Automatic detection equipment for control cabinet

Abstract

An automatic detection device for a control cabinet relates to the technical field of PLC testing. In order to solve the technical problems that in the prior art, existing PLC testing work mainly depends on manual operation, efficiency is low, the error rate is high, consequently, testing cost is increased, the testing period is prolonged, and even the overall progress of a project is affected, the technical scheme provided by the invention is that the automatic detection mounting plate for the control cabinet comprises a testing PLC module and an automatic detection module, the test module provides a test algorithm; the analog quantity signal conversion module is used for converting the active analog quantity output signal into a passive analog quantity output signal; the digital quantity signal conversion module is used for converting the active digital quantity output signal into a passive digital quantity output signal; the analog signal introduction module is used for receiving an analog quantity input signal and sending the analog quantity input signal to the test PLC module; and the digital signal introduction module is used for receiving a digital quantity input signal and sending the digital quantity input signal to the test PLC module. The method is suitable for automatic detection of the PLC control cabinet.

Description

Technical Field

[0001] The invention relates to the technical field of PLC testing, and in particular to a PLC cabinet testing method. Background Art

[0002] In modern industrial automation systems, PLC (Programmable Logic Controller) is widely used in various automation control and monitoring tasks, and is the core component to ensure system stability and efficiency. Therefore, PLC testing is crucial to the normal operation of the entire industrial automation system. The accuracy and efficiency of the test directly affect the reliability, safety and operating cost of the system. However, the existing PLC testing process still has many limitations and technical difficulties, which urgently need to be improved.

[0003] At present, PLC testing mainly relies on manual operation, which is complex and error-prone. First, technicians need to manually set the test program according to the specific configuration of the PLC cabinet to be tested. This process usually requires an in-depth understanding of the specifications, functions and interfaces of each PLC module to ensure that the test program can cover all possible working scenarios. However, due to the wide variety and complex configuration of PLC modules, technicians not only need to spend a lot of time setting up the test program, but also easily lead to incomplete coverage or setting errors due to negligence of details.

[0004] After the test program is set up, the tester needs to manually connect the test program with each PLC module according to the program requirements. This process is extremely challenging. Due to its complexity, it has a low fault tolerance rate. A slight mistake may lead to connection errors or missed connections, thus affecting the accuracy of the test results. This manual connection process is particularly time-consuming in actual operation, and usually requires at least two technicians to work together, which increases labor costs and operation time. At the same time, due to the large number of manual operations during the test process, any irregular operation may cause system failures, further reducing the reliability of the test.

[0005] Specifically, testing usually requires:

[0006] Personnel: 2 testers operate at the same time

[0007] Time: It takes 1.5 to 2 hours to complete the test of all modules, which is time-consuming.

[0008] The test time for a DI or DO single channel is 3 seconds, the test time for a 16-channel module is about 48 seconds, and the test time for a 32-channel module is about 96 seconds

[0009] The test time for AI or AO single channel is 5 seconds, and the test time for 8-channel module is about 40 seconds

[0010] Process: The tester needs to manually plug in and power each module and channel one by one to test them.

[0011] The test results need to be recorded manually during the test process.

[0012] The test requires the use of many tools such as multimeter, signal generator, walkie-talkie, etc.

[0013] Accuracy: Due to human factors, such as fatigue, negligence, etc., the test accuracy may decrease.

[0014] Efficiency: The testing process is cumbersome, inefficient, and difficult to cope with large or urgent testing needs.

[0015] In addition, as the scale and complexity of industrial automation systems continue to increase, traditional manual PLC testing methods can no longer meet the growing demand. During large-scale PLC system testing, problems such as low efficiency and high error rate of manual operation become more prominent, resulting in increased testing costs, longer testing cycles, and even affecting the overall progress of the project.

[0016] In summary, in the prior art, testing the signal module of a PLC cabinet is a complex and time-consuming process. This is mainly because it is necessary to manually plug in and power each module and channel in order to test it, which is not only inefficient but also prone to human errors. In addition, since the test process needs to be manually recorded by personnel, it is not convenient to save.

