Mitsubishi Electric FR-A700 Technical Manual page 432

Read Holding Register Access Log (H46 or 70)
A response can be made to a query made by
the function code H03, 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
(8bit)
Normal response (Response message)
1) Slave Address 2) Function
(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
(8bit)
Normal response (Response message)
Slave Address Function
H19
(8bit)
Success of two registers at starting address 41007 [Pr. 7] is returned.
CRC Check
H46 L
(8bit) (8bit)
3) Starting Address
H46 H
(8bit) (8bit) (8bit)
Set the address to which a 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
H46 H8B HD2
(8bit) (8bit) (8bit)
Starting Address
H10 H03 HEE
(8bit) (8bit) (8bit)
H
(8bit)
4) No. of Points
L H L
(8bit) (8bit)
Setting Description
Setting Description
No. of Points CRC Check
H00 H02 H22
(8bit) (8bit) (8bit)
466
PARAMETER
CRC Check
L H
(8bit) (8bit)
H61
(8bit)