CN208337601U - A kind of RS-485 communication system with the double time controls of priority - Google Patents
A kind of RS-485 communication system with the double time controls of priority Download PDFInfo
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- CN208337601U CN208337601U CN201820626588.5U CN201820626588U CN208337601U CN 208337601 U CN208337601 U CN 208337601U CN 201820626588 U CN201820626588 U CN 201820626588U CN 208337601 U CN208337601 U CN 208337601U
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- 238000004891 communication Methods 0.000 title claims abstract description 39
- 238000012546 transfer Methods 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 10
- 230000003111 delayed effect Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims 1
- 238000013480 data collection Methods 0.000 abstract description 4
- 238000010079 rubber tapping Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- -1 electricity Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 230000006855 networking Effects 0.000 description 1
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Abstract
The utility model discloses a kind of RS-485 communication systems with the double time controls of priority, it includes external tapping protection circuit, signal monitoring circuit, priority class of traffic control circuit, power control circuit, signal switching relay, power transfer relay and RS-485 Wiring port；The utility model makes the automatic data collection based on RS-485 bus become the topological structure of " more host nodes are mostly from node " from the topological structure of traditional " host node is mostly from node ", access while same RS-485 communication system is realized to multichannel RS-485 host node and from node, to promote the flexibility of RS-485 communication system field wiring and the convenience of automatic data collection.
Description
Technical field
The utility model belongs to remote concentrated ammeter reading technical field, and in particular to a kind of RS-485 with the double time controls of priority
Communication system.
Background technique
Nineteen eighty-three electronic industries alliance is formulated on the basis of RS-422 and has issued RS-485 standard.And it is assisted by communication industry
TIA/EIA-485-A is named as after revising, habit is referred to as RS-485 agreement.RS-485 normal data signals are passed using difference
It is defeated, also referred to as balance transmission, due to the remote of RS-485, multinode and transmission line characteristic at low cost, so that it is extensively
Apply to industrial automation and automatic data collection field (including ammeter, water meter, gas meter, hotlist remote data acquisition).RS-
The conventional topologies structure of 485 buses is that a host node is mostly not allow for multiple host nodes from joint form, same bus, when need
When disposing multiple host nodes, multiple mutually incoherent independent principal and subordinate's routes need to be set up.
Currently, water, electricity, gas, heat " multiple-in-one " remote auto meter reading system (abbreviation multilist centralized meter-reading system) be in the whole society
Active response is obtained, the built multilist collection for erecting million userbase grades of total in all parts of the country copies pilot.Multilist centralized meter-reading system
Construction will break between original water, electricity, gas, hotlist the barrier of " language obstacle is respectively handled ", and original manual metering is upgraded
For remote automatic meter reading, public utilities infrastructure overlapping investment can be reduced, reduces the comprehensive operation cost of public service,
It is of great significance to public service service level is promoted.As multilist centralized meter-reading system construction scale is growing, RS-
The primary communication channels that 485 buses are acquired as meter data, a traditional host node are mostly limited from node topology characteristic
The flexibility of multilist centralized meter-reading system field wiring need to set up a plurality of RS-485 communication line, increase when acquiring larger
System Construction cost causes data acquisition and the convenience of equipment O&M insufficient, is unfavorable for the popularization and application of multilist centralized meter-reading system.
Utility model content
The technical issues of the utility model is solved is to overcome current RS-485 communication system " one master and multiple slaves " topological structure
More host nodes cannot be supported to implement the deficiency of data transmission in same RS-485 communication line, be based on the double time control techniques of priority,
Establish a kind of novel RS-485 communication system with " how main mostly from " topological characteristic, realize multichannel RS-485 host node with from section
It is accessed while point.