[0017] Although there are some solutions in the prior art, such as using automated test equipment to test some modules, these solutions still have some obvious shortcomings. First, these automated test equipment can usually only test specific modules or channels, and cannot comprehensively test the correctness of the entire circuit of the cabinet from module to line. Secondly, due to the different structures and connection methods of PLC cabinets, these automated test equipment often require a lot of customization and debugging work to adapt to different test environments. This not only increases the cost of testing, but also reduces the flexibility and versatility of testing. Therefore, we need a new test tool that can comprehensively and accurately test all signal module channels and lines of the PLC cabinet, while improving the efficiency and accuracy of the test and reducing the risk of human error. Summary of the invention

[0018] In order to solve the technical problems existing in the prior art, the existing PLC testing work mainly relies on manual operation, which is inefficient and has a high error rate, resulting in increased testing costs, extended testing cycles, and even affecting the overall progress of the project, the technical solution provided by the present invention is:

[0019] The control cabinet automatically detects the mounting plate, and the mounting plate includes:

[0020] Test PLC module, used to provide test algorithm;

[0021] An analog signal conversion module, used for converting an active analog output signal into a passive analog output signal;

[0022] A digital signal conversion module, used for converting an active digital output signal into a passive digital output signal;

[0023] An analog signal introduction module is used to receive an analog input signal and send it to the test PLC module;

[0024] The digital signal introduction module is used to receive the digital input signal and send it to the test PLC module.

[0025] Furthermore, a preferred embodiment is provided, wherein the test PLC module, the analog signal conversion module, the digital signal conversion module, the digital signal introduction module and the analog signal introduction module are sequentially arranged on the mounting board.

[0026] Furthermore, a preferred embodiment is provided, which also includes a power supply module for supplying power to the test PLC module, the analog signal conversion module, the digital signal conversion module, the analog signal introduction module and the digital signal introduction module.

[0027] Furthermore, a preferred embodiment is provided, wherein the power supply module is arranged on the analog signal conversion module or the digital signal conversion module.

[0028] Furthermore, a preferred embodiment is provided, which also includes an operation module for performing an emergency stop operation on the test PLC module.

[0029] Furthermore, a preferred embodiment is provided, wherein the operation module is arranged between the analog signal conversion module and the digital signal conversion module.

[0030] Further, a preferred embodiment is provided, wherein the following automatic detection algorithm is loaded into the test PLC module:

[0031] According to the type of control cabinet module to be tested, select the corresponding preset test package and perform the test;

[0032] Pre-set test packages include:

[0033] DI32 module loop detection package, the test system sends DO signals to each channel of the DI32 module in turn, and compares the number of signals returned by each channel of the DI32 module; if it meets the preset number, the channel is judged to be normal; otherwise, the channel is judged to be wrong;

[0034] DO32 module loop detection package, the test system sends a signal to each channel of the DO32 module, and compares the number of times the DO32 module returns the signal according to the pre-designed value; if the count value matches, the channel is judged to be normal; otherwise, the channel is judged to be wrong;

[0035] AI8 module loop detection package, the test system sends different current signals to each channel of the AI ​​module in turn, compares the signal returned by the AI ​​module with the standard signal, and if the deviation is within the preset range, the channel is judged to be normal; otherwise, the channel is judged to be wrong;

[0036] AO8 module loop detection package, the test system sends different current signals to each channel of the AO module in turn, and compares the signal returned by the AI ​​module with the standard signal; if the deviation is within the standard range, the channel is judged to be normal; otherwise, the channel is judged to be wrong.

[0037] Furthermore, a preferred embodiment is provided, in which the AI8 module loop detection package includes a two-wire system and a four-wire system. In the process of sending different current signals to each channel of the AI ​​module in sequence, an active current signal is sent to the four-wire system, and a passive current signal is sent to the two-wire system.

[0038] Based on the same inventive concept, the present invention also provides an automatic detection device for a control cabinet, the device comprising a cabinet body and an automatic detection mounting plate for the control cabinet arranged in the cabinet body.

