RLE 10K V.2.5.a - Manual (Page 34)

34 SeaHawk 10K User Guide 800.518.1519
4 Modbus Communication
4.3. RTU Framing
The example below shows a typical Query/Response from an SeaHawk 10K module.
Slave address 2 responds to Function Code 4 with six bytes of hexadecimal data and ends with
CRC16 checksum.
Register Values:
40001 = 0000 (hex)
40002 = 0000 (hex)
40003 = 0001 (hex)
30009 Version Firmware version x.x.x
(If the register reads
301, the firmware
version is 3.0.1)
0-65535
38001 Leak Distance Leak distance in meters -
float point - displays with a
tenths place decimal value.
This register must be viewed
and displayed as float
inverse.
Meters 0.0-9999.9
38003 Cable Length Cable length in meters - float
point - displays with a tenths
place decimal value. This
register must be viewed and
displayed as float inverse.
Meters 0.0-9999.9
Register Name Description Units Range
Table 4.5 Input Registers (continued)
Bit Description
00 1 = Leak detected
01 1 = Cable break detected
02 1 = Contamination detected
03 1 = Summary alarm
04-15 Spare
Table 4.6 Status Flags (Register 30001)
Slave
Address
Function
Code
Count Bytes
of Data
Register
Data
Msb Lsb
Register
Data
Msb Lsb
Register
Data
Msb Lsb
CRC
16
“Lsb”
CRC
126
“Msb”
02 04 06 00 00 00 00 00 01 B5 A3
Table 4.7 Response Sample