Mitsubishi Electric 800 Series Instruction Manual page 508

 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
a. Slave Address b. Function
(8 bits) H08
(8 bits)
• Normal response (Response message)
a. Slave Address b. Function
(8 bits) H08
(8 bits)
• Query message setting
Message
a Slave Address
b Function
c Subfunction
d Data
• Content of normal response
With a normal response, the content is the same as a to d (including the CRC check) query messages.
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.
c. Subfunction
H00 H00 H
(8 bits) (8 bits) (8 bits)
c. Subfunction
H00 H00 H
(8 bits) (8 bits) (8 bits)
Set the address to send messages to. Broadcast communication is not possible.
(Invalid when "0" is set.)
Set H08.
Set H0000.
Any data 2 bytes long can be set. Setting range is H0000 to HFFFF.
d. Data CRC Check
L L H
(8 bits) (8 bits) (8 bits)
d. Data CRC Check
L L H
(8 bits) (8 bits) (8 bits)
Description
5.12 (N) Operation via communication and its settings
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5. PARAMETERS