Multi-mode control system and control method applicable to large-scale systems

Abstract

The present invention discloses a multi-mode control system and a control method thereof which can be used for a large-scale system, comprising a local information processing module, a communication unit, a host computer, a local cabinet button switch control circuit unit, a relay unit and a system power supply control circuit; the control system of the present invention can switch to three control modes, namely, a local mode, a remote mode and a debugging mode, according to the specific requirements of the on-site working conditions; the switching of the three control modes enables the control system to meet the different requirements for control in various stages of equipment debugging, remote control and operation, and at the same time realizes closed-loop control of the controlled devices of the equipment, thereby ensuring the stability of equipment startup, improving the integration, and being applicable and extended to applications in many control fields.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial control systems and control methods, and in particular relates to a multi-mode control system and a control method thereof that can be used for large-scale systems. Background Art

[0002] During the experiment, it is usually chosen to use a control device or implement control of large equipment, and to collect signals from limit points to determine the status of the equipment and ensure the closed loop of the control system. Existing control devices or control systems usually only have one control mode and cannot switch to different applicable control modes according to the specific needs of the on-site working conditions. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies of the prior art and to provide a multi-mode control system and a control method thereof that can be used in large-scale systems.

[0004] The present invention is achieved through the following technical solutions:

[0005] A multi-mode control system that can be used for large-scale systems, comprising a local information processing module, a communication unit, a host computer, a local cabinet button switch control circuit unit, a relay unit and a system power supply control circuit;

[0006] The system has the following control modes: local mode, remote mode and debug mode;

[0007] In the local mode, the circuit unit is controlled by the button switch of the local cabinet, and the electrical signal is input to the local information processing module. The local information processing module outputs the corresponding control signal to the corresponding relay in the relay unit according to the input signal. After the relay is energized, the circuit corresponding to the system power control circuit is energized to realize the control of the switching quantity of the corresponding equipment unit in the industrial site. After the corresponding equipment unit is opened in place, a limit signal is generated, and the limit signal is transmitted to the corresponding relay through the signal line. After the relay is actuated to light up the corresponding indicator light, the feedback signal continues to be transmitted to the local information processing module, thereby realizing the closed-loop control of the equipment system;

[0008] In remote mode, the control of the field equipment unit is realized through the virtual control button in the remote host configuration software. The control signal of the host computer is transmitted to the local information processing module through the communication unit, and then the local information processing module outputs the control signal to the corresponding relay in the relay unit. After the relay is energized, the circuit corresponding to the system power control circuit is energized to realize the control of the switching quantity of the corresponding equipment unit in the industrial field. After the corresponding equipment unit is opened in place, a limit signal is generated, which is transmitted to the corresponding relay through the signal line. The relay action makes the corresponding indicator light up, and the feedback signal will be transmitted back to the local information processing module. After the local information processing module processes the signal, it transmits the signal to the host computer and the touch screen. At the same time, the state quantity of the corresponding equipment unit is displayed on the display of the host computer and the touch screen, thereby realizing remote closed-loop control of the field equipment system;

[0009] In debugging mode, the circuit unit is controlled by the local cabinet button switch to directly control the corresponding relay in the relay unit. After the corresponding relay is energized, the circuit corresponding to the system power control circuit is energized to realize the control of the switching quantity of the corresponding equipment unit in the industrial site. After the corresponding equipment unit is opened in place, a limit signal is generated, which is transmitted to the corresponding relay through the signal line. The relay is activated to light up the corresponding indicator light, thereby realizing closed-loop control of the equipment.

[0010] In the above technical solution, the local information processing module adopts PLC, model is S7-1200.

[0011] In the above technical solution, the communication unit includes a switch, and the switch is connected to the host computer and the local information processing module through a network cable.

[0012] In the above technical solution, the system also includes a data acquisition unit, which is connected to the host computer. The data acquisition unit includes a vacuum gauge, a recorder, and an electronic instrument, which is used to collect data such as power supply voltage, current of key equipment units, and vacuum degree. The collected data will be transmitted to the host computer. The host computer stores the data, transmits it to the local information processing module through the communication unit, and then transmits the data to the touch screen.

[0013] In the above technical solution, the system power control circuit has a transformer unit, through which 380V industrial electricity is rectified into 220V control electricity.

[0014] In the above technical solution, the system also includes a low-voltage power supply module, which outputs a 24V power supply to provide low-voltage power to the local information processing module and the indicator light.

