Mitsubishi Electric fr-e700 series, Instruction Manual

Page: 494 / 608

MODBUS®/TCP (FR-E700 SC ENE) Parameter
6 - 340
Preset multiple registers (writing data to multiple holding registers) (H10 or 16)
●
Data can be written to multiple holding registers.
●
Query message
●
Normal response (Response message)
●
Query message setting
●
Content of normal response
With a normal response, the contents in the response are the same as those in
쐃
to
쐆
of the
query message.
쐃
Transaction
identifier
쐇
Protocol
identifier
쐋
Length field
쐏
Unit
identifier
쐄
Func-
tion
쐂
Starting
address
쐆
No. of Points
쐊
Byte
count
쐎
Data
H
(8 Bits)
L
(8 Bits)
H
(8 Bits)
L
(8 Bits)
H
(8 Bits)
L
(8 Bits)
(8 Bits)
H10
(8 Bits)
H
(8 Bits)
L
(8 Bits)
H
(8 Bits)
L
(8 Bits)
(8 Bits)
H
(8 Bits)
L
(8 Bits)
...
(n × 2
× 8
Bits)
쐃
Transaction
identifier
쐇
Protocol-
identifier
쐋
Length field
쐏
Unit
identifier
쐄
Func-
tion
쐂
Starting
address
쐆
No. of Points
H
(8 Bits)
L
(8 Bits)
H
(8 Bits)
L
(8 Bits)
H
(8 Bits)
L
(8 Bits)
(8 Bits)
H10
(8 Bits)
H
(8 Bits)
L
(8 Bits)
H
(8 Bits)
L
(8 Bits)
Message Description
쐃
Transaction identifier
The master adds the data for the purpose of transaction control.
The same data is returned in the response from the slave.
쐇
Protocol Identifier
Fixed to 0. (When the slave receives data other than 0, it does not send the response
message.)
0 is returned in the response from the slave.
쐋
Length field The data length from the unit identifier to the data is stored in byte.
쐏
Unit identifier Fixed to 255
쐄
Function Set H10.
쐂
Starting address
Set the holding register address from which to start writing the data.
Starting address = start register address (decimal) - 40001
For example, when start register address 0001 is set, the data of holding register address
40002 is read.
쐆
No. of points
Set the number of holding registers for writing data. Data can be read from up to 125
registers.
쐊
Byte count
The setting range is H02 to HFA (2 to 250).
Set the value set in
쐆
multiplied by 2.
쐎
Data
The amount of data specified by
쐆
is set. Write data is output Hi bytes first followed by Lo
bytes, and is arranged as follows: data of start address, data of start 1, data of start
2, and so forth.
Tab. 6-128: Explanation of the query message