HMI display device integrated with input and output functions

Abstract

The utility model belongs to the technical field of environmental control cabinet equipment, and particularly relates to an HMI display device integrated with input and output functions, which comprises an HMI display device body, an HMI touch screen, an input interface, an output interface and a communication interface are arranged on the HMI display device body, a PLC control module is arranged in the HMI display device body, and the PLC control module is connected with the HMI touch screen. The PLC control module is respectively connected with the HMI touch screen, the input interface, the output interface and the communication interface; the input interface is used for receiving a switching value signal by connecting internal and external equipment of the environmental control cabinet so as to realize an input function of the environmental control cabinet; and the output interface is used for outputting an electric signal and driving the relay and / or the contactor to act to control the action of equipment in the environment control cabinet so as to realize an output function. According to the utility model, a PLC main body with a large volume is omitted, the PLC module is integrated in the HMI equipment, and the HMI equipment is embedded in the cabinet door, so that the space in the cabinet is greatly saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental control cabinet equipment, and in particular relates to an HMI display device with integrated input and output functions. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] HMI (Human Machine Interface) products are widely used in the field of industrial control. HMI is generally used in connection with PLC (Programmable logic Controller) to display and control the status and signals on the PLC.

[0004] like Figure 1 As shown, the HMI and PLC on the environmental control cabinet are currently split structures, that is, the HMI display screen is usually embedded in the cabinet door of the environmental control cabinet, and the PLC system is set in the cabinet. The PLC system interacts with the equipment in the cabinet, and the HMI display screen and the PLC system communicate with each other. The PLC is responsible for processing data and the HMI is responsible for displaying information.

[0005] However, in some compact cabinets, the installation of the PLC system in the cabinet may cause problems such as inconvenient wiring and insufficient space. Moreover, the existing environmental control cabinets have a single control mode and do not integrate multiple control modes, and do not have the function of flexibly switching between multiple control modes. Utility Model Content

[0006] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides an HMI display device with integrated input and output functions.

[0007] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0008] The utility model provides an HMI display device with integrated input and output functions, comprising: an HMI display device body, on which an HMI touch screen, an input interface, an output interface and a communication interface are arranged, and a PLC control module is arranged inside the HMI display device body, and the PLC control module is respectively connected to the HMI touch screen, the input interface, the output interface and the communication interface;

[0009] The input interface is used to realize its input function by connecting to the internal and external devices of the environmental control cabinet to receive switch signals; the output interface is used to output electrical signals to drive relays and / or contactors to control the internal devices of the environmental control cabinet to realize its output function.

[0010] Furthermore, the input interface receives the start / stop switch signal of the environment control cabinet by connecting the conversion switch and the control switch;

[0011] The transfer switch includes a first transfer switch and a second transfer switch; the control switch includes a hand control box control switch, an environmental control cabinet control switch and a BAS control switch;

[0012] Contacts 1 and 3 of the first conversion switch are connected to the power supply, contact 2 is connected to the hand operation box control switch, and contact 4 is connected to contacts 1 and 3 of the second conversion switch; contacts 2 and 4 of the second conversion switch are connected to the environmental control cabinet control switch and the BAS control switch respectively.

[0013] Furthermore, the switch signal also includes a motor forward operation signal, a motor reverse operation signal, a soft start operation signal, a bypass operation signal, a soft start fault signal, a bearing winding alarm signal, a bearing winding tripping signal, an accident alarm signal, and a vibration alarm and tripping signal.

[0014] Further, the relays include forward operation relays, reverse operation relays, soft start-stop relays, bypass start, brake relays, fault alarm relays, remote / local status relays, and BAS / environmental control status relays;

[0015] The contactor includes a motor winding heating contactor.

[0016] Furthermore, the communication interface includes at least one of a PORT interface, an RJ45 interface and a USB interface.

[0017] Furthermore, a status indicator light is provided on the HMI display device body, and the status indicator light is connected to the PLC control module.

[0018] Furthermore, the status indicator light includes an input status indicator light and an output status indicator light.

[0019] Furthermore, a power module is also arranged inside the HMI display device body, and the HMI touch screen, PLC control module and status indicator light are respectively connected to the power module.

[0020] Furthermore, the status indicator light is arranged below the HMI touch screen.

[0021] Furthermore, the HMI display device is embedded in the door of the environmental control cabinet.

