ICP DAS USA SMS-531 User Manual page 48

Sending the SMS (Function Code 15)
Byte 0
Byte 1
Byte 2 ~ 3
Command Byte 4 ~ 5
Byte 6
Byte 7
Byte 8 ~ 9
Byte 0
Byte 1
Byte 2 ~ 3
Correct
Byte 4 ~ 5
Response
Byte 6
Byte 7
Byte 8 ~ 9
Byte 0
Byte 1
Error
Response Byte 2
Byte 3 ~ 4
The Modbus Address of the SMS-531
Function Code = 0x0F
= 0x0080
= 0x0001
= 0x01
= 0x01
CRC-16 check code
The Modbus Address of the SMS-531
Function Code = 0x0F
= 0x0080
= 0x0001
= 0x01
= 0x01
CRC-16 check code
The Modbus Address of the SMS-531
= 0x8F
Error Code:
06: Sending buffer overflow or the SMS is sending
CRC-16 check code
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SMS-531 User's Manual v1.1