Analog quantity output module of small industrial controller

Abstract

The embodiment of the utility model provides an analog quantity output module of a small industrial controller. The analog quantity output module comprises a CPU processing unit, an expansion module, an output unit and a backboard bus terminal, the backboard bus terminal comprises a first expansion port and a second expansion port, the expansion module comprises a first expansion module and a second expansion module, the first expansion port is selectively and detachably connected with the first expansion module, and the second expansion port is selectively and detachably connected with the second expansion module; the input end of the CPU processing unit is a first expansion port, and the output end of the CPU processing unit is connected with the output unit and / or is connected with the second expansion module through a second expansion port. Through the arrangement of the embodiment of the invention, the analog quantity output module of the small industrial controller is powerful in function, flexible in networking, convenient to construct and high in field adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of controllers, and particularly relates to a small industrial controller analog quantity output module. BACKGROUND

[0002] The controller usually has the functions of acquisition, transmission and processing of field information. With the rapid development of computer technology, the proposal of industry 4.0 and the improvement of intelligent degree, some application scenarios need to process video, image and other information, and also need to perform complex logic control and wireless transmission and high-speed transmission of data. The requirement of AI processing and edge computing in the industrial field is also higher and higher. Real-time data processing and high intelligence have become important resources in this era. The product not only needs to realize closed-loop control of the system, but also should know the running state and fault of the system, and perform real-time monitoring and recording on the system, and can perform pre-fault prompt, record, query and analyze the data of after-sales and maintenance, and realize remote management of the equipment.

[0003] In the related art, the small industrial controller commonly used in the industrial field can complete the acquisition, processing and data transmission of digital and analog quantities in the industrial field.

[0004] However, most of the existing small industrial controllers have complex structures and single functions, which makes it difficult to build an industrial field system and meet special application requirements in the field. CONTENT OF THE INVENTION

[0005] The embodiment of the present application provides a small industrial controller analog quantity output module in an industrial controller system capable of meeting the above special requirements, so as to solve the technical problem that the small industrial controller has a complex structure and single function in the related art, and makes it difficult for the small industrial controller to build an industrial field system and meet special application requirements in the field.

[0006] The embodiment of the present application provides a small industrial controller analog quantity output module, which comprises a CPU processing unit, an expansion module, an output unit and a backplane bus terminal.

[0007] The backplane bus terminal comprises a first expansion port and a second expansion port, the expansion module comprises a first expansion module and a second expansion module, the first expansion port is selectively and detachably connected with the first expansion module, and the second expansion port is selectively and detachably connected with the second expansion module.

[0008] The input end of the CPU processing unit is the first expansion port, the output end of the CPU processing unit is connected to the output unit, and / or is connected to the second expansion module via the second expansion port, and the CPU processing unit is further configured to collect external information input by its input end and / or the first expansion module, and output the external information to the output unit;

[0009] The output unit is configured to receive external information output by the CPU processing unit, and output the external information to an external device to achieve control of the external device.

[0010] In a feasible implementation, the first expansion module is set as a controller CPU module or another expansion module directly or indirectly connected to the controller CPU module, and the controller CPU module is configured to output configuration parameters, expansion protocols and power supply to the CPU processing unit through the backplane bus terminal.

[0011] In one feasible implementation, the output unit includes an isolation circuit and a DAC digital-to-analog conversion circuit, the input end of the isolation circuit is connected to the output end of the CPU processing unit via an inter-board connector, and the output end of the isolation circuit is connected to the input end of the DAC digital-to-analog conversion circuit, so that the digital signal is unidirectionally output to the DAC digital-to-analog conversion circuit;

[0012] The output end of the DAC digital-to-analog conversion circuit is connected to an external device, and the DAC digital-to-analog conversion circuit is configured to convert a digital signal into a voltage signal.

[0013] In a feasible implementation, the output unit further includes at least one output channel, an input end of the output channel is connected to an output end of the DAC digital-to-analog conversion circuit, and the other end of the output channel is connected to an external device;

[0014] The output channel includes a first circuit and a second circuit. The first circuit is configured as a voltage amplification circuit, and the second circuit is configured as a current modulation circuit.

[0015] In a feasible implementation, the industrial controller further includes a housing, wherein the housing forms a receiving cavity;

[0016] The CPU processing unit is provided as a CPU board, and the surface of the CPU board is provided with an MCU chip and an inter-board connector;

[0017] The industrial controller further includes an IO interface board, the IO interface board includes an output unit, and the IO interface board is connected to the CPU board via a CPU inter-board connector;

[0018] The CPU board and the IO interface board are arranged side by side in the vertical direction in the accommodating cavity.

