Multi-model multi-signal test box

Abstract

The utility model provides a multi-model multi-signal test box, including control module, display module, communication module, detection module, the control module is PLC, control module and display module share 24VDC power supply, and use CAN bus to communicate with each other, the communication module and the detection module are respectively directly inserted behind the control module, adopt EtherCAT communication with the control module, and the detection module adopts the CAN bus to communicate with the control module. The communication module comprises two CAN communication modules and three 485 communication modules, and is connected with the master controller to be tested through an AMP plug. According to the multi-model multi-signal test box, three different models of master controllers can be detected, the test time is greatly shortened, the test efficiency is improved, and meanwhile, targeted repair and replacement are performed for faults occurring in the test.

Description

Technical Field

[0001] The utility model relates to a PLC main controller test box, in particular to a multi-model multi-signal test box. Background Art

[0002] The mining high-voltage inverter used in coal mines uses the PLC main controller as the core for speed regulation and start-stop control. The control core of the entire inverter is based on the PLC main controller to realize the processing, control and instruction sending of various information. The PLC main controller communicates data with the detection module and the display module through the field bus, obtains the detection data according to the detection module, completes the data collection and output of the inverter equipment, and transmits the operating status information of the inverter to the display module in real time; the PLC main controller communicates with two digital processing units (the digital processing unit is the core of the inverter to control the inverter output, mainly receives the control command of the main controller, drives the modulation module, and triggers the inverter module. At the same time, it can receive the feedback signal of the modulation module to realize the protection function of the system loop.) through the field bus to control and obtain the working status of the digital processing unit.

[0003] The current PLC master controller has many models and diverse transmission signals, which brings inconvenience to the factory test of the master controller. First, there are many test equipments, and second, the test is not convenient enough. Each test signal needs to be tested separately at the same time, and there is no overall unified test. As a result, the test time is long and the efficiency is low.

[0004] There are three main types of PLC master controllers currently used in high-voltage inverters, namely TX-BP2000-V01, TX-BP2000-V03, and TX-BP3000-V01. Among them, TX-BP2000-V01 uses Beckhoff PLC and related modules, including 1 PLC-A, 2 digital input modules-A, 1 digital output module-A, 1 analog input module-A, 1 profibus communication module, 2 CAN communication modules-A, 2 CAN bridges, 1 24VDC power supply, and 1 220VAC power supply. It mainly tests whether the input and output of the above modules are normal, and whether the voltage output is normal. The test signals include: DI, DO, AI, voltage signal, profibus signal, CAN communication, etc.

[0005] TX-BP2000-V03 uses Beckhoff PLC and related modules, including 1 PLC-A, 2 digital input modules-A, 1 digital output module-A, 1 analog input module-A, 2 485 communication modules-A, 2 CAN communication modules-A, 2 CAN bridges, 1 24VDC power supply, and 1 220VAC power supply. It mainly tests whether the input and output of the above modules are normal, and whether the voltage output is normal. The test signals include: DI, DO, AI, voltage signal, 485 signal, CAN communication, etc.

[0006] TX-BP3000-V01 uses TAC type PLC and related modules, including 1 PLC-B, 2 digital input modules-B, 1 digital output module-B, 1 analog input module-B, 2 485 communication modules-B, 2 CAN communication modules-B, 2 CAN bridges, 1 24VDC power supply, 1 220VAC power supply. It mainly tests whether the input and output of the above modules are normal, and whether the voltage output is normal. The test signals include: DI, DO, AI, voltage signal, 485 signal, CAN communication, etc.

