CN104601420A - Method for flexibly reading power station data by utilizing Modbus - Google Patents
Method for flexibly reading power station data by utilizing Modbus Download PDFInfo
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- CN104601420A CN104601420A CN201410844424.6A CN201410844424A CN104601420A CN 104601420 A CN104601420 A CN 104601420A CN 201410844424 A CN201410844424 A CN 201410844424A CN 104601420 A CN104601420 A CN 104601420A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention discloses a method for flexibly reading power station data by utilizing Modbus; the method comprises the following steps: only appointing a power station address and functional codes to a communication protocol by a power station terminal; keeping an 'open' state to a starting address and a register number in query data; calculating a check code based on the power station address, the functional codes, the starting address and the register number in the query data; comparing the calculated check code with a check code in the query data; sending corresponding data to a remote control terminal if the check codes are identical; otherwise, not feeding back data. The method for flexibly reading power station data by utilizing Modbus has the advantages that the program at the power station terminal does not need any adjustment whenever the remote terminal needs to be tested, data of only a certain one or certain registers in the data field is read out, or data needs to be read out by segments when finding frequent data errors. The communication and data reading are flexible; the error rate is reduced; the manpower, material resource and financial resource are saved.
Description
Technical field
The present invention relates to a kind of method of flexible reading power station data, be specifically related to a kind of method that Modbus of utilization reads power station data flexibly.
Background technology
Because user is to the demand of the high automation degree in power station, the control system in power station needs to carry out communication with the surveillance equipment of remote port, can be monitored data and the operating condition in power station by the surveillance equipment of remote port.
Usual employing Modbus communications protocol, the surveillance equipment of remote port and power station end realize information exchange with the form of question-response (communication format is shown in following subordinate list), reach the object of remote monitoring.
Subordinate list power station end and remote port data communication form
Way in the past: power station end and remote port clearly arrange address, power station, function code, start address, register number, check code to communications protocol; The data that the data that power station termination receives and both sides clearly arrange are identical, and power station end sends feedback data to far controlling end.Address, power station in feedback data, function code, byte number and register data address are all clear and definite, and check code calculates according to the address, power station in feedback data, function code, byte number and register data value etc.The data of final composition feedback send to far controls end.
When remote port needs the data of some or certain the several register in the read-only section of fetching data, power station end and remote port both sides need again clearly to arrange start address, register number, check code to communications protocol.The program that power station end reads needs to do corresponding adjustment, adds workload, needs the manpower of at substantial (engineer is to on-the-spot), material resources (needing computer, commissioning device), financial resources (travel charge of going on business).When the data of remote port inquiry are longer, ' check code ' of the data of power station end feedback easily makes mistakes.The data that remote port is read are wrong, produce the error message of miscommunication.
Summary of the invention
A kind of Modbus of utilization is the object of the present invention is to provide to read the method for power station data flexibly, the method uses Modbus to read power station data flexibly, mainly break former power station end with far control and hold both sides clearly to inquire ' the address, power station fixed in data, function code, start address, register number, check code ' form, power station end holds both sides clearly to inquire ' address, power station in data with far control, function code ', to the start address in inquiry data, register number keeps ' opening ' state, check code is according to address, power station, function code, start address, register number calculates.
The technical solution adopted in the present invention is: a kind of Modbus of utilization reads the method for power station data flexibly, it is characterized in that method step is as follows:
(1) power station end and remote port only arrange address, power station, function code to communications protocol; ' opening ' state is kept to the start address in inquiry data, register number;
(2) according to the address, power station in inquiry data, function code, start address, register number calculation check code, the check code calculated is compared with the check code in inquiry data;
(3) check code identical (namely correct) then sends corresponding data to far controlling end, otherwise not feedback data, guarantee that far controlling end can read arbitrarily some or a few data.
In the data of feedback of the present invention, byte number and register address change along with the difference of the register number in inquiry data and start address.
Start address in inquiry data of the present invention, register number keep ' opening ' state, and check code calculates according to address, power station, function code, start address, register number.
Advantage of the present invention is: no matter remote port need to test, the data of some or certain several register in the read-only section of fetching data, or find that data errors more frequently needs segmentation to read data, the program of power station end does not need to make any adjustments.Communication, read-fetch data flexibly, reduce the error rate, save human and material resources, financial resource.
Accompanying drawing explanation
Fig. 1 is that power station of the present invention termination transmits and receives data flowchart.