[0019] In a feasible implementation, an internal power converter is provided on the surface of the CPU board facing away from the IO interface board, and the internal power converter is configured to convert the power input from the first expansion port and output it to the MCU chip, peripheral circuits and output units.

[0020] In a feasible implementation, the surface of the CPU board is also provided with a clock circuit, a reset circuit, a download port, a system indicator light, and a backplane communication interface;

[0021] Wherein, the clock circuit is configured to provide an external clock to the MCU chip;

[0022] The reset circuit is configured to power on the CPU board and monitor the power supply;

[0023] The download port is configured for firmware download, debugging and upgrading;

[0024] The system indicator light is configured to indicate the working status of the CPU processing unit;

[0025] The backplane communication interface is configured as a hard-wired interface between the CPU board and the expansion module.

[0026] In a feasible implementation, the analog output module of the small industrial controller further includes a connector terminal detachably connected thereto, and the connector terminal is used for connection with an external device and for supplying power with an on-site 24V power supply.

[0027] The embodiment of the present application provides an analog output module for a small industrial controller. The embodiment of the present application connects the modules detachably via a backplane bus, facilitating flexible configuration of the modules. Furthermore, the present application enables the CPU processing unit to selectively connect to a first expansion module and a second expansion module, thereby enabling the first expansion module and the second expansion module to be configured according to the specific needs of the external device, and configuring the specific parameters of the first expansion module and the second expansion module via the controller CPU module. In other words, the system can be built according to the specific needs of the external devices on the industrial site, thereby improving on-site adaptability. Through the configuration of the embodiment of the present application, a small industrial controller analog output module is provided that is powerful, flexible in networking, easy to build, and highly adaptable to the field. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 This is a system framework diagram of an analog output module for a small industrial controller provided by one embodiment of the present application;

[0030] Figure 2 This is a structural diagram of a CPU board and an IO interface board of an analog output module of a small industrial controller provided in one embodiment of the present application.

[0031] Description of reference numerals:

[0032] 100-housing; 200-CPU board; 300-IO interface board;

[0033] 210 - MCU chip; 220 - internal power converter; 230 - clock circuit; 240 - reset circuit; 250 - download port; 260 - system indicator light; 271 - left expansion port; 272 - right expansion port;

[0034] 310- isolation circuit; 320- DAC digital-to-analog conversion circuit;

[0035] 410 - first expansion module; 420 - second expansion module. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0037] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific implementation methods disclosed below.

[0038] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on this application. In this application, unless otherwise expressly specified and limited, a first feature being "up" or "down" a second feature may be when the first and second features are in direct contact, or when the first and second features are in indirect contact through an intermediate medium.

[0039] In this application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. However, it is noted that direct connection means that the connection between the two main bodies does not form a connection relationship through an excessive structure, but is connected to form a whole through a connection structure. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0040] In this application, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features.

[0041] The controller usually has the functions of acquisition, transmission, processing and the like of field information. With the rapid development of computer technology, the proposal of industry 4.0 and the improvement of intelligent degree, some application scenarios not only need to process video, image and the like information, but also need to perform complex logic control and wireless transmission and high-speed transmission of data, and the requirements of industrial field for AI processing and edge side calculation are also higher and higher. Real-time data processing and high intelligence become important resources in this era. The product not only needs to realize closed-loop control of the system, but also should know the running state and fault of the system, and perform real-time monitoring and recording on the system, can perform pre-fault prompt, record, query and analyze the data of the entire after-sales and maintenance, and realize remote management of the equipment.

[0042] In the related art, the various modules configured by the small industrial controller commonly used in the industrial field can complete the acquisition, processing and data transmission of digital and analog quantities in the industrial field.

[0043] However, most of the existing small industrial controllers have complex structure and single function, which makes it difficult for the small industrial controller to build industrial field system and meet special application requirements in the field.

[0044] Therefore, the embodiment of the present application provides a small industrial controller analog output module to solve the technical problem that the small industrial controller in the related art has complex structure and single function, which makes the small industrial controller difficult to build industrial field system and meet special application requirements in the field.

[0045] Figure 1 It is a system framework diagram of a small industrial controller analog output module provided by an embodiment of the present application.

[0046] The embodiment of the application provides a small industrial controller analog output module, referring to Figure 1 , comprising a CPU processing unit, an expansion module, an output unit and a backplane bus terminal;

[0047] The backplane bus terminal comprises a first expansion port and a second expansion port, the expansion module comprises a first expansion module 410 and a second expansion module 420, the first expansion port is selectively and detachably connected with the first expansion module 410, and the second expansion port is selectively and detachably connected with the second expansion module 420.

