CN103425611A - Serial communication method for field of metering - Google Patents
Serial communication method for field of metering Download PDFInfo
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- CN103425611A CN103425611A CN2013101888684A CN201310188868A CN103425611A CN 103425611 A CN103425611 A CN 103425611A CN 2013101888684 A CN2013101888684 A CN 2013101888684A CN 201310188868 A CN201310188868 A CN 201310188868A CN 103425611 A CN103425611 A CN 103425611A
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Abstract
The invention discloses a serial communication method for the field of metering. The serial communication method is applied to reading, writing and broadcasting operations among a master device and slave devices in electric energy metering, wherein the master device and the slave devices are in communication through a signal frame. The signal frame comprises a frame header, control information, operation target addresses, a data section and checking information, wherein the control information includes operation commands and slave device address information. By the method, the master device can control as many as four slave devices, different control operations can be performed, the information is exchanged at lower cost, and data interchange is accelerated.
Description
[technical field]
The invention belongs to communication technique field, refer to especially the means of communication between microcontroller in the electric energy metrical field (MCU) and electric energy computation chip.
[background technology]
In non-SOC electric energy metrical application system, single-phase electric energy meter can consist of microcontroller (MCU) and a single-phase measurement chip and other device or circuit, and the three phase metering electric energy meter can consist of microcontroller and three or four single-phase measurement chips and other device or circuit.And the communication modes between microcontroller and computation chip has three kinds, UART, SPI and single line.
The characteristics of UART mode are: full duplex, speed are slow, but only need two lines just can realize communication;
The characteristics of SPI mode are: full duplex, speed are fast, but need four lines could realize multi computer communication;
The characteristics of single line mode are: only need single line, and single work, but to the having relatively high expectations of MCU and programming, easily frame losing.
At present comparatively general what just adopt be the UART mode to industry, and by the design communications protocol with the raising communication speed.
MCU has integrated two kinds to the operation of computation chip: write some address date and read some address date.
Generally writing some address date is function and the calibration in order to configure computation chip, and in same application, each calibration data from equipment are different, but configuration data all is consistent, and for the write operation of configuration data, can write with broadcast.And the calibration data amount is less, general need configure once after resetting, so the write operation workload is less.
Reading some address date is that renewal speed is very fast, need to frequently read, and data volume is larger in order to read effective value data and performance number data etc., and each is different from equipment, for read operation, need to support a large amount of read operations.
To sum up, can find out that MCU also can be divided into function the operation of computation chip: read operation, write operation and broadcast operation.And in operation, the address realm used is no more than 12, and it is 32 that data are all unified.
In actual applications, the single-phase electric energy metrology applications mainly contains following two kinds: i.e. phase three-wire three electric energy metrical application and the application of three-phase and four-line electric energy metrical, so from equipment usually between 1～4, inoperation are 4 at most.Here saidly from equipment, refer to electric energy computation chip, its network in 220V, and and MCU between must be by light-coupled isolation.
In recent years, be subject to the impact of the factors such as power industry overall development and national upgrading urban and rural power grids, electric energy meter becomes in China's instrument industry and increases one of industry the most rapidly.China has formed suitable production scale and research and development ability at present, become the global electric energy meter production base, wherein the major product such as electronic electric energy meter and the intelligent electric energy meter has reached or has approached developed country's technical standard, production and research and development ability can meet the demand of different international markets, have stronger international competitiveness.Along with State Grid's system Construction turns to electrical network by power supply, domestic electric energy meter is changed market and is kept stable.2010, Chinese electric energy meter output was 8943.6 ten thousand, increases by 11.2% on a year-on-year basis.The first half of the year in 2011, this numerical value has reached 4906.1 ten thousand, continues to continue to increase rapidly.Expect 2015, Chinese electric energy computation chip market scale will reach 1.7 hundred million.Therefore, be necessary in fact to provide a kind of main equipment of the UART of utilization communication modes and the means of communication from equipment, thus can control by a MCU a plurality of from equipment, thereby can reduce the cost of hardware and promote the efficiency of communication.
[summary of the invention]
The object of the present invention is to provide a kind of single-phase measurement or three phase metering use in a kind of main equipment and the means of communication from equipment, to realize main equipment, can control a plurality of from equipment, and realize information interaction with less cost, and can improve data interaction speed.
For achieving the above object, implement the serial port communication method for metering field of the present invention, be applied in electric energy metrical main equipment and from the reading and writing between equipment and broadcast operation, this main equipment with carry out communication from equipment by signal frame, this signal frame comprises frame head, control information, Action Target address, data segment and check information, wherein control information comprise operational order with from device address information.
According to above-mentioned principal character, the signal frame length that this main equipment sends is 8 bytes, and the length of frame head, control information, Action Target address, check information is respectively 1 byte, and data segment, length is 4 bytes.