[0007] The test box mainly collects the DI, DO, and AI information of the tested main controller through the CAN bus, and the three 485 communication modules collect the 485 communication modules of the tested main controller. The following table is the information description of the three main controllers:

[0008]

[0009] For integrated testing of main controllers with multiple signal combinations composed of different PLCs and related modules, a test box is needed to complete the testing of 3 different types of main controllers, thereby greatly shortening the test time, improving the test efficiency, and at the same time carrying out targeted repairs and replacements for faults that occur during the test. Utility Model Content

[0010] The utility model provides a multi-model multi-signal test box, which solves the problem of detecting three different models of main controllers. The technical solution is as follows:

[0011] A multi-model multi-signal test box comprises a control module, a display module and a communication module. The control module is a PLC. The control module and the display module share a 24VDC power supply. The two communicate using a CAN bus. The communication module and the detection module are respectively directly plugged behind the control module and communicate with the control module using EtherCAT. The communication module comprises two CAN communication modules and three 485 communication modules, and is connected to a main controller to be tested via an amp plug.

[0012] The display module is connected to a 7-inch touch screen for displaying signal test status, communication information, and fault display. Any one of the three main controllers to be tested can be selected by touching the buttons.

[0013] The first CAN communication module of the communication module is connected to the amp plug CZ1, and performs CAN signal communication with the CAN communication module 1 of the main controller under test through the XS1 amp plug.

[0014] The second CAN communication module of the communication module is connected to the amp plug CZ2, and performs CAN signal communication with the CAN communication module 2 of the main controller under test through the XS2 amp plug.

[0015] The three 485 communication modules of the communication module are connected to the amp plug CZ3, and signal communication is performed with the three 485 communication modules of the main controller under test through the XS3 amp plug.

[0016] It also includes a detection module, which serves as a tail end module and is hung at the end of other modules.

[0017] The two CAN communication modules are used to collect the DI module, DO module, AI module, voltage signal, and CAN communication signal of the main controller under test, and the 485 communication module is used to collect the 485 signal and profibus signal of the main controller under test.

[0018] The multi-model multi-signal test box and the main controller under test both use three 23-pin amp plugs.

[0019] The display screen is used to display the channel information of each module, with a green light when normal and a red light when abnormal.

[0020] The multi-model multi-signal test box can complete the detection of three different models of main controllers, greatly shorten the test time, improve the test efficiency, and at the same time carry out targeted repair and replacement of faults that occur during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a connection diagram of the multi-model multi-signal test box connected to the main controller;

[0022] Figure 2 is a circuit diagram of the multi-model multi-signal test box connected to a main controller;

[0023] Figure 3 is a schematic diagram of the internal components of the multi-model multi-signal test box;

[0024] Figure 4 Schematic diagram of the display screen of the multi-model multi-signal test box. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, the multi-model multi-signal test box is connected to the main controller under test through three amp plugs.

[0026] like Figure 2 As shown, the three tested master controllers all use three 23-pin amp plugs, namely XS1, XS2, and XS3, with built-in 220V AC, 24V DC, and 12V DC power supplies. The XS1 amp plug is connected to the PLC and CAN communication module 1, the XS2 amp plug is connected to the CAN communication module 2, and the XS3 amp plug is connected to three 485 communication modules.

[0027] The multi-model multi-signal test box adopts a 220VAC plug, has a power switch S1, and outputs three 23-pin amp plugs CZ1, CZ2, and CZ3, which are directly plugged into the amp plugs of the main controller under test, namely CZ1-XS1, CZ2-XS2, and CZ3-XS3, respectively, to complete power-on and signal testing.

[0028] like Figure 3 As shown, the multi-model multi-signal test box includes four parts: control module, display module, communication module, and detection module. The control module is a PLC, which shares a 24VDC power supply with the display module, and the two communicate using a CAN bus. The display module is connected to a display screen, which is a 7-inch touch screen that can display signal test status, communication information, fault display, etc. Any one of the three main controllers can be selected by touching the button, which is simple to operate and concise and clear to observe.

