Delta Electronics AFE075A23A, Руководство пользователя

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Chapter 11 Description of Parameter Settings
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AFE2000 Series
11-88
…….
DATA 0
Nx8-bit data consist of 2n ASCII codes
n<=16, maximum of 32 ASCII codes
LRC CHK Hi
LRC CHK Lo
LRC check sum:
8-bit check sum consists of 2 ASCII codes
END Hi
END Lo
End characters:
END1= CR (0DH), END0= LF(0AH)
RTU mode:
START A silent interval of more than 10 ms
Address Communication address: 8-bit address
Function Command code: 8-bit command
DATA (n-1)
…….
DATA 0
Contents of data:
n×8-bit data, n<=16
CRC CHK Low
CRC CHK High
CRC check sum:
16-bit check sum consists of 2 8-bit characters
END A silent interval of more than 10 ms
Address (Communication Address)
Valid communication addresses are in the range of 0 to 254. A communication address equal to 0,
means broadcast to all AFE unit. In this case, the AFE unit AFE UNIT will not reply any message to
the master device.
00H: broadcast to all AFE units
01H: AFE unit of address 01
0FH: AFE unit of address 15
10H: AFE unit of address 16
:
FEH: AFE unit of address 254
Function (Function code) and DATA (data characters)
The format of data characters depends on the function code.
03H: read data from register
06H: write single register
Example: reading continuous 2 data from register address 2102H, AFE unit address is 01H.
ASCII mode:
Command Message: Response Message
STX ‘:’ STX ‘:’
‘0’ ‘0’
Address
‘1’
Address
‘1’
‘0’ ‘0’
Function
‘3’
Function
‘3’
‘2’ ‘0’
‘1’ Number of data
(count by byte)
‘4’
‘0’ ‘1’
Starting address
‘2’
Content of starting
address 2102H
‘7’