Factory electrical control system with optical communication function

Abstract

The utility model discloses a factory electrical control system with an optical communication function, which comprises an optical communication module, power distribution equipment, a field control box, electromechanical equipment and a PLC (Programmable Logic Controller), and is characterized in that the power distribution equipment, the field control box and the PLC are all connected with the optical communication module; the optical communication module is used for realizing signal transmission among the power distribution equipment, the field control box and the PLC; and the electromechanical equipment is connected with the power distribution equipment through an electrical hard wiring. According to the utility model, external DI / DO is converted into bus information to be transmitted through optical fibers, wiring of an electrical control system of a factory is simplified, a large number of external cables are saved, and the requirements of energy conservation and low consumption are met.

Description

Technical Field

[0001] This utility model relates to the field of factory automation control, and in particular to a factory electrical control system with optical communication function. Background Technology

[0002] Currently, electrical operation of factory equipment generally adopts a dual-location operation mode: local operation at the equipment site and remote monitoring from the control center. Some equipment also requires remote electrical control from upstream or downstream processes that are geographically distant due to safety requirements of upstream or downstream processes. Currently, the power distribution panels and PLC control cabinets of the equipment used for these controls in factories all use DI / DO hardwiring, which has the following drawbacks:

[0003] 1) Factories typically have a large number of devices, and when using DI / DO hard-wiring, a large number of control cables are required, resulting in complex cable laying and high costs. Figure 1 (As shown); when the external control circuit fails, it is difficult to diagnose and repair the fault; in addition, when the electrical control system is upgraded or changed in the future, the design needs to be changed, the wiring terminals of the control box need to be added again (generally the manufacturer needs to make on-site modifications) and cables need to be laid, and the equipment needs to be installed on-site. The power distribution panel is generally concentrated in the power distribution room, which is far away, resulting in difficulties in technical upgrades and high costs.

[0004] 2) Due to the large number of equipment in the factory, some of which are frequency converter controlled, the factory is a complex electromagnetic harmonic environment. Harmonics can easily be conducted into the control system through electrical hard wiring, generating electromagnetic harmonic interference and affecting the control and operation of the equipment.

[0005] Sometimes, due to process requirements, remote control needs to be performed at an upstream or downstream process that is far from the existing process. However, if the distance exceeds 300m, line loss and interference may cause the electrical equipment to malfunction, reducing the reliability of electrical control. Utility Model Content

[0006] This invention provides a factory electrical control system with optical communication capabilities to solve the technical problems of complex cable laying and low reliability in existing electrical systems.

[0007] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:

[0008] The utility model relates to a factory electrical control system with optical communication function, including: optical communication module, distribution equipment, field control box, electromechanical device and PLC, distribution equipment, field control box, PLC all are connected with optical communication module, optical communication module is used for realizing signal transmission between distribution equipment, field control box, PLC three, electromechanical device is connected through electrical hardwiring between distribution equipment.

[0009] Preferably, the optical communication module includes a microprocessor, a fiber optic communication interface, a power module, a first digital channel, and a second digital channel. The microprocessor is connected to the fiber optic communication interface, the first digital channel, and the second digital channel. The first digital channel is used to connect the distribution equipment. The second digital channel is used to connect the field control box. The fiber optic communication interface is used to establish communication with the PLC.

[0010] Preferably, the distribution equipment includes a distribution panel. The optical communication module further includes a relay driver and a digital input / output interface. The first digital channel is connected to the relay driver. The relay driver is connected to the digital input / output interface. The digital input / output interface is used to connect the distribution panel.

[0011] Preferably, the field control box includes field control box buttons. The second digital channel is connected to the field control box buttons.

[0012] Preferably, an Ethernet optical switch is further included. The fiber optic communication interface is connected to the PLC through the Ethernet optical switch.

[0013] Preferably, the distribution panel corresponds to a plurality of electromechanical devices. Each electromechanical device is equipped with a field control box. The plurality of electromechanical devices corresponding to the distribution panel are connected to the distribution panel through electrical hardwiring. The plurality of field control boxes corresponding to the distribution panel are connected to the distribution panel through optical fibers.

[0014] Preferably, the PLC corresponds to a plurality of distribution panels. The plurality of distribution panels corresponding to the PLC are connected to the PLC through an Ethernet optical switch.

[0015] Preferably, the PLC is further connected to a PC station through a second switch.

[0016] Preferably, the PC station corresponds to a plurality of PLCs. The plurality of distribution panels corresponding to the PC station are connected to the PC station through a second optical switch.

[0017] Preferably, the PC station includes a PC operation station and a PC engineer station.

