CN210442679U - Air brake control system based on PLC and data bus technology - Google Patents
Air brake control system based on PLC and data bus technology Download PDFInfo
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- CN210442679U CN210442679U CN201921722020.4U CN201921722020U CN210442679U CN 210442679 U CN210442679 U CN 210442679U CN 201921722020 U CN201921722020 U CN 201921722020U CN 210442679 U CN210442679 U CN 210442679U
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Abstract
The utility model discloses an air brake control system based on PLC and data bus technology, including both ends connect respectively in the data bus of PLC host processor and PLC standby processor, still connect through redundant high-speed data synchronization bus between PLC host processor and the PLC standby processor, data bus and redundant high-speed data synchronization bus form the annular; the data bus is connected with a plurality of PLC communication modules in series, each PLC communication module is connected with one PLC I/O module, and each PLC I/O module is connected with a button box with a switch and a switch indicator and an air brake actuator connected with an air brake; the utility model has the advantages of simple structure, high reliability, small equipment volume, less cable usage, strong expansion capability and the like.
Description
Technical Field
The invention relates to an air brake control system, in particular to an air brake control system based on a PLC and a data bus technology.
Background
The air brake is an important control element of the ventilation system of the ship and the marine platform, is arranged on an air pipe, and can cut off an air source according to the operation requirement of the system or the fire condition. Traditional air brake control system uses the relay to build control circuit, realizes functions such as local/remote control, emergent closing, opening/closing feedback of air brake, though the relay has technical maturity, low cost's characteristics, but leads to air brake control system's shortcoming also very obvious thereupon: 1) the control boxes are large in number and large in size, and suitable positions on the ship and the marine platform are difficult to find for installation; 2) a large number of cables are needed to transmit air brake monitoring signals, and the use amount and construction amount of the cables are increased; 3) the control circuit is rigid, and system upgrading and expansion are not convenient.
Disclosure of Invention
The invention aims to provide a novel air brake control system based on a PLC and a data bus technology.
In order to achieve the purpose, the invention adopts the following technical scheme:
a kind of air brake control system based on PLC and data bus technology, including both ends connect to PLC host processor and data bus of PLC standby processor separately, still connect through the synchronous bus of redundant high-speed data between PLC host processor and PLC standby processor, the data bus forms the ring with the synchronous bus of redundant high-speed data; the data bus is connected with a plurality of PLC communication modules in series, each PLC communication module is connected to a plurality of PLC I/O modules, each PLC I/O module is connected to a plurality of execution devices, and each execution device comprises a button box with a switch and a switch indicator and an air brake actuator connected to an air brake.
Preferably, two redundant high-speed data synchronous buses are arranged, and two ends of each redundant high-speed data synchronous bus are connected to the PLC main processor and the PLC standby processor.
Preferably, the PLC main processor and the PLC standby processor are further connected to a remote workstation through a redundant ethernet network, respectively.
Preferably, two redundant Ethernet networks are arranged, wherein one redundant Ethernet network is connected with the PLC main processor and a remote workstation; another redundant ethernet network is connected to the PLC standby processor and to another remote workstation.
The invention has the advantages that:
(1) the invention has the advantages of simple structure, clear and simple structure and easy application, and the invention has three-level structure of an upper computer, a PLC and a field actuator.
(2) The reliability is high, the PLC CPU (including the main processor and the standby processor) and the data bus are in a redundant design, and the normal operation of the system cannot be influenced by any single-point failure. And the PLC is a mature electronic control element, the technology is reliable, and the failure rate is low.
(3) The equipment is small in size, the PLC is small and exquisite and compact, the size of the PLC control box is only equal to 1/2 of the size of the relay control box, and arrangement and installation are facilitated.
(4) The cable is used a little, and data bus only needs a communication cable, does not use traditional control cable, and very big saving cable use amount reduces the cable and draws and put the construction volume.
(5) The expansion capability is strong, the PLC I/O module can be flexibly selected according to the number and the position of the air brakes, all the air brake control logic functions are processed in the PLC CPU, software can be modified according to actual requirements to adjust the control logic, and any hardware modification is not involved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
In the figure, 3, redundant Ethernet, 4, redundant high-speed data synchronous bus, 5, data bus, 6, air brake actuator, 7, button box, 8 and remote workstation.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the present invention includes a PLC main processor, a PLC standby processor, a PLC I/O module and communication module, a redundant ethernet 3, a redundant high-speed data synchronization bus 4, a data bus 5, a damper actuator 6, a button box 7, and a remote workstation 8. The PLC chip is designed in a redundant mode and is divided into a main processor and a standby processor, the main processor and the standby processor are connected through a redundant high-speed data synchronous bus 4, all air brake monitoring data can be shared in real time, and if the main processor fails, the main processor is automatically switched to the standby processor.
