Shihlin SE2 Series, Руководство пользователя

Страница: 68 / 155

68
4. Parameter description
Parameter
CRC added to the message, the low byte first join, and then the high byte.
●
Communication format
(1). Read data
(
H03
)
Mode Start
Address
*
1
）
Function
*
2
）
Initial address
*3
）
Register number
*
4
）
Check
End
ASCII H3A 2char 2char 4char 4char 2char 0D 0A
RTU >=10ms 8bit 8bit 2byte 2byte 2byte >=10ms
Normal response
Mode Start
Address
*
1
）
Function
*
2
）
Read data
number
*
5
）
Read data
*
6
）
Check
End
ASCII H3A 2char 2char 2char 4char …2N×8bit 2char 0D 0A
RTU >=10ms 8bit 8bit 1byte 2byte …N×8bit 2byte >=10ms
Message Content
*
1) Address Set the address to send information, 0 is in vain.
*
2) Function code H03
*
3) Initial address Set to the address of register to read.
*4
) Register number
Set to the number of register to read. The number is most 20 can read.
*
5) Read data number Twice to
*
4).
*6) Read data
Set information * 4) specified, read the data byte at the level of the order.
(2). Write data
(
H06
)
Mode Start
Address
*1
）
Function
*
2
）
Initial address
*
3
）
Write data
*
4
）
Check
End
ASCII H3A 2char 2char 4char 4char 2char 0D 0A
RTU >=10ms 8bit 8bit 2byte 2byte 2byte >=10ms
Normal response
Mode Start
Address
*
1
）
Function
*
2
）
Initial address
*
3
）
Write data
*
4
）
Check
End
ASCII H3A 2char 2char 4char 4char 2char 0D 0A
RTU >=10ms 8bit 8bit 2byte 2byte 2byte >=10ms