[0048] The input end of the CPU processing unit is the first expansion port, the output end of the CPU processing unit is connected with the output unit, and / or is connected with the second expansion module through the second expansion port, the CPU processing unit is further configured to collect external information input by the first expansion module 410 at the input end, and output the external information to the output unit.

[0049] The output unit is configured to receive the external information output by the CPU processing unit, and output the external information to an external device to realize control on the external device.

[0050] For example, the first expansion port can be connected with the first expansion module 410, the first expansion port of the CPU processing unit can not be connected with the first expansion module 410, and the first expansion port of the CPU processing unit can be connected with different first expansion modules 410 according to specific requirements of an industrial field. Similarly, the second expansion port of the CPU processing unit can be connected with the second expansion module 420, the second expansion port of the CPU processing unit can not be connected with the second expansion module 420, and the second expansion port of the CPU processing unit can be connected with different second expansion modules 420 according to specific requirements of the industrial field.

[0051] Further, the first expansion module 410 and the first expansion port, and the second expansion module 420 and the second expansion port can adopt a hard connection mode, and the field wiring terminals on the IO interface board 300 can adopt pluggable wiring terminals, so that when the modules are replaced in the industrial field, the modules can be replaced only by plugging and / or unplugging the expansion terminals and the field wiring terminals, which is simple and convenient, and can avoid complex repeated wiring and prevent miswiring.

[0052] For example, the input end first expansion port of the CPU processing unit can be connected with the first expansion module 410 according to specific requirements of an industrial field, the first expansion module 410 can be set as a controller CPU module or another expansion module directly or indirectly connected with the controller CPU module. The output of the CPU processing unit can be connected with the output unit, and the output end of the output unit is connected with an external device.

[0053] For example, the output unit can be connected to a light bulb of an external device, and the light bulb can adjust its brightness according to the external information output by the output unit.

[0054] It should be noted that the first expansion module 410 can be a controller CPU module, the first expansion module 410 can also be another analog output module, the first expansion module 410 can also be other expansion modules of different types, the second expansion module 420 can be another analog output module, the second expansion module 420 can also be other expansion modules of different types, for example, different types of expansion modules can be digital input and / or output modules, analog input modules or ProfibusDP communication modules, etc.

[0055] It should be further explained that the external devices in this application are a general term for external devices in industrial sites. For example, external devices are composed of sensors, light bulbs, motors and other components. Different units of the analog output module of a small industrial controller have different functions, and the specific components in the external devices connected to them are also different.

[0056] From the above description, it can be seen that this solution achieves the following technical effects:

[0057] The embodiment of the present application provides a small industrial controller analog output module. The embodiment of the present application connects the modules detachably via a backplane bus, facilitating flexible configuration of the modules. Furthermore, the present application selectively connects the CPU processing unit to the first expansion module 410 and selectively connects to the second expansion module 420, thereby enabling the first expansion module 410 and the second expansion module 420 to be configured according to the specific needs of the external device, and configuring the specific parameters of the first expansion module 410 and the second expansion module 420 via the controller CPU module. In other words, the system can be built according to the specific needs of the external devices on the industrial site, thereby improving on-site adaptability. Through the configuration of the embodiment of the present application, a small industrial controller analog output module with powerful functions, flexible networking, easy construction, and strong on-site adaptability is provided.

[0058] In some examples, the first expansion module is configured as a controller CPU module, and the controller CPU module is configured to output configuration parameters, expansion protocols, and power to the CPU processing unit.

[0059] In the specific implementation, the parameters of the analog output module of the small industrial controller do not need to be configured, and the user can configure the analog parameters of each module, such as the analog type and the analog range, on the programming software. After the controller CPU module and the expansion module are connected and powered on, the program is compiled and downloaded, and the controller CPU module automatically transmits the configuration parameters to the CPU processing unit and the output unit through the backplane bus. Further, the controller CPU module in the embodiment of the application not only supports the backplane bus, but also supports the expansion protocol independently developed.

[0060] Through the setting of the controller CPU module, the configuration parameters can be output to the analog output module of the small industrial controller, and the configuration parameters of each unit can be set according to the specific needs of the external device, which has high adaptability in the field and is convenient for system building.

[0061] In some examples, the output unit includes an isolation circuit 310 and a DAC digital-to-analog conversion circuit 320. The input end of the isolation circuit 310 is connected to the output end of the CPU processing unit through the inter-board connector. The output end of the isolation circuit 310 is connected to the input end of the DAC digital-to-analog conversion circuit 320, so that the digital signal is unidirectionally output to the DAC digital-to-analog conversion circuit 320.