A kind of RS-485 communication system with the double time controls of priority of the utility model, it is characterised in that:
A kind of RS-485 communication system with the double time controls of priority, it includes voltage-stabilized power supply circuit, external interface protection electricity
Road, signal monitoring circuit, priority class of traffic control circuit, power control circuit, signal switch relay, power transfer relay
With RS-485 Wiring port；The signal input part by interface protective circuit and signal monitoring circuit, it is total by RS-485
Line is connected with RS-485 Wiring port, and signal output end is connected with priority class of traffic control circuit and power control circuit, provides
Signal judgement；
The signal output end of the priority class of traffic control circuit is connected with signal switching relay signal input terminal,
Delayed control signal is provided, the turn-off delay time is Ts (Ts is settable, can set 30 ~ 600s of range), in Ts time internal control
The switching of signal switching relay processed, switches relay recovery more than Ts time signal；The signal of the power control circuit
Output end is connected with power transfer relay signal input part, provides delayed control signal, and the delay time is that (Tp can by Tp
Setting, can set 30~600s of range), the switching of power transfer relay is controlled within the power supply delay time Tp time, more than Tp
Time power transfer relay restores；The signal end of the signal switching relay is connected with RS-485 Wiring port, passes through RS-
The Wiring port of multichannel RS-485 host node outside the connection of 485 Wiring ports and/or the Wiring port of RS-485 child node；
The output end of the power transfer relay is connected with RS-485 Wiring port, is connected by RS-485 Wiring port
The supply port of external multichannel RS-485 child node simultaneously provides stable 12V power supply.
Specifically it further includes condition indication circuit, and the condition indication circuit is connect with priority class of traffic control circuit,
It is used to indicate and the state of the corresponding RS-485 host node of RS-485 Wiring port connection, RS-485 child node circuit.
Further include voltage-stabilized power supply circuit, the voltage-stabilized power supply circuit input terminal takes electricity by alternating current, power output end with
The input terminal of power transfer relay is connected, and provides stable 12V electricity for RS-485 communication system and outside RS-485 child node
Source.The voltage-stabilized power supply circuit uses switch power voltage-stabilizing circuit.
When every road RS-485 host node meter reading works, relay is switched by signal the host node of highest priority is accurate
Automatically switch connection RS-485 child node route and postpone a period of time Ts (Ts is settable, can set 30~600s of range), disconnects
The connection of other RS-485 host nodes realizes that reliable communication is isolated in RS-485 bus physical, lights the corresponding bright prompt of indicator light and connects
It connects and communications status, and to external RS-485 equipment for electric delay Tp for a period of time (Tp is settable, can set 30~600s of range).
The range of the turn-off delay time Ts is 30~600s.
The range of the power supply delay time Tp is 30~600s.
The utility model has the beneficial effects that
The utility model can be by the automatic data acquisition system based on RS-485 bus by the topology of original one master and multiple slaves
Structure, become it is mostly main mostly from topology connection structure, realize that multichannel RS-485 host node is communicated with from node in same RS-485
Synchronous access in system.In the construction of multilist centralized meter-reading system, the RS-485 host node being newly added can be directly incorporated into live original
Some RS-485 bus data acquisition systems, are effectively saved construction wiring cost, improve data acquisition and equipment O&M
Convenience improves the utilization rate of existing communication facility.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of the utility model.
Fig. 2 is the networking structure schematic diagram of the utility model.
Specific embodiment
Below in conjunction with Figure of description, the utility model is further described.
The utility model is applied to " water, electricity and gas heat " multiple-in-one remote auto meter reading system (abbreviation multilist centralized meter-reading system)
When, RS-485 host node includes RS-485 concentrator, collector, copy controller and communication interface converter etc., and RS-485 is from node
Including RS-485 ammeter, RS-485 water meter, RS-485 gas meter and RS-485 hotlist.In the realistic case, in the same RS-485
There can only be " one master and multiple slaves " topological structure of a RS-485 host node and multiple RS-485 from node in kilowatt meter reading-out system.This reality
It is exactly that new master is added in the case where not destroying, not interfering original host node with from node normal communication with novel effect
Node device.
