Mitsubishi Electric FR-A800, Instruction Manual

Page: 817 / 1042

Parameters (N) Operation via communication and its settings
FR-A800 5 - 637
Diagnostics (diagnosis of functions) (H08 or 08)
●
A communication check can be made since the query message is sent and the query message is
returned as it is as the return message (subfunction code H00 function).
Subfunction code H00 (Return Query Data)
●
Query message
●
Normal response (Response message)
●
Query message setting
●
Content of normal response
With a normal response, the content is the same as
to (including the CRC check) query
messages.
Slave Address Function Subfunction Data CRC Check
(8 bits)
H08
(8 bits)
H00
(8 bits)
H00
(8 bits)
H
(8 bits)
L
(8 bits)
L
(8 bits)
H
(8 bits)
Slave Address Function Subfunction Data CRC Check
(8 bits)
H08
(8 bits)
H00
(8 bits)
H00
(8 bits)
H
(8 bits)
L
(8 bits)
L
(8 bits)
H
(8 bits)
Message Description
Slave Address
Set the address to send messages to. Broadcast communication is not possible.
(Invalid when "0" is set.)
Function Set H08.
Subfunction Set H0000.
Data Any data 2 bytes long can be set. Setting range is H0000 to HFFFF.
Tab. 5-286: Description of the query message
NOTE With broadcast communication, no response is generated even if a query is executed, so when the
next query is made, it must be made after waiting for the inverter data processing time after the
previous query is executed.