[0015] In the above technical solution, in the local mode, the local information processing module transmits the status information of the device unit to the host computer through the communication unit, so that the status information of the host computer and the local device unit are synchronized.

[0016] In the above technical solution, in the local mode, the local information processing module transmits the status information of the device unit to the touch screen through the communication unit for display.

[0017] The advantages and beneficial effects of the present invention are:

[0018] The control system of the present invention has three control modes, namely, local mode, remote mode and debugging mode. Switching between the three control modes enables the control system to meet different control requirements for equipment debugging, remote control and various operation stages. At the same time, closed-loop control is achieved for the controlled devices of the equipment, thus ensuring the stability of equipment startup, improving integration, and being applicable to many control fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an architectural diagram of a multi-mode control system of the present invention that can be used for large-scale systems.

[0020] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0022] like Figure 1 As shown, a multi-mode control system that can be used for large-scale systems includes a local information processing module (in this embodiment, the local information processing module adopts a PLC, model S7-1200), a switch, a host computer, a local cabinet button switch control circuit unit, a relay unit, a system power control circuit, a low-voltage power supply module and a data acquisition unit.

[0023] When in use, the control system of the present invention can be switched to different control modes according to the specific requirements of the on-site working conditions, including: local mode, remote mode and debugging mode.

[0024] When the equipment has been properly debugged and the test has entered the linkage test stage, it is suitable for local mode. In local mode, by operating the local cabinet button switch control circuit unit, the electrical signal is input to the local information processing module, and the local information processing module determines whether the input has an interlocking relationship with other signals that have been turned on. If there is no interlocking relationship, the local information processing module outputs the corresponding control signal to the corresponding relay in the relay unit. After the relay is energized, the circuit corresponding to the system power control circuit is energized to realize the control of the switching quantity of the corresponding equipment unit (such as a valve) at the industrial site. When the corresponding equipment unit receives the control signal, it opens. After opening in place, a limit signal is generated and transmitted to the corresponding relay through the signal line. After the relay operates to light up the corresponding indicator light, the feedback signal continues to be transmitted to the local information processing module, thereby realizing closed-loop control of the equipment.

[0025] When the test enters the operation test phase, the operator needs to complete the control and monitoring of the equipment in the control room and switch the mode to remote mode. In remote mode, the control of the field equipment system is realized through the virtual control button in the remote host configuration software. The control signal of the host computer is transmitted to the local information processing module through the Modbus TCP / IP protocol of the network cable through the switch. The local information processing module determines whether the input has an interlocking relationship with other signals that have been turned on. If there is no interlocking relationship, the local information processing module outputs a control signal to the corresponding relay. After the relay is energized, the circuit corresponding to the system power control circuit is energized to realize the control of the switch quantity of the corresponding equipment unit in the industrial field. When the corresponding equipment unit receives the control signal, it starts to open. After opening in place, a limit signal is generated and transmitted to the corresponding relay through the signal line. The relay action makes the corresponding indicator light up, indicating that the control has completed the closed loop. At the same time, the feedback signal will be transmitted back to the local information processing module. After the local information processing module processes the signal, it transmits the signal to the host computer and the touch screen. At the same time, the state quantity of the corresponding equipment unit is displayed on the monitor of the host computer and the touch screen, thereby realizing remote closed-loop control of the field equipment system.

[0026] During the initial adjustment of the equipment, due to the complex working conditions at the industrial site, each device needs to be debugged separately, so the mode needs to be switched to the debugging mode. In the debugging mode, the circuit unit is controlled by operating the local cabinet button switch. The electrical signal does not pass through the local information processing module, but is directly transmitted to the corresponding relay. In this way, the electrical signal will not be processed by the module, ensuring that the electrical signal can be transmitted to the corresponding equipment unit under any complex working conditions. After the equipment unit is turned on, the feedback signal will still be transmitted back to the relay of the corresponding indicator light and the local information processing module. When the local information processing module is uncontrollably damaged, the equipment unit can still be temporarily controlled and debugged, but the host computer and touch screen cannot display the status of the equipment unit. The equipment can only be judged by the indicator light to determine the equipment opening status, which also realizes the closed-loop control of the equipment.

[0027] The data acquisition unit includes a vacuum gauge, a recorder, an electronic instrument, etc., which is used to collect data such as power supply voltage, current of key equipment units, and vacuum degree. The collected data will be transmitted to the host computer. The host computer stores the data information, and then transmits it to the local information processing module through the Modbus TCP / IP protocol of the network cable through the switch, and then transmits the data to the touch screen.