[0022] One or more of the above technical solutions have the following beneficial effects:

[0023] (1) The HMI display device provided by the utility model integrates the CPU module, input and output interface, input and output status indicator light in the PLC device with the HMI device, and the HMI display device is embedded in the cabinet door for installation, thereby eliminating the installation space of the bulky PLC main body, input and output module and power module. Compared with the independent arrangement of the PLC system and the HMI display screen, it can save space in the cabinet and omit the need for wiring, making the device more concise and convenient for wiring construction.

[0024] (2) The signal input interface of the HMI display device provided by the utility model is connected to three control switches through a switching switch, thereby realizing three-level control of the environmental control cabinet, namely, manual operation box control, environmental control cabinet control and BAS control, and defining the control priorities of the manual operation box, environmental control cabinet and BAS through specific pin connections, thereby realizing flexible switching of multiple control modes.

[0025] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0027] Figure 1 It is a working schematic diagram of a conventional HMI display device.

[0028] Figure 2 This is a working schematic diagram of an HMI display device with integrated input and output functions according to Example 1.

[0029] Figure 3 This is a front view of an HMI display device with integrated input and output functions according to Example 1.

[0030] Figure 4 This is a rear view of an HMI display device with integrated input and output functions according to Example 1.

[0031] (a) and (b) in FIG. 5 are both schematic diagrams of an HMI display device with integrated input and output functions according to Example 1.

[0032] In the figure, 1. HMI display device body, 2. HMI touch screen, 3. input status indicator light, 4. output status indicator light, 5. signal input interface, 6. signal output interface, 7. communication interface, 8. power interface. DETAILED DESCRIPTION

[0033] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0034] Embodiment 1

[0035] like Figure 1 to Figure 2 As shown, the utility model proposes an HMI display device with integrated input and output functions, including: an HMI display device body 1, on which an HMI touch screen 2, a signal input interface 5, a signal output interface 6 and a communication interface 7 are provided, and a PLC control module is provided inside the HMI display device body 1, and the PLC control module is respectively connected to the HMI touch screen, the signal input interface, the signal output interface and the communication interface; the PLC control module includes a microprocessor (CPU) and a memory, and the signal input interface, the signal output interface and the communication interface are all electrically connected to the microprocessor (CPU), and the CPU adopts Siemens SR40.

[0036] The signal input interface is used to realize its input function by connecting the HMI touch screen and the internal and external devices of the environmental control cabinet to receive the switch signal. The signal output interface is used to output the electrical signal to drive the relay and / or contactor to control the internal device of the environmental control cabinet to realize its output function. The wiring of the signal input interface and the signal output interface can be customized according to the equipment control requirements. The operation control of the environmental control cabinet is realized through key operation. At the same time, based on the HMI touch screen, the control signal can be transmitted to the PLC control module through the HMI touch screen to realize the control of the corresponding equipment.

[0037] The HMI display device with integrated input and output functions provided by the utility model receives and sends electrical signals by connecting the signal input and signal output interfaces with the internal and external devices of the environmental control cabinet through cables. The internal devices of the environmental control cabinet connected to the signal input and output interfaces include sensors, alarms, motors, fans, etc., and the external devices include switches on the hand operation box panel, switches of the BAS system, etc.; the PLC control module makes a logical judgment based on whether there is a signal input on the corresponding interface.

[0038] Among them, the input interface receives the start and stop switch signal of the environmental control cabinet by connecting the conversion switch and the control switch; the input interface receives the fault signal, alarm signal and trip signal by connecting the relay.

[0039] The transfer switch includes a first transfer switch and a second transfer switch; the control switch includes a hand control box control switch 1SB, an environmental control cabinet control switch 2SB and a BAS control switch ND;

[0040] Contact 1 and contact 3 of the first conversion switch are connected to the power supply, contact 2 is connected to the hand operation box control switch, and contact 4 is connected to contact 1 and contact 3 of the second conversion switch; contact 2 and contact 4 of the second conversion switch are respectively connected to the environmental control cabinet control switch and the BAS control switch; and the conversion switches include a forward switch, a reverse switch and a stop switch.

[0041] The utility model is schematically illustrated with a soft starter wiring, as shown in (a) and (b) of Figure 5, the signal input interface includes a DIa interface and a DIb interface, wherein the DIa interface includes: DIa:0, DIa:1, DIa:2, DIa:3, DIa:4, DIa:5, DIa:6, DIa:7; the DIb interface includes DIb:0, DIb:1, DIb:2, DIb:3, DIb:4, DIb:5, DIb:6, DIb:7; the signal output interface includes a DQa interface and a DQb interface, the DQa interface includes: DQa:0, DQa:1, DQa:2, DQa:3, DQa:4, DQa:5, DQa:6, DQa:7.

