Azbil SDC36 - Page 234

8-10
Chapter 8. Modbus COMMUNICATION FUNCTION
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Response Message
A response message corresponding to the command content is returned when the
message is correctly received.
The figure below shows the structure of the response message when the data is
written.
Modbus ASCII
(2)(1) (3) (4) (5) (6)
(7)
3AH
:
30H
0
31H
1
31H
1
30H
0
30H
0
35H
5
44H
D
44H
D
30H
0
30H
0
30H
0
32H
2
30H
0
42H
B
0DH
CR
0AH
LF
(1) Start of message
(2) Station address
(3) Write command 10H
(4) Start data address
(5) Number of write data
(6) Checksum
(7) Delimiter
Modbus RTU
(2)(1) (3) (4)
01H 10H 05H DDH 00H 02H D1H
(5)
3EH
(1) Station address
(2) Write command 10H
(3) Start data address
(4) Number of write data
(5) Checksum
Note
The response message at the time of abnormal termination is the same as that for
the read command.