Range: 0-20mg/L
Resolution: 0.01mg/L
Output signal: RS485
Communication protocol: MODBUS-RTU
Specification
| Measurement | DO value in water |
| Measure range | 0~40.00mg/l |
| Resolution | 0.01mg/l |
| Temperature range | -20~60°C |
| Type of sensor | Galvanic Cell sensor |
| Measuring accuracy | <0.5mg/l |
| Output mode | RS485 port*1 |
| Communication protocol | Compatible with standard MODBUS-RTU protocol |
| Communication mode | RS485 9600,8,1,N (by default) |
| ID | 1~255 Default ID 01 (0x01) |
| Fixing method | RS485 remote setting calibration and parameters |
| Power supply mode | 12VDC |
| Power consumption | 30 mA @12VDC |
Introduction
Intelligent module communication protocol Introduction
Communication port: RS485
Port setting: 9600,N,8,1 (by default)
Device address: 0x01 (by default)
Protocol specifications: Modbus RTU
Commands support: 0x03 read register
0X06 write register| 0x10 continuous write register
| 0x03 read data [HEX] | ||||
| 01 | 03 | ×× ×× | ×× ×× | ×× ×× |
| Address | Function code | Data head address | Data length | Check code |
| 0x06 write data [HEX] | ||||
| 01 | 06 | ×× ×× | ×× ×× | ×× ×× |
| Address | Function code | Data address | Write data | Check code |
Remarks: The check code is 16CRC with low byte ahead.
| 0x10 Continuous write data [HEX] | |||
| 01 | 10 | ×× ×× | ×××× |
| Address | Function code | Data address | Register number |
| ×× | ×× ×× | ×× ×× | |
| Byte number | Write data | Check code | |
| Address | Data name | Switch coefficient | Status |
| 0 | Temperature | 0.1°C | R |
| 1 | DO | 0.01mg/L | R |
| 2 | Saturability | 0.1%DO | R |
| 3 | Sensor. null point | 0.1% | R |
| 4 | Sensor. slope | 0.1mV | R |
| 5 | Sensor. MV | 0.1%S | R |
| 6 | System status. 01 | Format 4*4bit 0xFFFF | R |
| 7 | System status.02 User command address | Format: 4*4bit 0xFFFF | R/W |
Remarks:Data in each address is a 16-bit signed integer, the length is 2 bytes.
The real result=Register data * switch coefficient
Status:R=only read; R/W= read/write
