Electrical equipment communication detection circuit

Abstract

The utility model discloses a communication detection circuit for electrical equipment. The circuit comprises a programmable logic controller, an interaction module, a detection end circuit and a power supply module, wherein the interaction module is connected with the switch, the switch is further connected with the programmable logic controller and the electrical equipment to be detected, the programmable logic controller is further connected with the detection end circuit, and the detection end circuit is further connected with the electrical equipment to be detected. According to the scheme, the detection wiring of the detection circuit is connected with the wiring terminal of the to-be-detected electrical equipment, the detection circuit can automatically send and receive communication data of the to-be-detected electrical equipment and make and break the digital output port of the to-be-detected electrical equipment, and the detection efficiency and accuracy are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment detection, and particularly relates to an electrical equipment communication detection circuit. Background Art

[0002] In electrical equipment, it is often necessary to detect the communication functions of electrical equipment, such as CAN communication, Modbus RTU communication, and Modbus TCP communication, to ensure the normal communication of electrical equipment. The communication detection of traditional electrical equipment is to connect the computer and the communication terminal of the electrical equipment through a communication line, and then detect through detection software on the computer, such as PCAN-View, Modbus poll, etc. This method also requires manual setting of parameters and data and sending them to the electrical equipment to check the status of the electrical equipment. The detection method for the digital output port is to send control data through communication to control the DO output, and use a multimeter to measure the on-off of the port. The existing methods are time-consuming and laborious, and the accuracy is not high.

[0003] Therefore, how to improve the efficiency and accuracy of electrical equipment communication detection is a technical problem to be solved by those skilled in the art. Content of the Utility Model

[0004] The purpose of the utility model is to solve the technical problems that the communication detection of electrical equipment in the prior art is time-consuming and laborious and has low accuracy. For this reason, the utility model provides an electrical equipment communication detection circuit, which includes:

[0005] A programmable logic controller, an interaction module, a detection terminal circuit, and a power supply module;

[0006] Among them, the interaction module is connected to a switch, and the switch is also respectively connected to the programmable logic controller and the electrical equipment to be detected. The programmable logic controller is also connected to the detection terminal circuit, and the detection terminal circuit is also connected to the electrical equipment to be detected.

[0007] Further, the programmable logic controller at least includes a first network cable port, a second network cable port, a first CAN communication port, a second CAN communication port, a first serial communication port, a second serial communication port, and 16 digital input ports. Among them, the first network cable port is connected to the switch, the second network cable port is connected to the equipment to be detected, and the first CAN communication port, the second CAN communication port, the first serial communication port, the second serial communication port, and the 16 digital input ports are all connected to the detection terminal circuit.

[0008] Further, the detection terminal circuit specifically includes a first connection terminal and a second connection terminal. One side of the first connection terminal is connected to the 16-channel digital input port of the programmable logic controller, and the other side of the first connection terminal is connected to the 16-channel digital output port of the electrical device to be detected. One side of the second connection terminal is respectively connected to the first CAN communication port, the second CAN communication port, the first serial communication port, and the second serial communication port of the programmable logic controller through shielded twisted pair wires, and the other side of the second connection terminal is respectively connected to the first CAN communication port, the second CAN communication port, the first serial communication port, and the second serial communication port of the electrical device to be detected through shielded twisted pair wires.

[0009] Further, resistors are connected in the shielded twisted pair wires at the first CAN communication port, the second CAN communication port, the first serial communication port, and the second serial communication port of the programmable logic controller.

[0010] Further, the detection circuit further includes a self-check module, and the self-check module includes:

[0011] The connection ports of the first self-check connection terminal are connected to the 16-channel digital input port of the programmable logic controller, and the connection ports of the first self-check connection terminal that are connected to the same-channel digital input port in the programmable logic controller are in a connected state;

[0012] The connection ports of the second self-check connection terminal are connected to the first CAN communication port, the second CAN communication port, the first serial communication port, and the second serial communication port of the programmable logic controller, and the connection ports of the second self-check connection terminal that are connected to the same-channel CAN communication port or serial communication port in the programmable logic controller are in a connected state.

