CN107807600A - A kind of electromagnetic flowmeter control system and control method based on 485 communications - Google Patents
A kind of electromagnetic flowmeter control system and control method based on 485 communications Download PDFInfo
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- CN107807600A CN107807600A CN201711272119.4A CN201711272119A CN107807600A CN 107807600 A CN107807600 A CN 107807600A CN 201711272119 A CN201711272119 A CN 201711272119A CN 107807600 A CN107807600 A CN 107807600A
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- valve
- electromagnetic flowmeter
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- control system
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- 238000004891 communication Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/048—Monitoring; Safety
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
The present invention relates to a kind of electromagnetic flowmeter control system and control method based on 485 communications, control system is that computer is bi-directionally connected by Serial Port Line and 485 buses with control device, electromagnetic flowmeter is unidirectionally connected with control device, control device is bi-directionally connected by the valve of 4 20mA analog signals and electromagnetic flowmeter, the arrange parameter in electromagnetic flowmeter control system, control instruction is sent to control device according to 485 communications protocol forms, control instruction is sent to by valve by control device again, the real time data of electromagnetic flowmeter is fed back into electromagnetic flowmeter control system by control device, real time data and arrange parameter are instant to be compared, in defined scope, valve automatically turns on, one-touch normal operation, otherwise, Realtime Alerts, valve is closed automatically.Beneficial effect is in the case of nobody, and temperature is beyond the mark, arrange parameter is automatically performed, and valve is closed automatically, i.e., safety saves raw material and cost again；Realtime Alerts, conveniently take emergency measures, one-touch operation after recovery.
Description
Technical field
The present invention relates to a kind of electromagnetic flowmeter control system, more particularly to a kind of electromagnetic flowmeter based on 485 communications
Control system and control method.
Background technology
With the arrival of information age, the every field of modern society all be unable to do without processing, monitoring and the control of data.Mesh
Preceding magnetic flowmeter serial communication is only able to display reception with sending specific data, can not be to the data of specific electromagnetic flowmeter
Make further analysis and processing, the line fault occurred in use to scene, superelevation high temperature boundary, filling liquid
The problems such as being finished can not judge and remind in time, while can only check that field data can not further be controlled to its equipment
System, easy waste of manpower, material resources and cost of material, it is easier to trigger accident.Therefore it provides one kind can determine whether and handle reception
Data, and then connected equipment is controlled, it has been the inexorable trend of technology development.
The content of the invention
In view of the problem of prior art is present, the present invention provides a kind of electromagnetic flowmeter control system based on 485 communications
And control method, it can determine whether and handle reception data, and then connected equipment is controlled, and by data in the form of metric
Show so that scene is checked, with eye-catching written form display alarm information to take emergency measures at scene, specific skill
Art scheme is a kind of electromagnetic flowmeter control system based on 485 communications, including computer, control device, it is characterised in that：Meter
Calculation machine is bi-directionally connected by Serial Port Line and 485 buses with control device, and electromagnetic flowmeter is unidirectionally connected with control device, and control device passes through
The valve of 4-20mA analog signals and electromagnetic flowmeter is bi-directionally connected.
Control method comprises the following steps, and 1）, start, automatic detection with serial ports and can select serial ports, can not be again after selection
Secondary change, while automatic detection circuit failure, Realtime Alerts, after alarm recovers, one-touch operation；2）, set fluid density join
Count, when secondary adding amount, valve opening, be provided with, automatically open up valve；3）, judge whether reactor temperature exceedes temperature
Boundary, "No", normal operation, "Yes" Realtime Alerts, valve are closed automatically, reactor temperature Temperature fall；4）, judge should add
Whether fluid injection body is added in real time, "Yes", normal operation, "No", Realtime Alerts, and valve is closed automatically, adds respective liquid；5）、
Judge whether reactor temperature exceedes temperature limit, "No" after cooling, valve automatically turns on, one-touch normal operation, or adds
Judge to answer whether filling liquid adds in real time after adding, "Yes", valve automatically turns on, one-touch normal operation；6）, arrange parameter it is complete
Cheng Hou, it is automatically stopped； 7）, again fill, repeat 1-5 steps.
The invention has the advantages that in the case of nobody, temperature is beyond the mark or arrange parameter is automatically performed, valve
Automatic to close, i.e., safety saves raw material and cost again；Realtime Alerts, conveniently take emergency measures, one-touch operation after recovery.
