Rtu Framing; Table 5.10 Query Sample; Table 5.11 Response Sample - RLE Technologies LD5200 User Manual

5 Modbus Communication
5.5

RTU Framing

The example below shows a typical Query/Response from the LD5200 module.
Slave Function
Address Code
02 04
Table 5.10 Query Sample
Slave Function
Address Code
02 04
Table 5.11 Response Sample
Slave address 2 responds to Function Code 4 with 6 bytes of hexadecimal data and ends with
CRC16 checksum
Register Values:
40001 = 0000 (hex)
40002 = 0000 (hex)
40003 = 0001 (hex)
102
Starting Starting
Register Register
"Msb" "Lsb"
00 00
Count Register
Bytes of Data
Data Msb Lsb
06 00 00
LD5200 User Guide
Numbers
of Number of
Registers Registers
"Lsb" "Lsb"
00 03
Register Register
Data Data
Msb Lsb Msb Lsb
00 00 00 01
CRC 16 CRC
"Lsb" "Msb"
B5 A3
CRC 16 CRC 16
"Lsb" "Msb"
B5 A3
800.518.1519