Diagnostics (Diagnosis Of Functions) (H08 Or 08) - Mitsubishi Electric 800 Series Instruction Manual

• Content of normal response
With a normal response, the content is the same as a to d (including the CRC check) query messages.
In the case of broadcast communication, no response is returned.
Example) Write 60 Hz (H1770) to 40014 (running frequency) of slave address 5 (H05).
Query message
Slave Address Function
H05 H06
(8 bits) (8 bits)
Normal response (Response message)
Same data as 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.
4.5.8

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
H08
(8 bits)
(8 bits)
• Normal response (Response message)
a. Slave Address b. Function
H08
(8 bits)
(8 bits)
Register Address
H00 H0D
(8 bits) (8 bits)
c. Subfunction
H00 H00
(8 bits) (8 bits)
c. Subfunction
H00 H00
(8 bits) (8 bits)
Preset Data
H17 H70
(8 bits) (8 bits)
d. Data
H L L
(8 bits) (8 bits) (8 bits)
d. Data
H L L
(8 bits) (8 bits) (8 bits)
CRC Check
H17 H99
(8 bits) (8 bits)
CRC Check
H
(8 bits)
CRC Check
H
(8 bits)
PARAMETER
4
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