Communication operation and setting
● Function diagnosis (H08 or 08)
A communication check can be made since the query message sent is returned unchanged as a
response message (function of subfunction code H00). Subfunction code H00 (Return Query
Data).
Query message
Slave
Address
(8 bits)
Normal response (Response message)
Slave
Address
(8 bits)
Message
Slave Address
Function
Subfunction
Data
Tab. 6-93: Description of the query message
The normal response data
of the query message.
6 - 272
Function
Subfunction
H08
H00
H00
(8 bits)
(8 bits)
(8 bits)
Function
Subfunction
H08
H00
H00
(8 bits)
(8 bits)
(8 bits)
Description
Set the address to which the message will be sent. Broadcast communication
cannot be made (0 is invalid)
Set H08.
Set H0000.
Any data can be set if it is 2 bytes long.
The setting range is H0000 to HFFFF.
to
(including CRC check) of the normal response are the same as those
Data
H
L
(8 bits)
(8 bits)
(8 bits)
Data
H
L
(8 bits)
(8 bits)
(8 bits)
Parameter
CRC Check
L
H
(8 bits)
CRC Check
L
H
(8 bits)