Delta ASDA-B2 Series User Manual page 279

Chapter 8 Communications
RTU Mode:
Command message (Master):
Slave address
Function
Starting data
address
Number of data
(In Word)
CRC Check Low
CRC Check
High
Note: Before and after the transmission in RTU mode, 10 ms of silent interval is needed.
Example 2: function code 06H, write single word:
The Master issues command to the 1
The Slave sends the response message to the Master after the writing is completed.
The calculation of LRC and CRC will be described in next chapter.
ASCII Mode:
Command message (Master):
Start
Slave address
Function
Starting data
address
Content of data
LRC Check
End 1
End 0
8-10
01H
03H
02H (High)
00H (Low)
00H
02H
C5H (Low)
B3H (High)
st
Slave and writes data 0064H to address 0200H.
':'
'0'
'1'
'0'
'6'
'0'
'2'
'0'
'0'
'0'
'0'
'6'
'4'
'9'
'3'
(0DH)(CR)
(0AH)(LF)
Response message (Slave):
Slave address
Function
Number of data
(In Byte)
Contents of
starting data
address 0200H
Contents of
second data
address 0201H
CRC Check Low A3H (Lower bytes)
CRC Check
High
Response message (Slave)
Start
Slave address
Function
Starting data
address
Content of data
LRC Check
End 1
End 0
ASDA-B2
01H
03H
04H
00H (High)
B1H (Low)
1FH (High)
40H (Low)
D4H (Upper bytes)
:
':'
'0'
'1'
'0'
'6'
'0'
'2'
'0'
'0'
'0'
'0'
'6'
'4'
'9'
'3'
(0DH)(CR)
(0AH)(LF)
Revision May, 2018