Mitsubishi Electric FR-A720-0.4K Instruction Manual page 362

Write multiple holding register data (H06 or 06)
You can write the description of 1) system environment variables and 4) inverter parameters assigned to the
holding register area (refer to the register list (page 355)).
Query message
1) Slave Address 2) Function
H06
(8 bits)
(8 bits)
Normal response (Response message)
1) Slave Address 2) Function
H06
(8 bits)
(8 bits)
⋅ Query message setting
Message
1) Slave Address
2) Function
3) RegisterAddress
4) Preset Data
⋅ Description of normal response
1) to 4) (including CRC check) of the normal response are the same as those of the query message.
No response is made for broadcast communication.
Example) To write 60Hz (H1770) to 40014 (running frequency RAM) at slave address 5 (H05).
Query message
Slave Address Function
H05 H06
(8 bits) (8 bits)
Normal Response (Response message)
Same data as the query message
CAUTION
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.
Communication operation and setting
3) Register Address 4) Preset Data
H (8 bits) L (8 bits) H (8 bits) L (8 bits)
3) Register Address 4) Preset Data
H (8 bits) L (8 bits) H (8 bits) L (8 bits)
Set the address to which the message will be sent. Setting of address 0
enables broadcast communication
Set H06.
Set the address of the holding register to which data will be written.
Register address = holding register address (decimal) − 40001
For example, setting of register address 0001 writes data to the holding
register address 40002.
Set the data that will be written to the holding register. The written data is
fixed to 2 bytes.
Register Address
H00 H0D
(8 bits) (8 bits)
CRC Check
L (8 bits) H (8 bits)
CRC Check
L (8 bits) H (8 bits)
Setting Description
Preset Data
H17 H70
(8 bits) (8 bits) (8 bits)
CRC Check
H17 H99
(8 bits)
4
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