Embodiment
As shown in Figure 1, the present invention comes work and enforcement like this, and a kind of Modbus of utilization reads the method for power station data flexibly, it is characterized in that method step is as follows:
(1) power station end and remote port only arrange address, power station, function code to communications protocol; ' opening ' state is kept to the start address in inquiry data, register number;
(2) according to the address, power station in inquiry data, function code, start address, register number calculation check code, the check code calculated is compared with the check code in inquiry data;
(3) check code identical (namely correct) then sends corresponding data to far controlling end, otherwise not feedback data, guarantee that far controlling end can read arbitrarily some or a few data.
Claims (1)
1. utilize Modbus to read a method for power station data flexibly, it is characterized in that method step is as follows:
(1) power station end and remote port only arrange address, power station, function code to communications protocol; ' opening ' state is kept to the start address in inquiry data, register number;
(2) according to the address, power station in inquiry data, function code, start address, register number calculation check code, the check code calculated is compared with the check code in inquiry data;
(3) check code identical (namely correct) then sends corresponding data to far controlling end, otherwise not feedback data, guarantee that far controlling end can read arbitrarily some or a few data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410844424.6A CN104601420A (en) | 2014-12-31 | 2014-12-31 | Method for flexibly reading power station data by utilizing Modbus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410844424.6A CN104601420A (en) | 2014-12-31 | 2014-12-31 | Method for flexibly reading power station data by utilizing Modbus |
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| Publication Number | Publication Date |
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| CN104601420A true CN104601420A (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410844424.6A Pending CN104601420A (en) | 2014-12-31 | 2014-12-31 | Method for flexibly reading power station data by utilizing Modbus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278918A (en) * | 2015-10-15 | 2016-01-27 | 珠海格力电器股份有限公司 | Reading method of register and register using reading method |
| CN105388833A (en) * | 2015-11-07 | 2016-03-09 | 江西清华泰豪三波电机有限公司 | Method for obtaining power station ID flexibly by employing S7 200PLC |
| CN106911646A (en) * | 2015-12-23 | 2017-06-30 | 重庆川仪自动化股份有限公司 | Communications protocol and communication system |
| CN114391234A (en) * | 2020-08-06 | 2022-04-22 | 华为数字能源技术有限公司 | Data acquisition method and device, Modbus system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354175A (en) * | 2011-08-01 | 2012-02-15 | 李遇浦 | Remote I/O (input/output) control system of Modbus fieldbus DI-16-route monitor |
| CN103402083A (en) * | 2013-08-19 | 2013-11-20 | 中国能源建设集团广东省电力设计研究院 | Video monitoring method and video monitoring system of direct-current power transmission system |
| CN104065545A (en) * | 2014-06-27 | 2014-09-24 | 浙江大学 | RS485 bus communication method based on Modbus protocol and power electronic system based on communication method |
-
2014
- 2014-12-31 CN CN201410844424.6A patent/CN104601420A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354175A (en) * | 2011-08-01 | 2012-02-15 | 李遇浦 | Remote I/O (input/output) control system of Modbus fieldbus DI-16-route monitor |
| CN103402083A (en) * | 2013-08-19 | 2013-11-20 | 中国能源建设集团广东省电力设计研究院 | Video monitoring method and video monitoring system of direct-current power transmission system |
| CN104065545A (en) * | 2014-06-27 | 2014-09-24 | 浙江大学 | RS485 bus communication method based on Modbus protocol and power electronic system based on communication method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278918A (en) * | 2015-10-15 | 2016-01-27 | 珠海格力电器股份有限公司 | Reading method of register and register using reading method |
| CN105278918B (en) * | 2015-10-15 | 2017-12-08 | 珠海格力电器股份有限公司 | The read method of register and the register using the read method |
| CN105388833A (en) * | 2015-11-07 | 2016-03-09 | 江西清华泰豪三波电机有限公司 | Method for obtaining power station ID flexibly by employing S7 200PLC |
| CN105388833B (en) * | 2015-11-07 | 2018-07-06 | 江西清华泰豪三波电机有限公司 | A kind of method that power station ID is flexibly obtained by S7 200PLC |
| CN106911646A (en) * | 2015-12-23 | 2017-06-30 | 重庆川仪自动化股份有限公司 | Communications protocol and communication system |
| CN114391234A (en) * | 2020-08-06 | 2022-04-22 | 华为数字能源技术有限公司 | Data acquisition method and device, Modbus system and storage medium |
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Application publication date: 20150506 |
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