CN203054518U - RS485 serial port detecting and repairing device - Google Patents
RS485 serial port detecting and repairing device Download PDFInfo
- Publication number
- CN203054518U CN203054518U CN 201320074920 CN201320074920U CN203054518U CN 203054518 U CN203054518 U CN 203054518U CN 201320074920 CN201320074920 CN 201320074920 CN 201320074920 U CN201320074920 U CN 201320074920U CN 203054518 U CN203054518 U CN 203054518U
- Authority
- CN
- China
- Prior art keywords
- module
- control module
- single chip
- serial port
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The utility model provides an RS485 serial port detecting and repairing device. The device comprises a one-chip microcomputer control module, a low input voltage load current limiting switch, a first RS485 module, a second RS485 module, an electronic switch and a relay; and the low input voltage load current limiting switch is connected with the first RS85 module and the one-chip microcomputer control module and used for transmitting a fault signal of the first RS485 module to the one-chip microcomputer control module. Through the design of the RS485 serial port detecting and repairing device, not only is the problem of chip damage solved, but also normal work of the serial port can be detected and recovered, providing a simple and convenient technique for detecting and repairing the serial port for people.
Description
Technical field
The utility model relates to a kind of pick-up unit, relates in particular to a kind of RS485 serial ports apparatus for examination and repair.
Background technology
RS485 produces for remedying shortcomings such as the RS232 communication distance is short, speed is low, RS485 and RS232 are different, characteristics such as data-signal is to adopt differential transfer mode (Differential Driver Mode), and the RS485 communication pattern is simple in structure owing to having, cheap, communication distance and message transmission rate are suitable are widely used in fields such as instrument and meter, the collecting and distributing control of intellectualized sensor, building control, monitoring alarm.But there are shortcomings such as self-adaptation, self-protection function fragility in the RS485 bus, as not noting the processing of some details, faults such as communication failure even systemic breakdown often occur, and it is most important therefore to improve the RS485 operational reliability.Existing utility model patent CN202512567U relates to a kind of pair of serial ports automatic switching circuit, and utility model patent CN202475477U provides a kind of RS485 interface to change the automatic switchover transmission circuit of serial ports.Though more than novel can realize serial ports automatically conversion and interface change the automatic switchover of serial ports, they can not realize detection alarm and the operate as normal of recovering serial ports to serial port chip.The utility model is to a kind of device of detection and the reparation of serial port chip.
Summary of the invention
In order to overcome existing RS485 causes the damage of chip because of a variety of causes in application process problem, the utility model provides a kind of RS485 serial ports apparatus for examination and repair.
For achieving the above object, the technical solution adopted in the utility model is: a kind of RS485 serial ports apparatus for examination and repair is characterized in that: comprise single chip control module, low input load current limiting switch, a RS485 module, the 2nd RS485 module, electronic switch, relay;
Described low input load current limiting switch is connected with a described RS485 module, described single chip control module, is used for transmitting the fault-signal of a described RS485 module to described single chip control module;
Described single chip control module and being connected with a described RS485 module, described the 2nd RS485 module by described electronic switch is for according to described fault-signal and control described electronic switch and close described the 2nd RS485 module;
Described single chip control module is connected with a described RS485 module and described the 2nd RS485 module by described relay, is used for controlling the signal that described relay switch is exported the 2nd RS485 module according to described fault-signal.
First preferred version of the present utility model is that relay is HRS2H-S-DC5V-N.
Second preferred version of the present utility model is that described electronic switch is ADG884.
Technical advantage of the present utility model is:
1, not only solved the problem of chip damage by design of the present utility model, and can detect and recover the operate as normal of serial ports, a kind of technology of maintenance of simple and convenient serial ports is provided for people.
2, by realize linking to each other with the peripheral hardware switching of chip of relay and electronic switch, not only improved efficient but also reduced power consumption.
3, structural design of the present utility model is simple, and line design is simple, cheap, control is convenient, thereby has improved the reliability of work.
Description of drawings
Fig. 1 is the present embodiment circuit module figure.
Embodiment
Below in conjunction with specific embodiment utility model is described further.
With reference to figure 1, a kind of RS485 serial ports apparatus for examination and repair comprises single chip control module, low input load current limiting switch, a RS485 module, the 2nd RS485 module, electronic switch, relay; Low input load current limiting switch is connected with a RS485 module, single chip control module, is used for transmitting the fault-signal of a RS485 module to single chip control module.
Single chip control module also is connected with a RS485 module, the 2nd RS485 module by electronic switch, is used for according to fault-signal and controls electronic switch and close the 2nd RS485 module; Single chip control module is connected with a RS485 module and the 2nd RS485 module by relay, is used for exporting according to fault-signal pilot relay switch the signal of the 2nd RS485 module.Relay is HRS2H-S-DC5V-N.Electronic switch is ADG884.
