Modbus Register Table (V. 7258)
MSD Series IAQ Monitor
Tongdy Sensing Technology Corp.
Mode: RTU (MSB First)
Baud Rate: 1-4800 2-9600 3-14400 4-19200 5-38400 6-56000 7-57600 8-115200
default: 2-9600bps
Start Bits: 1
Data Bits: 8
Stop Bits: 1 / 2 default : 1
Parity: None / Odd / Even default: None
Register Map
Support Function: 3 4 6 16
Starting Register Decimal | Data Description | Function | Read/Write | Data Length | Format | Decimals | Data Range Data Description | Default |
0/1050 | PM2.5 an hourly average measurements | 4 | R | 2 | Float-Big Endian | 1 | 0~1000.0μg∕m³ |
|
2/1052 | PM10 an hourly average measurements | 4 | R | 2 | Float-Big Endian | 1 | 0~1000.0μg∕m³ |
|
4/1054 | Temperature an hourly average measurements | 4 | R | 2 | Float-Big Endian | 2 | -20.00℃~60.00℃ |
|
6/1056 | Humidity an hourly average measurements | 4 | R | 2 | Float-Big Endian | 2 | 0~100.00% RH |
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8/1058 | CO2 an hourly average measurements | 4 | R | 2 | Float-Big Endian | 0 | 0～5,000ppm |
|
10/1060 | TVOC an hourly average measurements | 4 | R | 2 | Float-Big Endian | 3 | 0~ 3.575mg/m³ |
|
1062 | CO an hourly average measurements | 4 | R | 2 | Float-Big Endian | 1 | 0~ 500.0ppm |
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1064 | HCHO an hourly average measurements | 4 | R | 2 | Float-Big Endian | 3 | 0~ 2.89mg/m³ @-20℃ |
|
1066 | O3 an hourly average measurements | 4 | R | 2 | Float-Big Endian | 0 | 0~11561ug/m³ @-20℃ |
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12/1000 | PM2.5 one minute average measurements | 4 | R | 2 | Float-Big Endian | 1 | 0~1000.0μg∕m³ |
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14/1002 | PM10 one minute average measurements | 4 | R | 2 | Float-Big Endian | 1 | 0~1000.0μg∕m³ |
|
16/1004 | Temperature real-time measurements | 4 | R | 2 | Float-Big Endian | 2 | -20.00℃~60.00℃ |
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18/1006 | Humidity real-time measurements | 4 | R | 2 | Float-Big Endian | 2 | 0~100.00% RH |
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20/1008 | CO2 real-time measurements | 4 | R | 2 | Float-Big Endian | 0 | 0～5,000ppm |
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22/1010 | TVOC real-time measurements | 4 | R | 2 | Float-Big Endian | 3 | 0– 3.575mg/m³ |
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1012 | CO real-time measurements | 4 | R | 2 | Float-Big Endian | 1 | 0– 500.0ppm |
|
1014 | HCHO real-time measurements | 4 | R | 2 | Float-Big Endian | 3 | 0– 2.89mg/m³ @-20℃ |
|
1016 | O3 one minute moving average measurements | 4 | R | 2 | Float-Big Endian | 0 | 0– 11561ug/m³ @-20℃ |
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24/1100 | PM2.5 24-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 1 | 0~1000.0μg∕m³ |
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26/1102 | PM10 24-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 1 | 0~1000.0μg∕m³ |
|
28/1104 | Temperature 24-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 2 | -20.00℃~60.00℃ |
|
30/1106 | Humidity 24-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 2 | 0~100.00% RH |
|
32/1108 | CO2 24-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 0 | 0～5,000ppm |
|
34/1110 | TVOC 8-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 3 | 0– 3.575mg/m³ |
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1112 | CO 24-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 1 | 0– 500.0ppm |
|
1114 | HCHO 24-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 3 | 0– 2.89mg/m³ @-20℃ |
|
1116 | O3 24-hour moving average measurements | 4 | R | 2 | Float-Big Endian | 0 | 0– 11561ug/m³ @-20℃ |
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1300 | Primary pollutant 24-hour average measuring value（One of PM2.5/PM10/CO2/TVOC /CO/HCHO/O3）（Calculated based on 24-hour or 1-hour moving average measurements） | 4 | R | 2 | Float-Big Endian |
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1302 | Primary pollutant type（One of PM2.5/PM10/CO2/TVOC/CO/ HCHO/O3）（Calculated based on 24-hour or 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| 1-PM25, 2-PM10, 3-CO2; 4-TVOC, 5-CO, 6-HCHO, 7-O3 |
|
1303 | Index level of the primary pollutant（One of PM2.5/PM10 /CO2/TVOC/CO/HCHO/O3 ）. （Calculated based on 24-hour or 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| Level 1-Excellent Level 2-Good Level 3-Light pollution Level4-Medium pollution Level 5-Heavy pollution Level 6-Severe pollution |
|
1304 | AQI value of the primary pollutant（One of PM2.5/PM10/ CO2/TVOC/CO/HCHO/O3 ）. （Calculated based on 24-hour or 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| 0~500 |
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1320 | PM2.5 AQI value （Calculated based on 24-hour moving average measurements） | 4 | R | 1 | INT16 |
| 0~500 |
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1321 | PM10 AQI value （Calculated based on 24-hour moving average measurements） | 4 | R | 1 | INT16 |
| 0~500 |
|
1322 | CO2 AQI value （Calculated based on 24-hour moving average measurements） | 4 | R | 1 | INT16 |
| 0~500 |
|
