Protech Systems SI-W309 User Manual page 41

Response-2
The channel address is 0x1000~0x1005, 0x1040~0x1045, 0x1180~0x1185, 0x11C0
and 0x11C1.
Offset Description
00 Slave ID address
01 Function Code
02 Byte Count
03 ~ 04 Data
05 ~ 06 CRC
Error Response
Offset Description
00 Slave ID address
01 Function Code
02
03 ~ 04
SI-W309 SERIES USER MANUAL
Counts
1 Byte
1 Byte
1 Byte
2 Bytes
2 Bytes
Counts
1 Byte
1 Byte
Data 1 Byte
CRC 2 Bytes
Chapter 4 MODBUS RTU Protocol
Data
1 to 255
0x05
2
Refer to Section 4.3 Address
Mapping.
Produced by firmware.
Data
1 to 255
0x85
0xCD: No Function
Produced by firmware.
Page: 4-10