Delta Electronics AFE075A43A User Manual page 90

Chapter 11 Description of Parameter SettingsAFE2000 Series
.......
DATA 0
LRC CHK Hi
LRC CHK Lo
END Hi
END Lo
RTU mode:
START
Address
Function
DATA (n-1)
.......
DATA 0
CRC CHK Low
CRC CHK High
END
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:
STX
Address
Function
Starting address
Nx8-bit data consist of 2n ASCII codes
n<=16, maximum of 32 ASCII codes
LRC check sum:
8-bit check sum consists of 2 ASCII codes
End characters:
END1= CR (0DH), END0= LF(0AH)
A silent interval of more than 10 ms
Communication address: 8-bit address
Command code: 8-bit command
Contents of data:
n×8-bit data, n<=16
CRC check sum:
16-bit check sum consists of 2 8-bit characters
A silent interval of more than 10 ms
':'
'0'
'1'
'0'
'3'
'2' Number of data
'1' (count by byte)
'0' Content of starting
address 2102H
'2'
11-88
Response Message
STX
Address
Function
':'
'0'
'1'
'0'
'3'
'0'
'4'
'1'
'7'