According to above-mentioned principal character, the operational order of control information is two, corresponding to the read operation from equipment, write operation and broadcast operation with main equipment.
According to above-mentioned principal character, control information from device address information, be two, control at most 4 from equipment.
According to above-mentioned principal character, high 4 information of remaining 4 the deposit operation destination addresses of control information, and the least-significant byte information of deposit operation destination address in the Action Target address.
According to above-mentioned principal character, at main equipment when from equipment, carrying out write operation, as from equipment, received correct signal frame, to main equipment, send an acknowledgement frame, this acknowledgement frame comprises frame head, control information, address information, check information, and part corresponding in the frame that wherein frame head, control information, address information send with main equipment is identical.
According to above-mentioned principal character, at main equipment when from equipment, carrying out read operation, the data length of first byte of the data segment of the signal frame that main equipment sends for starting to read continuously from the Action Target address.
According to above-mentioned principal character, at main equipment when from equipment, carrying out read operation, as from equipment, received correct signal frame, to main equipment, send an acknowledgement frame, this acknowledgement frame comprises frame head, control information, length information, check information, and in the frame that the frame head of this acknowledgement frame, control information, length information send with main equipment, corresponding part is identical.
According to above-mentioned principal character, main equipment with from equipment by the communication of UART mode, adopt two connections, every circuit is provided with an optocoupler.。
Compared with prior art, utilize method of the present invention, main equipment can be controlled and reach 4 from equipment, and realizes different control operations realizing information interaction with less cost, and improves data interaction speed.
[accompanying drawing explanation]
Fig. 1 implements configuration diagram of the present invention in the application of three-phase and four-line electric energy metrical.
[embodiment]
Refer to shown in Fig. 1, for in the application of three-phase and four-line electric energy metrical, implementing configuration diagram of the present invention, in concrete application, a main equipment (MCU, microcontroller) with the UART communication modes, control at most to 4 from equipment (being computation chip) simultaneously, and main equipment and from equipment by light-coupled isolation, in figure, RX refers to that main equipment receives and sends from equipment, TX refers to main equipment and sends and receive from equipment.
As realized the control from equipment, main equipment realizes carry out the frame that read/write/broadcast operation is all 8 bytes by length from equipment, only these 8 bytes just can realize utilizing the UART communication interface of a main equipment control maximum four from equipment.Wherein the structure of the frame of these 8 bytes is as shown in table 1.
Table 1: 8 byte frames of outside MCU to sending from equipment during read/write/broadcast operation
The frame of these 8 bytes comprises frame head, control information, Action Target address, data segment and check information totally five parts.Wherein data segment is 4 byte lengths.
Frame head means the beginning of frame data.Here defining frame head length is 1 byte, is 0xFE.
The particular content of control information is as shown in table 2, wherein:
Operational order: read operation, write operation and broadcast operation take 2;
From device address: maximum 4 from equipment, get final product so only need 2 from device address;
Be left the high 4 of 4 deposit operation destination addresses.
Table 2: the content of control information
The least-significant byte of Action Target address is placed in the Action Target address, because target register address is 12 bit wides, lowers 8 in the Action Target address, and that Gao Siwei is placed on the free time of control information part is high four.So can profit take full advantage of the space of control information, thereby be the length of a byte of frame length saving.
Below in conjunction with main equipment to being write from equipment, read, the information of the frame that sends during broadcast operation and describing respectively from the frame structure of equipment feedack.
During write operation, main equipment needs 8 byte frames to the write operation of an address in equipment, and the frame structure that sends and respond is respectively as shown in table 3 table 4.For ease of understanding, the B2 B3 of control information is all with 00 expression, mean to be numbered 00 from operate.The B0 B1 of control information is 01 expression write operation.
Table 3: during write operation, outside MCU is to the byte frame structure (B7:B0) sent from equipment
And the acknowledgement frame sent from equipment to main equipment during write operation thes contents are as follows:
Table 4: the acknowledgement frame (B7:B0) sent to outside MCU from equipment during write operation
Write operation once can only be write destination address data.If do not receive correct frame from equipment, will can not send and reply.
The outside MCU of read operation needs 8 byte frames to the read operation of continuous a plurality of addresses in equipment, sends and responds respectively as shown in table 5 table 6.
Table 5: during read operation, outside MCU is to the byte frame structure (B7:B0) sent from equipment
The acknowledgement frame particular content sent to outside MCU from equipment during read operation is as follows:
Table 6: the acknowledgement frame (B7:B0) sent to outside MCU from equipment during read operation
255 destination address data are read in read operation once multipotency.If do not receive correct frame from equipment, will can not send and reply.