[0042] Specifically, the interface DIa:0 is connected to the contact 2 of the conversion switch 1SA of the hand operation box panel;

[0043] Interfaces DIa:1, DIa:2, DIa:3 are respectively connected to switches 1SB1, 1SB2, 1SB3, switches 2SB1, 2SB2, 2SB3 and switches ZND, FND, GND; the other ends of switches 1SB1, 1SB2, 1SB3 are all connected to contact 2 of transfer switch 1SA; the other ends of switches 2SB1, 2SB2, 2SB3 are all connected to contact 2 of transfer switch 2SA; switches ZND, FND, GND; the other ends are all connected to contact 4 of transfer switch 2SA; contact 1 of transfer switch 2SA is connected to contact 4 of transfer switch 1SA;

[0044] Among them, the corresponding buttons for forward start are: 1SB1, 2SB1, ZND; the corresponding buttons for reverse start are: 1SB2, 2SB2, FND; the corresponding buttons for stop button are: 1SBS, 2SBS, GND.

[0045] Interfaces DIa:4 and DIa:5 are connected to contact 2 and contact 4 of the conversion switch 2SA respectively;

[0046] Interfaces DIa:6, DIa:7 and interfaces DIb:0, DIb:1, DIb:2, DIb:3, DIb:4, DIb:5, DIb:6, DIb:7 are respectively connected to the contacts of the corresponding functional relays, including KA1, KA2, KA3, KA4 normally open contacts, KA5 normally closed contacts, KA6, KA7 normally open contacts, BAS normally open contacts, KA8 normally open contacts and KA9 normally open contacts;

[0047] Relay KA is a contactor (switch) that serves as a signal transmission device in a control circuit. After the normally open contact / normally closed contact of the relay is closed / opened, it receives corresponding switch quantity signals, including motor forward start signal, motor reverse start signal, soft start operation signal, bypass operation signal, soft start fault signal, bearing winding alarm signal, bearing winding trip signal, accident alarm signal and / or vibration alarm and trip signal.

[0048] The signal output interfaces DQa:0, DQa:1, DQa:2, DQa:3, DQa:4, DQa:6 and DQa:7 respectively correspond to the connected relays, including the forward operation relay 1KA, the reverse operation relay 2KA, the soft start-stop relay 3KA, the bypass start relay 4KA, the brake relay 5KA, the fault alarm relay 6KA, the remote / local status relay 7KA and the BAS / environmental control status relay 9KA; DQa:5 connects the contactor, including the motor winding heating contactor KMJR.

[0049] The environmental control cabinet of the utility model has three levels of control, namely, manual operation box control (local control), environmental control cabinet control and BAS control, and the priorities are, from high to low, the manual operation box, the environmental control cabinet and the BAS.

[0050] Among them, the hand operation box is a distribution box for local control, which is equipped with buttons such as run and stop, and is provided for the convenience of on-site control; the environmental control cabinet is the abbreviation of the environmental control cabinet, which is a distribution cabinet. The HMI display device with integrated input and output functions provided by the utility model is installed on the door of the environmental control cabinet; BAS is the host computer of the environmental control cabinet, which is an environment and equipment monitoring system (Building Automation System, BAS). The environmental control cabinet receives the control signal of BAS and executes it.

[0051] 1. Local control status (the switch 1SA on the hand control box panel is in the local position)

[0052] At this time, the hand operation box can operate the equipment with forward, reverse and stop commands, but the buttons on the door of the environmental control cabinet and BAS cannot control the equipment, that is, the operation is invalid;

[0053] 2. Control status of the environmental control cabinet (the switch 1SA on the hand control box panel is the remote position, and the switch 2SA on the environmental control cabinet is the environmental control position)

[0054] At this time, the buttons on the environmental control cabinet can be used to command the equipment to run forward, reverse, or stop. The buttons on the manual operation box door and BAS cannot control the equipment, meaning that the operation is invalid.

[0055] 3. BAS control status (the switch 1SA on the hand control box panel is the remote position, and the switch 2SA on the environmental control cabinet is the BAS position)

[0056] At this time, BAS can perform forward, reverse, and stop command operations on the equipment, but the buttons on the manual operation cabinet and environmental control cabinet door cannot control the equipment, that is, the operation is invalid.