[0013] Further, the power supply module is specifically a switching power supply. The input end of the switching power supply is externally powered, and the output end of the switching power supply is multiple 24V output ports, which are respectively connected to the programmable logic controller, the switch, and the interaction module.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] An electrical equipment communication detection circuit provided by the utility model, compared with the prior art, this circuit includes: a programmable logic controller, an interaction module, a detection terminal circuit and a power supply module; wherein, the interaction module is connected to a switch, and the switch is also respectively connected to the programmable logic controller and the electrical equipment to be detected. The programmable logic controller is also connected to the detection terminal circuit, and the detection terminal circuit is also connected to the electrical equipment to be detected. This solution connects the detection wiring of the detection circuit to the wiring terminal of the electrical equipment to be detected. This detection circuit can automatically send and receive the communication data of the electrical equipment to be detected and the on / off of the digital output port of the electrical equipment to be detected, greatly improving the detection efficiency; and this solution also includes a self-checking module, which can detect whether there is a fault in this circuit, prevent the detection result from being incorrect due to the damage of the detection circuit, and improve the accuracy of the detection result; when the self-check is abnormal, it can also give the fault abnormal point for easy repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of this specification, the following will briefly introduce the drawings required for the embodiments. The drawings described below are only some embodiments recorded in this specification. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The following shows the overall structural schematic diagram of the electrical equipment communication detection circuit provided by the embodiments of this specification;

[0018] Figure 2 The following shows the connection schematic diagram of the programmable logic controller in the embodiments of this specification;

[0019] Figure 3 The following shows the connection schematic diagram of the first wiring terminal -x2 of the detection terminal circuit in the embodiments of this specification;

[0020] Figure 4 The following shows the connection schematic diagram of the second wiring terminal -x1 of the detection terminal circuit in the embodiments of this specification;

[0021] Figure 5 The following shows the connection schematic diagram of the first self-checking wiring terminal -x4 of the self-checking module in the embodiments of this specification;

[0022] Figure 6 The following shows the connection schematic diagram of the second self-checking wiring terminal -x3 of the self-checking module in the embodiments of this specification;

[0023] Figure 7 The following shows the connection schematic diagram of the power supply module in the embodiments of this specification. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To enable those skilled in the art to better understand the technical solutions in this specification, the following will clearly and completely describe the technical solutions in the embodiments of this specification in conjunction with the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this specification.

[0025] As Figure 1 shown is a schematic structural diagram of an electrical equipment communication detection circuit provided by an embodiment of this specification. Although this specification provides the following embodiments or the structures shown in the accompanying drawings, based on routine or without creative efforts, more or fewer structures may be included in the described structure, and these structures are not limited to the structures shown in the embodiments or drawings of this specification. When the described structure is applied to an actual device or terminal product, it can be executed sequentially or in parallel according to the embodiments or module structures.

[0026] As Figure 1 shown, the electrical equipment communication detection circuit provided by an embodiment of this specification includes:

[0027] a programmable logic controller, an interaction module, a detection end circuit, and a power supply module;

[0028] Among them, the interaction module is connected to a switch, and the switch is also respectively connected to the programmable logic controller and the electrical equipment to be detected. The programmable logic controller is also connected to the detection end circuit, and the detection end circuit is also connected to the electrical equipment to be detected.

[0029] This solution connects the detection wiring of the detection circuit to the wiring terminal of the electrical equipment to be detected. This detection circuit can automatically send and receive the communication data of the electrical equipment to be detected and the on / off of the digital output port of the electrical equipment to be detected, greatly improving the detection efficiency.

[0030] In the embodiments of this application, as Figure 2 shown is a connection schematic diagram of the programmable logic controller. The programmable logic controller includes at least a first network cable port, a second network cable port, a first CAN communication port, a second CAN communication port, a first serial communication port, a second serial communication port, and 16 digital input ports. Among them, the first network cable port is connected to the switch, the second network cable port is connected to the equipment to be detected, and the first CAN communication port, the second CAN communication port, the first serial communication port, the second serial communication port, and the 16 digital input ports are all connected to the detection end circuit.

[0031] Specifically, the PLC module, i.e., the programmable logic controller, uses a Leisai MC500, which includes 2 CAN ports, 2 EtherNET network ports (i.e., network cable interfaces for Modbus TCP communication), 2 com ports (for Modbus RTU communication), and 16 DIs, i.e., 16 digital input ports.

[0032] The interaction module uses a touch screen display. The network port of the display is connected to a switch through a network cable (A0 - EtherNET / A1 - RJ45 - 3). The RJ45 - 2 network port of the switch is connected to the network port of the PLC through a network cable (MC500 - EtherNET0 / A1 - RJ45 - 2). The RJ45 - 4 network port of the switch is installed with a network cable and connected to the network port of the electrical equipment to be detected (A1 - RJ45 - 4 / RJ45 - 1). Through the switch, Modbus TCP communication is achieved among the display, the PLC, and the equipment to be tested, which is used to display the detection results and notify the PLC module of the "start tooling self - inspection instruction and start equipment detection instruction".

