Rtu framing, Table 5.9, Response sample – RLE LD1500 V.3.1 User Manual
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42
LD1500 User Guide
800.518.1519
5
Modbus Communication
5.3. RTU
Framing
The example below shows a typical Query/Response from a LD1500 module.
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)
Table 5.9 Response Sample
Slave
Address
Function
Code
Count
Bytes of
Data
Register
Data
MSB LSB
Register
Data
MSB LSB
Register
Data
MSB LSB
CRC16
LSB
CRC16
MSB
02
04
06
00
00
00
00
00
01
B5
A3
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