Delta VP3000 Series - Page 259

Chapter 6 Drive Communication Network｜VP3000
250
1. Communication Data Frame
ASCII mode:
STX
Start character = ‘ : ’ (3AH)
Address High
Communication address:
one 8-bit address consists of 2 ASCII codes
Address Low
Function High
Command code:
one 8-bit command consists of 2 ASCII codes
Function Low
DATA (n-1)
Contents of data:
n x 8-bit data consists of 2n ASCII codes
n ≤ 16, maximum of 32 ASCII codes (20 sets of data)
…….
DATA 0
LRC Check High
LRC checksum:
one 8-bit checksum consists of 2 ASCII codes
LRC Check Low
END High
End characters:
END High = CR (0DH), END Low = LF (0AH)
END Low
RTU mode:
START
A silent interval of more than 10 ms
Address
Communication address: 8-bit binary address
Function
Command code: 8-bit binary command
DATA (n-1)
Contents of data:
n×8-bit data, n ≤ 16
…….
DATA 0
CRC Check Low
CRC checksum:
one 16-bit CRC checksum consists of 2 8-bit binary characters
CRC Check High
END
A silent interval of more than 10 ms
2. Communication Address (Address)
00H: Broadcast to all AC motor drives
01H: AC motor drive at address 01
0FH: AC motor drive at address 15
10H: AC motor drive at address 16, and so on, up to address 254 (FEH)
Function code (Function)
Command code:
Functions
03H
Read data from register
06H
Write single register
10H
Write continuous multiple data (can write at most 20 sets of data
simultaneously).