Brief description of the drawings
Fig. 1 is the device connection diagram of the present invention；
Fig. 2 is the control flow chart of the present invention.
Embodiment
More detailed elaboration is carried out to present disclosure below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of electromagnetic flowmeter control system based on 485 communications, including main frame（Model）, behaviour
Device is controlled, main frame is bi-directionally connected by Serial Port Line and 485 buses with control device, and electromagnetic flowmeter unidirectionally connects with control device
Connect, control device is bi-directionally connected by the valve of 4-20mA analog signals and electromagnetic flowmeter.
As shown in Fig. 2 control method comprises the following steps,
1）, start, automatic detection with serial ports and can select serial ports, can not be changed again after selection, at the same automatic detection circuit therefore
Barrier, Realtime Alerts, after alarm recovers, one-touch operation；
2）, fluid density parameter is set, when secondary adding amount, valve opening, be provided with, automatically open up valve；
3）, judge reactor temperature whether exceed setting temperature limit, "No", normal operation, "Yes" Realtime Alerts, valve
It is automatic to close, reactor temperature Temperature fall；
4）, judge to answer whether filling liquid adds in real time, "Yes", normal operation, "No", Realtime Alerts, valve closes, adds automatically
Add respective liquid；
5）, judge whether reactor temperature exceedes temperature limit, "No" after cooling, valve automatically turns on, one-touch normal fortune
OK, or after addition judge to answer whether filling liquid adds in real time, "Yes", valve automatically turns on, one-touch normal operation；
6）, after the completion of arrange parameter, be automatically stopped；
7）, again fill, repeat 2-5 steps.
Principle：The arrange parameter in electromagnetic flowmeter control system, control instruction is sent according to 485 communications protocol forms
Control instruction is sent to valve to control device, then by control device, electromagnetic flowmeter feeds back real time data by control device
To electromagnetic flowmeter control system, real time data and arrange parameter it is instant be compared, it is specified that in the range of, valve is opened automatically
Open, one-touch normal operation, otherwise, Realtime Alerts, valve is closed automatically, and is shown to electromagnetism in the form of the decimal system and word
On flowmeter system.
Claims (2)
1. a kind of electromagnetic flowmeter control system based on 485 communications, including computer, control device, it is characterised in that：Computer
It is bi-directionally connected by Serial Port Line and 485 buses with control device, electromagnetic flowmeter is unidirectionally connected with control device, and control device passes through 4-
The valve of 20mA analog signals and electromagnetic flowmeter is bi-directionally connected.
2. using a kind of control method of electromagnetic flowmeter control system based on 485 communications described in claim 1, its feature
It is：Control method comprises the following steps,
1）, start, automatic detection with serial ports and can select serial ports, can not be changed again after selection, at the same automatic detection circuit therefore
Barrier, Realtime Alerts, after alarm recovers, one-touch operation；
2）, fluid density parameter is set, when secondary adding amount, valve opening, be provided with, automatically open up valve；
3）, judge whether reactor temperature exceedes temperature limit, "No", normal operation, "Yes" Realtime Alerts, valve is automatic
Close, reactor temperature Temperature fall；
4）, judge to answer whether filling liquid adds in real time, "Yes", normal operation, "No", Realtime Alerts, valve closes automatically,
Add respective liquid；
5）, judge whether reactor temperature exceedes temperature limit, "No" after cooling, valve automatically turns on, one-touch normal fortune
OK, or after addition judge to answer whether filling liquid adds in real time, "Yes", valve automatically turns on, one-touch normal operation；
6）, after the completion of arrange parameter, be automatically stopped；
7）, again fill, repeat 1-5 steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272119.4A CN107807600A (en) | 2017-12-06 | 2017-12-06 | A kind of electromagnetic flowmeter control system and control method based on 485 communications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272119.4A CN107807600A (en) | 2017-12-06 | 2017-12-06 | A kind of electromagnetic flowmeter control system and control method based on 485 communications |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107807600A true CN107807600A (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711272119.4A Pending CN107807600A (en) | 2017-12-06 | 2017-12-06 | A kind of electromagnetic flowmeter control system and control method based on 485 communications |
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| CN (1) | CN107807600A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110930820A (en) * | 2019-12-12 | 2020-03-27 | 中环天仪股份有限公司 | HART bus protocol learning system |
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2017
- 2017-12-06 CN CN201711272119.4A patent/CN107807600A/en active Pending
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Application publication date: 20180316 |