سنسور سطح راداری مدل BK-RD401

جدول مشخصات فنی

RS485 Modbus Protocol

RS485 output (Default Add.01):

Standard Modbus-RTU Protocol

Baud rate: 9600;

Checking bits: None;

Data bits: 8;

Stop bits: 1

7.1 Function Code:

Register Address 0000~0010

0000 Measuring air height Unit cm (Read)

0001 Measuring air height Unit mm (Read)

0002 Measuring liquid height Unit cm (Read)  The Liquid level is equal to the range value minus the empty height value.

0003 Measuring liquid height Unit mm (Read)  The Liquid level is equal to the range value minus the empty height value.

0004 Calibration distance value (modified value) (Read &Write) Unit mm

0005 Scan start value (i.e. blind area) (Read&Write) Unit mm  Measurement value < scan start value returns 0

0006 Scan length (i.e., range) (Read&Write) Unit mm  Measurement value > scan start value returns 0

0007 ID address (Read&Write)

0008 Baud rate (Read&Write)

00 0X（X means baud rate value，0-1200,1-2400,2-4800，3-9600，

 4-19200，5-38400， 6-57600，7-115200）； CRC_L CRC_H（CRC Checking number ）

0009 Filter times –average value (Read&Write)

Function code 03: The above registers can be read individually or collectively

Functio code 06: The above registers 0004~0010 can be modified separately

7.2 Read registers

Example: Read register from 0000 to read 10 register(Address1, hexadecimal)

Command: 01 03 0000 000A C5CD

Response: 01 03 14  XX————–XX（20byte）CRC_L CRC_H

If the returned values are different, the modification fails or the preset data exceeds the threshold

7.3  Read air height unit cm (179cm)

Command: 01  03  00  00  00  01  84  0A

Response: 01  03  02  00  B3  F9  F1  00 B3 air height unit cm

Sensor returned data is 00B3，00B3 which will convert to decimalism, the value is 179cm

7.4  Read air height unit mm (1790mm)

Command: 01  03  00  01  00  01  D5  CA

Response: 01  03  02  06  FE  3A  64

Sensor returned data is 06FE，06FE which will convert to decimalism, the value is 1790mm

7.5 Modify measuring range to 6000mm

Command: 01  06  00  06  17  70  67  DF

Response: 01  06  00  06  17  70  67  DF

17 70 is hexadecimal,need decimalism value convert to hexadecimal value

7.6 Modify device address ( write address 10)

Command:  01  06  00  07  00  10  39  C7

Response:  01  06  00  07  00  10  39  C7

00 10 means modified address 10