[0029] The communication module and the detection module are respectively directly plugged into the back of the control module and adopt EtherCAT communication. The communication module includes two CAN communication modules and three 485 communication modules. The first CAN communication module of the communication module is connected to the amp plug CZ1, and performs CAN signal communication with the CAN communication module 1 of the main controller under test through the XS1 amp plug; the second CAN communication module of the communication module is connected to the amp plug CZ2, and performs CAN signal communication with the CAN communication module 2 of the main controller under test through the XS2 amp plug; the three 485 communication modules of the communication module are connected to the amp plug CZ3, and perform signal communication with the three 485 communication modules of the main controller under test through the XS3 amp plug.

[0030] The detection module is a tail module, which is specified by the PLC manufacturer and has no practical use. It is just hung at the end of other modules.

[0031] The multi-model multi-signal test box and the main controller under test are connected correspondingly through three amp plugs to realize the transmission of CAN, 485 and profibus signals; wherein the CAN bus collects the DI module, DO module and AI module information of the main controller under test, and the communication module collects the 485 signal and profibus signal of the main controller under test.

[0032] When all modules in the tested main controller are normal, the channel information of each module will be displayed on the screen. Normal light is green, and abnormal light is red. Figure 4 As shown, taking the DI module as an example, when all 16 channels of the tested main controller are normal (all send data 16#FF normally), data is transmitted to the test box through the CAN bus, and 16 channels are displayed as green lights on the display screen, and the normal module information is displayed on the right; the 485 communication module and the CAN communication module will receive data and heartbeats, and the normal module information will be displayed when everything is normal.

[0033] Embodiment 1:

[0034] The tested main controller 1 uses Beckhoff PLC and related modules, among which Beckhoff PLC realizes the processing, control and sending of various information, and the related modules include 2 digital input modules-A, which mainly detect various emergency stop signals, pilot signals and feedback signals, etc.; 1 digital output module-A, which mainly controls the contactor to be attracted / disconnected, controls the electric ball valve, leakage lock control, etc.; 1 analog input module-A, which mainly receives temperature value, humidity value and 4-20ma signal; 2 485 communication modules-A, which communicate with 2 main boards for data transmission respectively; 2 CAN communication modules-A, which mainly realize communication with display screen and keyboard module for data transmission; 2 CAN bridges, which realize communication with modules of different baud rates (the default baud rate of the 2 CAN communication modules inside the main controller is 250Kbps, but the baud rate of the connected device is uncertain, so a CAN bridge is added for baud rate conversion). 1 24VDC power supply and 1 220VAC power supply are mainly used to test whether the input and output of the above modules are normal and whether the voltage output is normal. The test signals include: DI, DO, AI, voltage signal, 485 signal, CAN communication, etc.

[0035] The modules of the tested main controller 1 are plug-in, from left to right: communication coupling module-digital input module-digital output module-analog input module-tail module. Except for the tail module, the information of all modules is transmitted to the outside through the communication coupling module in the form of CAN bus. Connected to the multi-model multi-signal test box provided by the utility model, the CAN communication module of the tested main controller collects the digital input module (DI), digital output module (DO), analog input module (AI), CAN communication and voltage signals, and transmits the channel data of each module through the amp plugs XS1 and XS2. The 485 communication module transmits the channel data of each module through the amp plug XS3. When the data is sent normally, the display screen is displayed as a green light.

[0036] Embodiment 2:

[0037] The tested main controller 2 uses Beckhoff PLC and related modules, among which Beckhoff PLC realizes the processing, control and instruction sending of various information. The related modules include 2 digital input modules-A, which mainly detect various emergency stop signals, pilot signals and feedback signals, etc.; 1 digital output module-A, which mainly controls the contactor on / off, controls the electric ball valve, leakage lock control, etc.; 1 analog input module-A, which mainly receives temperature value, humidity value and 4-20ma signal; 1 profibus (a protocol of Siemens, also a two-wire system) communication module, which mainly realizes communication with the sinamics motherboard for data transmission (using 485 communication); 2 CAN communication modules-A, which mainly realize communication with the display screen and keyboard module for data transmission; 2 CAN bridges, which realize communication of modules with different baud rates; 1 24VDC power supply and 1 220VAC power supply, which mainly test whether the input and output of the above modules are normal and whether the voltage output is normal. The test signals include: DI, DO, AI, voltage signal, profibus signal, CAN communication, etc.

