CN109408436A - For overloading the switching circuit and method of 422 serial ports of starter double redundancy - Google Patents
For overloading the switching circuit and method of 422 serial ports of starter double redundancy Download PDFInfo
- Publication number
- CN109408436A CN109408436A CN201811231840.3A CN201811231840A CN109408436A CN 109408436 A CN109408436 A CN 109408436A CN 201811231840 A CN201811231840 A CN 201811231840A CN 109408436 A CN109408436 A CN 109408436A
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- Prior art keywords
- serial ports
- circuit
- switching circuit
- door
- output
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
Abstract
The invention discloses a kind of for overloading the switching circuit and method of 422 serial ports of starter double redundancy, which includes receiving transmitting line, the enabled circuit of the interlocking for guaranteeing only 422 serial ports output all the way and for providing the triggering switching circuit of triggering switching signal for realizing 422 serial ports of two-way of 422 level conversions；The input terminal for interlocking enabled circuit is connect with the output end of triggering switching circuit, and the output end for interlocking enabled circuit is connected with the DE pin of the one 422 serial ports, and the output end of the triggering switching circuit is connected with the DE pin of the 2nd 422 serial ports；One 422 serial ports is in parallel with the 2nd 422 serial ports receiving channel, and the one 422 serial ports is with the 2nd 422 serial ports output channel by connecting after resistance.The switching circuit of 422 serial ports of double redundancy and method are used to overload in starter by the invention, and system reliability is high.
Description
Technical field
The present invention relates to overload hardware-initiated technology, more particularly to one kind for overloading 422 serial ports of starter double redundancy
Switching circuit and method.
Background technique
Overload starting method is divided into hardware-initiated and software and starts two methods, and software starting is because having complicated logic to sentence
Constant current journey and mistake proofing verify measure, more hardware-initiated to have higher safety, are widely used now.Starter is overloaded to use
The method of the combination of hardware-initiated and software starting, the redundancy switching started using hardware, software can be improved the reliable of system
Property.
The hardware-initiated hardware OR circuit that can be used realizes dual redundant output, and the present invention is by interlocking enabled circuit pair
RS422, which receives transmitter, to carry out making can control, and realizes the switching of 422 serial ports.
Summary of the invention
The technical problem to be solved in the present invention is that for the defects in the prior art, providing a kind of for overloading starting dress
Set the switching circuit and method of 422 serial ports of double redundancy.
The technical solution adopted by the present invention to solve the technical problems is: one kind is for overloading starter double redundancy 422
The switching circuit of serial ports receives transmitting line, for guaranteeing only have including 422 serial ports of two-way for realizing 422 level conversions
The interlocking of 422 serial ports output enables circuit and for providing the triggering switching circuit of triggering switching signal all the way；
The input terminal for interlocking enabled circuit is connect with the output end of triggering switching circuit, and described interlock enables circuit
Output end is connected with the DE pin of the one 422 serial ports, the output end of the triggering switching circuit and the DE pin of the 2nd 422 serial ports
It is connected；
One 422 serial ports is in parallel with the 2nd 422 serial ports receiving channel, the one 422 serial ports and the 2nd 422 serial ports
Output channel connects after passing through resistance.
According to the above scheme, described interlock enables circuit as NPN type emitter ground switch circuit.
According to the above scheme, the triggering switching circuit for providing triggering switching signal includes I/O signal, PWM triggering
Circuit and with door；The output of the I/O signal and PWM trigger circuit is the input with door；The I/O signal and PWM triggering electricity
The output on road is grounded after passing through resistance.
A kind of switching method using the above-mentioned switching circuit for being used to overload 422 serial ports of starter double redundancy, including with
Lower step:
1) triggering switching circuit exports after passing through I/O and PWM and logic respectively, normal condition, is low with door output level；
2) it interlocks enabled circuit and receives the low level exported with door, reported at this point, the one 422 serial ports sends Serial Port Information；
If 3) the one 422 serial port circuit failure, serial ports failure is sent by superior system, controller receives first serial
Fault message, at the same set high I/O and triggering PWM, PWM trigger circuit export high level, while act on after door input terminal, with
Door output high level interlocks the high level of enabled circuit reception and door output, stops working at this point, the one 422 serial ports is cut off,
Meanwhile the 2nd 422 serial ports send Serial Port Information report.
The beneficial effect comprise that: the switching circuit and method by 422 serial ports of double redundancy of the invention
For overloading in starter, so that 422 serial ports is realized interlocking by hardware circuit by interlocking enabled circuit, realize 422 serial ports
Switching, can effectively avoid 422 serial ports and work at the same time, generate data-crosstalk；Switching circuit use and logical design are triggered, can be kept away
Exempt from accidentally to switch caused by interfering；The switching circuit and method improve the safety and reliability of system.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the circuit diagram of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
As depicted in figs. 1 and 2, a kind of for overloading the switching circuit of 422 serial ports of starter double redundancy, including for real
422 serial ports of two-way of existing 422 level conversions receives transmitting line, for guaranteeing that only the interlocking of 422 serial ports output enables all the way
Circuit and for provide triggering switching signal triggering switching circuit；
The input terminal for interlocking enabled circuit is connect with the output end of triggering switching circuit, and described interlock enables circuit
Output end is connected with the DE pin of 422A serial ports, and the output end of the triggering switching circuit is connected with the DE pin of 422B serial ports；
The A serial ports is in parallel with B serial ports receiving channel, and the A serial ports is with B serial ports output channel by connecting after resistance.