[0028] Furthermore, since the equipment is powered by 380V, the system power control circuit has a transformer unit, through which the 380V industrial power is rectified into 220V control power.

[0029] Furthermore, the local information processing module and indicator light unit only need to be powered on at a safe low voltage, so a low-voltage power supply module is used to output a 24V power supply for low-voltage power supply. At the same time, high-voltage and low-voltage lines are distinguished in the cabinet to ensure that the lines are independent and do not interfere with each other.

[0030] Furthermore, in the local mode and the debugging mode, the status quantity of the device unit will be transmitted to the host computer through the communication unit, so that the status information of the host computer and the local device unit are synchronized.

[0031] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. A multi-mode control system that can be used for large-scale systems, characterized in that: It includes a local information processing module, a communication unit, a host computer, a local cabinet button switch control circuit unit, a relay unit and a system power supply control circuit; The communication unit includes a switch, which is connected to the host computer and the local information processing module through a network cable; The system has the following control modes: local mode, remote mode and debug mode; In the local mode, the circuit unit is controlled by the button switch of the local cabinet, and the electrical signal is input to the local information processing module. The local information processing module outputs the corresponding control signal to the corresponding relay in the relay unit according to the input signal. After the relay is energized, the circuit corresponding to the system power control circuit is energized to realize the control of the switching quantity of the corresponding equipment unit in the industrial site. After the corresponding equipment unit is opened in place, a limit signal is generated, and the limit signal is transmitted to the corresponding relay through the signal line. After the relay is actuated to light up the corresponding indicator light, the feedback signal continues to be transmitted to the local information processing module, thereby realizing the closed-loop control of the equipment system; In remote mode, the control of the field equipment unit is realized through the virtual control button in the remote host configuration software. The control signal of the host computer is transmitted to the local information processing module through the communication unit, and then the local information processing module outputs the control signal to the corresponding relay in the relay unit. After the relay is energized, the circuit corresponding to the system power control circuit is energized to realize the control of the switching quantity of the corresponding equipment unit in the industrial field. After the corresponding equipment unit is opened in place, a limit signal is generated, which is transmitted to the corresponding relay through the signal line. The relay action makes the corresponding indicator light up, and the feedback signal will be transmitted back to the local information processing module. After the local information processing module processes the signal, it transmits the signal to the host computer and the touch screen. At the same time, the state quantity of the corresponding equipment unit is displayed on the display of the host computer and the touch screen, thereby realizing remote closed-loop control of the field equipment system; In the debugging mode, the corresponding relay in the relay unit is directly controlled through the local cabinet button switch control circuit unit. After the corresponding relay is energized and actuated, the circuit corresponding to the system power control circuit is energized to realize the control of the switch quantity of the corresponding equipment unit in the industrial site. After the corresponding equipment unit is opened in place, a limit signal is generated, which is transmitted to the corresponding relay through the signal line. The relay actuates to light up the corresponding indicator light, thereby realizing the closed-loop control of the equipment. The local information processing module adopts PLC, model is S7-1200.

2. The multi-mode control system applicable to large-scale systems according to claim 1, characterized in that: The system also includes a data acquisition unit, which is connected to the host computer. The data acquisition unit includes a vacuum gauge, a recorder, and an electronic instrument for collecting power supply voltage, current of key equipment units, and vacuum degree data. The collected data will be transmitted to the host computer.

3. The multi-mode control system applicable to large-scale systems according to claim 2, characterized in that: The host computer stores the collected data, transmits it to the local information processing module through the communication unit, and then transmits the data to the touch screen.

4. The multi-mode control system applicable to large-scale systems according to claim 1, characterized in that: The system power supply control circuit has a transformer unit, through which 380V industrial power is rectified into 220V control power.

5. The multi-mode control system applicable to large-scale systems according to claim 1, characterized in that: The system also includes a low-voltage power supply module, which outputs a 24V power supply to provide low-voltage power to the local information processing module and indicator lights.

6. The multi-mode control system applicable to large-scale systems according to claim 1, characterized in that: In local mode, the local information processing module transmits the status information of the device unit to the host computer through the communication unit, so that the status information of the host computer and the local device unit are synchronized.

7. The multi-mode control system applicable to large-scale systems according to claim 6, characterized in that: In local mode, the local information processing module transmits the status information of the device unit to the touch screen through the communication unit for display.

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