During the broadcast write operation, outside MCU is as shown in table 7 to the content of 8 byte frames of the broadcast write operation of an address in equipment:
During table 7 broadcast write operation, outside MCU is to the byte frame structure (B7:B0) sent from equipment
Broadcast is during write operation, from equipment without to main equipment, sending acknowledgement frame, to avoid occurring communication contention aware.
From above description, can find out, main equipment sends to from the frame length of equipment and is 8 bytes, comprises frame head, control information, Action Target address, data segment and check information totally five parts.And the signal frame length difference of feeding back from equipment, information is also different.The write operation acknowledgement frame comprises: frame head, control information, address information, check information, and the read operation acknowledgement frame comprises frame head, control information, length information, check information, and the broadcast read operation does not have acknowledgement frame.And consistent with the appropriate section that main equipment is write the transmission frame from the frame head of writing acknowledgement frame, control information, the address information of equipment feedback.The appropriate section that the frame head, control information, length information of reading acknowledgement frame and main equipment are read the frame that sends is consistent.
Below in conjunction with Fig. 1, the embodiment of the present invention at three-phase and four-line electric energy metrical in electric system is described.Be divided into three parts from device address in concrete application: configuration register, correcting register, effective value performance number register.General configuration register can configure by broadcast mode.Correcting register needs write operation one by one.Effective value performance number register can be by batch read operation readback data.To the table that is described as follows from device configuration register, correcting register and effective value performance number register.
| From device configuration register | Address (HEX) | Explanation | Default value |
| RAM_REG_AASYS | 180 | System control register | 00000004 |
| … | … | ? | ? |
| From the equipment calibration register | Address (HEX) | Explanation | Default value |
| RAM_CFG_CALFI | 126 | First-harmonic effective value correcting register | 0 |
| … | … | ? | ? |
Main equipment is by the broadcast mode initialization from equipment, and as toward system control register 0x180, write 0x00000008, main business transmission Frame: FE 10 80 08 00 00 00 9C that establish, do not need to respond from equipment.
Main equipment is read 12 data such as second average measurement signal (M) effective value from equipment 2.Start address is 0x117, sends Frame: FE 19 17 0C 00 00 00 F8.From the correct reception of equipment 2, send the data check of 12 32 of FE 19 17 0C.If wrong nonreply frame.
Main equipment sends the fundamental current effective value order of proofreading and correct from equipment 2, and corrected value is 0x01234567, and fundamental current effective value correcting register address 0x126 sends FE 1C 26 67 45 23 01 22.Send FE 1C 26 F2 from the correct reception of equipment 2.If wrong nonreply frame.
Compared with prior art, the present invention utilize the general UART communication port of a main equipment (MCU) control maximum four from equipment, and each from equipment, with the hardware of the communication of MCU, to be connected be that uart two lines connect, only need two optocouplers, realize minimum optocoupler quantity, reduce hardware cost.Simultaneously, utilize the method, MCU carries out read/write/broadcast write operation to the data of a 32bit in equipment all to be realized by 8 byte frames, and only these 8 bytes just can realize utilizing the general UART communication interface control of a MCU to reach four from equipment.Moreover, utilizing this method, broadcast write operation and batch read operation can reduce communication time, lower MCU pressure.
In the specific implementation, the method can be applicable to the design of single-phase measurement chip communication interface, and the single-phase measurement chip can be used for single-phase measurement table and three phase metering table.Utilize the method, can reduce MCU and from the optocoupler quantity between equipment, to reduce hardware cost.Simultaneously, so order reduces from the hardware UART agreement implementation complexity of equipment (being the single-phase measurement chip) from equipment to utilize 8 bytes realizations to utilize the general UART communication interface of a MCU to control maximum four, and saving is from equipment cost.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection domain of the appended claim of the present invention.
Claims (9)
1. the serial port communication method for metering field, be applied in electric energy metrical main equipment and from the reading and writing between equipment and broadcast operation, it is characterized in that: this main equipment with carry out communication from equipment by signal frame, this signal frame comprises frame head, control information, Action Target address, data segment and check information, wherein control information comprise operational order with from device address information.
2. the serial port communication method for metering field as claimed in claim 1, it is characterized in that: the signal frame length that this main equipment sends is 8 bytes, the length of frame head, control information, Action Target address, check information is respectively 1 byte, and data segment, length is 4 bytes.
3. the serial port communication method for metering field as claimed in claim 1, it is characterized in that: the operational order of control information is two, corresponding to the read operation from equipment, write operation and broadcast operation with main equipment.
4. the serial port communication method for metering field as claimed in claim 1 is characterized in that: control information from device address information, be two, control at most 4 from equipment.
