with a magnet, two rows of detection probes are movably embedded in the magnet, the positions of the two rows of detection probes correspond to the plc terminals one by one, an insulating plate is arranged outside the magnet, and the insulator, the magnet and the shell are integrally connected; all the detection probes in each row are commonly penetrated and fixed in the same magnetic sheet, and the magnetic sheet and the magnet repel each other; the side wall of the shell is further provided with an expansion plug, the expansion plug is connected with the controller, and the controller is further connected with a touch screen.
A plc terminal detection method includes the following steps:
step one, inputting a plc model and the number of plc terminals, and selecting whether to add an expansion module according to the number of the plc terminals;
selecting a plc connection mode;
step three, after a plc connection mode is selected, circuit adjustment is carried out, the detection probe is butted with the plc terminal and the shell is pressed down by force, the plc terminal at the high position butts against the detection probe and then jacks up the detection probe and a magnetic sheet connected with the detection probe, and the plc terminal and the detection probe form good contact by the thrust of a magnet to the magnetic sheet; then, the shell is continuously pressed down, so that the plc terminal at the lower position is in good contact with the other row of detection probes;
and step four, starting power-on detection, wherein when a detected plc terminal is on, the plc terminal is normal, and when the plc terminal is not on, the plc terminal is damaged.
Further, in the first step, whether an expansion module is additionally installed is selected according to the number of the plc terminals, and if the expansion module needs to be additionally installed, the expansion plug on the shell is inserted into the expansion socket.
Further, in the second step, if the plc connection mode is selected as the source connection method, the x and y ports of the plc terminal are opposite to the zero line of the detection device, and the com port of the plc terminal corresponds to the live line of the detection device; and if the leakage connection method is selected, the x and y ports correspond to the live wire of the detection device, and the com port of the plc corresponds to the zero wire of the detection device.
Description of specific embodiments:
introduction of modules:
the touch screen can input information such as the model of the plc, the number of terminals and the like by people, and can select the wiring mode of the plc to control the starting or the closing detection.
And the processor controls the power supply circuit to supply power to the detection circuit according to the information input by the touch screen, and adjusts the control circuit to enable the detection probe on the device to correspond to the plc X and Y, com ends needing to be detected currently.
A power supply circuit: the currently required voltage is provided according to the terminal voltage currently required for plc.
The control circuit: the relay K, KK is controlled to be turned on and off according to the plc connection method, so that the detection probe corresponds to the plc terminal and forms a circuit with the terminal.
An expansion module: the detection probe and the control circuit are also provided, when the plc terminals are too many, a proper expansion module is additionally arranged according to the situation, and an expansion plug is inserted into an expansion socket during use. There may be a processor controlled detection.
When the plc terminal is damaged, it is necessary to check whether the plc terminal is good or bad. The model of the plc and the number of plc terminals need to be input on a touch screen of the device, and then whether an expansion module is added or not is selected according to the number of the terminals, wherein the connection mode of the model of the plc is a source connection method or a leakage connection method. After the plc basic information is determined, the touch screen transmits the information to a processor in the device, the processor adjusts an internal circuit of the device according to the information, the internal circuit is as shown in a circuit principle of fig. 5 (for clarity of description, an electrical principle diagram is a leakage connection method for illustration), and the processor controls the on-off of a relay switch (K, KK) of a corresponding plc terminal according to the distribution condition of the plc terminals (the plc com terminals of different models are not distributed uniformly, but the distance between each terminal is the same).
Example (c): the plc is a leakage type connection method, the processor controls K2 and KK2 corresponding to the plc com end in the device to be closed, the terminal is connected with a zero line N in the device, and K1, K3, K5, K7, KK1, KK3, KK5 and KK7 corresponding to the X, Y terminal are closed … to enable a X, Y terminal to be connected with a live line L in the device. The test probe 5 on the device is now placed in alignment with the plc terminal as shown in the schematic use of figure 3 and the device is then depressed into operative contact with the plc terminal. Because the detecting probe 5 and the iron sheet 4 are designed into a whole, and the magnet 2 and the insulating plate 3 are connected with the shell 1 into a whole. And the magnetic force generated by the magnet 2 is designed to repel the iron piece 4. Therefore, when the plc terminal at the upper position contacts the detecting probe 5 during the pressing down process of the present device, the detecting probe 5 is pushed up against the repulsive force of the magnet in the V2 direction shown in the moving state of fig. 4, and the plc terminal at the lower position contacts the detecting probe 5 which is moved in the V1 direction shown in the moving state of fig. 4 by the repulsive force. At this point, the X, Y, com terminal on plc makes effective contact with the test.