[0039] Based on the same inventive concept, the present invention also provides a control cabinet automatic detection method, which is implemented based on the control cabinet automatic detection device, and includes:

[0040] Steps of checking whether the connection between the PLC control cabinet to be tested and the automatic detection device of the control cabinet is normal;

[0041] If the connection is normal, the steps are to collect the type of the module to be tested in the PLC control cabinet to be tested;

[0042] The step of selecting the preset test package for testing according to the type of the module to be tested and outputting the test result.

[0043] Compared with the prior art, the technical solution provided by the present invention is beneficial in that:

[0044] The control cabinet automatic detection device provided by the present invention realizes the automation of the modular test process of the PLC control cabinet by automatically detecting the installation plate of the control cabinet, which significantly improves the test efficiency compared with the existing technology that relies on manual operation. The test process in the existing technology is cumbersome and time-consuming. The present invention reduces the steps of manual operation through automatic detection, shortens the test time, and greatly reduces the labor cost.

[0045] The control cabinet automatic detection device provided by the present invention can automatically identify the type of the module to be tested through a preset test package, select a corresponding test method, and ensure the accuracy of the test. Compared with the prior art method of manually setting the test program, it avoids setting errors caused by operator negligence or fatigue, and improves the reliability of the test.

[0046] The control cabinet automatic detection device provided by the present invention realizes the automatic conversion of active signals and passive signals through the analog signal conversion module and the digital signal conversion module. The prior art requires manual operation and frequent adjustments by technicians, while the present invention simplifies the signal conversion process, reduces the complexity of operation, and further reduces the incidence of human errors.

[0047] The automatic detection method of the control cabinet automatic detection device provided by the present invention automatically determines whether the channel is normal by comparing the signal returned by each module, eliminating the need to manually record the test results. Compared with the manual recording method in the prior art, it not only improves the accuracy of the results, but also facilitates the storage and analysis of the test data.

[0048] The control cabinet automatic detection device provided by the present invention provides a compact structural design, and all modules are arranged in sequence on the mounting plate, reducing the space occupied by the test equipment. Compared with the prior art which requires more manual tools (such as multimeters, signal generators, etc.), the present invention greatly simplifies the number of test equipment and improves the convenience of test operation.

[0049] The control cabinet automatic detection equipment provided by the present invention provides unified power supply for each test module through a power supply module. The present invention further improves the integration and stability of the system, avoids test result errors caused by interference or instability of external power supply equipment, and improves the reliability of the test system.

[0050] The control cabinet automatic detection device provided by the present invention has an operation module with an emergency stop function, which ensures that the operation can be quickly stopped during the test process, thereby increasing the safety of the system. This is a function generally lacking in the prior art, and can effectively prevent equipment damage or personal injury caused by emergency situations or failures.

[0051] The control cabinet automatic detection device provided by the present invention is suitable for being applied in the automatic detection work of a PLC control cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a front view of the control cabinet automatic detection device with the cabinet door removed;

[0053] Among them, 1 represents a test PLC module, 2 represents an analog signal conversion module, 3 represents a digital signal conversion module, 4 represents an analog signal introduction module, 5 represents a digital signal introduction module, and 6 represents an operation module. DETAILED DESCRIPTION

[0054] In order to make the advantages and benefits of the technical solution provided by the present invention more clearly reflected, the technical solution provided by the present invention is now further described in detail in conjunction with the accompanying drawings, specifically:

[0055] Embodiment 1: This embodiment provides a control cabinet automatic detection mounting plate, the mounting plate comprising:

[0056] A test PLC module 1, used for providing a test algorithm;

[0057] The analog signal conversion module 2 is used to convert the active analog output signal into a passive analog output signal;

[0058] A digital signal conversion module 3, used for converting an active digital output signal into a passive digital output signal;

[0059] The analog signal introduction module 4 is used to receive the analog input signal and send it to the test PLC module 1;

[0060] The digital signal introduction module 5 is used to receive a digital input signal and send it to the test PLC module 1 .