In the present embodiment, RS-485 host node is respectively host node 1: the acquisition of the original RS-485 water meter of Running-water Company
Equipment, host node 2: the acquisition equipment that Utilities Electric Co.'s later period is added can be II type collector, be also possible to communication interface conversion
Device.It is original more RS-485 water meters from node.Since RS-485 water meter is low pressure meter, the external 12V that provides is needed to power.
As shown in Figure 1, a kind of RS-485 communication system with the double time controls of priority of the utility model includes external interface
Protect circuit, signal monitoring circuit, priority class of traffic control circuit, power control circuit, signal switching relay, power supply switching
Relay and RS-485 Wiring port.As shown in Fig. 2, a kind of RS-485 communication system with the double time controls of priority of the utility model
System connection alternating current takes electricity, and the RS-485 host node of multichannel accesses the utility model, each RS-485 by multichannel RS-485 bus
Child node by accessing the utility model with RS-485 bus all the way, powered by the utility model by RS-485 child node, is realized
The more host nodes of the utility model are mostly from the Topology connection of node.
Host node 1, host node 2 protect circuit to access the utility model by external interface respectively, and host node 1 is set as high
The host node of priority, host node 2 are the host node of low priority.When host node 1 and host node 2 need to acquire RS- simultaneously
When 485 water meter information or host node 1 individually acquire RS-485 water meter information, signal monitoring circuit monitors host node 1 or main section
Point 2 has meter reading signal, the meter reading signal of monitoring is passed to priority class of traffic control circuit and power control circuit, signal priority
Grade control circuit, which provides delayed control signal, switches signal switching relay accordingly, by host node 1 and RS- after switching
485 water meters are established a connection by RS-485 Wiring port, and light the status indicator lamp of corresponding host node 1.Power supply control
Circuit, which provides delayed control signal, switches power transfer relay accordingly, carries out 12V confession to RS-485 table after switching
Electricity.When the stopping meter reading of host node 1,30s is taken by Ts in turn-off delay time Ts(the present embodiment, by live real data copy reading
Demand determines) afterwards host node 1 and RS-485 water meter disconnect relationship, using Tp in power supply delay time Tp(the present embodiment
120s is taken, is determined by live water meter supplied character) stop carrying out 12V power supply to RS-485 table afterwards.
When host node 2 individually acquires RS-485 water meter information, signal monitoring circuit monitors that host node 2 has meter reading signal,
The meter reading signal of monitoring is passed into priority class of traffic control circuit and power control circuit, priority class of traffic control circuit provides
Delayed control signal switches signal switching relay accordingly, and host node 2 and RS-485 water meter are passed through RS- after switching
485 Wiring ports establish a connection, and light the status indicator lamp of corresponding host node 2.Power control circuit provides delay control
Signal processed switches power transfer relay accordingly, carries out 12V power supply to RS-485 table after switching.When host node 2 stops
Only meter reading takes 30s by Ts in turn-off delay time Ts(the present embodiment, is determined by live real data copy reading demand) after main section
Point 2 disconnects relationship with RS-485 water meter, 120s is taken using Tp in power supply delay time Tp(the present embodiment, by live water
Table supplied character determines) stop carrying out 12V power supply to RS-485 table afterwards.
In conclusion a kind of RS-485 communication system with the double time controls of priority of the utility model, can will be based on RS-
The automatic data acquisition system of 485 buses by original one master and multiple slaves topological structure, become it is mostly main mostly from topological structure, realize
Multichannel RS-485 host node with from node in same RS-485 communication system it is synchronous access.In the construction of multilist centralized meter-reading system
In, the RS-485 host node being newly added can be directly incorporated into the original RS-485 data collection system in scene, be effectively saved construction
Wiring cost improves the convenience of data acquisition and equipment O&M, improves the utilization rate of existing communication facility.