[0062] The output end of the DAC digital-to-analog conversion circuit 320 is connected to the external device. The DAC digital-to-analog conversion circuit 320 is configured to convert the digital signal into a voltage signal. After the voltage signal is amplified or current-modulated, an analog signal is output to control the external device.

[0063] Through the setting of the isolation circuit 310, the digital signal analyzed and processed by the CPU processing unit can be isolated on the system side and the industrial field side, so as to avoid the interference signal of the external device on the industrial field side from being input to the analog output module of the small industrial controller, thereby protecting the analog output module of the small industrial controller. Through the setting of the DAC digital-to-analog conversion circuit 320, the digital signal can be converted into a voltage signal that can be received by the external device, so as to control the external device.

[0064] For example, the output unit further includes at least one output channel. The input end of the output channel is connected to the output end of the DAC digital-to-analog conversion circuit 320, and the other end of the output channel is connected to the external device.

[0065] The output channel includes a first circuit and a second circuit. The first circuit is configured as a voltage amplification circuit, and the second circuit is configured as a current modulation circuit.

[0066] For example, the DAC chip is a high-precision low-power 4-channel voltage output digital-to-analog conversion chip of TI.

[0067] Exemplarily, four output channels can be set. After the digital signal output by the isolation circuit 310 passes through the DAC digital-to-analog conversion circuit 320, the DAC digital-to-analog conversion module outputs a small-signal voltage signal to the four output channels. The small-signal voltage signal outputs a 0-5V DC / 0-10V DC voltage signal through the voltage amplification circuit, or the small-signal voltage signal outputs a 0-20mA / 4-20mA current signal through the current modulation circuit, thereby completing the output of the analog quantity.

[0068] The embodiment of the present application can realize the output of multiple control signals by setting at least one output channel. The embodiment of the present application can realize both voltage signal control of external devices and current signal control of external devices by setting the output channel to the first circuit or the second circuit.

[0069] Figure 2 1 is a structural diagram of a CPU board 200 and an IO interface board 300 of an analog output module of a small industrial controller provided in one embodiment of the present application.

[0070] In other examples, refer to Figure 2 , the small industrial controller analog output module further includes a housing 100, and the housing 100 forms a receiving cavity;

[0071] The CPU processing unit is provided as a CPU board 200, and an MCU chip 210 and a CPU board connector are provided on the surface of the CPU board 200;

[0072] The industrial controller further includes an IO interface board 300, which includes an output unit and is connected to the CPU board 200 via a CPU inter-board connector;

[0073] The CPU board 200 and the IO interface board 300 are arranged side by side in a vertical direction in the accommodation cavity.

[0074] For example, the housing 100 may be a housing 100 with a customized open mold or a public mold structure.

[0075] For example, each module can be fixed, and the upper and lower shells 100 can be fixed by snap fastening. Furthermore, the shell 100 can be made of fire-retardant, heat-resistant and impact-resistant materials, and the protection level can be set to IP20 to adapt to various complex environments in industrial sites.

[0076] The embodiment of the present application utilizes the housing 100 to dispose the MCU chip 210 on the CPU board 200, dispose the inter-CPU board 200 connector and the output unit on the IO interface board 300, and both the CPU board 200 and the IO interface board 300 are disposed within the accommodating cavity, thereby providing protection for the MCU chip 210, the CPU board 200, the inter-CPU board connector, the IO interface board 300, the output unit, etc. Furthermore, arranging the CPU board 200 and the IO interface board 300 vertically side by side within the accommodating cavity can save space and improve the compactness of the analog output module of the small industrial controller.

[0077] Exemplarily, an internal power converter 220 is provided on the surface of the CPU board 200 facing away from the IO interface board 300. The internal power converter is configured to convert the power input from the first expansion port and output it to the MCU chip 210 and the peripheral circuits and output units.

[0078] In the embodiment of the present application, an internal power converter 220 is arranged on the surface of the CPU board 200 facing away from the IO interface board 300, and the CPU board 200 and the IO interface board 300 are arranged side by side in the vertical direction within the accommodating cavity, thereby facilitating the internal power converter 220 to supply power to the MCU chip 210 and peripheral circuits, output units, etc.