[0018] The utility model has the following beneficial effects:

[0019] 1、The utility model discloses a outside DI / DO is converted into bus information through optical fiber transmission, has simplified the wiring of factory electrical control system, has saved a large amount of external cable, meets the requirement of energy saving and low consumption.In addition, adopt optical fiber communication, save the bridge, and the construction is simple.When the line fails, the fault diagnosis and maintenance are convenient, when the technological transformation upgrades, utilizes the original optical fiber, does not need to lay the line again.Adopting optical fiber transmission, the influence of the complex electromagnetic harmonic interference of factory is not received, and transmission and control are stable and reliable.When the remote control is carried out in the superior process or the subordinate process place that the distance of existing process is far, the problem that the original electrical hardwiring mode is restricted by distance is solved.

[0020] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further explained in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings that form a part of this application are intended to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0022] Figure 1 It is the basic principle diagram of the field and remote distance remote control of single equipment in prior art;

[0023] Figure 2 It is the basic principle diagram of the field and remote distance remote control of single equipment in the preferred embodiment of the utility model;

[0024] Figure 3 It is the principle block diagram of optical communication module device in the preferred embodiment of the utility model;

[0025] Figure 4 It is the flow chart of 50ms timer in the preferred embodiment of the utility model;

[0026] Figure 5 It is the CAN bus receiving processing flow chart in the preferred embodiment of the utility model;

[0027] Figure 6 It is the factory electrical control system with optical communication function in the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0028] The embodiment of the utility model will be explained in detail below in combination with the drawings, but the utility model can be implemented in multiple different ways limited and covered by the claims.

[0029] Embodiment one:

[0030] As Figure 2As shown, the utility model provides a kind of factory electrical control system with optical communication function, the system changes the mode of traditional DI / DO electrical hardwiring of factory equipment control, the module device is arranged in factory distribution screen, equipment, so that factory distribution screen is converted from original DI / DO electrical hardwiring to optical fiber communication transmission, can save cable, equipment control is not disturbed by electromagnetic harmonic, and not restricted by distance, can effectively solve the problem in above-mentioned factory electrical control.

[0031] As Figure 3 As shown, the optical communication module in the utility model needs to have +5V DI / DO interface, collects DI information of +5V operation button of control box, and outputs DO information such as control box indicator light.Optical communication module needs to have 220V DI / DO interface, for input collection and output control with 220V AC inside distribution screen.Optical communication module has Ethernet interface and CAN communication interface, DI / DO collection method is set in CPU microcontroller software, and DI / DO information is converted into CAN bus, Ethernet communication processing.Optical communication module has optical fiber conversion chip, and CAN bus, Ethernet communication interface is converted into optical signal interface.

[0032] In the utility model, optical communication module collects external DI / DO information and converts into bus information and is transmitted through optical fiber, so that only one optical communication line is needed between distribution screen and field operation box in distribution room and between distribution screen in distribution room and superior PLC control cabinet, to greatly simplify wiring of factory electrical control system, improve anti-interference of electrical transmission, and meet the demand of remote control.

[0033] Power line and signal line of the optical communication module are transmitted through optical fiber, internally adopt CPU microcontroller, have CAN, Ethernet communication interface, and are converted into optical signal interface through optical fiber conversion chip.The module device has +5V DI, DO interface and 220V input, output interface.+5V DI, DO interface is used to collect the selection state of the start, closure or switch of external collection (+5V) button;220V DI, 220V DO are used to collect external 220V DI / DO information, wherein 220V DI can collect the opening, closure state of contactor, relay or external PLC passive node inside distribution screen, and 220V DO is used to drive contactor, intermediate relay coil and other equipment inside distribution screen.

[0034] In the utility model, CPU microcontroller is internally provided with 3 standard program modules: 50ms timer processing program, CAN bus processing program and Ethernet processing program.

[0035] 1) 50ms timer processing program

[0036] The main is to 50ms cycle timing query the state of each DI input, according to the detected DI state, the main contactor closed variable assignment 0 or 1, and then send the variable value through the CAN bus, mainly complete the +5V DI / DO collection. Will I / O module device in, the 50ms timer processing program is mainly used to detect the start, close state of the external button, according to the logic of the software set to determine whether the main contactor needs to be closed or disconnected, and the corresponding assignment of the closing variable, such as Figure 4

[0037] 2) CAN bus processing program

[0038] The received CAN bus data packet is parsed, if the main contactor closing variable value is 1, then drive 220V DO output, the main contactor is closed, otherwise the main contactor is disconnected, mainly complete the collection and drive of 220V DI / DO. Therefore, will I / O module device in the distribution screen, the program is mainly used to receive and send CAN bus information of the distribution screen, and the information is parsed to drive the closing or opening of the main contactor, so as to connect or disconnect the main power supply for mechanical and electrical equipment, such as Figure 5

[0039] 3) Ethernet processing program

[0040] Similar to the CAN bus processing program, when the PC operation single station or PC engineer station is remotely operated, the PLC program sets the PLC control variable to 1, and sends it to the distribution screen through Ethernet. When the distribution screen receives the Ethernet data packet, the PLC control variable value in the data packet is parsed: when the value is 1, the I / O module drives the 220V DO output, and the main contactor is closed; when the value is 0, the I / O module will not drive the 220V DO output, and the main contactor remains in the open state.

