Mitsubishi Electric FR-F820-00046 Instruction Manual page 504

• Query message
a. Slave address b. Function
H08
(8 bits)
(8 bits)
• Normal response (Response message)
a. Slave address b. Function
H08
(8 bits)
(8 bits)
• Query message setting
Message
a Slave address
b Function
c Subfunction
d Data
• Content of normal response
The contents in the normal response (a to d, including the CRC check) are the same as those in the query messages.
NOTE
• With broadcast communication, no response is generated even if a query is executed, so when the next query is made, it must
be made after waiting for the inverter data processing time after the previous query is executed.
 Preset multiple registers (writing data to multiple holding registers) (H10
or 16)
• Data can be written to multiple holding registers.
• Query message
a. Slave
b. Function
address
H10 H
(8 bits)
(8 bits) (8 bits)
• Normal response (Response message)
a. Slave address b. Function
H10
(8 bits)
(8 bits)
• Query message setting
Message
a Slave address
b Function
c Starting address
d No. of registers
e Byte count
f Data
• Content of normal response
The contents in the normal response (a to d, including the CRC check) are the same as those in the query messages.
c. Subfunction
H00 H00
(8 bits) (8 bits)
c. Subfunction
H00 H00
(8 bits) (8 bits)
Set the address to send messages to. Broadcast communication is not possible. (Invalid when "0" is
set.)
Set H08.
Set H0000.
Any 2-byte long data can be set. The setting range is H0000 to HFFFF.
c. Starting d. No. of
address registers
L H L
(8 bits) (8 bits) (8 bits)
c. Starting address
H L
(8 bits) (8 bits)
Set the address to send messages to. Setting "0" enables broadcast communication.
Set H10.
Set the holding register address from which to start writing the data.
Starting address = start register address (decimal) - 40001
For example, when starting register address 0001 is set, the data of holding register address 40002
is read.
Set the number of holding registers for writing data. Data can be written to up to 125 registers.
The setting range is H02 to HFA (2 to 250). Set twice the value specified by d.
Set the amount of data specified by d. Write data is output Hi bytes first followed by Lo bytes, and
is arranged as follows: data of start address, data of start address+1, data of start address+2, and
so forth.
d. Data
H L
(8 bits) (8 bits)
d. Data
H L
(8 bits) (8 bits)
Description
e. Byte count f. Data
H L
(8 bits)
(8 bits) (8 bits)
d. No. of registers
H L
(8 bits) (8 bits)
Description
5.12 (N) Communication operation parameters
CRC check
L H
(8 bits) (8 bits)
CRC check
L H
(8 bits) (8 bits)
CRC check
...
L H
(n × 2 × 8
(8 bits) (8 bits)
bits)
CRC check
L H
(8 bits) (8 bits)
5. PARAMETERS
1
2
3
4
5
6
7
8
9
10
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