[0033] In the embodiment of the present application, the detection - end circuit specifically includes a first connection terminal and a second connection terminal. As Figure 3 shown in the connection schematic diagram of the first connection terminal - x2 of the detection - end circuit, Figure 4 shown in the connection schematic diagram of the second connection terminal - x1 of the detection - end circuit, one side of the first connection terminal is connected to the 16 digital input ports of the programmable logic controller, the other side of the first connection terminal is connected to the 16 digital output ports of the electrical equipment to be detected, one side of the second connection terminal is respectively connected to the first CAN communication port, the second CAN communication port, the first serial communication port, and the second serial communication port of the programmable logic controller through shielded twisted - pair wires, and the other side of the second connection terminal is respectively connected to the first CAN communication port, the second CAN communication port, the first serial communication port, and the second serial communication port of the electrical equipment to be detected through shielded twisted - pair wires.

[0034] Specifically, as Figure 3 and Figure 4 shown, one side of the second connection terminal is connected to the CAN port and the com port of the PLC module through shielded twisted - pair wires, and the other side is connected to the CAN port and the 485 port of the detection equipment through shielded twisted - pair wires, which is used to detect CAN communication and Modbus RTU communication (for example, the CAN0 communication line MC500 - CAN0 - CANH is connected to X1 - 2, and X1 - 2 is connected to the device). When the CAN communication and 485 communication of the detection circuit of the present application respectively receive and send data normally with the electrical equipment to be tested, it indicates that the CAN communication and 485 communication of the equipment to be tested are normal;

[0035] The Ethernet detection interface has one path connected to the EtherNET port of the PLC module through a network cable, and another path connected to the switch of the self-test module through a network cable. The other end of the network cable is connected to the network port of the detection device, which is used to detect Modbus TCP communication.

[0036] One side of the first wiring terminal is connected to the DI port of the PLC module, and the other side is connected to the DO port of the detection device, which is used to detect DO. When the detection circuit of this application sends data to the electrical device to be detected through communication, when the electrical device to be detected receives the data, it will control the corresponding digital quantity to close, and the DO is turned on. The 24V+ power signal is input to the DI port of the PLC module, so that it can be detected whether the DO port of the device to be tested is normal; (For the D1 port circuit, 24V+ is connected to the X2-1 port, X2-1 is connected to one end of the DO of the device to be tested, the other end of the DO of the device to be tested is connected to X2-2, and X2-2 is connected to the IN0 port of the PLC module.

[0037] Resistors are connected in the shielded twisted pair wires at the first CAN communication port, the second CAN communication port, the first serial communication port, and the second serial communication port of the programmable logic controller. The resistance of the resistor is 120 ohms, which is used to prevent communication interference.

[0038] In the embodiment of this application, the detection circuit further includes a self-test module, as Figure 5 shown is the connection schematic diagram of the first self-test wiring terminal - x4 of the self-test module, as Figure 6 shown is the second self-test wiring terminal - x3 of the self-test module. The self-test module includes:

[0039] The wiring ports of the first self-test wiring terminal are connected to the 16 digital input ports of the programmable logic controller. The wiring ports of the first self-test wiring terminal that are connected to the same digital input port of the programmable logic controller are in a connected state;

[0040] The wiring ports of the second self-test wiring terminal are connected to the first CAN communication port, the second CAN communication port, the first serial communication port, and the second serial communication port of the programmable logic controller. The wiring ports of the second self-test wiring terminal that are connected to the same CAN communication port or serial communication port of the programmable logic controller are in a connected state.

[0041] Specifically, when self-check is required, first, the PLC module is reliably connected to the two self-check wiring terminals. Through the self-check module, the two CAN ports, two com ports, and two EtherNET network ports of the PLC module are connected respectively to achieve communication with each other. Another path is used to detect the mutual check between circuit communications (CAN port self-check: For the CANH communication line, connect PLC-CAN0-CANH port to X1-2, X1-2 to X3-1, X3-1 to X3-2, X3-2 to X1-5, and X1-5 to PLC-CAN1-CANH port. For the CANL communication line, connect PLC-CAN0-CANL port to X1-3, X1-3 to X3-3, X3-3 to X3-4, X3-4 to X1-6, and X1-6 to PLC-CAN1-CANL port). When one path of communication sends data to the other path, and the other path of communication is normal, it indicates that the communication of the detection circuit is normal. For example, when CAN0 communication sends data to CAN1 communication, and CAN1 communication receives the data, it indicates that the CAN communication of the detection circuit is normal.