[0061] Implementation method 2. This implementation method further limits the control cabinet automatic detection installation board provided in implementation method 1, and the test PLC module 1, analog signal conversion module 2, digital signal conversion module 3, digital signal introduction module 5 and analog signal introduction module 4 are arranged in sequence on the installation board.

[0062] Implementation method three. This implementation method is a further limitation of the control cabinet automatic detection installation plate provided in implementation method two, and also includes a power supply module for supplying power to the test PLC module 1, the analog signal conversion module 2, the digital signal conversion module 3, the analog signal introduction module 4 and the digital signal introduction module 5.

[0063] Embodiment 4: This embodiment further limits the control cabinet automatic detection mounting plate provided in Embodiment 3, and the power supply module is arranged on the analog signal conversion module 2 or the digital signal conversion module 3.

[0064] Embodiment 5: This embodiment further limits the automatic detection installation plate of the control cabinet provided in Embodiment 2, and further includes an operation module 6 for performing an emergency stop operation on the test PLC module 1.

[0065] Embodiment 6: This embodiment further limits the control cabinet automatic detection installation plate provided in Embodiment 5. The operation module 6 is arranged between the analog signal conversion module 2 and the digital signal conversion module 3.

[0066] Embodiment 7: This embodiment further limits the automatic detection of the control cabinet mounting plate provided in Embodiment 1. The test PLC module 1 is loaded with the following automatic detection algorithm:

[0067] According to the type of control cabinet module to be tested, select the corresponding preset test package and perform the test;

[0068] Pre-set test packages include:

[0069] DI32 module loop detection package, the test system sends DO signals to each channel of the DI32 module in turn, and compares the number of signals returned by each channel of the DI32 module; if it meets the preset number, the channel is judged to be normal; otherwise, the channel is judged to be wrong;

[0070] DO32 module loop detection package, the test system sends a signal to each channel of the DO32 module, and compares the number of times the DO32 module returns the signal according to the pre-designed value; if the count value matches, the channel is judged to be normal; otherwise, the channel is judged to be wrong;

[0071] AI8 module loop detection package, the test system sends different current signals to each channel of the AI ​​module in turn, compares the signal returned by the AI ​​module with the standard signal, and if the deviation is within the preset range, the channel is judged to be normal; otherwise, the channel is judged to be wrong;

[0072] AO8 module loop detection package, the test system sends different current signals to each channel of the AO module in turn, and compares the signal returned by the AI ​​module with the standard signal; if the deviation is within the standard range, the channel is judged to be normal; otherwise, the channel is judged to be wrong.

[0073] Implementation method eight. This implementation method is a further limitation of the control cabinet automatic detection installation plate provided in implementation method three. The AI8 module loop detection package includes a two-wire system and a four-wire system. In the process of sending different current signals to each channel of the AI ​​module in turn, an active current signal is sent to the four-wire system, and a passive current signal is sent to the two-wire system.

[0074] Embodiment 9: This embodiment provides an automatic detection device for a control cabinet, the device comprising a cabinet body and an automatic detection mounting plate for the control cabinet provided in embodiment 7, which is arranged in the cabinet body.

[0075] Embodiment 10: This embodiment provides a control cabinet automatic detection method, which is implemented based on the control cabinet automatic detection device provided in embodiment 9, and includes:

[0076] Steps of checking whether the connection between the PLC control cabinet to be tested and the automatic detection device of the control cabinet is normal;

[0077] If the connection is normal, the steps are to collect the type of the module to be tested in the PLC control cabinet to be tested;

[0078] The step of selecting the preset test package for testing according to the type of the module to be tested and outputting the test result.

