LS/T 1812-2017Grain and oil storage. Monitoring and control system of stored-grain condition technical requirements for information exchange interface protocol (English PDF)

4.2 Information exchange control system information exchange mode

The information exchange mode of the grain situation monitoring and control system is as follows.

a) The food situation monitoring system and other systems request service from the other party and call the other party's service interface;

b) The food condition monitoring system or other system responds to the request and returns structured data encapsulated with the data set to the other party.

5.1 Communication interface between the host computer and the extension

5.1.1 Byte Transfer Format

5.1.1.1 Serial Port Configuration

The grain inbound and outbound business information system generally consists of inbound and outbound registration, sample management, inspection management, measurement management, value warehouse management, and settlement management.

It consists of seven modules, such as statistical analysis, and the related modules are extensible, as shown in Table 1.

The serial port should be configured as follows.

a) 1 start position;

b) 8-bit data bits;

c) no check digits;

d) 1 stop position;

e) Baud rate.

Note. The value of the baud rate can be, but is not limited to, the following values (unit. Bps). 1200, 4800, 9600, etc.

Table 1 Data frame format

Field name code length/Byte Initial character 55HAAH55HAAH 4 Extension address KADDL 1 Control character Command 1 Data length Length 2 Data segment DataSegment L Verify CRC-16a 2 End character 16HE9H16HE9H 4 a where CRC-16 checksum data is all data from the start of the start to the check.

5.1.1.2 Ethernet Mode Configuration

The Ethernet configuration is as follows.

a) The IP address of the server and the IP address of the measurement and control extension are set to the same network segment;

b) server TCP port. 1238; UDP port. 1240;

c) The server sends various query commands in UPD broadcast mode. The target IP is all. 255.255.255.255; target port.

5000;

d) The measurement and control extension returns data in TCP mode, and the TCP port of the measurement and control extension. 3000.

5.1.1.3 Data frame format

The data frame of the communication interface shall conform to the format of Table 1.

5.1.1.4 Command response time

The command response time (the time from the end of the command transmission to the receipt of the first byte of the extension return data) is less than or equal to.200ms.

5.1.2 Communication format

5.1.2.1 Reading Extension Status Commands

a) The upper computer read extension status command shall be sent in the format of Table 2.

Table 2 Host computer read extension status command format

Start character KADDL (extension address) Command Length CRC-16 terminator Command=A0H, Length=0000H.

b) The extension shall return status data in the format of Table 3.

Table 3 Extension returns the extension status data format

Start character KADDL (extension address) Command Length State CRC-16 terminator Command=80H, Length=0002H. State is the state data segment, which occupies two bytes.

5.1.2.2 Reading the temperature and humidity outside the warehouse

a) The upper computer read temperature and humidity instructions should be sent according to the format of Table 4.

Table 4 The upper computer reads the temperature and humidity command format outside the warehouse

Start character KADDL (extension address) Command Length CRC-16 terminator Command=A1H, Length=0000H.

b) The extension shall return the temperature and humidity data outside the warehouse in the format of Table 5.

Table 5 Extension return temperature and humidity data format

Start character KADDL (extension address) Command Length Cwtl Cwth Cwsl Cwsh CRC-16 terminator Command=81H, Length=0004H. Cwtl, Cwth, Cwsl, and Cwsh together form a data segment. Cwtl, Cwth is the warehouse External temperature, where Cwtl is the low byte and Cwth is the high byte. Cwsl and Cwsh are the humidity outside the warehouse, where Cwsl is the low byte and Cwsh is High byte.

5.1.2.3 Reading the temperature and humidity in the warehouse

a) The upper computer read temperature and humidity instructions in the warehouse shall be sent in the format of Table 6.

Table 6 The upper computer reads the temperature and humidity command format in the warehouse

Start character KADDL (extension address) Command Length CRC-16 terminator Command=A2H, Length=0000H.

b) The extension shall return the temperature and humidity data in the warehouse according to the format of Table 7.

Table 7 Extension return temperature and humidity data format

Start character KADDL (extension address) Command Length DataSegment CS-16 terminator Cnt1l Cnt1h Cns1l Cns1h CntNlCntNh CnsNlCnsNh Command=82H, Length=××××H. CntNl and CntNh are the Nth temperature detection point values in the warehouse, wherein CntNl is the low byte and CntNh is the high byte. CnsNl and CnsNh are the Nth bin humidity detection point values, where CnsNl is a low word.

Section, CnsNh is the high byte.

5.1.2.4 Reading the grain temperature

a) The upper machine reading grain temperature command shall be sent in the format of Table 8.

Table 8 upper computer read grain reactor temperature command format

Start character KADDL (extension address) Command Length CRC-16 terminator Command=A3H, Length=0000H.

b) The extension shall return the grain temperature data in the format of Table 9 or Table 10.

