CN2814220Y - Inter-double main machines switching communicating device with inter secondary machines in data communication - Google Patents
Inter-double main machines switching communicating device with inter secondary machines in data communication Download PDFInfo
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- CN2814220Y CN2814220Y CN 200520061179 CN200520061179U CN2814220Y CN 2814220 Y CN2814220 Y CN 2814220Y CN 200520061179 CN200520061179 CN 200520061179 CN 200520061179 U CN200520061179 U CN 200520061179U CN 2814220 Y CN2814220 Y CN 2814220Y
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Abstract
The utility model relates to an inter-double main machines switching communicating device with inter secondary machines in data communication including a first communication main machine, a second communication main machine and a communication secondary machine. The utility model is characterized in that: a switching circuit is added among the first communication main machine, the second communication main machine and the communication secondary machine; the communication interfaces of the first communication main machine, the second communication main machine and the communication secondary machine are all connected to the switching circuit, and the second communication main machine controls the switching circuit by a controlling interface; in default state, the second communication main machine controls the switching circuit through the controlling interface to cause the communication interface of the first communication main machine to be connected with the communication interface of the communication secondary machine and the communication interface of the second communication main machine is caused to be disconnected with the communication interface of the communication secondary machine; when the second communication main machine is needed to communicate with the communication secondary machine, the second communication main machine controls the switching circuit through the controlling interface to cause the communication interface of the second communication main machine to be connected with the communication interface of the communication secondary machine and the communication interface of the first communication main machine is disconnected with the communication interface of the communication secondary machine. The device can effectively avoid the conflict of the communication between the two communication main machines and the communication secondary machine.
Description
Affiliated technical field
The utility model relate in a kind of data communication switch between two main frames and slave between communicator, especially a kind of at RS-232, switch between two main frames in the RS-485 communication and slave between communicator.
Background technology
RS-232, RS-485 are widely used data communication interface standards.Full-duplex communication is carried out in RS-232 communication wherein between two communication equipments, be point-to-point communication mode.RS-485 supports single host, the communication mode of many slaves.These interface standards are not directly supported twin-engined communication mode.As not using special device, when two main frames and slave communicate, conflict will appear.But in actual applications, tend to relate to the situation that switching is communicated by letter with slave between two main frames.For example, at present national energy-intensive situation, the part communication base station has been installed intelligent ventilation energy-saving system, cooperate the intelligent air condition work of communication base station, regulate model parameter and effectively reduce the air-conditioning work time by adjusting base station intelligent ventilation energy-saving system intelligence, when reducing noxious gas emission, saving air conditioning electricity, prolong air-conditioning service life.These communication base stations had often been installed dynamic environment monitoring system originally, and intelligent air condition communicates as slave and dynamic environment monitoring system.Generally speaking, communication interface is RS-232, RS-485.After introducing the base station intelligent ventilation energy-saving system, the base station intelligent ventilation energy-saving system also will communicate with intelligent air condition.If intelligent ventilation energy-saving system and dynamic environment monitoring system do not add the port that intelligent air condition is received in switching simultaneously, then can cause conflict.Must use a kind of switching device shifter to coordinate two cover systems and use the communication base station intelligent air condition jointly.
Summary of the invention
The purpose of this utility model is the communication contention aware problem in a twin-engined communication system.When first communication host, second communication main frame all will communicate with slave, between first communication host, second communication main frame, insert a commutation circuit, commutation circuit can be used relay circuit, the communication slave can be switched to below first communication host, also can switch to below the second communication main frame, but can not be connected to first communication host simultaneously and the second communication main frame causes conflict.First communication host is connected and communicates with the communication slave under the default situations, when the second communication main frame will communicate with the slave of communicating by letter, switched to the second communication main frame and be connected by the second communication host computer control commutation circuit slave of will communicating by letter, then the second communication main frame can communicate with the slave of communicating by letter.Communicate by letter with slave is ongoing in order to make this handoff procedure not interrupt first communication host, the second communication main frame can have the interface of intercepting, and switches after signal on the order wire is judged first communication host and once communicating by letter of slave finished fully by intercepting again.The utility model is mainly used in RS-232, and the Interface for digital communication of RS-485 also is applicable on other the Interface for digital communication.
Description of drawings
Fig. 1 represent to switch between two main frames and slave between the communicating devices block diagram;
Fig. 2 represent to switch between two main frames and slave between the schematic diagram of communicating devices.
