Mitsubishi Electric FR-D720-008 Instruction Manual page 209

Description of normal response
1) to 4) (including CRC check) of the normal response are the same as those of the query message.
Example: To write 0.5s (H05) to 41007 (Pr. 7) at the slave address 25 (H19) and 1s (H0A) to 41008 (Pr.8).
Query message
Slave
Function
Address Address
H19 H10 H03
(8bit) (8bit) (8bit)
Normal response (Response message)
Slave
Function
Address Address
H19 H10 H03
(8bit) (8bit) (8bit)
Read holding register access log (H46 or 70)
A response can be made to a query made by the function code H03 or H10.
The starting address of the holding registers that succeeded in access during previous communication and the
number of successful registers are returned.
In response to the query for other than the above function code, 0 is returned for the address and number of
registers.
Query message
1) Slave Address 2) Function
H46
(8bit)
(8bit)
Normal response (Response message)
1) Slave Address 2) Function
H46
(8bit)
(8bit)
Query message setting
Message
1) Slave Address
2) Function
Description of normal response
Message
3) Starting Address
4) No. of Points
Example: To read the successful register starting address and successful count from the slave address 25 (H19).
Query message
Slave Address Function
H19 H46
(8bit) (8bit)
Normal response (Response message)
Slave Address Function
H19 H10
(8bit) (8bit)
Success of two registers at starting address 41007 (Pr. 7) is returned.
Communication operation and setting
Starting
No. of Points
HEE H00 H02
(8bit) (8bit) (8bit)
Starting
No. of Points
HEE H00 H02
(8bit) (8bit) (8bit)
CRC Check
L H
(8bit) (8bit)
3) Starting Address
H L
(8bit) (8bit)
Address to which the message will be sent
Broadcast communication cannot be made (0 is invalid).
Set H46.
The starting address of the holding registers that succeeded in access is returned.
Starting address = Starting register address (decimal)-40001
For example, when the starting address 0001 is returned, the address of the
holding register that succeeded in access is 40002.
The number of holding registers that succeeded in access is returned.
CRC Check
H8B HD2
(8bit) (8bit)
Starting Address
H03 HEE
(8bit) (8bit)
Byte
Data
Count
H04 H00 H05 H00
(8bit) (8bit) (8bit) (8bit)
CRC Check
H22 H61
(8bit) (8bit)
4) No. of Points CRC Check
H L L
(8bit) (8bit) (8bit)
Setting Description
Setting Description
No. of Points CRC Check
H00 H02 H22
(8bit) (8bit) (8bit)
CRC Check
H0A H86 H3D
(8bit) (8bit) (8bit)
H
(8bit)
H61
(8bit)
205
4