[0079] Implementation Method XI: Combination Figure 1 This embodiment is described in detail by using specific examples to further describe the technical solution provided above. Specifically:

[0080] This embodiment provides a control cabinet automatic detection device for automatic detection of a control cabinet, aiming to solve the problems of reliance on manual operation, low efficiency, high error rate, etc. in existing PLC testing work. The control cabinet automatic detection device includes: a test PLC module 1, an analog signal conversion module 2, a digital signal conversion module 3, an analog signal introduction module 4, a digital signal introduction module 5, a power supply module and an operation module 6. The modules are arranged in sequence on the mounting plate to form a compact integrated structure.

[0081] The test PLC module 1 is used to load the test algorithm, receive the signals transmitted by each signal introduction module, and analyze the signals according to the preset test package. The preset test package includes the DI32 module loop detection package, DO32 module loop detection package, AI8 module loop detection package and AO8 module loop detection package, etc., which can comprehensively test the functions and loop status of each module in the PLC control cabinet.

[0082] The analog signal conversion module 2 and the digital signal conversion module 3 are used to convert active analog and digital signals into passive signals to meet different test requirements. The analog signal introduction module 4 and the digital signal introduction module 5 are used to receive the analog and digital input signals in the PLC control cabinet to be tested, and transmit them to the test PLC module 1 for analysis.

[0083] The power module provides unified power supply for each module to ensure stable operation of the system. The operation module 6 is used to implement emergency stop operation in emergency situations to ensure system safety.

[0084] Example 1: Automatic testing of DI32 module

[0085] In this embodiment, the test PLC module 1 is loaded with the DI32 module loop detection package, which is used to automatically test the 32 channels of the DI32 module. The operation steps are as follows:

[0086] Connect the DI32 module of the PLC control cabinet to be tested to the control cabinet automatic detection mounting plate through the digital signal introduction module 5.

[0087] Start testing PLC module 1 and select "DI32 module loop detection package".

[0088] Test that PLC module 1 sends DO signals to each channel of DI32 module in turn, and monitors the signals returned by DI32 module at the same time.

[0089] The test PLC module 1 compares the number of return signals of each channel. If it meets the preset number, the channel is judged to be normal; otherwise, the channel is judged to be wrong.

[0090] After completing the detection of all channels, the test PLC module 1 outputs the test results and generates a test report.

[0091] This embodiment avoids the process of manually testing channels one by one, greatly improves the test efficiency, and reduces the occurrence of human errors.

[0092] Example 2: Automatic testing of AI8 module

[0093] This example introduces the process of automatically testing the AI8 module, which is applicable to the analog input module in the PLC control cabinet. The operation steps are as follows:

[0094] Connect the AI8 module of the PLC control cabinet to be tested to the automatic detection mounting plate of the control cabinet through the analog signal introduction module 4.

[0095] Start testing PLC module 1 and select "AI8 module loop detection package".

[0096] The test PLC module 1 sends different current signals (such as 4-20mA) to each channel of the AI8 module in turn, and receives the signals returned by the AI8 module.

[0097] The test PLC module 1 compares the signal returned by the AI8 module with the standard signal. If the deviation is within the preset range, the channel is judged to be normal; otherwise, the channel is judged to be wrong.

[0098] It sends active current signals to four-wire AI8 modules and passive current signals to two-wire AI8 modules to adapt to different types of modules.

[0099] After the test is completed, the test PLC module 1 outputs the test results, records the deviation data and generates a report.

[0100] This embodiment replaces the complex manual operations by automatically detecting the current signal and comparing the deviation, thereby improving the accuracy and efficiency of the test.

[0101] Example 3: Automatic testing of DO32 module

[0102] In this embodiment, the DO32 module loop detection package is used to automatically detect the digital output module in the PLC control cabinet.

[0103] The steps are as follows:

[0104] The DO32 module of the PLC control cabinet to be tested is connected to the control cabinet automatic detection mounting plate through the digital signal introduction module 5.

[0105] Start testing PLC module 1 and select "DO32 module loop detection package".

[0106] The test PLC module 1 sends a signal to each channel of the DO32 module in turn, and compares the number of times the DO32 module returns the signal according to the preset count value.

[0107] If the count values ​​match, the channel is judged to be normal; otherwise, the channel is judged to be wrong.