[0041] The above optical communication module is respectively assembled in and the distribution screen, and the external DI / DO information is collected and converted into bus information and sent through optical fiber. As Figure 6 ​​As shown, Y11…Y1k, Ym1…Ymk are respectively main power distribution power cables of power distribution panel (power supply) AP1, AP2 to electromechanical equipment; optical fiber communication is adopted between power distribution panel AP and control box AC, replacing original numerous electrical hard-wired control cables; optical fiber communication is adopted between power distribution panel AP and upper PLC. By using this electrical control mode, only power supply of workshop electromechanical equipment adopts electrical cable, and all the rest of control cables adopt bus optical fiber communication mode. Therefore, the electrical system control scheme converts original control lines between devices from electrical hard-wiring to optical fiber communication mode, firstly saving investment cost, simplifying factory wiring, reducing the complexity of cable laying and installation, facilitating daily maintenance and fault diagnosis, and for future possible technical upgrading, without changing control box design and laying control lines again, directly using optical communication module to expand I / O collection; secondly, optical fiber communication uses optical fiber as transmission medium, since optical fiber transmits optical signal, and optical signal is not affected by electromagnetic interference, therefore, the control system has good anti-interference ability.

[0042] In summary, the utility model discloses that the external DI / DO is converted into bus information and is transmitted through optical fiber, simplifies the wiring of factory electrical control system, saves a large amount of external cable, and meets the energy-saving and low-consumption requirements of existing green mines and energy-saving mines.In addition, optical fiber communication is adopted, saving bridge, and simple construction.When a line fault occurs, fault diagnosis and maintenance are convenient, and when technical improvement is upgraded, the original optical fiber is used, and there is no need to lay a line again.Optical fiber transmission is not affected by complex electromagnetic harmonic interference of the factory, and transmission and control are stable and reliable.When the upper process or the lower process far away from the existing process is controlled remotely, the problem of distance limitation of the original electrical hard-wiring mode is solved.

[0043] The above only describes preferred embodiments of the utility model and is not used to limit the utility model, and for those skilled in the art, the utility model can have various changes and variations.Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A factory electrical control system with optical communication function, characterized by, The application relates to an optical communication module, a power distribution device, a field control box, a mechanical and electrical device and a PLC, wherein the power distribution device, the field control box and the PLC are connected with the optical communication module, the optical communication module is used for realizing signal transmission among the power distribution device, the field control box and the PLC, and the mechanical and electrical device is connected with the power distribution device through electrical hard wiring. The optical communication module comprises a microprocessor, an optical fiber communication interface, a power module, a first digital channel and a second digital channel, the microprocessor is connected with the optical fiber communication interface, the first digital channel and the second digital channel, the first digital channel is used for connecting the power distribution device, the second digital channel is used for connecting the field control box, and the optical fiber communication interface is used for establishing communication with the PLC.

2. The factory electrical control system with optical communication function according to claim 1, characterized in that, The power distribution device comprises a power distribution screen, the optical communication module further comprises a relay driver and a digital input and output interface, the first digital channel is connected with the relay driver, the relay driver is connected with the digital input and output interface, and the digital input and output interface is used for connecting the power distribution screen.

3. The factory electrical control system with optical communication function according to claim 2, characterized in that, The field control box comprises a field control box button, and the second digital channel is connected with the field control box button.

4. The factory electrical control system with optical communication function according to claim 2, characterized in that, An Ethernet optical switch is further arranged, and the optical fiber communication interface is connected with the PLC through the Ethernet optical switch.

5. The factory electrical control system with optical communication function according to claim 2, characterized in that, The power distribution screen is correspondingly provided with a plurality of mechanical and electrical devices, each mechanical and electrical device is provided with a field control box, the plurality of mechanical and electrical devices corresponding to the power distribution screen are connected with the power distribution screen through electrical hard wiring, and the plurality of field control boxes corresponding to the power distribution screen are connected with the power distribution screen through optical fibers.

6. The factory electrical control system with optical communication function according to claim 3, characterized by The PLC is correspondingly provided with a plurality of power distribution screens, and the plurality of power distribution screens corresponding to the PLC are connected with the PLC through Ethernet optical switches.

7. The factory electrical control system with optical communication function according to claim 6, characterized by The PLC is further connected with a PC station through a second switch.

8. The factory electrical control system with optical communication function according to claim 7, characterized by The PC station is correspondingly provided with a plurality of PLCs, and the plurality of power distribution screens corresponding to the PC station are connected with the PC station through second optical switches.

9. The factory electrical control system with optical communication function according to claim 8, characterized by The PC station comprises a PC operation station and a PC engineer station.

10. The factory electrical control system with optical communication function according to claim 9, characterized by ​

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