[0057] As a further technical solution, the communication interface includes at least one of a PORT interface, an RJ45 interface and a USB interface. The communication interface and the PLC module are both part of the device hardware. The PLC module is responsible for running the program, and the communication interface is used to transmit data with external devices.

[0058] As a further technical solution, the HMI display device is embedded in the cabinet door of the environmental control cabinet, and a status indicator light is also provided on the HMI display device body. The status indicator light is arranged below the HMI touch screen, and the status indicator light is connected to the PLC control module. The status indicator light includes an input status indicator light and an output status indicator light.

[0059] The status indicator lights include an input status indicator light and an output status indicator light, which correspond to the signal input interface and the signal output interface respectively. The purpose of the status indicator lights is to indicate whether the current interface is inputting or outputting, which is convenient for operators to observe.

[0060] Furthermore, a power module is also arranged inside the HMI display device body, and the HMI touch screen, PLC control module and status indicator light are respectively connected to the power module. A power interface 8 is provided on the HMI display device body, and one end of the power interface 8 is connected to the power module, and the other end is connected to an external power supply device through a cable.

[0061] The working principle of the utility model is as follows: taking the start of the fan as an example, when the user presses the start button of the fan, the signal input interface receives the start signal of the fan, and the PLC control module determines whether there is a trip signal, whether there is a fault, the status signal of the brake relay, whether there is an accident alarm signal, etc. When all states are normal, the PLC control module issues a start command. After the command is issued, the corresponding signal output interface outputs an electrical signal to the forward operation relay to control the start of the fan, and at the same time displays the start of the fan on the HMI touch screen to inform the user that the fan has started.

[0062] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. An HMI display device with integrated input and output functions, characterized in that: include: An HMI display device body, wherein the HMI display device body is provided with an HMI touch screen, an input interface, an output interface and a communication interface, and a PLC control module is provided inside the HMI display device body, and the PLC control module is respectively connected to the HMI touch screen, the input interface, the output interface and the communication interface; The input interface is used to connect the internal and external devices of the environmental control cabinet to receive the switch signal to realize its input function; the output interface is used to output the electrical signal to drive the relay and / or contactor to control the internal device of the environmental control cabinet to realize its output function; The input interface receives the start / stop switch signal of the environment control cabinet by connecting the conversion switch and the control switch; The transfer switch includes a first transfer switch and a second transfer switch; the control switch includes a hand control box control switch, an environmental control cabinet control switch and a BAS control switch; Contacts 1 and 3 of the first conversion switch are connected to the power supply, contact 2 is connected to the hand operation box control switch, and contact 4 is connected to contacts 1 and 3 of the second conversion switch; contacts 2 and 4 of the second conversion switch are connected to the environmental control cabinet control switch and the BAS control switch respectively.

2. The HMI display device with integrated input and output functions according to claim 1, characterized in that: The switch quantity signals also include motor forward operation signal, motor reverse operation signal, soft start operation signal, bypass operation signal, soft start fault signal, bearing winding alarm signal, bearing winding tripping signal, accident alarm signal, and vibration alarm and tripping signal.

3. The HMI display device with integrated input and output functions according to claim 1, characterized in that: The relays include forward operation relay, reverse operation relay, soft start-stop relay, bypass start, brake relay, fault alarm relay, remote / local status relay and BAS / environmental control status relay; The contactor includes a motor winding heating contactor.

4. The HMI display device with integrated input and output functions according to claim 1, characterized in that: The communication interface includes at least one of a PORT interface, an RJ45 interface and a USB interface.

5. The HMI display device with integrated input and output functions according to claim 1, characterized in that: The HMI display device body is also provided with a status indicator light, and the status indicator light is connected to the PLC control module.

6. The HMI display device with integrated input and output functions according to claim 5, characterized in that: The status indicator lights include an input status indicator light and an output status indicator light.

7. The HMI display device with integrated input and output functions according to claim 5, characterized in that: A power module is also arranged inside the HMI display device body, and the HMI touch screen, PLC control module and status indicator light are respectively connected to the power module.

8. The HMI display device with integrated input and output functions according to claim 5, characterized in that: The status indicator light is arranged below the HMI touch screen.

9. The HMI display device with integrated input and output functions according to claim 1, characterized in that: The HMI display device is embedded in the cabinet door of the environmental control cabinet.

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