ICP DAS USA SMS-531, Руководство пользователя, Страница: 54 / 64

SMS-531 User’s Manual v1.1
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5. Send a clear SMS command to clear the SMS from the GT-531 and it
can receive the next SMS.
Result
The phone of transmitting SMS
：
886928766507
Date
：
20110422095531(2011/04/22/ 09:55:31)
The SMS
：
Hello,GT-531!
Format Description:
Inquiring the SMS-531 whether has received the SMS
Command
Byte 0 The Modbus Address of the SMS-531
Byte 1 Function Code = 2
Byte 2 ~ 3
The address to indicate whether the SMS-531 has
received the SMS
Byte 4 ~ 5
Bit Count
，
1 bit
Byte 6 ~ 7 CRC-16 check code
Correct
response
Byte 0 The Modbus Address of the SMS-531
Byte 1 Function Code = 2
Byte 2
Byte Count
，
(The size of Data)
Byte 3
= 0, No SMS
= 1, Having received the SMS
Byte 4 ~ 5 CRC-16 check code
Error response
Byte 0 The Modbus Address of the SMS-531
Byte 1 = 0x82
Byte 2
Error Code
02: Error format
Byte 3 ~ 4 CRC-16 check code
Reading the phone number of the received SMS
Command
Byte 0 The Modbus Address of the SMS-531
Byte 1 Function Code = 4
Byte 2 ~ 3 The data address of the sending phone number
Byte 4 ~ 5
Register Count (The inquired count of register. It is
fixed as 10(0x0A)
Byte 6 ~ 7 CRC-16 check code
Correct
Response
Byte 0 The Modbus Address of the SMS-531
Byte 1 Function Code = 4
Byte 2 Byte Count
Byte 3 ~ 22
The sending phone number (ASCII coed, 0x00 is the
end char)
Byte 23 ~ 24 CRC-16 check code