Wherein, interlocking enabled circuit is NPN type emitter ground switch circuit.
For provide triggering switching signal triggering switching circuit include I/O signal, PWM trigger circuit and with door；It is described
The output of I/O signal and PWM trigger circuit is the input with door；The output of the I/O signal and PWM trigger circuit passes through resistance
After be grounded.
A kind of switching method using the above-mentioned switching circuit for being used to overload 422 serial ports of starter double redundancy, including with
Lower step:
1) triggering switching circuit exports after passing through I/O and PWM and logic respectively, normal condition, is low with door output level；
2) it interlocks enabled circuit and receives the low level exported with door, reported at this point, A serial ports sends Serial Port Information；
If 3) A serial port circuit failure, serial ports failure is sent by superior system, controller receives A serial ports fault message, together
When set high I/O and triggering PWM, PWM trigger circuit export high level, while acting on after door input terminal, export high electricity with door
It is flat, the high level of enabled circuit reception and door output is interlocked, is stopped working at this point, A serial ports is cut off, meanwhile, B serial ports, which is sent, goes here and there
Mouth information reporting.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (4)
1. a kind of for overloading the switching circuit of 422 serial ports of starter double redundancy, which is characterized in that including for realizing 422
422 serial ports of two-way of level conversion receive transmitting line, the enabled circuit of the interlocking for guaranteeing only 422 serial ports output all the way,
And for providing the triggering switching circuit of triggering switching signal；
The input terminal for interlocking enabled circuit is connect with the output end of triggering switching circuit, the output for interlocking enabled circuit
End is connected with the DE pin of the one 422 serial ports, the DE pin phase of the output end and the 2nd 422 serial ports of the triggering switching circuit
Even；
One 422 serial ports is in parallel with the 2nd 422 serial ports receiving channel, and the one 422 serial ports and the 2nd 422 serial ports export
Channel connects after passing through resistance.
2. according to claim 1 for overloading the switching circuit of 422 serial ports of starter double redundancy, which is characterized in that
Described interlock enables circuit as NPN type emitter ground switch circuit.
3. according to claim 1 for overloading the switching circuit of 422 serial ports of starter double redundancy, which is characterized in that
It is described for provides trigger switching signal triggering switching circuit include I/O signal, PWM trigger circuit and with door；The I/O letter
Number and the output of PWM trigger circuit be input with door；The output of the I/O signal and PWM trigger circuit is followed by by resistance
Ground.
4. a kind of using any switching circuit for overloading 422 serial ports of starter double redundancy of claims 1 to 33
Switching method, comprising the following steps:
1) triggering switching circuit exports after passing through I/O and PWM and logic respectively, normal condition, is low with door output level；
2) it interlocks enabled circuit and receives the low level exported with door, reported at this point, the one 422 serial ports sends Serial Port Information；
If 3) the one 422 serial port circuit failure, serial ports failure is sent by superior system, controller receives first serial failure
Information, at the same set high I/O and triggering PWM, PWM trigger circuit export high level, while act on after door input terminal, it is defeated with door
High level out interlocks enabled circuit and receives the high level exported with door, stops working at this point, the one 422 serial ports is cut off, together
When, the 2nd 422 serial ports sends Serial Port Information and reports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811231840.3A CN109408436B (en) | 2018-10-22 | 2018-10-22 | Switching method of switching circuit of dual-redundancy 422 serial port of overload starting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811231840.3A CN109408436B (en) | 2018-10-22 | 2018-10-22 | Switching method of switching circuit of dual-redundancy 422 serial port of overload starting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109408436A true CN109408436A (en) | 2019-03-01 |
| CN109408436B CN109408436B (en) | 2022-03-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811231840.3A Active CN109408436B (en) | 2018-10-22 | 2018-10-22 | Switching method of switching circuit of dual-redundancy 422 serial port of overload starting device |
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|---|---|
| CN (1) | CN109408436B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176939A (en) * | 2013-01-16 | 2013-06-26 | 安徽工程大学 | Redundant serial communication device with automatic replacing function |
| US20130343402A1 (en) * | 2012-06-26 | 2013-12-26 | International Business Machines Corporation | Fault tolerant parallel receiver interface with receiver redundancy |
| CN106896750A (en) * | 2017-03-16 | 2017-06-27 | 上海鼎桩新能源科技有限公司 | The serial ports redundancy switching method and device of a kind of controller system |
| US20180165241A1 (en) * | 2016-12-08 | 2018-06-14 | Phison Electronics Corp. | Channel switching device, memory storage device and channel switching method |
-
2018
- 2018-10-22 CN CN201811231840.3A patent/CN109408436B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130343402A1 (en) * | 2012-06-26 | 2013-12-26 | International Business Machines Corporation | Fault tolerant parallel receiver interface with receiver redundancy |
| CN103176939A (en) * | 2013-01-16 | 2013-06-26 | 安徽工程大学 | Redundant serial communication device with automatic replacing function |
| US20180165241A1 (en) * | 2016-12-08 | 2018-06-14 | Phison Electronics Corp. | Channel switching device, memory storage device and channel switching method |
| CN106896750A (en) * | 2017-03-16 | 2017-06-27 | 上海鼎桩新能源科技有限公司 | The serial ports redundancy switching method and device of a kind of controller system |
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| Publication number | Publication date |
|---|---|
| CN109408436B (en) | 2022-03-18 |
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