5. the serial port communication method for metering field as claimed in claim 1, is characterized in that: high 4 information of remaining 4 the deposit operation destination addresses of control information, and the least-significant byte information of deposit operation destination address in the Action Target address.
6. the serial port communication method for metering field as claimed in claim 1, it is characterized in that: at main equipment when from equipment, carrying out write operation, as from equipment, received correct signal frame, to main equipment, send an acknowledgement frame, this acknowledgement frame comprises frame head, control information, address information, check information, and part corresponding in the frame that wherein frame head, control information, address information send with main equipment is identical.
7. the serial port communication method for metering field as claimed in claim 1, it is characterized in that: at main equipment when from equipment, carrying out read operation, the data length of first byte of the data segment of the signal frame that main equipment sends for starting to read continuously from the Action Target address.
8. the serial port communication method for metering field as claimed in claim 7, it is characterized in that: at main equipment when from equipment, carrying out read operation, as from equipment, received correct signal frame, to main equipment, send an acknowledgement frame, this acknowledgement frame comprises frame head, control information, length information, check information, and in the frame that the frame head of this acknowledgement frame, control information, length information send with main equipment, corresponding part is identical.
9. the serial port communication method for metering field as claimed in claim 1 is characterized in that: main equipment with from equipment by the communication of UART mode, adopt two connections, every circuit is provided with an optocoupler.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105701052A (en) * | 2016-02-02 | 2016-06-22 | 合肥华凌股份有限公司 | Communication device and communication method used for serial port communication |
| CN106324337A (en) * | 2016-08-03 | 2017-01-11 | 宁波三星医疗电气股份有限公司 | Electric quantity synchronous processing-based intelligent electric energy meter dual core communication method |
| CN108470013A (en) * | 2018-01-24 | 2018-08-31 | 中国科学院宁波材料技术与工程研究所 | A kind of SPI communication method for realizing double MCU data transmissions |
| CN109374841A (en) * | 2018-12-14 | 2019-02-22 | 安徽芯核防务装备技术股份有限公司 | A kind of method and apparatus of the interior inflammable volatilization gas concentration of monitoring of bus |
| CN109614358A (en) * | 2018-12-26 | 2019-04-12 | 苏州易美新思新能源科技有限公司 | A kind of implementation method of PCB signal control circuit |
| CN110221937A (en) * | 2019-06-05 | 2019-09-10 | 河南卫华重型机械股份有限公司 | A kind of analytic method of communication between plates data |
| WO2021196931A1 (en) * | 2020-04-01 | 2021-10-07 | 华为技术有限公司 | Communication method, apparatus and system for power line communication system |
| CN114466045A (en) * | 2022-02-10 | 2022-05-10 | 武汉中旗生物医疗电子有限公司 | SPI communication method, monitor and medium |
| FR3133965A1 (en) * | 2022-05-24 | 2023-09-29 | Sagemcom Energy & Telecom Sas | METHOD FOR CALCULATING QUALIMETRIC DATA, QUALIMETRY DEVICE, COUNTER AND SYSTEM IMPLEMENTING SAID METHOD |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105701052A (en) * | 2016-02-02 | 2016-06-22 | 合肥华凌股份有限公司 | Communication device and communication method used for serial port communication |
| CN106324337A (en) * | 2016-08-03 | 2017-01-11 | 宁波三星医疗电气股份有限公司 | Electric quantity synchronous processing-based intelligent electric energy meter dual core communication method |
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| CN110221937A (en) * | 2019-06-05 | 2019-09-10 | 河南卫华重型机械股份有限公司 | A kind of analytic method of communication between plates data |
| WO2021196931A1 (en) * | 2020-04-01 | 2021-10-07 | 华为技术有限公司 | Communication method, apparatus and system for power line communication system |
| CN114466045A (en) * | 2022-02-10 | 2022-05-10 | 武汉中旗生物医疗电子有限公司 | SPI communication method, monitor and medium |
| FR3133965A1 (en) * | 2022-05-24 | 2023-09-29 | Sagemcom Energy & Telecom Sas | METHOD FOR CALCULATING QUALIMETRIC DATA, QUALIMETRY DEVICE, COUNTER AND SYSTEM IMPLEMENTING SAID METHOD |
| EP4283312A1 (en) * | 2022-05-24 | 2023-11-29 | Sagemcom Energy & Telecom SAS | Method for calculating qualimetric data, qualimetric device, and associated meter and system |
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Address after: Hangzhou City, Zhejiang province 310051 Binjiang District Dangfeng Road No. 788 sea floor of Building 9 Patentee after: Hangzhou hi tech Limited by Share Ltd Address before: Hangzhou City, Zhejiang province 310051 Binjiang District Dangfeng Road No. 788 sea floor of Building 9 Patentee before: Wangao (Hangzhou) Technology Co.Ltd |