Mitsubishi Electric FR-A820-00046 Instruction Manual page 816

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(N) Operation via communication and its settings
Preset Single Register (writing of data to holding registers) (H06 or 06)
● The content of the "system environmental variables" and "inverter parameters" assigned to the
holding register area (refer to the register list (page 5-641)) can be written.
● Query message
³ Slave Address
(8 bits)
● Normal response (Response message)
³ Slave Address
(8 bits)
● Query message setting
Message
³ Slave Address
· Function
» Register Address
¿ Preset Data
Tab. 5-285: Description of the query message
● Content of normal response
With a normal response, the content is the same as ³ to ¿ (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
H05
(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.
5 - 636
· Function
» Register Address
H06
H
(8 bits)
(8 bits)
· Function
» Register Address
H06
H
(8 bits)
(8 bits)
Description
Set the address to send messages to. Setting "0" enables broadcast communication.
Set H06.
Set the address from data is written to the holding register.
Register address = holding register address (decimal) - 40001
For example, when register address 0001 is set, data is written to holding register
address 40002.
Set the data to write to the holding register. Write data is fixed at 2 bytes.
Function
Register Address
H06
H00
(8 bits)
(8 bits)
(8 bits)
¿ Preset Data
L
H
(8 bits)
(8 bits)
¿ Preset Data
L
H
(8 bits)
(8 bits)
Preset Data
H0D
H17
H70
(8 bits)
(8 bits)
Parameters
CRC Check
L
L
H
(8 bits)
(8 bits)
(8 bits)
CRC Check
L
L
H
(8 bits)
(8 bits)
(8 bits)
CRC Check
H17
H99
(8 bits)
(8 bits)

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