Mitsubishi Electric FR-D720-008 Instruction Manual page 207

Write holding register data (H06 or 06)
Can write the description of 1) system environment variabls and 4) inverter parameters assigned to the holding
register area (refer to the register list ( page 207)).
Query message
1) Slave Address 2) Function
H06
(8bit)
(8bit)
Normal response (Response message)
1) Slave Address 2) Function
H06
(8bit)
(8bit)
Query message setting
Message
1) Slave Address
2) Function
3) Register Address
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
(8bit) (8bit)
Normal response (Response message)
Same data as the query message
NOTE
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 L H
(8bit) (8bit) (8bit)
3) Register Address 4) Preset Data
H L H
(8bit) (8bit) (8bit)
Address to which the message will be sent
Setting of address 0 enables broadcast communication
Set H06.
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.
Data that will be written to the holding register
The written data is always 2 bytes.
Register Address
H00 H0D
(8bit) (8bit)
CRC Check
L L H
(8bit) (8bit) (8bit)
CRC Check
L L H
(8bit) (8bit) (8bit)
Setting Description
Preset Data CRC Check
H17 H70 H17
(8bit) (8bit) (8bit)
H99
(8bit)
4
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