Delta VFD-ED Series, User Manual

Page: 287 / 389

Ch12 Descriptions of Parameter Settings | VFD-ED
12-76
RTU mode:
START A silent interval of larger than/equal to 10 ms
Address Communication address: 8-bit binary address
Function
Command code: 8-bit binary command
DATA (n-1)
to
DATA 0
Contents of data:
n×8-bit data, n<=16
CRC CHK Low CRC checksum:
16-bit CRC checksum consists of 2 8-bit binary characters
CRC CHK High
END A silent interval of larger than/equal to 10 ms
3.2 Address (Communication Address)
00H: Broadcast to all AC motor drives
01H: AC motor drive of address 01
0FH: AC motor drive of address 15
10H: AC motor drive of address 16
:
FEH: AC motor drive of address 254
3.3 Function (Function code) and DATA (data characters)
(1) 03H: Read data from register
Example: reading continuous 2-data from register address 2102H, AMD address is 01H.
ASCII mode:
Command Message Response Message
STX ‘:’ STX ‘:’
Address
‘0’
Address
‘0’
‘1’ ‘1’
Function
‘0’
Function
‘0’
‘3’ ‘3’
Starting address
‘2’ Number of data
(count by byte)
‘0’
‘1’
‘4’
‘0’
Content of starting
address 2102H
‘1’
‘2’ ‘7’
Number of data
(count by word)
‘0’ ‘7’
‘0’ ‘0’
‘0’
Content of address 2103H
‘0’
‘2’ ‘0’
LRC Check
‘D’ ‘0’
‘7’ ‘0’
END
CR LRC Check ‘7’
LF ‘1’
END
CR
LF
RTU mode:
Command Message Response Message
Address 01H Address 01H
Function 03H Function 03H
Starting data address
21H Number of data
(count by byte)
04H
02H
Number of data
(count by world)
00H Content of data
address 2102H 17H
02H 70H
CRC CHK Low 6FH Content of data
address 2103H 00H
CRC CHK High F7H 00H
CRC CHK Low FEH
CRC CHK High 5CH