Delta Electronics ASDA-B2 series User Manual page 277

Chapter 8 MODBUS Communications
RTU Mode:
Command message:
Slave address
Function
Starting data
address
Number of data
(In Word)
CRC Check Low
CRC Check High
Please note that a silent interval of more than 10ms is required before and after data
transmission in RTU mode.
Example 2
Function code: 06H, write 1 word
For example, writing 100 (0064H) to starting data address 0200H of ASDA-B2 series with
address 01H.
ASCII Mode:
Command message:
Start
Slave address
Function
Starting data
address
Content of data
LRC Check
End 1
End 0
8-10
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VARITEL INGENIERIA ELECTRONICA S.A.
01H
03H
02H (Upper bytes)
00H (Lower bytes)
00H
02H
C5H (Lower bytes)
B3H (Upper bytes)
':'
'0'
'1'
'0'
'6'
'0'
'2'
'0'
'0'
'0'
'0'
'6'
'4'
'9'
'3'
(0DH)(CR)
(0AH)(LF)
Response message:
Slave address
Function
Number of data
(In Byte)
Contents of
starting data
address 0200H
Contents of
second data
address 0201H
CRC Check Low
CRC Check High
Response message
:
Start
Slave address
Function
Starting data
address
Content of data
LRC Check
End 1
End 0
ASDA-B2
01H
03H
04H
00H (Upper bytes)
B1H (Lower bytes)
1FH (Upper bytes)
40H (Lower bytes)
A3H (Lower bytes)
D4H (Upper bytes)
':'
'0'
'1'
'0'
'6'
'0'
'2'
'0'
'0'
'0'
'0'
'6'
'4'
'9'
'3'
(0DH)(CR)
(0AH)(LF)
Revision September 2013