After connecting power supply, a RS485 module operate as normal, the signal of (CONA) end that single chip control module is connected with electronic switch is 1.In a period of time, there are not emission and the reception of data-signal when single chip control module, illustrating then that a RS485 module has been damaged can not continue to transmit data, this moment, a continuous current state (maximum current is 40mA) can appear in low input load current limiting switch, producing fault-signal and the OC end of the TPS22943 of low input load current limiting switch is dragged down is 0, this signal is sent to single chip control module, single chip control module detects OC end rub-out signal 0, single chip control module will send signal 0 to CONA end, TPS22943 is closed, this moment, electronic switch switched to the connection status of the 2nd RS485 module, the useful signal of single chip control module transmission simultaneously makes relay finish adhesive, serial ports output is switched to the 2nd RS485 module from a RS485 module, thereby reach the detection of a RS485 module and the purpose of the operate as normal of recovering serial ports.
Protection domain of the present utility model is not limited in the record of above-described embodiment, and all are based on the technical scheme of the present utility model thought, all in the utility model protection domain.
Claims (3)
1. a RS485 serial ports apparatus for examination and repair is characterized in that: comprise single chip control module, low input load current limiting switch, a RS485 module, the 2nd RS485 module, electronic switch, relay;
Described low input load current limiting switch is connected with a described RS485 module, described single chip control module, is used for transmitting the fault-signal of a described RS485 module to described single chip control module;
Described single chip control module and being connected with a described RS485 module, described the 2nd RS485 module by described electronic switch is for according to described fault-signal and control described electronic switch and close described the 2nd RS485 module;
Described single chip control module is connected with a described RS485 module and described the 2nd RS485 module by described relay, is used for controlling the signal that described relay switch is exported the 2nd RS485 module according to described fault-signal.
2. according to the described RS485 serial ports of claim 1 apparatus for examination and repair, it is characterized in that: relay is HRS2H-S-DC5V-N.
3. according to the described RS485 serial ports of claim 1 apparatus for examination and repair, it is characterized in that: described electronic switch is ADG884.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320074920 CN203054518U (en) | 2013-01-25 | 2013-01-25 | RS485 serial port detecting and repairing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320074920 CN203054518U (en) | 2013-01-25 | 2013-01-25 | RS485 serial port detecting and repairing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203054518U true CN203054518U (en) | 2013-07-10 |
Family
ID=48737451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320074920 Expired - Fee Related CN203054518U (en) | 2013-01-25 | 2013-01-25 | RS485 serial port detecting and repairing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203054518U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117806291A (en) * | 2024-03-01 | 2024-04-02 | 沈阳安飞科技有限公司 | Detection method for 3 standby RS485 interfaces in single-chip microcomputer controller |
-
2013
- 2013-01-25 CN CN 201320074920 patent/CN203054518U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117806291A (en) * | 2024-03-01 | 2024-04-02 | 沈阳安飞科技有限公司 | Detection method for 3 standby RS485 interfaces in single-chip microcomputer controller |
| CN117806291B (en) * | 2024-03-01 | 2024-05-14 | 沈阳安飞科技有限公司 | Detection method for 3 standby RS485 interfaces in single-chip microcomputer controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101995876A (en) | M-BUS controller | |
| CN103075782A (en) | Non-polar power supplying communication system of multi-connection type air conditioner | |
| CN102749890A (en) | Redundancy method for DCS (distributed control system) control module | |
| CN103227758B (en) | A kind of fiber optic Ethernet switch and control method | |
| CN203149559U (en) | Multi-slave-structure MBUS host machine device | |
| CN203054518U (en) | RS485 serial port detecting and repairing device | |
| CN203435006U (en) | Bus isolator | |
| CN203325410U (en) | Novel LED display screen | |
| CN105353683A (en) | MBUS-based multifunctional energy consumption data acquisition controller | |
| CN104077260B (en) | A kind of concentrator M BUS host communication interface arrangements | |
| CN202649997U (en) | Detection and recovery device for USB communication port, and communication equipment | |
| CN201886347U (en) | M-BUS controller | |
| CN203337268U (en) | Temperature and pressure monitoring and early warning system of circuit breaker operating mechanism | |
| CN204652035U (en) | A kind of Signal Detecting Circuit for Automatic Transfer Switching Equipment | |
| CN202424940U (en) | Multi-channel television signal monitoring and alarming device | |
| CN208043951U (en) | Phase checking device based on car switch | |
| CN203732930U (en) | An energy source data acquisition terminal with two RS485 interfaces | |
| CN203178384U (en) | Multi power supply identifying device based on BPL technology | |
| CN206133938U (en) | Electric power carrier wave communication formula road traffic signal falls timing indicator | |
| CN205899300U (en) | Four ways switch quantity output device based on CIB BUS bus control mode | |
| CN103631186A (en) | On-board equipment plug-and-play test interface circuit and method for realizing plug-and-play data transmission | |
| CN203733111U (en) | USB transmission interrupt automatic recovery device | |
| CN204695554U (en) | Modularization industry audio loop signal detection system | |
| CN204473777U (en) | Mine-used I. S tandem device | |
| CN202309148U (en) | Charge monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20140125 |