All PLC communication modules are connected in series by a data bus 5, and a PLC I/O module is connected to the PLC communication modules. One end of the data bus 5 is connected to the PLC main processor, the other end of the data bus is connected to the PLC standby processor, a ring topology structure is formed through the redundant high-speed data synchronization bus 4, and any fault of any point of the data bus 5 cannot influence the air brake monitoring function; the PLC I/O module is connected with the air brake actuator 6 and the button box 7 and is used for collecting air brake opening and closing feedback signals and controlling the opening and closing of the air brake, and the local monitoring of the air brake can be realized by using the button box 7; meanwhile, the remote workstation 8 is connected with the PLC main processor through the redundant Ethernet 3, and an operator can monitor the opening and closing state of the air brake and send an instruction for opening and closing the air brake on the remote workstation 8.
The method comprises the following steps:
1) the local operation mode is as follows:
an operator uses the button box 7 to send an air brake opening/closing instruction, the instruction is sent to the PLC main processor through the data bus 5 for data processing after being collected by the PLC I/O module, then is sent back to the PLC I/O module, and finally is sent to the air brake actuator 6, so that the air brake opening/closing function is realized, and the emergency closing of the air brake can be executed according to the same principle.
The air brake actuator 6 feeds back an air brake opening/closing state signal to the PLC I/O module, the signal is processed by the data bus 5 and the PLC main processor and then is sent back to the PLC I/O module, and finally is sent to an indicator lamp of the button box 7, so that local indication of the air brake opening/closing state is achieved.
2) Remote operation mode:
an operator sends an air brake opening/closing instruction on the remote workstation 8, and the instruction passes through the redundant Ethernet 3, the PLC main processor, the data bus 5 and the PLC I/O module in sequence and is finally sent to the air brake actuator 6 to realize the air brake opening/closing function.
The air brake actuator 6 feeds back an air brake opening/closing state signal to the PLC I/O module, and the signal passes through the data bus 5, the PLC main processor and the redundant Ethernet 3 in sequence and is finally displayed on the remote workstation 8.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (4)
1. A damper control system based on PLC and data bus technology is characterized by comprising data buses, wherein two ends of each data bus are respectively connected with a PLC main processor and a PLC standby processor, the PLC main processor and the PLC standby processor are also connected through a redundant high-speed data synchronous bus, and the data buses and the redundant high-speed data synchronous bus form a ring; the data bus is connected with a plurality of PLC communication modules in series, each PLC communication module is connected to a plurality of PLC I/O modules, each PLC I/O module is connected to a plurality of execution devices, and each execution device comprises a button box with a switch and a switch indicator and an air brake actuator connected to an air brake.
2. The PLC and data bus technology based air brake control system as recited in claim 1, wherein two redundant high-speed data synchronization buses are provided, and both ends of each redundant high-speed data synchronization bus are connected to the PLC main processor and the PLC standby processor.
3. The PLC and data bus technology based damper control system of claim 1, wherein the PLC main processor and the PLC standby processor are further connected to a remote workstation through a redundant ethernet network, respectively.
4. The PLC and data bus technology based damper control system of claim 3, wherein the redundant ethernet is provided in two pieces, wherein one of the redundant ethernet connects the PLC main processor and a remote workstation; another of the redundant ethernet networks is connected to the PLC standby processor and another remote workstation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921722020.4U CN210442679U (en) | 2019-10-15 | 2019-10-15 | Air brake control system based on PLC and data bus technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921722020.4U CN210442679U (en) | 2019-10-15 | 2019-10-15 | Air brake control system based on PLC and data bus technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111708316A (en) * | 2020-06-17 | 2020-09-25 | 浙江省机电设计研究院有限公司 | A PLC industrial automation control system |
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- 2019-10-15 CN CN201921722020.4U patent/CN210442679U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111708316A (en) * | 2020-06-17 | 2020-09-25 | 浙江省机电设计研究院有限公司 | A PLC industrial automation control system |
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