The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry
It should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe this
The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change
And improvement, these various changes and improvements fall within the scope of the claimed invention.The utility model requires protection scope
It is defined by the appending claims and its equivalent thereof.
Claims (10)
1. a kind of RS-485 communication system with the double time controls of priority, which is characterized in that protect circuit, signal including external interface
Observation circuit, priority class of traffic control circuit, power control circuit, signal switching relay, power transfer relay and RS-
485 Wiring ports；
The signal input part of the signal monitoring circuit is connected by interface protective circuit with RS-485 bus, signal output end
It is connected with priority class of traffic control circuit and power control circuit, signal judgement is provided；
The signal output end of the priority class of traffic control circuit is connected with signal switching relay signal input terminal, provides
Delayed control signal controls the switching of signal switching relay within the turn-off delay time Ts time, is more than turn-off delay time
Ts signal switches relay recovery；
The signal output end of the power control circuit is connected with power transfer relay signal input part, provides delay control
Signal processed controls the switching of power transfer relay within the power supply delay time Tp time, is more than power supply delay time Tp power supply
Switch relay recovery；
The output end of the signal switching relay is connected with RS-485 Wiring port, is connected by RS-485 Wiring port external
Multichannel RS-485 host node Wiring port and RS-485 child node Wiring port；
The output end of the power transfer relay is connected with RS-485 Wiring port, is connected by RS-485 Wiring port external
Multichannel RS-485 child node supply port.
2. RS-485 communication system according to claim 1, which is characterized in that it further include condition indication circuit, it is described
Condition indication circuit is connect with priority class of traffic control circuit, is used to indicate and the corresponding RS-485 of RS-485 Wiring port connection
The state of host node and/or RS-485 child node circuit.
3. RS-485 communication system according to claim 1, which is characterized in that it further includes voltage-stabilized power supply circuit, described
Voltage-stabilized power supply circuit input terminal electricity is taken by alternating current, output end is connected with the input terminal of power transfer relay, and be RS-
485 communication systems and outside RS-485 child node, which provide, stablizes 12V power supply.
4. RS-485 communication system according to claim 3, which is characterized in that the voltage-stabilized power supply circuit is using switch electricity
Source voltage regulator circuit.
5. RS-485 communication system according to claim 1, which is characterized in that the RS-485 host node includes RS-
485 concentrators, collector, copy controller and communication interface converter.
6. RS-485 communication system according to claim 5, which is characterized in that the RS-485 concentrator, collector
Utilities Electric Co., Running-water Company, gas company or heat supply company are come from copy controller.
7. RS-485 communication system according to claim 1, which is characterized in that the RS-485 child node includes RS-
485 ammeters, RS-485 water meter, RS-485 gas meter and RS-485 hotlist.
8. RS-485 communication system described in any one of -3 according to claim 1, which is characterized in that every road RS-485
Host node switches relay by signal and is connected to the host node automatic switchover of highest priority when carrying out data acquisition
RS-485 child node route disconnects the connection of other RS-485 host nodes, realizes the isolation of RS-485 bus physical, while lighting correspondence
Indicator light bright prompt connection and communications status, and power to external RS-485 equipment.
9. RS-485 communication system according to claim 1, which is characterized in that the range of the turn-off delay time Ts is
30~600s.
10. RS-485 communication system according to claim 1, which is characterized in that the range of the power supply delay time Tp
For 30~600s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820626588.5U CN208337601U (en) | 2018-04-28 | 2018-04-28 | A kind of RS-485 communication system with the double time controls of priority |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820626588.5U CN208337601U (en) | 2018-04-28 | 2018-04-28 | A kind of RS-485 communication system with the double time controls of priority |
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| CN208337601U true CN208337601U (en) | 2019-01-04 |
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| CN201820626588.5U Active CN208337601U (en) | 2018-04-28 | 2018-04-28 | A kind of RS-485 communication system with the double time controls of priority |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2018
- 2018-04-28 CN CN201820626588.5U patent/CN208337601U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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