Chapter 5 ParametersVFD-S Series
3.2 ADR (Communication Address)
Valid communication addresses are in the range of 0 to 254. A communication address equal to 0, means broadcast to all AC drives (AMD). In this case, the AMD will not reply any message to the master device.
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
For example, communication to AMD with address 16 decimal (10H): ASCII mode: Address=’1’,’0’ => ‘1’=31H, ‘0’=30H
RTU mode: Address=10H
3.3 CMD (Command code) and DATA (data characters)
The format of data characters depends on the command code. The available command codes are described as followed: Command code: 03H, read N words. The maximum value of N is 12. For example, reading continuous 2 words from starting address 2102H of
AMD with address 01H.
ASCII mode:
Command message:
STX | ‘:’ |
ADR 1 | ‘0’ |
ADR 0 | ‘1’ |
CMD 1 | ‘0’ |
CMD 0 | ‘3’ |
|
|
Starting data | ‘2’ |
‘1’ | |
address | ‘0’ |
| ‘2’ |
Number of data | ‘0’ |
‘0’ | |
(count by word) | ‘0’ |
| ‘2’ |
LRC CHK 1 | ‘D’ |
LRC CHK 0 | ‘7’ |
END 1 | CR |
END 0 | LF |
Response message:
STX | ‘:’ | |
ADR 1 | ‘0’ | |
ADR 0 | ‘1’ | |
CMD 1 | ‘0’ | |
CMD 0 | ‘3’ | |
|
| |
Number of data | ‘0’ | |
(Count by byte) | ‘4’ | |
Content of starting | ‘1’ | |
‘7’ | ||
address | ||
‘7’ | ||
2102H | ||
‘0’ | ||
| ||
Content of address | ‘0’ | |
‘0’ | ||
2103H | ‘0’ | |
| ‘0’ | |
LRC CHK 1 | ‘7’ | |
LRC CHK 0 | ‘1’ | |
END 1 | CR | |
END 0 | LF |
Revision August 2006, SE08, SW V2.61 |
