Mitsubishi Electric FR-A700 Instruction Manual page 654

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 bit)
Normal response (Response message)
Slave
Address
(8 bit)
Message
Slave Address
Function
Subfunction
Data
Tab. 6-152: Description of the query message
The normal response data
as those of the query message.
NOTE For broadcast communication, no response is returned in reply to a query. Therefore, the
next query must be made when the inverter processing time has elapsed after the previous
query.
6 - 474
Function Subfunction
H08 H00 H00
(8 bit) (8 bit) (8 bit)
Function Subfunction
H08 H00 H00
(8 bit) (8 bit) (8 bit)
Description
Set the address to which the message will be sent. Broadcast communica-
tion 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
Data
H L
(8 bit) (8 bit)
Data
H L
(8 bit) (8 bit)
Parameter
CRC Check
L H
(8 bit) (8 bit)
CRC Check
L H
(8 bit) (8 bit)