The specific embodiment
With reference to Fig. 1, first communication host, the second communication main frame, the communication interface 11,21,41 of communication slave is all received in the commutation circuit, and the control interface 23 of second communication main frame is received commutation circuit, the action of control commutation circuit; By default, commutation circuit directly is connected the communication interface 11 of first communication host with the communication interface 41 of communication slave, and at this time the communication interface 21 of second communication main frame disconnects with the communication interface of the slave of communicating by letter; When communication slave 2 will be connected with the slave of communicating by letter, by control interface 23 control commutation circuits, the communication interface 21 of second communication main frame directly is connected with the communication interface 41 of communication slave, and at this time the communication interface 11 of first communication host disconnects with the communication interface of the slave of communicating by letter.For fear of the communication interface 11 of first communication host and 41 ongoing communication disruption of communication interface of the slave of communicating by letter, communication principal and subordinate machine 2 can also connect one and intercept interface 22 in commutation circuit, whether 41 of the communication interface 11 of intercepting first communication host and the communication interfaces of the slave of communicating by letter ongoing communication, and the second communication main frame switches when intercepting less than signal of communication again.
Fig. 2 is the schematic diagram of a specific embodiment of the present utility model.The communication interface P2 that comprises first communication host, the communication interface P3 of second communication main frame, the communication interface P4 of communication slave, second communication HCI P1 and relay K 1, the positive pole of second communication HCI P1 is received relay K 1 control end by resistance R 1, and negative pole is directly received another control end of relay K 1.At the control end of relay and meet an earial drainage diode D1, the positive pole of earial drainage diode D1 connects the negative pole of second communication HCI P1.The communication interface P4 of communication slave succeeds the common of electrical equipment, the communication interface P3 of the communication interface P2 of first communication host, second communication main frame succeeds other two groups of contacts of electrical equipment respectively, at ordinary times, second communication HCI P1 makes the common of relay and the communication interface P2 conducting of first communication host, and the communication interface P3 of the common of relay and second communication main frame disconnects; When the second communication main frame need be communicated by letter with the slave of communicating by letter, then second communication HCI P1 made the common of relay and the communication interface P3 conducting of second communication main frame, and the communication interface P2 of the common of relay and first communication host disconnects; In order to intercept communicating by letter of first communication host and slave, on circuit, can increase by two wire jumper JP1, JP2, when communication interface is RS232, only needs the receiving terminal of the communication interface P3 of second communication main frame received by wire jumper on the transmitting terminal of communication interface P4 of the transmitting terminal of communication interface P2 of first communication host or communication slave and get final product; When communication interface is RS485, two wire jumper JP1, JP2 are jumped onto, make the common of relay and the communication interface P2 conducting of first communication host at second communication HCI P1, when the communication interface P3 of the common of relay and second communication main frame disconnected, the communication interface P3 of second communication main frame is in accepting state can be intercepted.The relay is here selected the type of DPDT for use, and each group contact has two, is the situation of RS485 to communication interface, because order wire is 2 lines, 3 groups of lines correspondence respectively are connected to and respectively organize on the contact; To communication interface is the situation of RS232, and the reception line of each communication interface and transmission line are received on the contact, and ground wire directly connects.
Claims (3)
1. switch between two main frames in the data communication and slave between communicator, comprise first communication host (1), second communication main frame (2), communication slave (4), it is characterized in that, in first communication host (1), second communication main frame (2) increases a commutation circuit (3) between the communication slave (4);
The communication interface (11) of first communication host (1), the communication interface (21) of second communication main frame (2), the communication interface (41) of communication slave (4) is all received on the commutation circuit, and second communication main frame (2) is by control interface (23) control commutation circuit;
By default, second communication main frame (2) makes the communication interface (11) of first communication host (1) be connected with the communication interface (41) of communication slave (4) by control interface (23) control commutation circuit, and the communication interface (21) of second communication main frame (2) is disconnected with the communication interface (41) of the slave of communicating by letter (4); When second communication main frame (2) need be communicated by letter with the slave of communicating by letter (4), second communication main frame (2) makes the communication interface (21) of second communication main frame (2) be connected with the communication interface (41) of communication slave (4) by control interface (23) control commutation circuit, and the communication interface (11) of first communication host (1) is disconnected with the communication interface (41) of the slave of communicating by letter (4).
2. switch between two main frames in the data communication according to claim 1 and slave between communicator, it is characterized in that, second communication main frame (2) also has one to intercept interface (22) and receive on the commutation circuit (3), second communication main frame (2) is by intercepting the communication that interface (22) is intercepted first communication host (1) and the slave of communicating by letter (4), when second communication main frame (2) need be communicated by letter with the slave of communicating by letter (4), earlier by intercepting after interface (22) is judged first communication host (1) and the communication of the slave of communicating by letter (4) is finished, second communication main frame (2) makes the communication interface (21) of second communication main frame (2) be connected with the communication interface (41) of communication slave (4) by control interface (23) control commutation circuit again, and the communication interface (11) of first communication host (1) is disconnected with the communication interface (41) of the slave of communicating by letter (4).
