Mitsubishi Electric FR-D720-0.2K-G Instruction Manual page 211

Communication operation and setting
 Write holding register data (H06 or 06)
Can write the description of 1) system environment variables and 4) drive unit parameters assigned to the holding
register area (refer to the register list on page 212).
Query message
1) Slave Address
(8 bits)
Normal response (Response message)
1) Slave Address
(8 bits)
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
H05
(8 bits)
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 drive unit processing time has elapsed after the previous query.
208
2) Function 3) Register Address
H06 H
(8 bits) (8 bits)
2) Function 3) Register Address
H06 H
(8 bits) (8 bits)
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.
Function Register Address
H06 H00
(8 bits) (8 bits)
4) Preset Data
L H L
(8 bits) (8 bits) (8 bits)
4) Preset Data
L H L
(8 bits) (8 bits) (8 bits)
Setting Description
H0D H17
(8 bits) (8 bits)
CRC Check
L H
(8 bits) (8 bits)
CRC Check
L H
(8 bits) (8 bits)
Preset Data CRC Check
H70 H17
(8 bits) (8 bits)
H99
(8 bits)