[0108] After the test is completed, the test PLC module 1 outputs the test results and generates a detailed test report.

[0109] This embodiment simplifies the operation steps of traditional manual testing and greatly improves the accuracy of the test through automated signal sending and comparison processes.

[0110] The automatic detection algorithm is as follows:

[0111] Multiple preset test packages are provided, including different types of PLC module test logic, all automatically executed by the software system. The following is the test logic and process of the preset test package, focusing on the analysis from the software perspective.

[0112] Test logic of preset test package:

[0113] DI32 module loop detection package

[0114] Test logic: After receiving the start command, the system sends a DO signal to each channel of the DI32 module in turn. The signal received by each channel will be returned to the system, and the system will compare the number of returned signals with the expected value. If the returned signal meets the preset number of times, the channel is considered normal; otherwise, the system will delay and retry. If the correct signal is still not received, it will be marked as a channel error.

[0115] Software processing: The system automatically generates and sends DO signals and receives data fed back by the DI module. The software logic automatically performs signal comparison and records errors and retries when an abnormality is detected until the final result is determined.

[0116] DO32 module loop detection package

[0117] Test logic: The system sends a signal to each channel of the DO32 module and records the returned response signal through the DI module. The system compares the number of returned signals according to the pre-designed value. If the count value matches, the channel is judged to be normal; if it does not match or the delay exceeds the specified time, it is judged to be a channel error.

[0118] Software processing: The software automatically sends out DO signals and records the return signals of the DI module for automatic comparison. If an error is detected, the system will immediately generate an error report without manual intervention.

[0119] AI8 (four-wire) module loop detection package

[0120] Test logic: The system sends different current signals (8mA, 12mA, 16mA, 20mA) to each channel of the AI ​​module in turn, and receives the digital signal fed back by the AI ​​module. The system compares the received signal with the standard signal. If the deviation is within the preset range, the channel is judged to be normal; if the deviation exceeds the range, it is judged that the signal accuracy is insufficient or the channel is damaged.

[0121] Software processing: The system automatically sends out current signals and records the analog-to-digital conversion results returned by the AI ​​module. The software automatically calculates the accuracy and determines whether it meets the standard value. In case of abnormality, the system automatically marks the problem channel.

[0122] AI8 (two-wire) module loop detection package

[0123] Test logic: Similar to the four-wire test, the difference is that the current signal sent by the system is a passive signal, and the other steps are the same as the four-wire test. The system also compares the returned digital signal with the standard value and automatically generates an accuracy determination report.

[0124] Software processing process: The software system sends out a passive current signal and receives feedback signals from the AI ​​module to automatically complete signal comparison and accuracy analysis.

[0125] AO8 module loop detection package

[0126] Test logic: The system sends different current signals (8mA, 12mA, 16mA, 20mA) to each channel of the AO module in turn, and returns them to the AI ​​module through the test fixture for analog-to-digital conversion, and finally compares the signal returned by the AI ​​module with the standard signal. If the deviation is within the standard range, the channel is judged to be normal; otherwise, it is recorded as abnormal.

[0127] Software processing: The system sends out current signals and receives feedback analog-to-digital conversion data. The software automatically performs comparison and outputs the results.

[0128] How to select a test package:

[0129] Selection based on PLC function module type

[0130] The operator can select the corresponding test package through the software interface according to the module type of the PLC cabinet to be tested. The optional test packages include DI32 module, DO32 module, AI8 (four-wire system), AI8 (two-wire system) and AO8 module, etc. The system loads the corresponding test logic according to the module type selected by the user.

[0131] Module type selection via automatic detection

[0132] The system supports automatic identification of the module type of the PLC cabinet and recommends the corresponding test package. The software automatically matches the most appropriate test logic by reading the PLC configuration, reducing the possibility of manual intervention and selection errors.

[0133] Loading of predefined test scenarios

[0134] The software also supports predefined test plans. Operators can directly select a set of test plans suitable for a specific type of PLC cabinet without having to select test packages one by one. The system will automatically perform tests on all modules in the plan to ensure completeness and efficiency.