1323 | TVOC AQI value （Calculated based on 24-hour moving average measurements） | 4 | R | 1 | INT16 |
| 0~500 |
|
1324 | CO AQI value （Calculated based on 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| 0~500 |
|
1325 | HCHO AQI value （Calculated based on 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| 0~500 |
|
1326 | O3 AQI value （Calculated based on 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| 0~500 |
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1350 | PM2.5 Pollution index level （Calculated based on 24-hour moving average measurements） | 4 | R | 1 | INT16 |
| 1~6 |
|
1351 | PM10 Pollution index level （Calculated based on 24-hour moving average measurements） | 4 | R | 1 | INT16 |
| 1~6 |
|
1352 | CO2 Pollution index level （Calculated based on 24-hour moving average measurements） | 4 | R | 1 | INT16 |
| 1~6 |
|
1353 | TVOC Pollution index level （Calculated based on 24-hour moving average measurements） | 4 | R | 1 | INT16 |
| 1~6 |
|
1354 | CO Pollution index level （Calculated based on 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| 1~6 |
|
1355 | HCHO Pollution index level （Calculated based on 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| 1~6 |
|
1356 | O3 Pollution index level （Calculated based on 1-hour moving average measurements） | 4 | R | 1 | INT16 |
| 1~6 |
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78 | 3 color LED status | 4 | R | 1 | INT16 |
| 0-OFF, 1-Green, 2-Yellow, 3-Red |
|
0 | Modbus Address | 3/6 | R/W | 1 | UINT16 |
| 1~247 | 1 |
1 | Modbus rate（bps）
| 3/6 | R/W | 1 | UINT16 |
| 1-4800, 2-9600, 3-14400, 4-19200, 5-38400, 6-56000, 7-57600, 8-115200 | 2 |
2 | Modbus Parity check bit | 3/6 | R/W | 1 | UINT16 |
| 1-NONE, 1STOP_BIT, 2-NONE, 2STOP_BIT, 3-Odd, 1STOP_BIT, 4-Even, 1STOP_BIT | 1 |
4 | Temperature correction value | 3/16 | R/W | 2 | Float-Big Endian | 2 | -3.0~3.0℃/-6.0~6.0F | -2.0 |
6 | Humidity correction value | 3/16 | R/W | 2 | Float-Big Endian | 2 | -5.0~5.0%RH | 0 |
14 | CO2 compensation value | 3/16 | R/W | 2 | Float-Big Endian | 0 | -300.0~300.0ppm | 0 |
In order to reserve the decimal part, the measuring value with decimal will be magnified 10/100/1000 times, marked as x10/x100/x1000.
Starting Register Decimal | Data Description | Function | Read/Write | Data Length | Format | Decimals | Data Range， Data Description | Default |
50/1175 | PM2.5 an hourly average measurements x10 | 4 | R | 1 | UINT16 | 1 | 0~10000 corresponding to 0~1000.0μg∕m³ |
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51/1176 | PM10 an hourly average measurements x10 | 4 | R | 1 | UINT16 | 1 | 0~10000 corresponding to 0~1000.0μg∕m³ |
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52/1177 | Temperature an hourly average measurements x100 | 4 | R | 1 | INT16 | 2 | -2000~6000 corresponding to -20.00℃~60.00℃ |
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53/1178 | Humidity an hourly average measurements x100 | 4 | R | 1 | UINT16 | 2 | 0~10000 corresponding to 0~100.00% RH |
|
54/1179 | CO2 an hourly average measurements x1 | 4 | R | 1 | UINT16 | 0 | 0~5000 corresponding to 0～5,000ppm |
|
55/1180 | TVOC an hourly average measurements x1000 | 4 | R | 1 | UINT16 | 3 | 0~3575 corresponding to ~ 3.575mg∕m³ |
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56/1150 | PM2.5 one minute average measurements x10 | 4 | R | 1 | UINT16 | 1 | 0~10000 corresponding to 0~1000.0μg∕m³ |
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57/1151 | PM10 one minute average measurements x10 | 4 | R | 1 | UINT16 | 1 | 0~10000 corresponding to 0~1000.0μg∕m³ |
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58/1152 | Temperature real-time measurements x100 | 4 | R | 1 | INT16 | 2 | -2000~6000 corresponding to -20.00℃~60.00℃ |
|
59/1153 | Humidity real-time measurements x100 | 4 | R | 1 | UINT16 | 2 | 0~10000 corresponding to 0~100.00% RH |
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60/1154 | CO2 real-time measurements x1 | 4 | R | 1 | UINT16 | 0 | 0~5000 corresponding to 0~5,000ppm |
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61/1155 | TVOC real-time measurements x1000 | 4 | R | 1 | UINT16 | 3 | 0~3575 corresponding to ~ 3.575mg∕m³ |
|
62/1200 | PM2.5 24-hour moving average measurements x10 | 4 | R | 1 | UINT16 | 1 | 0~10000 corresponding to 0~1000.0μg∕m³ |
|
63/1201 | PM10 24-hour moving average measurements x10 | 4 | R | 1 | UINT16 | 1 | 0~10000 corresponding to 0~1000.0μg∕m³ |
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64/1202 | Temperature 24-hour moving average measurements x100 | 4 | R | 1 | INT16 | 2 | -2000~6000 corresponding to -20.00℃~60.00℃ |
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65/1203 | Humidity 24-hour moving average measurements x100 | 4 | R | 1 | UINT16 | 2 | 0~10000 corresponding to 0~100.00% RH |
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66/1204 | CO2 24-hour moving average measurements x1 | 4 | R | 1 | UINT16 | 0 | 0~5000 corresponding to 0～5,000ppm |
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67/1205 | TVOC 24-hour moving average measurements x1000 | 4 | R | 1 | UINT16 | 3 | 0~3575 corresponding to 0~ 3.575mg∕m³ |
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