[0079] In some other examples, the surface of the CPU board 200 is further provided with a clock circuit 230, a reset circuit 240, a download port 250, a system indicator light 260, and a backplane communication interface;

[0080] The clock circuit 230 is configured to provide an external clock to the MCU chip 210;

[0081] The reset circuit 240 is configured to power on the CPU board 200 and monitor the power supply;

[0082] Download port 250 is configured for firmware download, debugging and upgrading;

[0083] The system indicator light 260 is configured to indicate the working status of the CPU processing unit;

[0084] The backplane communication interface is configured as a hard-wired interface between the CPU board 200 and the expansion modules.

[0085] Exemplarily, the backplane communication interface includes a first expansion interface 271 and a second expansion interface 272, wherein the first expansion interface 271 is set as a pin socket and the second expansion interface 272 is set as a hole socket. The pin socket and the hole socket can be used to connect the backplane communication signal line, station address signal line, power signal line, etc.

[0086] In some examples, the small industrial controller analog output module further includes a wiring terminal detachably connected thereto, the wiring terminal being used for connection to an external device and for supplying power to an on-site 24V power supply.

[0087] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0088] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A small industrial controller analog output module, characterized in that: include: CPU processing unit, expansion modules, output units and backplane bus terminals; The backplane bus terminal includes a first expansion port and a second expansion port, and the expansion module includes a first expansion module and a second expansion module, the first expansion port is selectively and detachably connected to the first expansion module, and the second expansion port is selectively and detachably connected to the second expansion module; The input end of the CPU processing unit is the first expansion port, the output end of the CPU processing unit is connected to the output unit, and / or is connected to the second expansion module via the second expansion port, and the CPU processing unit is configured to collect external information input from its input end and / or the first expansion module, convert the external information into a digital signal, and output it to the output unit; The output unit is configured to receive external information output by the CPU processing unit, and output the external information to an external device to control the external device.

2. The analog output module of a small industrial controller according to claim 1, characterized in that: The first expansion module is configured as a controller CPU module or another expansion module directly or indirectly connected to the controller CPU module. The controller CPU module is configured to output configuration parameters, expansion protocols, and power to the CPU processing unit through a backplane bus terminal.

3. The analog output module of a small industrial controller according to claim 1, characterized in that: The output unit includes an isolation circuit and a DAC digital-to-analog conversion circuit, wherein the input end of the isolation circuit is connected to the output end of the CPU processing unit, and the output end of the isolation circuit is connected to the input end of the DAC digital-to-analog conversion circuit, so that the digital signal is unidirectionally output to the DAC digital-to-analog conversion circuit; An output end of the DAC digital-to-analog conversion circuit is connected to an external device, and the DAC digital-to-analog conversion circuit is configured to convert the digital signal into a voltage signal.

4. The analog output module for a small industrial controller according to claim 3, characterized in that: The output unit further comprises at least one output channel, an input end of the output channel is connected to the output end of the DAC digital-to-analog conversion circuit, and the other end of the output channel is connected to the external device; The output channel includes a first circuit and a second circuit, the first circuit is configured as a voltage amplification circuit, and the second circuit is configured as a current modulation circuit.

5. The analog output module for a small industrial controller according to any one of claims 2 to 4, characterized in that: The industrial controller further includes a housing, wherein the housing forms a receiving cavity; The CPU processing unit is configured as a CPU board, and an MCU chip and an inter-board connector are provided on the surface of the CPU board; The industrial controller analog output module further includes an IO interface board, the IO interface board includes the output unit, and the IO interface board is connected to the CPU board via the CPU inter-board connector; Wherein, the CPU board and the IO interface board are arranged side by side in the vertical direction in the accommodating cavity.

6. The analog output module for a small industrial controller according to claim 5, characterized in that: An internal power converter is provided on the surface of the CPU board facing away from the IO interface board. The internal power converter is configured to convert the power input from the first expansion port and output it to the MCU chip, the peripheral circuit and the output unit.

7. The analog output module for a small industrial controller according to claim 6, characterized in that: The surface of the CPU board is also provided with a clock circuit, a reset circuit, a download port, a system indicator light and a backplane communication interface; Wherein, the clock circuit is configured to provide an external clock to the MCU chip; The reset circuit is configured to power on the CPU board for reset and power monitoring; The download port is configured for firmware downloading, debugging and upgrading; The system indicator light is configured to indicate the working status of the CPU processing unit; The backplane communication interface is configured as a hard-connected interface between the CPU board and the expansion module.

8. The analog output module for a small industrial controller according to any one of claims 2 to 4, characterized in that: The small industrial controller analog output module further comprises a connector terminal detachably connected thereto, wherein the connector terminal is used for connecting to the external device and supplying power to an on-site 24V power supply.

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