[0135] Through these options, the software ensures automation and flexibility of the test, which can adapt to different types of module testing requirements and reduce the workload of operators.

[0136] The technical solution provided by the present invention is further described in detail above through several specific implementation modes in order to highlight the advantages and benefits of the technical solution provided by the present invention. However, the several specific implementation modes described above are not intended to be used as limitations on the present invention. Any reasonable modification and improvement of the present invention, combination of implementation modes and equivalent substitution within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The control cabinet automatically detects the installation plate, which is characterized by: The mounting plate comprises: Test PLC module, used to provide test algorithm; An analog signal conversion module, used for converting an active analog output signal into a passive analog output signal; A digital signal conversion module, used for converting an active digital output signal into a passive digital output signal; An analog signal introduction module is used to receive an analog input signal and send it to the test PLC module; The digital signal introduction module is used to receive the digital input signal and send it to the test PLC module.

2. The control cabinet automatic detection mounting plate according to claim 1, characterized in that: The test PLC module, the analog signal conversion module, the digital signal conversion module, the digital signal introduction module and the analog signal introduction module are arranged in sequence on the installation board.

3. The control cabinet automatic detection mounting plate according to claim 2, characterized in that: It also includes a power supply module for supplying power to the test PLC module, the analog signal conversion module, the digital signal conversion module, the analog signal introduction module and the digital signal introduction module.

4. The control cabinet automatic detection mounting plate according to claim 3 is characterized in that: The power supply module is arranged on the analog signal conversion module or the digital signal conversion module.

5. The control cabinet automatic detection mounting plate according to claim 2, characterized in that: It also includes an operating module for performing an emergency stop operation on the test PLC module.

6. The control cabinet automatic detection mounting plate according to claim 5, characterized in that: The operation module is arranged between the analog signal conversion module and the digital signal conversion module.

7. The control cabinet automatic detection mounting plate according to claim 1, characterized in that: The following automatic detection algorithm is loaded into the test PLC module: According to the type of control cabinet module to be tested, select the corresponding preset test package and perform the test; Preset test packages include: DI32 module loop detection package, the test system sends DO signals to each channel of the DI32 module in turn, and compares the number of signals returned by each channel of the DI32 module; if it meets the preset number, the channel is judged to be normal; otherwise, the channel is judged to be wrong; DO32 module loop detection package, the test system sends a signal to each channel of the DO32 module, and compares the number of times the DO32 module returns the signal according to the pre-designed value; if the count value matches, the channel is judged to be normal; otherwise, the channel is judged to be wrong; AI8 module loop detection package, the test system sends different current signals to each channel of the AI ​​module in turn, compares the signal returned by the AI ​​module with the standard signal, and if the deviation is within the preset range, the channel is judged to be normal; otherwise, the channel is judged to be wrong; AO8 module loop detection package, the test system sends different current signals to each channel of the AO module in turn, and compares the signal returned by the AI ​​module with the standard signal; if the deviation is within the standard range, the channel is judged to be normal; otherwise, the channel is judged to be wrong.

8. The control cabinet automatic detection mounting plate according to claim 3, characterized in that: The AI8 module loop detection package includes two-wire and four-wire systems. In the process of sending different current signals to each channel of the AI ​​module in turn, an active current signal is sent to the four-wire system and a passive current signal is sent to the two-wire system.

9. Automatic detection equipment for control cabinet, characterized in that: The device includes a cabinet body and a control cabinet automatic detection mounting plate according to claim 7 arranged in the cabinet body.

10. The control cabinet automatic detection method is characterized in that: The method is implemented based on the control cabinet automatic detection device according to claim 9, and includes: Steps of checking whether the connection between the PLC control cabinet to be tested and the automatic detection device of the control cabinet is normal; If the connection is normal, the steps are to collect the type of the module to be tested in the PLC control cabinet to be tested; The step of selecting the preset test package for testing according to the type of the module to be tested and outputting the test result.

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