Mitsubishi Electric FR-E700 Instruction Manual page 492

MODBUS®/TCP (FR-E700 SC ENE)
Preset single register (writing data to holding registers) (H06 or 06)
● The content of the system environmental variables and inverter parameters (refer to MODBUS®
register on page 6-345) assigned to the holding register area can be written.
● Query message
³ Transaction
identifier
H
(8 Bits)
● Normal response (Response message)
³ Transaction
identifier
H
(8 Bits)
● Query message setting
Message
³
Transaction identifier
·
Protocol Identifier
»
Length field
¿
Unit identifier
´
Function
²
Register address
¶
Preset data
Tab. 6-126: Explanation of the query message
● Content of normal response
With a normal response, the contents in the response are the same as those in ³ to ¶ of the
query message.
Example Write 60 Hz (H1770) to register 40014 (running frequency RAM) in the inverter.
Query message
Transaction
identifier
A given value is set.
Normal response (Response message)
The same data as those in the query message
6 - 338
· Protocol
» Length field
identifier
L H L H
(8 Bits) (8 Bits) (8 Bits) (8 Bits)
· Protocol
» Length field
identifier
L H L H
(8 Bits) (8 Bits) (8 Bits) (8 Bits)
Description
The master adds the data for the purpose of transaction control.
The same data is returned in the response from the slave.
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.
The data length from the unit identifier to the data is stored in byte.
Fixed to 255
Set H06.
Set the holding register address to write data to.
Register address = holding register address (decimal) - 40001
For example, when register address 0001 is set, data is written to holding register address
40002.
Set the data to write to the holding register. Write data is fixed at 2 bytes.
Protocol
identifier
H00 H00 H00
(8 Bits) (8 Bits) (8 Bits)
¿ Unit
identifier
L
(8 Bits)
(8 Bits)
¿ Unit
identifier
L
(8 Bits)
(8 Bits)
Length field Unit identifier
H06 HEF
(8 Bits) (8 Bits)
² Register
´ Function
address
H06 H L
(8 Bits) (8 Bits) (8 Bits)
² Register
´ Function
address
H06 H L
(8 Bits) (8 Bits) (8 Bits)
Func-
Register address
tion
H06 H00 H0D
(8 Bits) (8 Bits) (8 Bits)
Parameter
¶ Preset data
H L
(8 Bits) (8 Bits)
¶ Preset data
H L
(8 Bits) (8 Bits)
Preset data
H17 H70
(8 Bits) (8 Bits)