[0042] Short-circuit the DO port of the tooling through the self-check module (for example, DO1 port, 24V+ -> X2-1 -> X4-1 -> X4-2 -> X2-2 -> IN0 of the PLC). When the PLC module detects the input at the IN0 port, it indicates that the DO1 port of the tooling is detected normally;

[0043] The self-check process is as follows:

[0044] 1. Reliably connect the PLC module to the two self-check wiring terminals;

[0045] 2. Power on the detection circuit;

[0046] 3. Select start self-check on the display screen of the interaction module;

[0047] 4. If the self-check item is qualified, it is determined that the self-check item is qualified; if the self-check item is unqualified, repair the tooling according to the tooling fault prompt page;

[0048] 5. After the tooling is repaired, return to step 2 and perform the tooling self-check again until the self-check is qualified.

[0049] In the embodiment of the present application, the power module is specifically a switching power supply. As Figure 7 shown in the connection schematic diagram of the power module, the input end of the switching power supply is externally powered, and the output end of the switching power supply is multiple 24V output ports, which are respectively connected to the programmable logic controller, the switch, and the interaction module.

[0050] Specifically, the power supply module includes a switching power supply and a dual-purpose or triple-purpose plug connected to the L / N terminals of the switching power supply, which is used to supply power to the switching power supply, and the power supply range is AC100 - 240V; the 24V output terminal of the switching power supply is used to supply power to the PLC module, the interaction module, and the detection terminal circuit.

[0051] It should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time; when an element is referred to as "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. In addition, the "connection" used here may include a wireless connection; the phrase "and / or" includes any unit and all combinations of one or more related listed items.

[0052] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0053] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

[0054] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. An electrical equipment communication detection circuit, characterized in that: The circuit comprises: Programmable logic controller, interactive module, detection end circuit and power supply module; The interactive module is connected to a switch, and the switch is respectively connected to a programmable logic controller and an electrical device to be detected, and the programmable logic controller is also connected to a detection end circuit, and the detection end circuit is also connected to the electrical device to be detected.

2. The electrical equipment communication detection circuit according to claim 1, characterized in that: The programmable logic controller at least includes a first network cable port, a second network cable port, a first CAN communication port, a second CAN communication port, a first serial communication port, a second serial communication port, and 16 digital input ports, wherein the first network cable port is connected to the switch, the second network cable port is connected to the electrical equipment to be detected, and the first CAN communication port, the second CAN communication port, the first serial communication port, the second serial communication port, and the 16 digital input ports are all connected to the detection end circuit.

3. The electrical equipment communication detection circuit according to claim 2, characterized in that: The detection end circuit specifically includes a first wiring terminal and a second wiring terminal, one side of the first wiring terminal is connected to the 16-way digital input port of the programmable logic controller, the other side of the first wiring terminal is connected to the 16-way digital output port of the electrical equipment to be detected, one side of the second wiring terminal is connected to the first CAN communication port, the second CAN communication port, the first serial communication port and the second serial communication port of the programmable logic controller through a shielded twisted pair, and the other side of the second wiring terminal is connected to the first CAN communication port, the second CAN communication port, the first serial communication port and the second serial communication port of the electrical equipment to be detected through a shielded twisted pair.

4. The electrical equipment communication detection circuit according to claim 3, characterized in that: Resistors are connected to the shielded twisted pair cables at the first CAN communication port, the second CAN communication port, the first serial communication port and the second serial communication port of the programmable logic controller.

5. The electrical equipment communication detection circuit according to claim 1, characterized in that: The detection circuit also includes a self-test module, and the self-test module includes: The wiring port of the first self-test wiring terminal is connected to the 16-way digital input port of the programmable logic controller, and the wiring ports of the first self-test wiring terminal connected to the same digital input port of the programmable logic controller are in a connected state; The wiring ports of the second self-test wiring terminal are connected to the first CAN communication port, the second CAN communication port, the first serial communication port and the second serial communication port of the programmable logic controller, and the wiring ports in the second self-test wiring terminal connected to the same CAN communication port or serial communication port in the programmable logic controller are in a connected state.

6. The electrical equipment communication detection circuit according to claim 1, characterized in that: The power supply module is specifically a switching power supply, the input end of the switching power supply is external power supply, and the output end of the switching power supply is a plurality of 24V output ports, which are respectively connected to the programmable logic controller, the switch and the interactive module.

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