Table 9 Data format of extension return grain temperature 1

Start character KADDL (extension address) Command Length DataSegment CRC-16 terminator L1 T0l T0h Tnl Tnh Ln T0l T0h Tnl Tnh Command=53H; Length=××××H. Ln is the number of the nth sensor cable and is two bytes long. Tnl, Tnh is the nth detection point value of a cable. The detection points of the same cable are sorted from top to bottom, where Tnl is a low word.

Section, Tnh is the high byte.

Table 10 Data format of extension return grain temperature 2

Start character KADDL (extension address) Command Length DataSegment CRC-16 terminator T0l T0h Tnl Tnh Command=83H; Length=××××H. Tnl, Tnh is the nth temperature detection point value of a bin, where Tnl is low Byte, Tnh is the high byte.

5.1.2.5 Reading the information data of stored grain pests in the warehouse

a) The upper computer will read the stored grain pest information data instructions in the warehouse and send it according to the format of Table 11.

Table 11. The upper computer reads the stored grain pest information data instruction format

Start character KADDL (extension address) Command pest branch number m CRC-16 terminator Command=A4H. Pest branch number = × × × × H.

b) The extension shall return other food information data in the format of Table 12.

Table 12. The information format of the stored grain pest information in the warehouse

Start character KADDL (extension address) Command Length DataSegment CRC-16 terminator Number of insects I0 In Insect branch number m Command=84H;Length=××××H;In indicates that a certain warehouse m number insect brancher has insects falling in at time, its length it is 7 bytes and the format is the same as the first 7 bytes of the DS1307 time. If the number of worms is 0, there is no I0 to In field.

5.1.2.6 Read other food information data

The reading of other food information data shall be in the format specified below.

a) The host computer reads other grain information data instructions should be sent according to the format of Table 13.

Table 13 The upper computer reads other grain information data command format

Start character KADDL (extension address) Command Length CRC-16 terminator the value of Command ranges from A5H to BFH, a grain control message uses a command control, and so on. Length =0000H.

b) The extension shall return other food information data in the format of Table 14.

Table 14 Extension returns other food information data format

Start character KADDL (extension address) Command Length DataSegment CRC-16 terminator X0l X0h Xnl Xnh the value of Command ranges from 85H to 9FH, a grain control message uses a command control, and so on. Length= ××××H. Xnl and Xnh are the nth grain information detection point value of a certain warehouse, where Xnl is the low byte and Xnh is the high byte.

5.1.2.7 Calculation formula for food information data

a) Temperature calculation formula. (Tnh × 256 Tnl)/10, retaining one decimal place;

b) Humidity calculation formula. (Snh × 256 Snl) /10, one decimal place is reserved;

c) Calculation formula for other food information data. (Xnh×256 Xnl)/10, one decimal place is reserved;

d) If there is no data reply at a certain detection point, the open circuit is 7777H and the short circuit is 8888H;

e) The value of the blank point is 9999H.

5.1.2.8 Grain control

a) The upper machine reads the grain control equipment status information data instructions should be sent according to the format of Table 15.

Table 15 The upper computer reads the grain control device status information data command format

Start character KADDL (extension address) Command Length CRC-16 terminator Command=C1H, Length=0000H.

b) The extension shall return the status information data of the grain control equipment in accordance with the format of Table 16.

Table 16 Extension return status control equipment status information data format

Start character KADDL (extension address) Command Length DataSegment CRC-16 terminator EC0 ECn Command=C2H, Length=××××H. ECn is the current state of the nth device.

c) The instructions for setting the status of the grain control equipment on the host computer shall be sent in the format of Table 17.

Table 17 The upper computer sets the grain control device status command format

Start character KADDL (extension address) Command Length DataSegment CRC-16 terminator EC0 ECn Command=C3H, Length=××××H. ECn is the state that the nth device will be set.

5.2 Information exchange between the grain monitoring and control system and other systems

5.2.1 Data exchange interface provided by the grain and oil warehouse management information system

5.2.1.1 Obtaining the interface definition of the library point basic information data method.

a) Service requester. grain situation measurement and control system;

b) Service responder. Grain and Oil Warehouse Management Information System;

c) Method name. Get_DepotInfoData;

d) return type. composite type;

e) parameters should refer to the requirements of Table 18;

Table 18 Obtaining warehouse basic information data method parameter table

Serial number parameter short name data type data format 1 library point code kddm character type a.3

f) The return value should refer to the requirements of Table 19.

Table 19 Get the library point basic information data method return value table

No. Parameter Short Name Data Type Data Format Remarks 1 affiliate company organization code ssqyzzjgdm character type a.9

2 Corporate social credit code ssqytyshxydm character type a.18

3 Company name ssqymc Character type a.50 4 library point code kddm character type a.3 5 library point name kdmc character type a.50