According to switch between two main frames in claim 1 or the described data communication of claim 2 and slave between communicating devices, it is characterized in that, described commutation circuit comprises the communication interface (P2) of first communication host, the communication interface of second communication main frame (P3), the communication interface (P4) of communication slave, second communication HCI (P1) and relay (K1), resistance (R1), earial drainage diode (D1);
The positive pole of second communication HCI (P1) is received a control end of relay (K1) by resistance (R1), perfectly straight another control end of receiving relay (K1) of negative pole, earial drainage diode (D1) is attempted by two control ends of relay (K1), and the positive pole of earial drainage diode (D1) is connected with the negative pole of second communication HCI (P1);
The communication interface (P4) of communication slave is received on the common group of relay (K1), and the communication interface of first communication host (P2), the communication interface of second communication main frame (P3) are received other two groups of contacts of relay (K1) respectively;
By default, second communication HCI (P1) control relay (K1) makes the common group of relay (K1) be connected with the communication interface (P2) of first communication host, and the common group of relay (K1) and the communication interface (P3) of second communication main frame are disconnected, when the second communication main frame will be communicated by letter with the slave of communicating by letter, second communication HCI (P1) control relay (K1) makes the common group of relay (K1) be connected with the communication interface (P3) of second communication main frame, and the common group of relay (K1) and the communication interface (P2) of first communication host are disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520061179 CN2814220Y (en) | 2005-07-13 | 2005-07-13 | Inter-double main machines switching communicating device with inter secondary machines in data communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520061179 CN2814220Y (en) | 2005-07-13 | 2005-07-13 | Inter-double main machines switching communicating device with inter secondary machines in data communication |
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| Publication Number | Publication Date |
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| CN2814220Y true CN2814220Y (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520061179 Expired - Lifetime CN2814220Y (en) | 2005-07-13 | 2005-07-13 | Inter-double main machines switching communicating device with inter secondary machines in data communication |
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| CN (1) | CN2814220Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602382A (en) * | 2011-04-14 | 2012-07-25 | 中南大学 | Anti-skid braking controller for airplane |
| CN101267425B (en) * | 2007-03-16 | 2014-07-30 | 上海贝电实业股份有限公司 | Inter-board interface communication protocol for dynamic environment distributed monitoring system |
| CN105759691A (en) * | 2016-04-18 | 2016-07-13 | 广东芬尼克兹节能设备有限公司 | Master-slave switching communication method and system implemented through 485 port |
| CN107248933A (en) * | 2017-06-09 | 2017-10-13 | 湖南中车时代通信信号有限公司 | A kind of method of the double main protection of rail traffic signal system |
| CN107678893A (en) * | 2016-08-02 | 2018-02-09 | 致伸科技股份有限公司 | Use the system of different operating system test electronic product |
| CN108400920A (en) * | 2018-04-28 | 2018-08-14 | 国网江苏省电力有限公司电力科学研究院 | A kind of RS-485 communication systems with the double time controls of priority |
| CN110529986A (en) * | 2019-09-25 | 2019-12-03 | 珠海格力电器股份有限公司 | Dual system communicates topological structure, dual system air conditioner |
-
2005
- 2005-07-13 CN CN 200520061179 patent/CN2814220Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101267425B (en) * | 2007-03-16 | 2014-07-30 | 上海贝电实业股份有限公司 | Inter-board interface communication protocol for dynamic environment distributed monitoring system |
| CN102602382A (en) * | 2011-04-14 | 2012-07-25 | 中南大学 | Anti-skid braking controller for airplane |
| CN102602382B (en) * | 2011-04-14 | 2014-03-12 | 中南大学 | Anti-skid braking controller for airplane |
| CN105759691A (en) * | 2016-04-18 | 2016-07-13 | 广东芬尼克兹节能设备有限公司 | Master-slave switching communication method and system implemented through 485 port |
| CN105759691B (en) * | 2016-04-18 | 2018-11-20 | 广东芬尼克兹节能设备有限公司 | A kind of the master-slave swap communication means and system existing by 485 causes for gossip |
| CN107678893A (en) * | 2016-08-02 | 2018-02-09 | 致伸科技股份有限公司 | Use the system of different operating system test electronic product |
| CN107248933A (en) * | 2017-06-09 | 2017-10-13 | 湖南中车时代通信信号有限公司 | A kind of method of the double main protection of rail traffic signal system |
| CN108400920A (en) * | 2018-04-28 | 2018-08-14 | 国网江苏省电力有限公司电力科学研究院 | A kind of RS-485 communication systems with the double time controls of priority |
| CN110529986A (en) * | 2019-09-25 | 2019-12-03 | 珠海格力电器股份有限公司 | Dual system communicates topological structure, dual system air conditioner |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150713 Granted publication date: 20060906 |
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| EXPY | Termination of patent right or utility model |