Communication Data Frame: Rtu Mode - Delta CP2000 Series User Manual

Communication Data Frame: RTU mode

START
Address
Function
DATA (n-1)
.......
DATA 0
CRC CHK Low
CRC CHK High
END
Address (Communication Address)

00H: broadcast to all AC drives
01H: AC drive of address 01
0FH: AC drive of address 15
10H: AC drive of address 16
:
FEH: AC drive 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
10H: write continuous multiple data
Example: reading continuous 2 data from register address 2102H, AMD address is 01H.
ASCII mode:
Command Message:
STX
Address
Function
Starting register
Number of register
(count by word)
LRC Check
END
Chapter 12 Description of Parameter SettingsCP2000
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 register
(count by byte)
'1'
'0'
'2'
Content of starting
register 2102H
'0'
'0'
'0'
'2' Content of register
'D'
'7'
CR
LRC Check
LF
12.1-09-4
Response Message
STX
Address
Function
2103H
END
':'
'0'
'1'
'0'
'3'
'0'
'4'
'1'
'7'
'7'
'0'
'0'
'0'
'0'
'0'
'7'
'1'
CR