Error Response
Offset
Description
00
Slave ID address
01
Function Code
02
Data
03 ~ 04
CRC
SI-W509 SERIES USER MANUAL
Chapter 4 MODBUS RTU Protocol
Counts
1 Byte
1 to 255
1 Byte
0x82
1 Byte
0xCD: No function
2 Bytes
Produced by firmware.
Data
Page: 4-8