SMS-531 User’s Manual v1.1
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Byte 6 ~ 7
CRC-16 check code
Error
Response
Byte 0
The Modbus Address of the SMS-531
Byte 1
= 0x90
Byte 2
Error Code
02: The SMS-531 is sending the SMS. The content of
the SMS is unchangeable.
Byte 3 ~ 4
CRC-16 check code
Sending the SMS (Function Code 5)
Command
Byte 0
The Modbus Address of the SMS-531
Byte 1
Function Code = 0x05
Byte 2 ~ 3
= 0x0080
Byte 4 ~ 5
= 0xFF00
Byte 6 ~ 7
CRC-16 check code
Correct
Response
Byte 0
The Modbus Address of the SMS-531
Byte 1
Function Code = 0x05
Byte 2 ~ 3
= 0x0080
Byte 4 ~ 5
= 0xFF00
Byte 6 ~ 7
CRC-16 check code
Error
Response
Byte 0
The Modbus Address of the SMS-531
Byte 1
= 0x85
Byte 2
Error Code:
06: Sending buffer overflow or the SMS is sending
Byte 3 ~ 4
CRC-16 check code