[0038] Connected to the multi-model multi-signal test box provided by the utility model, the CAN communication module of the main controller under test collects the digital input module (DI), digital output module (DO), analog input module (AI), CAN communication and voltage signals, and transmits the channel data of each module through the amp plugs XS1 and XS2. The profibus communication module transmits the channel data of each module through the amp plug XS3. When the data is sent normally, the display screen shows a green light.

[0039] Embodiment three:

[0040] The main controller 3 under test uses TAC type PLC and related modules, among which TAC type PLC realizes the processing, control and sending of various information, and the related modules include 2 digital input modules-B, which mainly detect various emergency stop signals, pilot signals and feedback signals, etc.; 1 digital output module-B, which mainly controls the contactor to close / disconnect, control the electric ball valve, leakage lock control, etc.; 1 analog input module-A, which mainly receives temperature value, humidity value and 4-20ma signal; 2 485 communication modules-B, which communicate with 2 main boards for data transmission respectively; 2 CAN communication modules-B, which mainly realize communication with display screen and keyboard module for data transmission; 2 CAN bridges, which realize communication of modules with different baud rates; 1 24VDC power supply and 1 220VAC power supply, which mainly test whether the input and output of the above modules are normal and whether the voltage output is normal. The test signals include: DI, DO, AI, voltage signal, 485 signal, CAN communication, etc.

[0041] Connected to the multi-model multi-signal test box provided by the utility model, the CAN communication module of the main controller under test collects the digital input module (DI), digital output module (DO), analog input module (AI), CAN communication and voltage signals, and transmits the channel data of each module through the amp plugs XS1 and XS2. The 485 communication module transmits the channel data of each module through the amp plug XS3. When the data is sent normally, the display screen shows a green light.

Claims

1. A multi-model multi-signal test box, characterized in that: It includes a control module, a display module and a communication module. The control module is a PLC. The control module and the display module share a 24VDC power supply. The two use a CAN bus for communication. The communication module and the detection module are directly plugged into the back of the control module and communicate with the control module using EtherCAT. The communication module includes two CAN communication modules and three 485 communication modules, which are connected to the main controller to be tested through an amp plug.

2. The multi-model multi-signal test box according to claim 1, characterized in that: The display module is connected to a 7-inch touch screen for displaying signal test status, communication information, and fault display. Any one of the three main controllers to be tested can be selected by touching the buttons.

3. The multi-model multi-signal test box according to claim 1, characterized in that: The first CAN communication module of the communication module is connected to the amp plug CZ1, and performs CAN signal communication with the CAN communication module 1 of the main controller under test through the XS1 amp plug.

4. The multi-model multi-signal test box according to claim 1, characterized in that: The second CAN communication module of the communication module is connected to the amp plug CZ2, and performs CAN signal communication with the CAN communication module 2 of the main controller under test through the XS2 amp plug.

5. The multi-model multi-signal test box according to claim 1, characterized in that: The three 485 communication modules of the communication module are connected to the amp plug CZ3, and signal communication is performed with the three 485 communication modules of the main controller under test through the XS3 amp plug.

6. The multi-model multi-signal test box according to claim 1, characterized in that: It also includes a detection module, which serves as a tail end module and is hung at the end of other modules.

7. The multi-model multi-signal test box according to claim 1, characterized in that: The two CAN communication modules are used to collect the DI module, DO module, AI module, voltage signal, and CAN communication signal of the main controller under test, and the 485 communication module is used to collect the 485 signal and profibus signal of the main controller under test.

8. The multi-model multi-signal test box according to claim 1, characterized in that: The multi-model multi-signal test box and the main controller under test both use three 23-pin amp plugs.

9. The multi-model multi-signal test box according to claim 2, characterized in that: The display screen is used to display the channel information of each module, with a green light when normal and a red light when abnormal.

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