Delta Electronics Elevator Drive VFD-VL User Manual page 144

RTU mode:
CRC CHK High
3.2 Address (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 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
08H: loop detection
10H: write multiple registers
The available function codes and examples for VFD-VL are described as follows:
(1) 03H: multi read, read data from registers.
Example: reading continuous 2 data from register address 2102H, AMD address is 01H.
ASCII mode:
Command message:
Revision Nov. 2008, VLE1, SW V1.03
START A silent interval of more than 10 ms
Address Communication address: 8-bit address
Function
Command code: 8-bit command
DATA (n-1)
Contents of data:
to
n×8-bit data, n<=16
DATA 0
CRC CHK Low
CRC check sum:
16-bit check sum consists of 2 8-bit characters
END A silent interval of more than 10 ms
STX
Address
Function
Starting data
address
Number of data
(count by word)
Response message:
':'
'0'
'1'
'0'
'3'
'2'
'1'
'0'
Content of starting
'2'
'0'
'0'
Chapter 4 Parameters|
STX
Address
Function
Number of data
(Count by byte)
address
2102H
':'
'0'
'1'
'0'
'3'
'0'
'4'
'1'
'7'
'7'
'0'
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