When the detection probe 5 of the device is effectively contacted with the plc terminal, the touch screen can be controlled to start detection, and the power supply circuit in the device supplies power to the detection circuit, namely X, Y forms a loop with com through the detection circuit. When the terminals on the plc are normal, the leds in the plc will emit light after passing current. One can determine whether the plc terminal is damaged by observing whether the led on the corresponding terminal on the plc is emitting light. The corresponding diode is illuminated to indicate that the plc terminal is good, and the corresponding diode is not illuminated to indicate that the plc terminal is damaged. One can replace or repair the terminals accordingly.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention. While the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (4)
1. A plc terminal detection device, characterized in that: the device comprises a shell, wherein a processor is arranged in the shell, a control circuit is connected to the processor, and the control circuit is connected with a plurality of detection probes; the end part of the shell is provided with a magnet, two rows of detection probes are movably embedded in the magnet, the positions of the two rows of detection probes correspond to the plc terminals one by one, an insulating plate is arranged outside the magnet, and the insulator, the magnet and the shell are integrally connected; all the detection probes in each row are commonly penetrated and fixed in the same magnetic sheet, and the magnetic sheet and the magnet repel each other; the side wall of the shell is further provided with an expansion plug, the expansion plug is connected with the controller, and the controller is further connected with a touch screen.
2. A plc terminal detection method is characterized in that: the method comprises the following steps:
step one, inputting a plc model and the number of plc terminals, and selecting whether to add an expansion module according to the number of the plc terminals;
selecting a plc connection mode;
step three, after a plc connection mode is selected, circuit adjustment is carried out, the detection probe is butted with the plc terminal and the shell is pressed down by force, the plc terminal at the high position butts against the detection probe and then jacks up the detection probe and a magnetic sheet connected with the detection probe, and the plc terminal and the detection probe form good contact by the thrust of a magnet to the magnetic sheet; then, the shell is continuously pressed down, so that the plc terminal at the lower position is in good contact with the other row of detection probes;
and step four, starting power-on detection, wherein when a detected plc terminal is on, the plc terminal is normal, and when the plc terminal is not on, the plc terminal is damaged.
3. The plc terminal inspecting method according to claim 2, wherein: in the first step, whether an expansion module is additionally installed is selected according to the number of the plc terminals, and if the expansion module needs to be additionally installed, an expansion plug on the shell is inserted into an expansion socket.
4. The plc terminal inspecting method according to claim 2, wherein: in the second step, the plc connection mode is selected as a source connection method, the x and y ports of the plc terminal correspond to the zero line of the detection device, and the com port of the plc terminal corresponds to the live line of the detection device; and if the leakage connection method is selected, the x and y ports correspond to the live wire of the detection device, and the com port of the plc corresponds to the zero wire of the detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910742006.9A CN110703125A (en) | 2019-08-12 | 2019-08-12 | Plc terminal detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910742006.9A CN110703125A (en) | 2019-08-12 | 2019-08-12 | Plc terminal detection device and detection method |
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| CN110703125A true CN110703125A (en) | 2020-01-17 |
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| CN201910742006.9A Pending CN110703125A (en) | 2019-08-12 | 2019-08-12 | Plc terminal detection device and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112241140A (en) * | 2020-10-28 | 2021-01-19 | 浙江佳乐科仪股份有限公司 | Efficient PLC detection device |
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| CN106646024A (en) * | 2016-11-03 | 2017-05-10 | 谢梦 | Rapid line tester |
| CN106707565A (en) * | 2016-11-28 | 2017-05-24 | 深圳市华星光电技术有限公司 | Probe component |
| US20190302163A1 (en) * | 2018-03-28 | 2019-10-03 | Texas Instruments Incorporated | Floating input detection |
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2019
- 2019-08-12 CN CN201910742006.9A patent/CN110703125A/en active Pending
Patent Citations (5)
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| CN1542579A (en) * | 2003-11-04 | 2004-11-03 | 上海理工大学 | PLC data monitoring and setting apparatus |
| CN102455701A (en) * | 2010-10-22 | 2012-05-16 | 施耐德电器工业公司 | Programmable logic controller (PLC) automatic testing platform using programmable relay structure |
| CN106646024A (en) * | 2016-11-03 | 2017-05-10 | 谢梦 | Rapid line tester |
| CN106707565A (en) * | 2016-11-28 | 2017-05-24 | 深圳市华星光电技术有限公司 | Probe component |
| US20190302163A1 (en) * | 2018-03-28 | 2019-10-03 | Texas Instruments Incorporated | Floating input detection |
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| CN112241140A (en) * | 2020-10-28 | 2021-01-19 | 浙江佳乐科仪股份有限公司 | Efficient PLC detection device |
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Application publication date: 20200117 |